@dc42 said in Using Duet 3Mainboard with external stepper drivers:
@mpentenr said in Using Duet 3Mainboard with external stepper drivers:
@dc42 Are there any news on this topic ?
Not yet. Now that we have the prototype Tool Board, there are two ways we could support external drivers without needing a new main board:
- Do a version of the EXP3HC board with outputs for 3 or just possibly 4 external stepper drivers instead of on-board drivers. This would probably be best for those who are actually using external drivers, not step-servo motors. But we don't expect many people to need external drivers with Duet 3.
That would be my favorite, because of my 2pt100(bed) and 3K-Type Thermocouple (Pellet Extruder) which I cant connect to the tool board or is it possible to use thermo connectors on one board and step/dir/ena on another board for one "axis/extruder"? I also would need 2 of these boards, because of the 3 (X/Y/Z)axis with external drivers and up to 3 external drivers for the (pellet)extruders.
- Do a version of the Tool Board that has a single set of step/dir/enable outputs, to drive a single external driver or step-servo drive. I think this might be better for those using step-servo motors with built-in controllers.
Please take into account, that the Vin for example for my pellet extruder is 48V, when designing the driverless Tool Board with step/dir/ena output.