Calibrating Problems with Commarker Omni X UV Laser (Galvo)

[klaus_kraemer (Klaus Krämer)]

I did this 9 point calibration run with my new Commarker Omni X for the 150 mm x 150 mm lens.

After measuring the calibration lines and automatically setting the new parameters, the output is way too large. So I tried a smaller 50 by 50 mm square, which comes out with 61,38 by 61,38 mm.

So I began scaling manually. I got it so far that the x- / y-lengths of a square had the exact length.

This resulted in bulging. I adjusted the bulging parameters and got straight lines. As a result the side lengths of my (now 130 mm test sqare) shrunk to about 128 mm.

So

1. Does the 9 point calibration result in erraneous scaling factors?
2. If calibrating manually: Is there a certain order of the particular parameters to cause no side effects on formerly found parameters?

Thanks in advance …

[Colin (Colin Worobetz)]

Hey there, sorry for the delay in a reply here. It’s a very new machine that we’ve just recently got a couple of in-house, we’re walking through the calibration and setup ourselves (and we’ll be suggesting some improvements to Commarker in that regard).

I’ll set up my 150x150 lens soon and have a reply for you then.

[klaus_kraemer (Klaus Krämer)]

Thanks,

I got an acceptable calibration manually with lots of trial and error.

With both lenses, Lightburn calculated quite erroneous results, when I used the 9 point calibration feature. In essence there had been resizing factors way greater than 100%, when they should have been around 90%.

It’d probably worth further testing the 9 point calibration feature with the Omni X, if you can reproduce my results with your machine.

Also being a newbie with galvos, I had to struggle with the parameters for bulging, slant and trapezoid, which seemed to have sideeffects between themselves. But firstcof all it would be great to have help pop up with a graphics showing which change of parameters (lower / higher) has what effect. I had to make screenshots of your ancient (helpful, but not really up to date) video at youtube to be sure I chose the right direction …

Best regards

Klaus

[Colin (Colin Worobetz)]

I did the 9 point calibration last night and also got a scale that was out of whack. Will be investigating as soon as I can.

Galvo calibration is a very dense topic, and we’ll be the first to admit we want to have a smoother new-user experience, and we’re working towards that as fast as we can.

[gazinggod (Will)]

I have the 10w omni x with comes with the 250mm Lens.

Managed to get it pretty square, but there seem to be a scaling issue.. This is on v2.0.04 and ComMarker Studio.

[klaus_kraemer (Klaus Krämer)]

I don’t know whether it helps other Omni-X users (5 Watt UV Laser), but maybe this can serve as an orientation for calibrating:

Omni X 70x70 lens:

Omni X 5W 150x150 lens:

And the screenshots I took from the (“medieval”) LightBurn Video: LightBurn Galvo Lens Correction Guide (YouTube)

[Aaron.F (Aaron)]

The values for Bulge, Skew, and Trapezoid should be correct after the 9 Point Correction

Apparently, the scaling value is then incorrect. (We are looking into this)

I have found that this can be corrected by calibrating the galvo mirrors afterwards:

@Aaron.F

To fine-tune only the Scale values for more accurate dimensions, you can do the following:

• Engrave a rectangle of 100x100mm (You can use the black paper)
• Open the Device Settings and click on the three dots next to the Galvo 1 “Scale” field:

That’s your Y axis when looking at the G2 with the stand on the left side!

• Measure the height (front to back) of the engraved square with calipers or a ruler and enter the value in the “Measured size” field.
• Klick OK and repeat the same for the Galvo 2, X axis.

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@klaus_kraemer

If calibrating manually: Is there a certain order of the particular parameters to cause no side effects on formerly found parameters?

Changing only the scale should not mess with the other values!