by sliptonic » Sat Dec 31, 2011 7:25 pm
I've managed to get my driver board mostly working. Homing, motors, limits, safety, all work great. I'm also firing the laser. Of course, to paraphrase The Princess Bride, "Mostly" working is slightly not working. Specifically, I can't seem to control the laser power at all.
My front panel POT reads between 0 and 5V between the wiper and ground (regardless of whether the POT/pwm switch is open or closed) and the switch itself appears to be working(5V on pin 6 when closed). But changing the position of the POT has no effect on the laser output as far as I can tell. Regardless of where it's set, I read 1.71V on the IN terminal of the laser PS.
I'm sure I'm missing something simple but can't seem to spot it. Any ideas?