Thanks for the reply Gary. I might be running well below the nominal torque, which means I'll never get above nominal current either. As I said before, the motor is overspec'd for the purpose, which is one way of getting out from having to buy / make a massive DC PSU. Surely the AC system with a built in supply will have limitations as well, won't it?

Am I correct to think that in heavy duty applications the PSU current capabilities are based on the peak current of the motor? that indeed means massive motors for the bigger servos, which can get up to 80A peak or more.

Regards,
dsc.