Hi! So, has anyone else experienced the auto-focus to be very wrong?
I’m working with some hardwood that’s roughly 3/16" thick. It calipers in around 0.2" and when setting the material height to 0.2" it aligns nicely.
Now, at first, it cut and engraved wonderfully and as expected at that focus height. But now, it cuts and scores incredibly BOLDly. When setting the focus height to 0.12" it seems more in line with what a cut should look like.
Also, when I click Print and it auto-focuses, the image changes and shows very misaligned compared to what it showed before. This leads me to believe that the auto-focus is way off base.
Two things I’d look at. When using set focus watch the laser head and material to make sure that the red laser dot lands on your material surface and not in a hole or otherwise off. The other is to run the camera calibration if you haven’t already; it’s the best way to get an accurate image. It often needs to be run again if the machine has been moved since the last calibration.
The calibration of drawing 100 's? I was wondering if that was supposed to help with the focus height. Maybe I’ll give it a go.
This seems to have just suddenly happened. Maybe after I had tried wiping the lens? I’m not sure though, as it’s possible I tried wiping the lens after some cuts weren’t working right, which could be because of this issue.
The camera calibration process is strictly for aligning the lid and laser head cameras, so that designs can be placed to within 1/4" accuracy on the bed image before printing.
If that alignment shifts when using “auto focus” vs. manual material thickness, then the calibration is likely off and needs to be reset using the calibration process.
None of this has any effect on the actual focus height during printing. That is calibrated at the factory.
The only exception to all this is if your laser head is defective and the head camera is not determining material thickness correctly (out of calibration), in which case the machine would need to be repaired or replaced.