Thanks @Todd_Fleming
“I got the best grayscale results around 2000Hz and best cutting around 5000 Hz”. dang it. This means we need a way in gcode to set PWM frequency to get the best results. @Sonny_Jeon any ideas for a way to control this? We probably don’t want a gcode file which mixes cutting and rastering to have to play with $ settings. Is there a reasonable letter we could reuse like we reused S for laser intensity?
I just put out a new grbl-lpc release. Home switches were on wrong ports. It now has 4 .bin files: a mix of (P2.4, P2.5) and (2 kHz, 5 kHz). https://github.com/gnea/grbl-LPC/releases/tag/beta04-v1.1f
It’s on the development list, along with Claudio’s servo stuff. You’ll need a new setting ($33) or use the laser mode $32 setting as an integer, rather than a boolean. The latter option could support several preset modes of the value is greater than 0.
I suppose you can also do it through gcode too. It’d be advantageous for integration into a CAM that supports it so you can get optimal cuts with a job that involves different scenarios. I’m open to it but not sure of the best way.