Upgraded from a NEMA24 to a NEMA34.
Before going out and milling or buying it in metal it is always a good idea to testprint it.
Probably will use the plastic part for a while as 3mm wall-thickness PETG seems might already be good enough.
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Not bad either.
Previously I had a 1.85Nm on this axis which wasn't enough to reliably pull 1'500 mm^2/s acceleration milling metal. All sort of issues from overheating stepper driver to it losing steps.
Yeah I used these in my manual mill converted to do power drive and some basic CNC stuff. They are excellent and have a lot of torque, but they are also very slow. Especially with the amount of step down gearing in a manual mill, the end result isn't very fast. But I don't really care, I'm usually not in a rush to do anything.