OLM3 engraving tall from one pc, but not another

Hello all! I have an issue I can’t figure out. I attempted to engrave some small emblems yesterday but they came out TALL (they were suppose to be round). So I ran a tall rectangle (100 x 300mm) in preparation of making a Y-axis calibration and instead of 300mm tall it was 338mm. I was going to make the adjustment in the ‘Calibrate Axis’ panel, but decided to wait overnight before I did anything.

I was running the laser from a desktop pc.with LightBurn via wifi. So today before I made the axis calibration change, I decided to hookup my tablet to see if the file prints the same way from a different pc. I ran the file again from a MS Surface tablet also via wifi, but those images came out fine–both the emblems and the rectangle were the correct sizes. So next I shut everythng down (laser, LightBurn and desktop pc), then rebooted (shut down and restart). After the reboot, I ran the files again on the desktop, but as before they came out too tall.

I compared the Machine Settings from both pc’s and they are identical. So since it runs fine from the tablet, I didn’t think I should run the calibration on the desktop pc that would make changes on the laser controller (I assumed it would then affect my tablet).

Any suggestions? Attached is a photo of the images. The bottom (oval) images are from the desktop, the top (round) from the tablet. I rotated the image to see if the issue was with the file, but as you can see it prints tall no matter the rotation.

Laser work area change… I recall yesterday when I pulled up an image in lightburn to work on in the OLM3 that for some reason the work area was too small and I had to change it (from 174 x 170 to 400 x 380). That shouldn’t have affected this issue, but thought I’d mention that i made that change just yesterday. BUT I have both USB and Wifi settings for the laser, and I don’t recall which one I changed (the smaller work area size is for my small Aufero AL1). But that’s the only difference I can say that I have/had between the two pc’s.

Squiggly lines… When I was editing the photo I noticed the lines are very squiggly. They’re smooth in the image file. And when I run the inside graphic as a FILL, the squggling is only in the circle at about 11:00 position. The image is pretty small (10mm dia). So iwhen I enlarge it, the squigging is confined to the upper 10-11:00 quadrant on both the circle and the image. The X-axis belt seems tight–no play. I have that issue on both pc’s, so I doublt the two issues are related. So any suggestion for fixing that issue would also be appreciated.

Thanks…JEB

Sorry, forgot the image. Sb attached here.

Check to see if you have ENABLE ROTARY checked on one machine and not checked on the other.

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Hi Jim, thanks for replying! Sorry for the delay in replying I had to wait until the job was done to check that. And–YES, I had the rotary enabled! That was it!

I should have thought of that–I aways use the rotary with the AL1, but never with the OLM3. So I don’t know why it would have been enabled. All I can figure is that I must have opened the job while I had the AL1 settings up (I had just run a job on the rotary–and why I had to change the bed size).

Seems it’s aways something simple! I was tearing my hair out the other day because the AL1 kept running out of bounds.I finally realized because I was using ‘Absolute Coodinates’ for the ‘Start From’, the vertical line I pulled over to register the image had moved the laser position (the green square) off the board and the laser was trying to chase it. ARGG!

I also resolved the squiggly lines issue by lowering the speed. I was using 2,000, and bumped it down to 500. That 11:00 quadrant is the where the laser starts and stops.

Thanks again!

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We have all done similar, or are destined to. Part of the laser brotherhood :grinning_face:

Glad to know you got it going on.

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