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Unread 12-08-2013, 06:07
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Um, I smell Motor!
AKA: Scott McBride
FRC #2137 (TORC)
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Re: Tank Drive Without a Microcontroller

Quote:
Originally Posted by cad321 View Post
Did you make sure to re-calibrate the Jag (I haven't used a victor before so I am unsure as to what is necessary for them). If you go on the vex website they provide documentation on how to re-calibrate the Jag for different pulse width ranges. We had the same issue where the Jag would only put out 50% power when we used a servo controller on a test board we built. Once we re-calibrated the Jag with that servo controller it worked perfectly. Just make sure that you re-calibrate the Jag once it goes back on the robot.
We did try to calibrate the victors, and it improved, but still not ideal. The servo tester we have would go almost full speed in one direction, and about 1/2 speed in the other direction. We were using this to prototype the shooter last year. I ended up using an arduino, the ardunio servo library, a little code to convert an analog pot to servo pwm output. It worked fine for both Jags and Victors out of the box. (not sure what the difference in the inputs are, I know you declare the controller type in labview, so would suspect there is some difference, but did not notice it on the arduino.)
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