Did you make use of the instructions i put in the following posts to measure the SPINPWM output with a digital voltmeter? You can measure with the laser unattached. If you see similar results the LM controller is OK. The second post shows commands you can use to control the laser and run the tests right from the UGS command line.
@Kyfe and @gwilki , you can check the output by measuring its voltage with a multimeter. You will get different results if you measure DC vs AC, but you can still tell.
The output is a PWM signal (Pulse Width Modulation). The signal ranges from about 0V to 5V. Off would be 0V and full on would be a steady voltage close to 5V. For intensities in between the signal will be a series of pulses. At low intensities the pulses will be more off than on (lower duty cycle) and at higher intensities the …
No. Set $31 to 0. This is minimum spindle speed. Set $30 to 1000. This is maximum spindle speed. You can actually set $30 to whatever you want. Scienci recommended 100. I chose 1000 because I thought it gave me greater resolution. Once set you leave these alone.
From the UGS console use the following GRBL commands:
M4 - turn on the laser
Sx - set spindle speed.
M5 - Disable/turn off the laser. (Your gcode will only use M5 at the end and will use s0 to turn the laser off while engraving/cutti…