I have been successfully using Lightburn now for a number of years without any issues. Today when i went to cut a job it would only cut on the minimum set power level, not max. Can someone please tell me how to change this. The controller is a Ruida 6442S. The only way i can get it to cut is to set the minimum to the max for the material and thickness. Very strange. At first i thought it was the laser power supply dropping the power so i changed to a new power supply with the same results. If i change the signal for the laser from low to high it only cuts on quick traverse between cuts, and not cutting where it is supposed to
Did some more testing and it is not inverted power settings. It is only cutting on min power setting in the file, not max power in the file. If i increase min power from 20% to 99% it cuts max power. Changing max power does nothing
Did some more testing and it seems that when the speed is below 16mm/sec it only cuts on the minimum power setting, not max. This must be something new in the latest upgrade as previously it would use the set min and max power settings at speeds down to 8mm/sec
How fast are you cutting?
There is a ‘Jump-off Speed’ in the Ruida that tells it when to start applying an increase of power from the minimum setting
So if your Jump-off speed is 10mm/s and you’re cutting at 8mm/s you will never get more than minimum power. Mine were all set to 20mm/s.
Make sense?
Thanks Jack. I did not know that setting would influence the power setting. I will check and let you know
That fixed the issue. It was set to 15mm/sec. Thank you for your help
I messed that up… Don’t know what I was thinking, but the ‘start speed’ is where the speed is set when it starts… I drop this for engraving on a rotary.
The ‘Jump-off speed’ is what it should have been… Sorry about that… feel like the minds going downhill 
I changed the graphic…
There is lots of settings that work with others…
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