The Wiring Diagram

A project log for Upgrade Budget Laser Cutter

I have a laser cutter from China, similar to the K40 (50W 4060) it works out of the box but the software stack and UX needs work.

JoeJoe 04/28/2019 at 11:450 Comments

I have gone through the wiring and sketched it out. I also took out the laser power control board (the one with 888 on it) and pit it in a logic analyser. The IN pin sends a 22.22kHz PWM with a duty cycle that more or less matches what is shown on the display. The K- pin is pulled up to 5v normally and to ground when the test button is pressed.