Has anyone figured out why Lasaur stops abruptly at the beginning of a job? I have noticed it happens when power % is higher than 80, like I can never get it to do 100%, so it has to come down. I tried 90, same issue.
RF interference from the tube being fired. We stopped a majority of the resets by building a metal box around the tube.
Its a known problem that it happens on high power settings. The lasersaur people are looking into remaking the base board for it. We are looking into better ways to shield the board
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does the board have RF shielding around it? Thanks for the info! and is the power coming in to the board filtered at all?
No and maybe
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You might find the video in this link to provide some answers to your questions
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The circuit changes described in the video posted by Walter have been implemented on our Lasersaur and they didn’t make much difference. Also @kbraby built a metal shield around the laser tube which significantly improved the situation. The motherboard isn’t shielded but might be the next step. The power coming into the motherboard has a few capacitors but signals are not isolated and share the same ground. Allen has proposed some design changes to improve the situation but it would basically mean redoing the motherboard and some of the sensor wiring. That’s on the table but not something that will happen quickly if it happens.
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Optically isolating the laser trigger signal might be a good idea, and would allow the frame ground and signal ground to be isolated, or optionally tied together in a way we choose instead of through the laser power supply chassis.
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