Hi all - hoping someone can help me fix an issue or at least tell me I’m not crazy.
I recently purchased an OMTech 80w 24x35 CO2 laser with autofocus and Ruida controller. Questioning that decision quite a bit. The laser has some signs of previous use or possibly poor manufacturing (or both) but Omtech assures me that it was not previously used.
Anyway, the laser will not cut clean lines when cutting or engraving on a curve or in a circle. The lines have some significant wobble that is clearly visible to the naked eye. The wobbles are there regardless of the speed and power, though they’re less noticeable if it’s below 15 mm/s. I’ve already tried checking all of the set screws and the belts are tight, but not too tight.
I called OMTech and had to pay $49 to talk to a technician for 45 minutes. We walked through a whole bunch of trouble shooting steps that I’d already tried (set screws, belts) and they said it must be a software or settings issue. First they said it must be lightburn and I need to try another software, but I only have a MacBook and I don’t think it’s a software issue anyway.
Then they said it must be a settings issue so they sent me new settings and asked me to load them and try again. I did that and the wobbles didn’t go away. Then after they failed to fix the issue their solution was to tell me that wobbles are normal. They said they did some test cuts on the machine in their office to make sure and that they had wobbles too. They said I should try engraving below 15 mm/s.
So I need some expert opinions. Is it normal for straight lines to be perfect but for curved lines and circles to be wobbly? Is 30 mm/s too fast to engrave curves? Is 5-15 mm/s a reasonable speed for engraving or is OMTech just not able to figure out how to fix the problem? Am I overreacting and these wobbles really are normal?
The examples here are cut at 30-35 mm/s.
Note that I’ve read through these 3 forum posts and have tried their suggestions but have still not been able to fix the wobble.
Thanks for the help! Please let me know what questions you have.