I have a Chinese K40 I have installed a Cohesion3D LaserBoard I have been using Lightburn and
it has been working fine. After running a couple of projects the laser stopped “Burning”.
“Burning” I will defive burining as the act of the actual laser turning on.
I pause the project then resume and it starts again then stops burning after 1 second.
I pause and start and have the same effect.
I have thought it may be due to over heating so I replaced the water and let the pump run for a couple of hours and tried again and had the same result.
Do you have a way to check the pwm signal to the lps? Such as a voltmeter?
The PWM will usually reflect a percentage of the supply voltage, so a 5v pwm will read about 2.5v at 50% ‘power’.
That’s where I would start.
It’s more than likely it’s either the controller or the lps.
I think you have a TL connect on your lps, that is required to be low for the laser to fire. You should be able to measure any of these…
I’m not that up on a K40…
I have a Voltmeter I have been meaning to install. I will install it today and let you know
I mean a hand held meter to check voltages…
I do have a hand held volt meter. Where would I check this? I wish I was more electrical savvy.
That will work fine, and was what I meant…
Measure from ground on the board to the pwm that controls the laser. It should be the power percentage of 5 volts. 50% power reads about 2.5v…
That will tell you if the controller is telling the hardware to fire.