Quote Originally Posted by john swift View Post
looking at the supply voltages for the AM822 the stepper driver has a simple linear power supply built in side
(bridge rectifier and capacitor) so you can either connect it to an AC transformer or
a DC power supply
Only the "H" series have this option. the common AM882 is only DC.

Quote Originally Posted by m_c View Post
Something that I've often wondered about the AC capable drives, is just how well can they handle fast deceleration?
The cheap ones with AC/DC options don't handle it very well at all in my experience but better ones which often only have AC option I've never had a problem with. Much prefer to use DC supply with Caps on a fast router with decent weight gantry.