Usually, when you want a servo motor, you simply buy one already made. But if you need something unusual, you can turn any DC motor into a custom servo you can control just like [Dejan] did.
[Jim Fong] sent in this demo of his version of the UHU servo motor controller. [Uli Huber] has actually shipped over 2500 controllers for the servo. He doesn’t charge much for the chips ...
Servo systems can be difficult to troubleshoot, but their digital controls usually have extensive diagnostic information ... it is important to consider the communications and interoperability aspects ...