Buildbotics Forum

Hi, I tried to control rpm on my spindle but it seems that it is not working like it should. I used your settings from the PWM Spindle guide but with a max rpm of 25'000 and min 5000 (according to spindle specs) Now using M4 S25000 gives an rpm of about 10'000 (not 25'000) and M4 S5000 --> 4990rpm a...

Hi,
I am building a cnc and now I'm looking for proximity sensor. Is there any reason why using npn and not pnp?

thx