Originally Posted by
renatopub
Are you going to get a 24V PS later or do you intend to work always with 12V? With the motors I have (1.7A, 11mH, 1.06N.m) I would not be able to turn faster than 60 RPM on 12V. With 24V I should get 0.4N.m at 120RPM for rapid move.
My goal with this board is to CNC my X2 mini-mill. I have the X,Y already fit with a couple of (cheap) ball screws I got from China and ready to go. Just the damn board is missing…
Most people on this forum have the opinion that such a board is a bad choice for powering a X2 mill. They are right that the board (besides being from an unknown brand) is barely in the limits for that job. But it only means that the design has to be well thought through as there is not much margin available for mistakes. I am using a 2:1 belt to double the torque (but half the speed), that means I can get about 1.5N.m at low speeds and 0.4N.m at 5mm/sec. Not a dream of a rapid, but should do the job. Well, maybe I will get bad resonances and a smoking board but I don’t care. I just want the chance to prove that doing a CNC by the cheap Chinese way is potentially risky but nevertheless possible.
What you guys intend to do with your boards?