I previously posted this problem some months ago and got no replies. The problem is progressively getting worse. You can see the actual burn compared to what the console says it printed. The belts are tight and I reloaded Lightburn. I would like an answer to this or a suggestion for another program that might actually work.
What kind of laser is this? Your profile says “2 watt hobby I rebuilt…” How did you tune the motion settings in the controller? (acceleration, idle speeds, etc)
It looks to me like the motors are skipping badly while trying to run those vectors. How large are the motors, what current are you running them, and what speed was this run at?
One commonality that you’ll see for new Topics that don’t get replies is that there’s insufficient information, context, or clarity for someone to feel confident enough to respond or feel like they can contribute something to the dialogue. Keep in mind that this is a community forum.
For a higher chance of success I suggest taking on a “push” mentality where you’re taking on more of the burden of conveying the problem statement, laying out symptoms and the context, and requesting the necessary help that would alleviate the problem. There are certainly members here that will take on a “pull” approach to help but it’s less common and frankly much to ask.
@LightBurn has asked a number of good starting questions to help diagnose.
What led you from the first statement to the conclusion that this was a software issue? Under these circumstances I would assume the “obvious” answer would be that there’s something mechanical or electrical that’s gone amiss. Are you noticing something specific that makes you think that the software is degrading?
What version of LightBurn are you on?
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I found the answer in the document at: Configuring a Ruida - LightBurn Software Documentation . I had to uncheck the “PWM rising edge valid” box. It seems to be working perfectly now. Thanks for replying quickly to my question.
This is interesting Dan! Thanks! - I might be changing a GRBL controller on an engraver in the next few weeks. Did you change any of the speed and acceleration settings or just the PWM rising edge switch?
Just PWM so far. The machine jerks quite a bit so I presume the acceleration affects that.
That PWM issue is typically much more visible when engraving - it produces a slanted output. If you had run an engraving it would’ve been much more obvious. I never think of it when looking at vector runs, but of course it affects those too.
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