I’m surprised a mainboard change is required at all, to be honest - if it works in one software, but not another, it’s almost certainly a firmware issue. We’ll wait to see what Commarker says, and we’ll relay the solution as soon as we can.
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I wonder if it’s related to a change in hardware. Now they are advertising 6 and 12 on the site. I’m emailing them to know more about that as I just got this thing, ridiculous.
So I am not saying its not YOUR motherboard, but I just setup my Omni-X which we purchased as a test machine with their rotary and it seems to be working in my tests.
You can also access the correction values and rotary settings from Commarker Studio in the Device Settings menu. The password is 123456…
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Thank you! I will try and report back!
I just tried with thouse settings and got random results. Inconsistent. It is better. It starts engraving ok, but sometimes in the middle of the work start engraving gibberish and random spinning. After that, i try the same project , the same material, it engrave whole but with inconsisten lines. I mean distance between mark lines somewhere are spectacular, somewhere are disaster. Can someone check also and see? Thanks a lot everyone!
Can you share a project file so I can test on mine and post pictures after.
Nothing special just some text all around the botton of the glass. Here is lighburn file. I have success on one glass, but on other, have a random movement and gibberish engraving. on the third one it start perfectly but in the middle start with insane movemnt.
King Roccini Botton Shot.lbrn2 (41.4 KB)
We got another Omni X, and I ran some rotary tests.
The stepper motor barely has any torque and briefly turns off in between the slices.
It worked well with a light Sharpie if it’s mounted perfectly axially in the chuck.
But not with a heavier glass! It showed the same, seemingly random, gibberish movements.
With this heavy, unbalanced hex wrench, you can see the issue:
The controller board seems to use a more modern stepper driver like the TMC 2209, which sets the motor vRef current, and the step timings over UART in the software.
If we can acquire control over this, that should be an easy fix.
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Thank you so much verifying that i am not crazy (i started to doubt myself 
)
Motherboard from commarker is on the way to me, so if you manage to fix it in lightburn before that, I would appreciate not to pulling the cables from brand new machine
Understandable, we don’t want that either. We’re digging into it as time allows.
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Just jumping in to mention I have the exact same problem as OP. I have the Omni X 5w along with their rotary. Works (mostly) fine using the Commarker Studio software. I say mostly because no matter what I do, I end up with consistent tiny “skipped” lines when engraving tumblers. So I downloaded Lightburn and followed ComMarkers guidance on adding both the Omni X and the rotary tool (although their manual insists steps should be 12800, when in fact to only get one rotation in Test steps should actually equal 3200). Flat engraving works fine. Rotary tool seems to get the results as OP - I probably engraved “Hello” 15 times and got 15 different results. The only difference in our situations is that I have not contacted ComMarker about potentially needing a new motherboard. Seeing as I’ve had the tool 10 days or so, I hope that’s not needed. Thanks and let me know what info you need from me if I can be any help solving this
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Hi Brian, we’re still getting an understanding of what’s going on with the rotary stepper driver not holding rotation between slices.
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Confirmed the same here as well. Commarker says “The second-generation motherboard comes with an external driver fluctuation switch, which can resolve the rotation problems in LightBurn engraving.” Looking forward to seeing someone perform the motherboard replacement process at this point. In the meantime just using the studio software for this until resolution.