Camera use with Snapmaker A350

[chrisvn (Chris van Niekerk)]

Hi

Has anyone successfully used a camera with a Snapmaker A350?

I bought an 8MP USB camera for this and have gone through the lens calibration as well as the alignment procedures as required. Points 1-4 marked ok. All the scores with lens calibration were <0.3.

I have a clear picture of the overlay in LB, but if I align an object with the overlay, it is about 90mm off in the Y direction and a small distance in the X direction. I know you can shift it in the camera controls, but this offset indicates to me that something is wrong.

I suspect the work origin setting on the SM UI has something to do with it but cannot seem to get it right.

So, my questions are

• Where should I set the work origin when doing the alignment?
• Should the work origin be in the same place when using the camera after calibration?
• Any other tips to calibrate or use the camera successfully would be appreciated
• Slightly off topic but has anyone found a way to make the “Get Position” button work correctly. (I believe LB expects a GRBL response, but gets a different response from SM)

The camera is mounted on the roof of the Snapmaker enclosure, as close to the center as I can get it to clear the toolheads.

Any help will be appreciated.

Regards

Chris

[Aaron.F (Aaron)]

@chrisvn

Where should I set the work origin when doing the alignment?

The “Start From” value should automatically change to “Absolute Coordinates” when doing a Camera Alignment.
I’ve also heard that this has been omitted in a new version.
If that’s the case, set the value manually to “Absolute Coords” beforehand.

@chrisvn

Any other tips to calibrate or use the camera successfully would be appreciated

@Aaron.F

Please follow the instructions for camera calibration with Tracking to see if it solves it for you too: Calibrate Camera Lens (Labs) - LightBurn Documentation

This feature is still in testing (Labs feature) but is currently the most precise way to calibrate your camera. It’s only accessible with a right click on the “Camera” window:

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After this, perform another Camera Alignment as usual: Calibrate Camera Alignment - LightBurn Documentation

[chrisvn (Chris van Niekerk)]

Hi Aaron

Thanks for the feedback.

It does automatically place the start from in Absolute Coordinates. That part is ok, but once the calibration has been done, I think my problems begin. Since the Snapmaker laser bed moves in the Y direction, The camera no longer has the same view of the job/placement as it had during calibration. It also seems to work from the Work Origin that is set on the Snapmaker and not the real Absolute Origin. There is something I am missing in this regard ad I am trying to figure that out.

I will try the lens calibration with tracking when I get a chance.

Regards

Chris