[dawilliams]

I have used Victors with Y-cable to synch the PWM input to each Victor and never had a problem. This was with much higher current than Victor 884. IFI lists max currents for Victor 885 for 1 and 2 seconds. Since none is listed for Victor 884, where are some of you getting this over-rating info for the Victor 884? There are other threads that discuss burning Victors in matches (not just reversing polarity) which does indicate some teams are drawing too much current for some time. And defensive bots do push for quite some time.

I like the analysis done by Joel J (team 229) but I suspect the problem may lie in the desire/need for speed higher than 6.2 fps (that's less than 4 mph ie medium fast walk). Then a similar analysis would show the wheels don't slipand higher current would be expected. I also think the line:

"When you reduce the free speed of the CIM motor (5310 RPM) 22:1, you get a final RPM of 239.245, which translates to a ground speed of 6.2634 fps"

should use the motor speed at the load equivalent to 40A current, not the free speed.