24V Laser

[chimaeragh]

I am wondering if I can power a 24v laser directly from the Duet 2 Wifi using one of the heater pins (e1heat). This should allow me to enable and disable the laser power using gcode in my postprocessor and also simplify the wiring of the laser.
The PWM connection would be done using the PWM Circuit board recommended in the laser configuration guide, only the Vin would be taken from the Duet itself, not an external source.

The laser specifications list

• Input: DC 24V, 1.5A

• PWM: 0/3-12V, 0-5kHz

My power supply is a 24V Weiho 350W.

[o_lampe]

@chimaeragh That will work for sure. You can define it with M950 as switch and use M42 or M106 to switch it on/off. But that also depends on your Laser FW, in case you want to enable the laser through Laser-FW.

If you write your own macro for the contact switch (other thread) you could even automatically re-configure your CNC, just by attaching the laser module to the magnets.

[dc42]

@chimaeragh that's not a good idea, because the heater outputs are switched on the negative side. But you could use a fan output to control a relay that switches the positive supply to the laser.

[chimaeragh]

@dc42 Thanks