Hi guys, Finally got all of my electronics sorted out and wired up my electrical cabinet, now just trying to tune everything nice and noticed something weird.
I'm using the 0-10v output from the G540 from SmoothStepper PWM and feeding it into a KBMM-125 DC motor controller, the motor controller has speed pot input, with the high side at 12v, I turned down the max speed pot so that it maxes at 10v like G540 asks for and then fed the 3 wires into the G540. I'm able to control my spindle rpm now and thought all was good...
However today I noticed that the output from the G540 is not linear for some reason, I put in an rpm of 1000 and when I measure the output voltage from the G540 on pin 8 it's at 1.66v, but at 2k it's at 2.8 and at 600 it's showing 1.1, totally not linear. Is there some sort of adjustment I need to do to the G540? or is this mach acting up?
I guess next step I'm going to put a scope on my smoothstepper output to make sure that it's generating a proper PWM signal width.
Currently I have my SS configured for PWM with a frequency of 2000, in spindle setup for mach3 I have base freq set to 50. In spindle control I have tried all different speeds and there seems to be no effect at all. And in pulley settings I have my min at 0 and max at 12000 with a ratio of .4 (My motor has a max rpm of 30k and is geared 1:4).
I hope what I wrote isn't confusing.