Hello Don, thanks for all the knowledge you are sharing.
I tried doing my own wiring, but something its wrong. I can set the desire power manually by adjusting the pot, but when i sent the command on the K40 whisperer to raster engrave, I do not get enough laser power on the material.
(Tube, LPS, PSU, Pot, Switches, M2 Nano board, Laser Tube, Digital Voltmeter are brand new).