Just connected a cooling fan to my M90 and have it hooked to D9 on my ramps board. M106 S### only turns on the fan if ###>=128 and any value from 128-255 just turns it on full speed. I'd like to get full variable speed control not just binary on/off. I do have the red wire of the fan connected to the + terminal of the ramps board as well.
Wondering if maybe anyone had any insight or bits of knowledge they could drop on me.
Wondering if maybe anyone had any insight or bits of knowledge they could drop on me.