Position Control using potentiometer?

[dyanoshak]

Originally Posted by biojae

Is this merely a typo, or does that mean that the jaguars cant use a potentiometer for position control?
BDC-COMM, or C++/Java?

Yes, that looks like a typo. Position mode can operate with either an encoder or a potentiometer.

With regards to you position control problem, first try and download the latest version of BDC-COMM and the Jaguar firmware from http://www.luminarymicro.com/jaguar. The most recent version is 87.

Some things to look at and/or try:

How do you have your potentiometer wired to the Jaguar? The Jaguar's analog port is designed with an internal 1K resistor in series with the '+' connection so that when using an external 10K potentiometer, the voltage range is between 0V and 3.0V instead of 0V and 3.3V. Check out the wiring diagram on page 22 of the Getting Started Guide (linked to on the Jaguar site).

Are you setting the number of turns correctly in the Configuration tab?
The possible set positions range from 0 to <POT Turns>

Are you setting the desired position at a position that is actually obtainable? Move the potentiometer by hand and see what values are read by the Jaguar. You might be trying to hold a position that will never happen.

If none of that helps, upload some photos of your setup and/or some screen shots.

Hope this helps,
David