> Create and modify a tangent model

Create and modify a tangent model
Difficulty: Intermediate
Draw precise profiles
1.
2.
Select the border of the workplane in the viewport. A Command Mini Toolbar (CMT) opens.
3.
Click on the CMT to draw a circle.
4.
Draw two concentric circles of radius 40 units and radius 20 units respectively, on the workplane.
5.
Select the border of the workplane and click on the CMT to draw a line, which is tangential to the circle.
6.
Draw a horizontal line, which is tangential to the outer circle.
7.
Select the border of the workplane and click on the CMT to draw a circle.
8.
Press SPACEBAR, click on the Option Mini Toolbar (OMT), and draw a circle (radius 25 units) such that the earlier line is tangential to this circle also. This circle is at a distance of 49 units from the end of the line.
9.
Draw a concentric inner circle of radius 5 units.
10.
Select the border of the workplane, click on the CMT, and draw a line, which is tangential to the two outer circles as shown in the video. The 2D CoPilot visual feedback helps you to draw the line such that it is tangential to both circles.
11.
Draw another circle which touches the above line and the earlier outer circle (radius 25 units), as shown in the video.
 Hint: Want to refine your feedback?Click File > Settings > 2D Copilot to refine the values you see as you create geometry. On the 2D CoPilot Settings dialog box, on the Drag pane, Dynamic (Smaller) shows the detailed measurements to multiple decimal places. Larger shows coarser measures.
 Don't forget to click to complete each operation. Rotate, pan, or zoom for a better view. (shortcuts)
 Shortcuts:
Pull profiles
 1 2 Select the border of the workplane with the profile. The visual feedback shows the areas selected for the pull operation. 3 Cancel the selection of a circular area as shown in the video. 4 Pull the profile into a 3D object. 5 Drag the cursor to select the 3D object and click on the CMT. 6 Select the lowermost edge of the 3D object, press SPACEBAR to open the OMT, and click Keep Tan on the OMT. 7 Move the selected part of the 3D object such that it is tangential to the base line. 8 Drag the fixed reference point (red anchor point) to the center of the larger hole and drag the moved reference (green anchor point) to the center of the smaller hole. 9 Finally drag the green anchor to modify the 3D object. The distance between the two anchor points should be 110 units.