Air assist relay wiring

Machine: k40 nano

Board: laserboard

Firmware: _Smoothie or GRBL-LPC? Grbl

Problem/ Question: when wiring this relay do you use the 24v screw or the 5v pin on the board?


Either will work, but I’d use the protected 24V out in this case (anything that interfaces with line voltage should be optoisolated, IMO).

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