The purpose of this entry is to describe necessary steps to design a basic CAD model of a 360º servo, based on FS90R, that will be placed at the bottom of the base of DYOR Robot.

Our aim is to design a CAD design of a 360º servo (continuous rotation servo) that they are usually placed at hte bottom of the robot’s base. The motors will be glued to the base, so there’s no specific hole required to support it, then all design elements will be drawn in the Auxiliary layer.

The servo measurements are shown below:

We will use the following template:

Let’s start by drawing the servo shape (starting from the ear at the left side) and select the Auxiliary layer:

polyline

0,18.8

@-4.7,0

@0,-2.4

@4.7,0

@0,-16.4

@23.2,0

@0,16.4

@4.7,0

@0,2.4

@-4.7,0

Now, draw three rectangles:

rectangle

0,18.8

23.2,23

rectangle

7.45,23

23.2,27.3

rectangle

14.9,27.3

19.7,30.5

Finally, we can some text and dimensions.

Here you can find the solution: