I was using my K40 with its stock controller and K40 Whisperer to cut solid vector patterns into wood and getting great results. Since switching to a Mini Gerbil board and Lightburn the quality deteriorated a lot. I discovered this was a result of the default PWM rate, which is optimised for grayscale.
Every time I increased $28 I got better results until at $28=14 I get no output. Nothing beyond 5 or 6 was documented in anything I found, but I’ve since seen that the max value (15) is 80KHz, with 13 being 45KHz.
Some forum posts suggest that 20KHz is the max rate you should run a CO2 tube at, although the Trotec site suggests 60KHz.
Can any offer some insight to this? I’m worried about damaging the tube and would be interested to know more.
Many thanks, Tom