pic: Reverse Drive

[RyanCahoon]

Originally Posted by Alan Anderson

The problem is the default Victor calibration, which has its neutral point a little higher than it should.

Side note: Another way to fix this that's always worked for me is wiring one of the motors backwards. (wire the Victor's output backwards, not the input)

[AdamHeard]

Originally Posted by RyanCahoon

Side note: Another way to fix this that's always worked for me is wiring one of the motors backwards. (wire the Victor's output backwards, not the input)

I'd learn to calibrate the victors, it's very easy to do, and should be done to all victors each year.

[skimoose]

Originally Posted by RyanCahoon

Side note: Another way to fix this that's always worked for me is wiring one of the motors backwards. (wire the Victor's output backwards, not the input)

That could give you problems with a strict robot inspector. Wiring must comply with the color coding rules. Yes, you can tape over the entire motor lead, but this only simplifies your code, it doesn't eliminate bias. As long as the motors are oriented 180 degrees apart one has to travel in the opposite direction to the other to move in the same relative direction.

[Joe Ross]

Originally Posted by skimoose

That could give you problems with a strict robot inspector. Wiring must comply with the color coding rules. Yes, you can tape over the entire motor lead, but this only simplifies your code, it doesn't eliminate bias. As long as the motors are oriented 180 degrees apart one has to travel in the opposite direction to the other to move in the same relative direction.

It should only give you trouble with an uninformed robot inspector. <R48> specifically allows for different coloring schemes on the output of a speed controller because the speed controller does not output constant polarity.

[Jared Russell]

Reminds me of this: http://www.chiefdelphi.com/media/photos/17269

The drill motors we used until 2005 had horrendous bias (around 10% if I recall correctly), so some teams came up with ways to correct for it mechanically.