AC Adaptor?

[Al Skierkiewicz]

Squirrel,
The stall current for any motor is the start current since a motor that is not moving is by definition in stall. With no load the current spike is rather short and for this motor, the stall current is only 42 amps even though the no load is 1 amp. (from the Banebot website) Even a motor with a transmission that is not connected to anything still has some loading so it is likely that the computer power supply would not be able to start a motor coupled to a transmission. The caps in the output of your supply are the part of the power supply that is delivering current during that critical startup. If the current demand was higher or the value of the output caps were lower, the result would not be the same. What would be interesting is looking at the power output on a scope when you start the motor. This should show a significant drop in the output during the start time of the motor. The Chalupa motors are much higher current having 129 and 133 amps stalled respectively, as I remember. Run current, no load, is a little higher but the big difference is the amount of mass at start compared to the Banebot RS540. The armature of the larger motors may weigh more than the whole Banebot motor.