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Driving a laser via PWM

Posted by 3Derping

3Derping

Driving a laser via PWM
March 28, 2015 11:59PM

Registered: 9 years ago
Posts: 11

I would like to switch on and off a laser via the fan speed control "M106 S***" gcode. What pin does the arduino use to signal the mosfet connected to D9?

Much thanks in advance.

Edited 2 time(s). Last edit at 03/29/2015 03:01AM by 3Derping.

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cdru

Re: Driving a laser via PWM
March 30, 2015 09:49AM

Registered: 10 years ago
Posts: 869

Quote
3Derping
What pin does the arduino use to signal the mosfet connected to D9?

D9 stands for Digital 9, so pin 9. Pretty creative with their naming, huh? smiling smiley

You should be able to use M42 Px Sy where x is the pin number (9 in your case) and y is the PWM value 0-255.

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3Derping

Re: Driving a laser via PWM
March 31, 2015 02:03PM

Registered: 9 years ago
Posts: 11

Oh that's is great. Thank-you very much!

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3Derping

Re: Driving a laser via PWM
April 05, 2015 01:43AM

Registered: 9 years ago
Posts: 11

And... I've hit a snag. I'm getting disconnected from USB control when I use MI06, sometimes.

My setup is very simple: I have an LED connected between the arduinos digital 9 pin and the ground pin. When I issue the M106 gcode, the arduino and LED stay on, but, about a quarter of the time, the USB connection is broken. What gives?