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Re: spark controller dropping voltage in reverse
We found that measuring the voltage with a DVM on the Victor speed controllers was unreliable because of the square waveform. Ours had a similar issue where the forward voltage looked like maybe 3 volts at a low speed and the reverse voltage at the same speed looked like 0.2 volts on the DVM. Clearly the motors were moving and we actually had a mentor look at the signal on an O-scope to measure the pulse widths instead.
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