The biggest problem with any of those modules is that they can't dissipate enough heat to let you run any but small motors at rated torque. Add an easily broken current setting pot (and who knows how much current you'll actually get when you twist it?) to it and you have a perfect recipe for an unrelaiable printer.
45V NEMA-23 motors? Sure, if they'll deliver any torque at the very low current that thermal dissipation allows in this module. Take a look at a DM860 driver module for CNC machines. See that heatsink? It's not there because it looks nice.
"real" 256:1 ustepping offers the "advantage" of requiring a 16x greater pulse rate to drive the motor at the same speed as a motor being driven at 16:1 ustepping (or using interpolated 256:1 ustepping). Calculate the maximum speed your controller can deliver at 16:1 ustepping and divide it by 16 if you use this module at 256:1. ooops.
At 256:1 this thing can't go fast enough for a 3D printer (OK, it would be fine in the Z axis) and it can't supply enough current for a CNC router or mill.
45V NEMA-23 motors? Sure, if they'll deliver any torque at the very low current that thermal dissipation allows in this module. Take a look at a DM860 driver module for CNC machines. See that heatsink? It's not there because it looks nice.
"real" 256:1 ustepping offers the "advantage" of requiring a 16x greater pulse rate to drive the motor at the same speed as a motor being driven at 16:1 ustepping (or using interpolated 256:1 ustepping). Calculate the maximum speed your controller can deliver at 16:1 ustepping and divide it by 16 if you use this module at 256:1. ooops.
At 256:1 this thing can't go fast enough for a 3D printer (OK, it would be fine in the Z axis) and it can't supply enough current for a CNC router or mill.