I'm seeing a behavior in my RoboClaw 2x7 that I can't explain. I've been trying to manually tune the velocity PID settings (I don't have a windows box so I can't use Ionmc's tuning tool) by using command 28 to set the velocity PID gains, then command 55 to verify that they're set correctly, then 35 to spin the wheel at half of its maximum speed. The problem is that no combination of PID gains seems to make any difference at all. I've set it to 0,0,0 and the motor still spins at roughly the set point.
I must be doing something wrong, but I'm pouring over the datasheet and I just don't see what it is. By all rights the motor shouldn't spin when I use 0,0,0! Any ideas?