Thank you all! I Attach my design and you could see pots beside the neck and on top of head motor. I'm thinking may be good idea to double pot per motor, then feed each pair to a filter and get rid of error, then try a PID (don't have skills for).
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Zoomkat,
I'd study the search, sure I must know in detail the internals of servo and hope it ends to learn to hold the load with dc motor.
PeterH,
There's nothing stopping you from putting a feedback loop on your motor control
Well, unfortunately what is stopping me is lack of skills in control theory: I've not done the homework, not finished a single control theory book (but have chosen what to read, it has matlab simulations to pass to hopefully couple theoretical understanding with some intuition). I'd give a try to the PID lib you kindly suggested but hardly imagine that in this concept any good result comes without sound theoretical background and gained intuition in putting them to work.
DVDdoug,
I want to create a friction device but have nothing to start from other than my own idea. I learned that better to find examples of others, before realizing own idea, so not to reinvent the wheel. I don't know any similar project or what to google for. If you got something, please kindly leave me some links.
Dhenry,
I have a small experience in feedback: I used an IR-range finder sensor and programmed it so that:
- servo on which the sensor is installed, turns right all the time until detecting an object
- when detected, servo turns to left edge of object until losing it, back to 1.
The result was not bad: robot could follow the object by edge.
I think with pots on the neck I'd have the same story: motor turns toward set point and sure won't stay on it but pass it over, then returns. The error of pot will make problems I think.
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Design:
