{"id":896,"date":"2021-02-04T14:04:48","date_gmt":"2021-02-04T19:04:48","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/autocad\/?post_type=chapter&p=896"},"modified":"2021-07-14T18:19:04","modified_gmt":"2021-07-14T22:19:04","slug":"fillets","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/autocad\/chapter\/fillets\/","title":{"raw":"Module 12: Fillets","rendered":"Module 12: Fillets"},"content":{"raw":"
\r\n

Learning Outcomes<\/p>\r\n\r\n<\/header>\r\n

\r\n\r\nWhen you have completed this module, you will be able to:\r\n
    \r\n \t
  1. Describe tangency and explain how to locate the point of tengency.<\/li>\r\n \t
  2. Describe a fillet.<\/li>\r\n \t
  3. Apply the FILLET command to construct fillets between two drawing objects.<\/li>\r\n \t
  4. Describe the object snap mode Tan.<\/li>\r\n \t
  5. Apply the LINE command using the object snap mode Tan to draw lines tangent to arcs and circles.<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

    Geometry Lesson: Tangency<\/h1>\r\nA point of tangency <\/em><\/span>is the theoretical point where a line joins an arc, two arcs join each other, or two circles join each other making a smooth transition. A line is tangent to a circle or an arc when it passes touching only one point on the circle or arc. The tangent point is located where a line drawn perpendicular from the center of the circle or arc touches the line. Study Figure 12-1.\r\n\r\n[caption id=\"attachment_900\" align=\"aligncenter\" width=\"645\"]\"\" Figure 12-1
    Tangency - Part 1[\/caption]\r\n\r\nA fillet <\/em><\/span>is a tangent arc. A tangent arc must be tangent at both ends where it connects to existing lines or arcs. Figure 12-2 shows five examples of fillets.\r\n\r\n[caption id=\"attachment_901\" align=\"aligncenter\" width=\"584\"]\"\" Figure 12-2
    Tangency - Part 2[\/caption]\r\n\r\n
    \r\n

    AutoCAD Command: FILLET<\/p>\r\n\r\n<\/header>\r\n

    \r\n\r\nThe FILLET command is used to draw a tangent arc. It inserts an arc tangent to the two existing\r\n\r\ndrawing objects selected in the command.\r\n\r\nShortcut: F<\/strong>\r\n\r\n[caption id=\"attachment_902\" align=\"aligncenter\" width=\"414\"]\"\" Modify Toolbar[\/caption]\r\n\r\n[caption id=\"attachment_903\" align=\"aligncenter\" width=\"219\"]\"\" Modify Pull-down[\/caption]\r\n\r\n[caption id=\"attachment_904\" align=\"aligncenter\" width=\"289\"]\"\" Home Ribbon[\/caption]\r\n\r\n<\/div>\r\n<\/div>\r\n

    WORKALONG: Using the FILLET Command<\/h1>\r\n

    Step 1<\/h2>\r\nStart a new drawing using the template: 2D English<\/span>.\r\n

    Step 2<\/h2>\r\nSave and name the drawing: AutoCAD 2D Workalong 12-1<\/span>.\r\n

    Step 3<\/h2>\r\nCreate layers: Object<\/span> and Construction<\/span>. Set layer: Object<\/span> as the current layer.\r\n\r\n[caption id=\"attachment_905\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 4A[\/caption]\r\n\r\n
    \r\n

    Drawing Outside the Box<\/strong><\/h1>\r\nAUTHOR'S COMMENTS: <\/strong>Up to this point in the book, you have been drawing lines knowing the exact location and length of the lines. In this module, you will learn how to draw lines without knowing their exact length. You must know the exact start point of the line and the line's direction. You guess at its length either drawing it longer or shorter than its actual length. It is best to draw it longer. You then trim or extend the lines to their exact length using the FILLET command. This workalong will teach you how to do this.\r\n\r\n<\/div>\r\n

    Step 4<\/h2>\r\nUsing the LINE command and referring to the figures, draw the 6 lines to match the figure. (Figure Step 4A and 4B)\r\n\r\n[caption id=\"attachment_907\" align=\"aligncenter\" width=\"234\"]\"\" Figure Step 4B[\/caption]\r\n

    Step 5<\/h2>\r\nUsing the LINE command, draw the vertical line. (Figure Step 5A and 5B)\r\n\r\n[caption id=\"attachment_908\" align=\"aligncenter\" width=\"235\"]\"\" Figure Step 5A[\/caption]\r\n\r\n[caption id=\"attachment_909\" align=\"aligncenter\" width=\"335\"]\"\" Figure Step 5B[\/caption]\r\n\r\n
    \r\n\r\nAUTHOR'S COMMENTS: <\/strong>To draw this line, you must know its start point. Figure Step 5B shows how I solved the start point of the line. Since you don`t know the exact length of the line, guess at the length and try to draw it longer. I drew it 3.5 inches. Ensure you understand how I solved for the start point.\r\n\r\n<\/div>\r\n

    Step 6<\/h2>\r\nUsing the LINE command, draw the inclined line. First you have to solve the angle. Guess at the length and try to make it longer. After you know the angle and the length, snap to end point of the existing to start the line. (Figure Step 6A and 6B)\r\n\r\n[caption id=\"attachment_910\" align=\"aligncenter\" width=\"235\"]\"\" Figure Step 6A[\/caption]\r\n\r\n[caption id=\"attachment_911\" align=\"aligncenter\" width=\"528\"]\"\" Figure Step 6B[\/caption]\r\n\r\n
    \r\n\r\nAUTHOR'S COMMENTS: <\/strong>Figure Step 6B shows the three steps I used to solve the angle of the line. Draw it longer than required since you don`t know its exact length. I drew it 2.0 inches long.\r\n\r\n<\/div>\r\n

    Step 7<\/h2>\r\nUsing the principles you just learned, use the LINE command to draw the two lines on the left side of the object. (Figure Step 7)\r\n\r\n[caption id=\"attachment_912\" align=\"aligncenter\" width=\"176\"]\"\" Figure Step 7[\/caption]\r\n

    Step 8<\/h2>\r\nEnter the FILLET command, as shown below, and select the two vertical lines to insert the fillet (tangent arc). (Figure Step 8A, 8B, and 8C)\r\n\r\nCommand: FILLET<\/strong>\r\n\r\nCurrent settings: Mode = NOTRIM, Radius = 0.5000\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: T<\/strong>\r\n\r\nEnter Trim mode option [Trim\/No trim] <No trim>: T<\/strong>\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]:\r\n\r\nCommand: (This commands simply sets the FILLET command to trim objects when filleted. You only have to do this the first time you use the FILLET command or if you re-set it to NOTRIM.)<\/span> <\/em>\r\n\r\nCommand: FILLET<\/strong>\r\n\r\nCurrent settings: Mode = TRIM, Radius = 0.0000\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: (Pick left vertical line)<\/strong>\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: (Pick right vertical line) <\/strong>\r\n\r\nSelect second object or shift-select to apply corner:\r\n\r\nCommand:\r\n\r\n[caption id=\"attachment_916\" align=\"aligncenter\" width=\"393\"]\"\" Figure Step 8A\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Figure Step 8B[\/caption]\r\n\r\n[caption id=\"attachment_917\" align=\"aligncenter\" width=\"176\"]\"\" Figure Step 8C[\/caption]\r\n\r\n
    \r\n\r\nAUTHOR'S COMMENTS: <\/strong>When the lines selected in the FILLET command are parallel, AutoCAD will automatically calculate the radius of the arc for you, regardless of the current radius setting. Note how the radius is set to zero in this example.\r\n\r\n<\/div>\r\n

    Step 9<\/h2>\r\nEnter the FILLET command, as shown below, to insert a 0.5 radius fillet between the two lines. (Figure Step 9A. 9B, and 9C)\r\n\r\nCommand: FILLET<\/strong>\r\n\r\nCurrent settings: Mode = TRIM, Radius = 0.0000\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: R<\/strong>\r\n\r\nSpecify fillet radius <0.0000>: 0.5 (Set the radius for the fillet.)<\/em><\/span>\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: (Pick right vertical line) <\/strong>\r\n\r\nSelect second object or shift-select to apply corner: (Pick the horizontal line) <\/strong>\r\n\r\nCommand:\r\n\r\n[caption id=\"attachment_922\" align=\"aligncenter\" width=\"573\"]\"\" Figure Step 9A\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Figure Step 9B\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Figure Step 9C[\/caption]\r\n\r\n
    AUTHOR'S COMMENTS: <\/strong>Since this fillet is inserted between lines that are not parallel, you must set the radius of the fillet. In this case, 0.5.<\/div>\r\n

    Step 10<\/h2>\r\nUsing what you learned in Step 9, insert the 0.5 radius fillet on the other side to match the figure. (Figure Step 10)\r\n\r\n[caption id=\"attachment_924\" align=\"aligncenter\" width=\"176\"]\"\" Figure Step 10[\/caption]\r\n

    Step 11<\/h2>\r\nUsing what you learned in Step 9 and 10, insert the two 0.75 radius fillets on top left and right corners. (Figure Step 11)\r\n\r\n[caption id=\"attachment_925\" align=\"aligncenter\" width=\"221\"]\"\" Figure Step 11[\/caption]\r\n\r\n
    AUTHOR'S COMMENTS: <\/strong>Ensure that you set the radius in the FILLET command to 0.75 before you select the lines to fillet.<\/div>\r\n

    Step 12<\/h2>\r\nInsert the four 1.0 radius fillets to match the figure. (Figure Step 12)\r\n\r\n[caption id=\"attachment_929\" align=\"aligncenter\" width=\"220\"]\"\" Figure Step 12[\/caption]\r\n

    Step 13<\/h2>\r\nEnter the CIRCLE command and draw 1.0 diameter circle by snapping to the center of the arc to locate the its center. The completed drawing should match the figure. (Figure Step 13A and 13B)\r\n\r\n[caption id=\"attachment_927\" align=\"aligncenter\" width=\"219\"]\"\" Figure Step 13A[\/caption]\r\n\r\n[caption id=\"attachment_928\" align=\"aligncenter\" width=\"198\"]\"\" Figure Step 13B[\/caption]\r\n\r\n
    \r\n\r\nAUTHOR'S COMMENTS:<\/strong> The circle and arc share the same center point. Ensure that AutoSnap is set to locate centers and Osnap is enabled. Use the CIRCLE command and snap to the center of the arc to locate the center of the circle.\r\n\r\n<\/div>\r\n

    Step 14<\/h2>\r\nSave and close the drawing.\r\n\r\n[caption id=\"attachment_930\" align=\"aligncenter\" width=\"642\"]\"\" Figure 12-3
    Object Snap Mode - Tangent[\/caption]\r\n

    WORKALONG: Drawing Tangent Lines<\/h1>\r\n

    Step 1<\/h2>\r\nStart a new drawing using the template: 2D English<\/span>.\r\n

    Step 2<\/h2>\r\nSave and name the drawing: AutoCAD 2D Workalong 12-2<\/span>.\r\n

    Step 3<\/h2>\r\nCreate the layers: Object<\/span> and Construction<\/span>. Set Layer: Construction<\/span> as the current layer.\r\n

    Step 4<\/h2>\r\nReferring to the figures, draw the 2 radius circle with its center at 10,10. (Figure Step 4A and 4B)\r\n\r\n[caption id=\"attachment_935\" align=\"aligncenter\" width=\"468\"]\"\" Figure Step 4A[\/caption]\r\n\r\n[caption id=\"attachment_936\" align=\"aligncenter\" width=\"152\"]\"\" Figure Step 4B[\/caption]\r\n

    Step 5<\/h2>\r\nUsing polar coordinates, enter the LINE command, two times, to draw two construction lines. Start each line starting at the center of the circle and ending at the center of the other two circles. (Figure Step 5)\r\n\r\n[caption id=\"attachment_937\" align=\"aligncenter\" width=\"224\"]\"\" Figure Step 5[\/caption]\r\n

    Step 6<\/h2>\r\nDraw circles locating their centers at the endpoints of the lines you drew in Step 5. (Figure Step 6)\r\n\r\n[caption id=\"attachment_938\" align=\"aligncenter\" width=\"264\"]\"\" Figure Step 6[\/caption]\r\n

    Step 7<\/h2>\r\nEnter the LINE command, as shown below, to draw a line tangent to the two circles. Enter the TAN object snap mode manually by typing it in on the keyboard. (Figure Step 7)\r\n\r\nCommand: LINE<\/strong>\r\n\r\nSpecify first point: TAN <\/strong>to P1<\/strong>\r\n\r\nSpecify next point or [Undo]: TAN <\/strong>to P2 <\/strong>Specify next point or [Undo]:\r\n\r\nCommand:\r\n\r\n[caption id=\"attachment_939\" align=\"aligncenter\" width=\"376\"]\"\" Figure Step 7[\/caption]\r\n\r\n
    \r\n\r\nAUTHOR'S COMMENTS: <\/strong>Notice how you have to enter TAN <\/strong>for both ends of the line. It is a very common error to forget to enter it at the second end. Do not use AutoSnap, enter them manually by typing TAN on the keyboard and then press Enter. Note the AutoSnap marker when AutoCAD is finding the tangent location on the circle.\r\n\r\n<\/div>\r\n

    Step 8<\/h2>\r\nUsing what you learned in Step 7, enter the LINE command and draw a line tangent to the two circles as shown in the figure. (Figure Step 8)\r\n\r\n[caption id=\"attachment_940\" align=\"aligncenter\" width=\"368\"]\"\" Figure Step 8[\/caption]\r\n\r\nCommand: LINE<\/strong>\r\n\r\nSpecify first point: TAN <\/strong>to P3<\/strong>\r\n\r\nSpecify next point or [Undo]: TAN <\/strong>to P4 <\/strong>\r\n\r\nSpecify next point or [Undo]:\r\n\r\nCommand:\r\n
    AUTHOR'S COMMENTS: <\/strong>Note the AutoSnap Marker icon that displays when you use the TAN object snap mode.<\/div>\r\n

    Step 9<\/h2>\r\nUsing what you just learned, insert the two tangent lines as shown in the figure. (Figure Step 9)\r\n\r\n[caption id=\"attachment_941\" align=\"aligncenter\" width=\"222\"]\"\" Figure Step 9[\/caption]\r\n

    Step 10<\/h2>\r\nUsing the FILLET command, insert a 3.0 radius fillet as shown in the figures. (Figure Step 10A , 10B, and 10C)\r\n\r\n[caption id=\"attachment_944\" align=\"aligncenter\" width=\"248\"]\"\" Figure Step 10A[\/caption]\r\n\r\n[caption id=\"attachment_945\" align=\"aligncenter\" width=\"248\"]\"\" Figure Step 10B[\/caption]\r\n\r\n[caption id=\"attachment_946\" align=\"aligncenter\" width=\"242\"]\"\" Figure Step 10C[\/caption]\r\n

    Step 11<\/h2>\r\nChange the layer of the objects from layer: Construction<\/span> to layer: Object <\/span>to match the figure. (Figure Step 11)\r\n\r\n[caption id=\"attachment_948\" align=\"aligncenter\" width=\"244\"]\"\" Figure Step 11[\/caption]\r\n

    Step 12<\/h2>\r\nFreeze layer: Construction<\/span>. (Figure Step 12)\r\n\r\n[caption id=\"attachment_949\" align=\"aligncenter\" width=\"244\"]\"\" Figure Step 12[\/caption]\r\n\r\n
    \r\n

    Step 13<\/h2>\r\nInsert a 2.0 radius fillet to complete the drawing. (Figure Step 13)\r\n\r\n[caption id=\"attachment_950\" align=\"aligncenter\" width=\"246\"]\"\" Figure Step 13[\/caption]\r\n\r\n<\/div>\r\n

    Step 14<\/h2>\r\nSave and close the drawing.\r\n

    WORKALONG: Drawing Construction Techniques<\/h1>\r\n

    Step 1<\/h2>\r\nStart a new drawing using the template: 2D English<\/span>.\r\n

    Step 2<\/h2>\r\nSave and name the drawing: AutoCAD 2D Workalong 12-3<\/span>.\r\n

    Step 3<\/h2>\r\nCreate layers: Object<\/span> and Construction<\/span>. Set layer: Construction as the current layer.\r\n

    Step 4<\/h2>\r\nReferring to the figures, enter the LINE command and draw the lines shown in the figures in two steps. (Figure 4A, 4B, and 4C)\r\n\r\n[caption id=\"attachment_953\" align=\"aligncenter\" width=\"472\"]\"\" Figure Step 4A[\/caption]\r\n\r\n[caption id=\"attachment_952\" align=\"aligncenter\" width=\"467\"]\"\" Figure Step 4B\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Figure Step 4C[\/caption]\r\n\r\n
    \r\n\r\nAUTHOR'S COMMENTS: <\/strong>Draw the vertical line on the left side any length over 4 inches. The length is not important at this time.\r\n\r\n<\/div>\r\n

    Step 5<\/h2>\r\nEnter the LINE command, as shown below, to draw two lines. (Figure Step 5)\r\n\r\nCommand: L<\/strong>\r\n\r\nSpecify first point:<Osnap on> (end) <\/em>P1<\/strong>\r\n\r\nSpecify next point or [Undo]: @2<150<\/strong>\r\n\r\n(Since you don't know the length of the line, draw a line of any length at the correct angle.)<\/em><\/span>\r\n\r\nSpecify next point or [Undo]:\r\n\r\nCommand: L<\/strong>\r\n\r\nSpecify first point: (end) <\/em>P2<\/strong>\r\n\r\nSpecify next point or [Undo]: @3<210<\/strong>\r\n\r\n(Draw any length line at the correct angle.)<\/em><\/span>\r\n\r\nSpecify next point or [Undo]:\r\n\r\nCommand:\r\n\r\n[caption id=\"attachment_956\" align=\"aligncenter\" width=\"412\"]\"\" Figure Step 5[\/caption]\r\n

    Step 6<\/h2>\r\nEnter the FILLET as shown below. Set the radius to 0 to create perfect corners. (Figure Step 6A and 6B)\r\n\r\nCommand: FILLET<\/strong>\r\n\r\nCurrent settings: Mode = TRIM, Radius = 0.3500\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: R<\/strong>\r\n\r\nSpecify fillet radius <0.3500>: 0<\/strong>\r\n\r\n(Set the radius to zero.)<\/em><\/span>\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: P3 <\/strong>\r\n\r\nSelect second object or shift-select to apply corner: P4 <\/strong>\r\n\r\nCommand: F<\/strong>\r\n\r\n(F is the shortcut for the command FILLET.)<\/em><\/span>\r\n\r\nCurrent settings: Mode = TRIM, Radius = 0.0000\r\n\r\nSelect first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: P5<\/strong>\r\n\r\nSelect second object or shift-select to apply corner: P6 <\/strong>\r\n\r\nCommand:\r\n\r\n[caption id=\"attachment_957\" align=\"aligncenter\" width=\"589\"]\"\" Figure Step 6A\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Figure Step 6B[\/caption]\r\n\r\n
    AUTHOR'S COMMENTS: <\/strong>By setting the fillet radius to zero, the FILLET command will trim the lines to create perfect corners.<\/div>\r\n

    Step 7<\/h2>\r\nChange the layer of the necessary lines to reside on layer: Object. Freeze layer: Construction<\/span>. (Figure Step 7)\r\n\r\n[caption id=\"attachment_958\" align=\"aligncenter\" width=\"218\"]\"\" Figure Step 7[\/caption]\r\n

    Step 8<\/h2>\r\nSave and close the drawing.\r\n
    \r\n\r\nUSER TIP: <\/strong>To insert an arc at the end of two parallel lines, use the FILLET command.Regardless of what radius is currently set in the FILLET command, AutoCAD will draw a tangent arc using the one-half distance between the lines as the radius. The lines do not have to be the same length.\r\n\r\nCommand: FILLET<\/strong>\r\n\r\nCurrent settings: Mode = TRIM, Radius = 0.0\r\n\r\n(Notice how the radius is set to zero. It can be any size.)<\/em><\/span>\r\n\r\nSelect first object or [Polyline\/Radius\/Trim]: P1<\/strong>\r\n\r\n(The first line you pick will retain it's original length and the second one will be trimmed or extended.)<\/em><\/span>\r\n\r\nSelect second object: P2<\/strong>\r\n\r\nCommand\r\n\r\n[caption id=\"attachment_959\" align=\"aligncenter\" width=\"589\"]\"\" Before[\/caption]\r\n\r\n<\/div>\r\n
    \r\n\r\nUSER TIP: <\/strong>By setting the radius of the FILLET command to zero, the FILLET command will square the lines to make a perfect corner. The lines can be too short or too long or a combination of the two as shown in the figure on the right.\r\n\r\n[caption id=\"attachment_960\" align=\"aligncenter\" width=\"356\"]\"\" Before After[\/caption]\r\n\r\n<\/div>\r\n

    Key Principles<\/h1>\r\n
    \r\n

    Key Principles in Module 12<\/p>\r\n\r\n<\/header>\r\n

    \r\n
      \r\n \t
    1. Point of tangency is the theoretical point where a line joins an arc, two arcs join each other, or two circles join each other making a smooth transition.<\/li>\r\n \t
    2. A fillet is a tangent arc. To construct a fillet, use the FILLET command. The rule of thumb to follow is ' If the arc you are drawing is tangent to both objects it is connecting to, use the FILLET command. If the arc is tangent to one or neither of the objects, use the ARC command '.<\/li>\r\n \t
    3. Use the LINE command and the TAN object snap mode to draw lines tangent to two circles or arcs. Make sure that you apply it to both ends of the line.<\/li>\r\n \t
    4. By setting the radius of the FILLET command to zero, the FILLET command will square two lines to make a perfect corner.<\/li>\r\n<\/ol>\r\n<\/div>\r\n<\/div>\r\n

      Lab Exercise 12-1<\/h1>\r\nTime allowed: 30 minutes.\r\n\r\n\r\n\r\n\r\n
      Drawing Name<\/th>\r\nTemplate<\/th>\r\nUnits<\/th>\r\n<\/tr>\r\n
      AutoCAD 2D Lab 12-1<\/td>\r\n2D English<\/td>\r\nInches<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n\r\n
      Layering Scheme<\/span><\/caption>\r\n
      Layer Name<\/th>\r\nObjects on Layer<\/th>\r\nColor<\/th>\r\n<\/tr>\r\n
      Construction<\/td>\r\nConstruction objects<\/td>\r\n253<\/td>\r\n<\/tr>\r\n
      Object<\/td>\r\nLines, circle and arcs<\/td>\r\nRed<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

      Step 1<\/h2>\r\nDraw the object shown in the figures using the layering scheme. (Figure Step 1A and 1B)\r\n\r\n[caption id=\"attachment_955\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 1A[\/caption]\r\n\r\n
      \r\n\r\nAUTHOR'S COMMENTS: <\/strong>Do not delete the construction lines.\r\n\r\n<\/div>\r\n \r\n\r\n[caption id=\"attachment_962\" align=\"aligncenter\" width=\"289\"]\"\" Figure Step 1B
      Completed Drawing[\/caption]\r\n

      Step 2<\/h2>\r\nSet the insertion units and check your drawing with the key.\r\n

      Step 3<\/h2>\r\nTurn layer: Key<\/span> off and freeze layer: Construction<\/span>.\r\n

      Step 4<\/h2>\r\nSave and close the drawing.\r\n
      AUTHOR'S CONSTRUCTION TECHNIQUES: <\/strong>The following steps are the construction technique suggested by the author to help you learn how to construct objects using AutoCAD. It is only the suggested method and if you can complete the drawing accurately using a different construction technique, that is what is important. You may want to compare your construction technique with the authors.<\/div>\r\n\"\"\r\n
      AUTHOR'S CONSTRUCTION HINTS: <\/strong>Do your best to complete the lab exercise drawing without using the following hint. If you get stuck and cannot complete it on your own, use the following hint to help you.\r\n<\/strong><\/div>\r\n

      Hint 1<\/h2>\r\nThe dashed line shown in the dimensioned drawing indicates that the lines should be constructed tangent to the small circle from the circles on either end of the object. After the lines are inserted tangent to both circles, you can then insert the fillet. (Figure Hint 1)\r\n\r\n \r\n\r\n[caption id=\"attachment_965\" align=\"aligncenter\" width=\"330\"]\"\" Figure Hint 1[\/caption]\r\n

      Lab Exercise 12-2<\/h1>\r\nTime allowed: 30 minutes.\r\n\r\n\r\n\r\n\r\n
      Drawing Name<\/th>\r\nTemplate<\/th>\r\nUnits<\/th>\r\n<\/tr>\r\n
      AutoCAD 2D Lab 12-2<\/td>\r\n2D Metric<\/td>\r\nMillimeters<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n\r\n
      Layering Scheme<\/span><\/caption>\r\n
      Layer Name<\/th>\r\nObjects on Layer<\/th>\r\nColor<\/th>\r\n<\/tr>\r\n
      Construction<\/td>\r\nConstruction objects<\/td>\r\n253<\/td>\r\n<\/tr>\r\n
      Object<\/td>\r\nLines, circles and arcs<\/td>\r\nRed<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

      Step 1<\/h2>\r\nDraw the object shown in the dimensioned drawing using the layering scheme. (Figure Step 1A and 1B)\r\n\r\n[caption id=\"attachment_966\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 1A[\/caption]\r\n\r\n
      AUTHOR'S COMMENTS: <\/strong>Do not delete the construction lines<\/div>\r\n\r\n[caption id=\"attachment_967\" align=\"aligncenter\" width=\"206\"]\"\" Figure Step 1B
      Completed Drawing[\/caption]\r\n

      Step 2<\/h2>\r\nSet the insertion units and check your drawing with the key.\r\n

      Step 3<\/h2>\r\nTurn layer: Key off and freeze layer: Construction.\r\n

      Step 4<\/h2>\r\nSave and close the drawing.\r\n
      AUTHOR'S CONSTRUCTION TECHNIQUES: <\/strong>The following steps are the construction technique suggested by the author to help you learn how to construct objects using AutoCAD. It is only the suggested method and if you can complete the drawing accurately using a different construction technique, that is what is important. You may want to compare your construction technique with the authors.<\/div>\r\n\"\"\r\n
      AUTHOR'S CONSTRUCTION HINTS: <\/strong>Do your best to complete the lab exercise drawing without using the following hints. If you get stuck and cannot complete it on your own, use the following hints to help you.<\/div>\r\n

      Hint 1<\/h2>\r\nDraw a construction line from the midpoint of the line across the bottom of the slot 95 units in the positive Y direction. Draw a circle with its center at the end of the line. (Figure Hint 1)\r\n\r\n[caption id=\"attachment_969\" align=\"aligncenter\" width=\"223\"]\"\" Figure Hint 1[\/caption]\r\n

      Hint 2<\/h2>\r\nSince you don't know the exact length of the lines shown in the figure, draw them any length but in the correct direction. When you insert the fillets, the line will automatically be trimmed. (Figure Hint 2)\r\n\r\n[caption id=\"attachment_970\" align=\"aligncenter\" width=\"225\"]\"\" Figure Hint 2[\/caption]\r\n\r\n ","rendered":"
      \n
      \n

      Learning Outcomes<\/p>\n<\/header>\n

      \n

      When you have completed this module, you will be able to:<\/p>\n

        \n
      1. Describe tangency and explain how to locate the point of tengency.<\/li>\n
      2. Describe a fillet.<\/li>\n
      3. Apply the FILLET command to construct fillets between two drawing objects.<\/li>\n
      4. Describe the object snap mode Tan.<\/li>\n
      5. Apply the LINE command using the object snap mode Tan to draw lines tangent to arcs and circles.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

        Geometry Lesson: Tangency<\/h1>\n

        A point of tangency <\/em><\/span>is the theoretical point where a line joins an arc, two arcs join each other, or two circles join each other making a smooth transition. A line is tangent to a circle or an arc when it passes touching only one point on the circle or arc. The tangent point is located where a line drawn perpendicular from the center of the circle or arc touches the line. Study Figure 12-1.<\/p>\n

        \"\"
        Figure 12-1
        Tangency – Part 1<\/figcaption><\/figure>\n

        A fillet <\/em><\/span>is a tangent arc. A tangent arc must be tangent at both ends where it connects to existing lines or arcs. Figure 12-2 shows five examples of fillets.<\/p>\n

        \"\"
        Figure 12-2
        Tangency – Part 2<\/figcaption><\/figure>\n
        \n
        \n

        AutoCAD Command: FILLET<\/p>\n<\/header>\n

        \n

        The FILLET command is used to draw a tangent arc. It inserts an arc tangent to the two existing<\/p>\n

        drawing objects selected in the command.<\/p>\n

        Shortcut: F<\/strong><\/p>\n

        \"\"
        Modify Toolbar<\/figcaption><\/figure>\n
        \"\"
        Modify Pull-down<\/figcaption><\/figure>\n
        \"\"
        Home Ribbon<\/figcaption><\/figure>\n<\/div>\n<\/div>\n

        WORKALONG: Using the FILLET Command<\/h1>\n

        Step 1<\/h2>\n

        Start a new drawing using the template: 2D English<\/span>.<\/p>\n

        Step 2<\/h2>\n

        Save and name the drawing: AutoCAD 2D Workalong 12-1<\/span>.<\/p>\n

        Step 3<\/h2>\n

        Create layers: Object<\/span> and Construction<\/span>. Set layer: Object<\/span> as the current layer.<\/p>\n

        \"\"
        Figure Step 4A<\/figcaption><\/figure>\n
        \n

        Drawing Outside the Box<\/strong><\/h1>\n

        AUTHOR’S COMMENTS: <\/strong>Up to this point in the book, you have been drawing lines knowing the exact location and length of the lines. In this module, you will learn how to draw lines without knowing their exact length. You must know the exact start point of the line and the line’s direction. You guess at its length either drawing it longer or shorter than its actual length. It is best to draw it longer. You then trim or extend the lines to their exact length using the FILLET command. This workalong will teach you how to do this.<\/p>\n<\/div>\n

        Step 4<\/h2>\n

        Using the LINE command and referring to the figures, draw the 6 lines to match the figure. (Figure Step 4A and 4B)<\/p>\n

        \"\"
        Figure Step 4B<\/figcaption><\/figure>\n

        Step 5<\/h2>\n

        Using the LINE command, draw the vertical line. (Figure Step 5A and 5B)<\/p>\n

        \"\"
        Figure Step 5A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 5B<\/figcaption><\/figure>\n
        \n

        AUTHOR’S COMMENTS: <\/strong>To draw this line, you must know its start point. Figure Step 5B shows how I solved the start point of the line. Since you don`t know the exact length of the line, guess at the length and try to draw it longer. I drew it 3.5 inches. Ensure you understand how I solved for the start point.<\/p>\n<\/div>\n

        Step 6<\/h2>\n

        Using the LINE command, draw the inclined line. First you have to solve the angle. Guess at the length and try to make it longer. After you know the angle and the length, snap to end point of the existing to start the line. (Figure Step 6A and 6B)<\/p>\n

        \"\"
        Figure Step 6A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 6B<\/figcaption><\/figure>\n
        \n

        AUTHOR’S COMMENTS: <\/strong>Figure Step 6B shows the three steps I used to solve the angle of the line. Draw it longer than required since you don`t know its exact length. I drew it 2.0 inches long.<\/p>\n<\/div>\n

        Step 7<\/h2>\n

        Using the principles you just learned, use the LINE command to draw the two lines on the left side of the object. (Figure Step 7)<\/p>\n

        \"\"
        Figure Step 7<\/figcaption><\/figure>\n

        Step 8<\/h2>\n

        Enter the FILLET command, as shown below, and select the two vertical lines to insert the fillet (tangent arc). (Figure Step 8A, 8B, and 8C)<\/p>\n

        Command: FILLET<\/strong><\/p>\n

        Current settings: Mode = NOTRIM, Radius = 0.5000<\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: T<\/strong><\/p>\n

        Enter Trim mode option [Trim\/No trim] <No trim>: T<\/strong><\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]:<\/p>\n

        Command: (This commands simply sets the FILLET command to trim objects when filleted. You only have to do this the first time you use the FILLET command or if you re-set it to NOTRIM.)<\/span> <\/em><\/p>\n

        Command: FILLET<\/strong><\/p>\n

        Current settings: Mode = TRIM, Radius = 0.0000<\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: (Pick left vertical line)<\/strong><\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: (Pick right vertical line) <\/strong><\/p>\n

        Select second object or shift-select to apply corner:<\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 8A\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Figure Step 8B<\/figcaption><\/figure>\n
        \"\"
        Figure Step 8C<\/figcaption><\/figure>\n
        \n

        AUTHOR’S COMMENTS: <\/strong>When the lines selected in the FILLET command are parallel, AutoCAD will automatically calculate the radius of the arc for you, regardless of the current radius setting. Note how the radius is set to zero in this example.<\/p>\n<\/div>\n

        Step 9<\/h2>\n

        Enter the FILLET command, as shown below, to insert a 0.5 radius fillet between the two lines. (Figure Step 9A. 9B, and 9C)<\/p>\n

        Command: FILLET<\/strong><\/p>\n

        Current settings: Mode = TRIM, Radius = 0.0000<\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: R<\/strong><\/p>\n

        Specify fillet radius <0.0000>: 0.5 (Set the radius for the fillet.)<\/em><\/span><\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: (Pick right vertical line) <\/strong><\/p>\n

        Select second object or shift-select to apply corner: (Pick the horizontal line) <\/strong><\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 9A\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Figure Step 9B\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Figure Step 9C<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>Since this fillet is inserted between lines that are not parallel, you must set the radius of the fillet. In this case, 0.5.<\/div>\n

        Step 10<\/h2>\n

        Using what you learned in Step 9, insert the 0.5 radius fillet on the other side to match the figure. (Figure Step 10)<\/p>\n

        \"\"
        Figure Step 10<\/figcaption><\/figure>\n

        Step 11<\/h2>\n

        Using what you learned in Step 9 and 10, insert the two 0.75 radius fillets on top left and right corners. (Figure Step 11)<\/p>\n

        \"\"
        Figure Step 11<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>Ensure that you set the radius in the FILLET command to 0.75 before you select the lines to fillet.<\/div>\n

        Step 12<\/h2>\n

        Insert the four 1.0 radius fillets to match the figure. (Figure Step 12)<\/p>\n

        \"\"
        Figure Step 12<\/figcaption><\/figure>\n

        Step 13<\/h2>\n

        Enter the CIRCLE command and draw 1.0 diameter circle by snapping to the center of the arc to locate the its center. The completed drawing should match the figure. (Figure Step 13A and 13B)<\/p>\n

        \"\"
        Figure Step 13A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 13B<\/figcaption><\/figure>\n
        \n

        AUTHOR’S COMMENTS:<\/strong> The circle and arc share the same center point. Ensure that AutoSnap is set to locate centers and Osnap is enabled. Use the CIRCLE command and snap to the center of the arc to locate the center of the circle.<\/p>\n<\/div>\n

        Step 14<\/h2>\n

        Save and close the drawing.<\/p>\n

        \"\"
        Figure 12-3
        Object Snap Mode – Tangent<\/figcaption><\/figure>\n

        WORKALONG: Drawing Tangent Lines<\/h1>\n

        Step 1<\/h2>\n

        Start a new drawing using the template: 2D English<\/span>.<\/p>\n

        Step 2<\/h2>\n

        Save and name the drawing: AutoCAD 2D Workalong 12-2<\/span>.<\/p>\n

        Step 3<\/h2>\n

        Create the layers: Object<\/span> and Construction<\/span>. Set Layer: Construction<\/span> as the current layer.<\/p>\n

        Step 4<\/h2>\n

        Referring to the figures, draw the 2 radius circle with its center at 10,10. (Figure Step 4A and 4B)<\/p>\n

        \"\"
        Figure Step 4A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 4B<\/figcaption><\/figure>\n

        Step 5<\/h2>\n

        Using polar coordinates, enter the LINE command, two times, to draw two construction lines. Start each line starting at the center of the circle and ending at the center of the other two circles. (Figure Step 5)<\/p>\n

        \"\"
        Figure Step 5<\/figcaption><\/figure>\n

        Step 6<\/h2>\n

        Draw circles locating their centers at the endpoints of the lines you drew in Step 5. (Figure Step 6)<\/p>\n

        \"\"
        Figure Step 6<\/figcaption><\/figure>\n

        Step 7<\/h2>\n

        Enter the LINE command, as shown below, to draw a line tangent to the two circles. Enter the TAN object snap mode manually by typing it in on the keyboard. (Figure Step 7)<\/p>\n

        Command: LINE<\/strong><\/p>\n

        Specify first point: TAN <\/strong>to P1<\/strong><\/p>\n

        Specify next point or [Undo]: TAN <\/strong>to P2 <\/strong>Specify next point or [Undo]:<\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 7<\/figcaption><\/figure>\n
        \n

        AUTHOR’S COMMENTS: <\/strong>Notice how you have to enter TAN <\/strong>for both ends of the line. It is a very common error to forget to enter it at the second end. Do not use AutoSnap, enter them manually by typing TAN on the keyboard and then press Enter. Note the AutoSnap marker when AutoCAD is finding the tangent location on the circle.<\/p>\n<\/div>\n

        Step 8<\/h2>\n

        Using what you learned in Step 7, enter the LINE command and draw a line tangent to the two circles as shown in the figure. (Figure Step 8)<\/p>\n

        \"\"
        Figure Step 8<\/figcaption><\/figure>\n

        Command: LINE<\/strong><\/p>\n

        Specify first point: TAN <\/strong>to P3<\/strong><\/p>\n

        Specify next point or [Undo]: TAN <\/strong>to P4 <\/strong><\/p>\n

        Specify next point or [Undo]:<\/p>\n

        Command:<\/p>\n

        AUTHOR’S COMMENTS: <\/strong>Note the AutoSnap Marker icon that displays when you use the TAN object snap mode.<\/div>\n

        Step 9<\/h2>\n

        Using what you just learned, insert the two tangent lines as shown in the figure. (Figure Step 9)<\/p>\n

        \"\"
        Figure Step 9<\/figcaption><\/figure>\n

        Step 10<\/h2>\n

        Using the FILLET command, insert a 3.0 radius fillet as shown in the figures. (Figure Step 10A , 10B, and 10C)<\/p>\n

        \"\"
        Figure Step 10A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 10B<\/figcaption><\/figure>\n
        \"\"
        Figure Step 10C<\/figcaption><\/figure>\n

        Step 11<\/h2>\n

        Change the layer of the objects from layer: Construction<\/span> to layer: Object <\/span>to match the figure. (Figure Step 11)<\/p>\n

        \"\"
        Figure Step 11<\/figcaption><\/figure>\n

        Step 12<\/h2>\n

        Freeze layer: Construction<\/span>. (Figure Step 12)<\/p>\n

        \"\"
        Figure Step 12<\/figcaption><\/figure>\n
        \n

        Step 13<\/h2>\n

        Insert a 2.0 radius fillet to complete the drawing. (Figure Step 13)<\/p>\n

        \"\"
        Figure Step 13<\/figcaption><\/figure>\n<\/div>\n

        Step 14<\/h2>\n

        Save and close the drawing.<\/p>\n

        WORKALONG: Drawing Construction Techniques<\/h1>\n

        Step 1<\/h2>\n

        Start a new drawing using the template: 2D English<\/span>.<\/p>\n

        Step 2<\/h2>\n

        Save and name the drawing: AutoCAD 2D Workalong 12-3<\/span>.<\/p>\n

        Step 3<\/h2>\n

        Create layers: Object<\/span> and Construction<\/span>. Set layer: Construction as the current layer.<\/p>\n

        Step 4<\/h2>\n

        Referring to the figures, enter the LINE command and draw the lines shown in the figures in two steps. (Figure 4A, 4B, and 4C)<\/p>\n

        \"\"
        Figure Step 4A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 4B\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Figure Step 4C<\/figcaption><\/figure>\n
        \n

        AUTHOR’S COMMENTS: <\/strong>Draw the vertical line on the left side any length over 4 inches. The length is not important at this time.<\/p>\n<\/div>\n

        Step 5<\/h2>\n

        Enter the LINE command, as shown below, to draw two lines. (Figure Step 5)<\/p>\n

        Command: L<\/strong><\/p>\n

        Specify first point:<Osnap on> (end) <\/em>P1<\/strong><\/p>\n

        Specify next point or [Undo]: @2<150<\/strong><\/p>\n

        (Since you don’t know the length of the line, draw a line of any length at the correct angle.)<\/em><\/span><\/p>\n

        Specify next point or [Undo]:<\/p>\n

        Command: L<\/strong><\/p>\n

        Specify first point: (end) <\/em>P2<\/strong><\/p>\n

        Specify next point or [Undo]: @3<210<\/strong><\/p>\n

        (Draw any length line at the correct angle.)<\/em><\/span><\/p>\n

        Specify next point or [Undo]:<\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 5<\/figcaption><\/figure>\n

        Step 6<\/h2>\n

        Enter the FILLET as shown below. Set the radius to 0 to create perfect corners. (Figure Step 6A and 6B)<\/p>\n

        Command: FILLET<\/strong><\/p>\n

        Current settings: Mode = TRIM, Radius = 0.3500<\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: R<\/strong><\/p>\n

        Specify fillet radius <0.3500>: 0<\/strong><\/p>\n

        (Set the radius to zero.)<\/em><\/span><\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: P3 <\/strong><\/p>\n

        Select second object or shift-select to apply corner: P4 <\/strong><\/p>\n

        Command: F<\/strong><\/p>\n

        (F is the shortcut for the command FILLET.)<\/em><\/span><\/p>\n

        Current settings: Mode = TRIM, Radius = 0.0000<\/p>\n

        Select first object or [Undo\/Polyline\/Radius\/Trim\/Multiple]: P5<\/strong><\/p>\n

        Select second object or shift-select to apply corner: P6 <\/strong><\/p>\n

        Command:<\/p>\n

        \"\"
        Figure Step 6A\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Figure Step 6B<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>By setting the fillet radius to zero, the FILLET command will trim the lines to create perfect corners.<\/div>\n

        Step 7<\/h2>\n

        Change the layer of the necessary lines to reside on layer: Object. Freeze layer: Construction<\/span>. (Figure Step 7)<\/p>\n

        \"\"
        Figure Step 7<\/figcaption><\/figure>\n

        Step 8<\/h2>\n

        Save and close the drawing.<\/p>\n

        \n

        USER TIP: <\/strong>To insert an arc at the end of two parallel lines, use the FILLET command.Regardless of what radius is currently set in the FILLET command, AutoCAD will draw a tangent arc using the one-half distance between the lines as the radius. The lines do not have to be the same length.<\/p>\n

        Command: FILLET<\/strong><\/p>\n

        Current settings: Mode = TRIM, Radius = 0.0<\/p>\n

        (Notice how the radius is set to zero. It can be any size.)<\/em><\/span><\/p>\n

        Select first object or [Polyline\/Radius\/Trim]: P1<\/strong><\/p>\n

        (The first line you pick will retain it’s original length and the second one will be trimmed or extended.)<\/em><\/span><\/p>\n

        Select second object: P2<\/strong><\/p>\n

        Command<\/p>\n

        \"\"
        Before<\/figcaption><\/figure>\n<\/div>\n
        \n

        USER TIP: <\/strong>By setting the radius of the FILLET command to zero, the FILLET command will square the lines to make a perfect corner. The lines can be too short or too long or a combination of the two as shown in the figure on the right.<\/p>\n

        \"\"
        Before After<\/figcaption><\/figure>\n<\/div>\n

        Key Principles<\/h1>\n
        \n
        \n

        Key Principles in Module 12<\/p>\n<\/header>\n

        \n
          \n
        1. Point of tangency is the theoretical point where a line joins an arc, two arcs join each other, or two circles join each other making a smooth transition.<\/li>\n
        2. A fillet is a tangent arc. To construct a fillet, use the FILLET command. The rule of thumb to follow is ‘ If the arc you are drawing is tangent to both objects it is connecting to, use the FILLET command. If the arc is tangent to one or neither of the objects, use the ARC command ‘.<\/li>\n
        3. Use the LINE command and the TAN object snap mode to draw lines tangent to two circles or arcs. Make sure that you apply it to both ends of the line.<\/li>\n
        4. By setting the radius of the FILLET command to zero, the FILLET command will square two lines to make a perfect corner.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

          Lab Exercise 12-1<\/h1>\n

          Time allowed: 30 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 2D Lab 12-1<\/td>\n2D English<\/td>\nInches<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n
          Layering Scheme<\/span><\/caption>\n
          Layer Name<\/th>\nObjects on Layer<\/th>\nColor<\/th>\n<\/tr>\n
          Construction<\/td>\nConstruction objects<\/td>\n253<\/td>\n<\/tr>\n
          Object<\/td>\nLines, circle and arcs<\/td>\nRed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          Draw the object shown in the figures using the layering scheme. (Figure Step 1A and 1B)<\/p>\n

          \"\"
          Figure Step 1A<\/figcaption><\/figure>\n
          \n

          AUTHOR’S COMMENTS: <\/strong>Do not delete the construction lines.<\/p>\n<\/div>\n

           <\/p>\n

          \"\"
          Figure Step 1B
          Completed Drawing<\/figcaption><\/figure>\n

          Step 2<\/h2>\n

          Set the insertion units and check your drawing with the key.<\/p>\n

          Step 3<\/h2>\n

          Turn layer: Key<\/span> off and freeze layer: Construction<\/span>.<\/p>\n

          Step 4<\/h2>\n

          Save and close the drawing.<\/p>\n

          AUTHOR’S CONSTRUCTION TECHNIQUES: <\/strong>The following steps are the construction technique suggested by the author to help you learn how to construct objects using AutoCAD. It is only the suggested method and if you can complete the drawing accurately using a different construction technique, that is what is important. You may want to compare your construction technique with the authors.<\/div>\n

          \"\"<\/p>\n

          AUTHOR’S CONSTRUCTION HINTS: <\/strong>Do your best to complete the lab exercise drawing without using the following hint. If you get stuck and cannot complete it on your own, use the following hint to help you.
          \n<\/strong><\/div>\n

          Hint 1<\/h2>\n

          The dashed line shown in the dimensioned drawing indicates that the lines should be constructed tangent to the small circle from the circles on either end of the object. After the lines are inserted tangent to both circles, you can then insert the fillet. (Figure Hint 1)<\/p>\n

           <\/p>\n

          \"\"
          Figure Hint 1<\/figcaption><\/figure>\n

          Lab Exercise 12-2<\/h1>\n

          Time allowed: 30 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 2D Lab 12-2<\/td>\n2D Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n
          Layering Scheme<\/span><\/caption>\n
          Layer Name<\/th>\nObjects on Layer<\/th>\nColor<\/th>\n<\/tr>\n
          Construction<\/td>\nConstruction objects<\/td>\n253<\/td>\n<\/tr>\n
          Object<\/td>\nLines, circles and arcs<\/td>\nRed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          Draw the object shown in the dimensioned drawing using the layering scheme. (Figure Step 1A and 1B)<\/p>\n

          \"\"
          Figure Step 1A<\/figcaption><\/figure>\n
          AUTHOR’S COMMENTS: <\/strong>Do not delete the construction lines<\/div>\n
          \"\"
          Figure Step 1B
          Completed Drawing<\/figcaption><\/figure>\n

          Step 2<\/h2>\n

          Set the insertion units and check your drawing with the key.<\/p>\n

          Step 3<\/h2>\n

          Turn layer: Key off and freeze layer: Construction.<\/p>\n

          Step 4<\/h2>\n

          Save and close the drawing.<\/p>\n

          AUTHOR’S CONSTRUCTION TECHNIQUES: <\/strong>The following steps are the construction technique suggested by the author to help you learn how to construct objects using AutoCAD. It is only the suggested method and if you can complete the drawing accurately using a different construction technique, that is what is important. You may want to compare your construction technique with the authors.<\/div>\n

          \"\"<\/p>\n

          AUTHOR’S CONSTRUCTION HINTS: <\/strong>Do your best to complete the lab exercise drawing without using the following hints. If you get stuck and cannot complete it on your own, use the following hints to help you.<\/div>\n

          Hint 1<\/h2>\n

          Draw a construction line from the midpoint of the line across the bottom of the slot 95 units in the positive Y direction. Draw a circle with its center at the end of the line. (Figure Hint 1)<\/p>\n

          \"\"
          Figure Hint 1<\/figcaption><\/figure>\n

          Hint 2<\/h2>\n

          Since you don’t know the exact length of the lines shown in the figure, draw them any length but in the correct direction. When you insert the fillets, the line will automatically be trimmed. (Figure Hint 2)<\/p>\n

          \"\"
          Figure Hint 2<\/figcaption><\/figure>\n

           <\/p>\n","protected":false},"author":1154,"menu_order":1,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-896","chapter","type-chapter","status-publish","hentry"],"part":188,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/chapters\/896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/wp\/v2\/users\/1154"}],"version-history":[{"count":24,"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/chapters\/896\/revisions"}],"predecessor-version":[{"id":3375,"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/chapters\/896\/revisions\/3375"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/parts\/188"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/chapters\/896\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/wp\/v2\/media?parent=896"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/pressbooks\/v2\/chapter-type?post=896"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/wp\/v2\/contributor?post=896"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/autocad\/wp-json\/wp\/v2\/license?post=896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}