During upgrading my engraving machine (Chinese so called CNC 3018) I had to do some reverse engendering to do proper connection. Perhaps someone else may find this information useful – so here you go 🙂
Laser itself is distributed as two part set. Laser in aluminium cooling block with fan (and four wires), and PWM/TTL controller board.
Controller board uses this main components:
- XL4003E1 – voltage regulator with input voltage 5V-32V, 4A CC max with 300kHz switching frequency
- IC chip MCP60021 OPAMP – operational amplifier
- Voltage regulator 78L05 – 5V output, 100mA
- NPN transistor D476 61C