What is your setting for S-value max in the Device Settings window? What is your $30 GRBL parameter?
HirokoAuthorThanks for your prompt reply! As I mentoined, my current settings is: $30=1000.000 $31=0.000 $32=1 S-value max in the Device Settings = 1 000 $30 GRBL parameter = 1000.000 Here is pics:
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From an electronics point of view and rounding the numbers: 255/1000=25%. 25% of 4.5v (5v source) is 1.125 volts. It appears the PWM matches the S value pretty well. So… Go back and check your settings. Many including myself found it is easy to change a setting we did not intend to change. 1. Make sure you are using mm/min in the Settings window (Units & Grids tab in v1.7.x). 2. Check the power % setting. 100% can cause overheating in some machines. 3. Check the speed setting. 4. Make sure the focus is set right (this one gets me a lot) 5. Confirm all the cables are securely in their sockets. 6. No change in material while testing. Let us know the results of your review. The only other thing not in my list is the laser head going bad, but we need to eliminate everything else first.
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"Right now PWM is around 0 despite all S commands (0 to 1000)…" This is not good. Do you get the laser to light up using the Fire button in the Move window? If not, try reseating the laser module connector. "didn`t properly cath what means power or speed settings." I was referring to the Cuts/Layers window. But if you are getting PWM always zero, this is not important for now.
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