This tutorial shows how to use a DC motor as a Servo, using a Sabertooth+Kangaroo boards combination and EZ-builder
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Auto Position Movement Panel...
Sabertooth Movement Panel
Sound Servo (PC Mic)
How to use dc motors as servos
I had a very hard time to figure out how to use a DC motor as a servo. My problem was that I wanted to control my full size R2's dome with an ARC servo control, so it would be able to respond to camera tracking and position control.
After a lot of help from genius around here, and some hard way finding out how not to do some things I finally made it.
First I must tell you that without the guiding from some of the most brilliant builders in this forum, it would be impossible to me. Thanks guys.
Ok, let's do it!