If I just fill everything is fine, If I just cut everything is fine, if I cut then fill it’s off by a quarter inch. I have setup and tested the rotatory according to the instructions. (it’s a Longer roller). Origin is set to current position.
Any ideas.
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Yes, you’re using a roller rotary. The tumbler (or whatever it is) is slipping when using line mode. The change of direction and speeds is causing the issue. I never recommend using line mode on a roller. You don’t see the issue when you only do one operation because there is nothing to compare to.
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That makes sense, but I have slowed down the line cuts to 500mm / min and it is still happening. I do see that the movement when not cutting is fast, where do I set a limit for speed.
I don’t think you can go slow enough to get a great result. It’s just how it is with the direction changes that line mode requires. I also imagine that between the layers the rotary reverses back to start position. This is usually a high speed movement as well which adds to the problem.
You could possibly play with acceleration settings and max speed settings, MAKE A BACKUP FIRST.
Thanks for the input, I will continue to play.
Are you trying to get a small outline with a space around your fill? Do a small outward offset (0.1mm) on the line layer and then change it to the same fill layer. This will give you the outline without the direction changes of a line layer.
The idea was to make a cleaner line around the outside.
In that case maybe look into scanning offset adjustment to clean up your engraving.
So I went back to non rotary engraving and cutting, same problem. Engraving went fine, then the cutout was off by just as much as it was with the rotoary.
Can you upload your Lightburn (.lbrn2) file?
So I went back to non rotary engraving and cutting, same problem. Engraving went fine, then the cutout was off by just as much as it was with the rotary.
EDIT, the problem is gone if there is no stopping between engrave and cut.
current.lbdev (3.8 KB)
Attached
Sorry, my network adaptor croaked today and I did not get to switch in my other computer. I will download the LB file tomorrow.
In the meantime, you gave us a clue.
Are you still set for Current Position? Except when using the rotary, you should always use Absolute Coords.
What type of coordinates you use kind of depends on how well you understand each of the systems.
I only use absolute when I am cutting jigs, otherwise I have user origin selected.
For someone new to lasers and Lightburn, Absolute Coords gives the closest correlation between the drawing position and where it will burn on the table. User origin requires a detailed understanding of coordinate systems. This can be a roadblock to new users.
The file extension for your work is .lbrn2.
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