variable laser power

[pedroh]

I'm thinking of buying one of those cheap lasers ( around 40W). I am wondering if it would be be possible to vary the power while cutting by using the z axis output of linux cnc, by,for example connecting a small stepper to a variable resistor?

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[underthetire]

Just change the control board to a ramps board. It can take g-code and vary the laser output. Lots of info on Google.

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[pedroh]

Thanks, I'll do a search