Best posts made by gershb0mb

@jay_s_uk Thanks for your input, yes those are the two options I am deciding between.

@jay_s_uk said in Upgrading CNC to Duet 3, keep or replace existing motor drivers?:

Cons going against you here is you may need some fairly significant cooling to run the built in drivers at ~5A.

I completely forgot to ask about cooling in my initial post so I am glad you mentioned this; the existing drivers are attached to a pretty substantial heatsink and if the Duet would also need extra cooling it would definitely make the replacement a bigger project.

It sounds like the 6XD is the way to go then if there are no big advantages to the drivers that the 6HC uses over the existing ones.

@T3P3Tony I would think that I could get at least double that speed for travel moves; as I understand it that is currently limited by the LinuxCNC controller and not by the motor drivers. I will have to check the current settings and the motor gearing though to be able to answer your other questions.