Creating Three Points Arcs

This task shows how to create an arc using three reference points in order to define the required size and radius. In this task, we will use the Sketch tools toolbar but, of course you can create this arc manually. For this, move the cursor to activate SmartPick and click as soon as you get what you wish.

By default, arc centers appear on the sketch and are associative. In case you create arcs by clicking, if you do not need them you can specify this in the Tools->Options dialog box. For this, go to Tools->Options, Mechanical Design > Sketcher option at the left of the dialog box (Sketcher tab).

  1. Click Three Point Arc from the Profiles toolbar (Circle sub-toolbar).

  1. The Sketch tools toolbar will display one after the other values for defining the three points of the circle: defining the horizontal (H) and vertical (V) values of three points on the arc. Position the cursor in the desired fields and key in the desired values.

Start Point (H: 12mm and V: 32mm)
Second Point (H: 27mm and V: 17mm)
End Point (H: 12mm and V: 7mm)
The arc results as shown here.