Ah yes, but I did email them and got...well some information back, saying something along the line of a bigger PSU is not necessarily the best. The peak current of the motor is probably stall current, although I was under the impression that the motor will pull whatever current it needs and you need to provide protection in order to limit that and not fry stuff in the line (so for example stick a fuse in line). The driver can only supply 18A, so that's the first limitation, although I'm not sure what happens if you put a motor which wants 25A on it's end. The other limitation will be the PSU, again protected by it's internal elements and / or additional inline fuses. Teoretically I can use a smaller power supply which is capable of delivering the nominal current, but in case of peak demand it won't deliver more than nominal current, so the driver / servo won't perform very well or a fuse will go 'pop'.

I'm simply wondering what people use for servos, when the servo has very high peak current. Do you simply pick a bigger servo for the application to make sure that normal running conditions are met by the nominal current / torque and pick a supply capable of delivering only nominal current, ignoring peak demand?

Regards,
dsc.