Recently upgraded my machine as far as belts and Z setup. Followed directions and reset the machine via easel. I’m assuming it’s trouble with grbl but when filling an image with lightburn, it doubles everything. Xcarve 1000
Can you attach the .lbrn file for review? This is a little odd.
I can tonight or in the morning. But I’ve re created the file atleast 10 times today . It’s only doubling in one direction. Even if I do font and set it fill, same result
In which direction is it doubling?
Are you getting this with lines as well or only fills?
Only does it when using fill. And it just doubles side to side. In the original picture It looks like the duplicate star is to the right.
It’s possible that you’re getting some severe offset scanning.
Take a look at using offset scanning adjust in Device Settings:
More information in the documentation:
Scanning Offset Adjustment - LightBurn Software Documentation
1 Like
Double check your belt and wheel tension. Remove any slack from the belts. Belts should be taught but not overly stretched.
Make sure wheels are not overly tightened against the rails.
Double check that the grub screws in all the stepper pulleys are secured.
Can the laser head move freely and smoothly to all corners of the machine? It should take very little effort to move.
1 Like
Everything was secure. I’m going back through the whole machine now because the now I feel like it’s some sort of alignment issue due to how lop sided the stars are?
What do you mean by alignment in this case?
Based on the way the lines are being skewed I would say this is very likely something mechanical. Especially when you couple that with the way the engraving works. You might want to try engraving with scan angle at 90 degrees to see how that changes the artifacts.
Also, try dramatically slowing the burn of the line stars. If it changes how it looks then almost for sure mechanical.
Also if I turn bi-directional fill off, the double image goes away
So it’s almost like the it’s just tracking the incorrect positions when going back and forth
If you cut the engraving speed in half - is the error roughly half?
May be slightly less noticeable but I wouldn’t say half.
If speed affects the outcome then again, likely mechanical. Recheck everything:
- belts
- pinion slippage
- wheel gap
- smooth movement
If moving the laser head around can you feel any backlash, binding, or anything that would indicate that you’re not getting consistent movement?
This could be either something mechanical in which case this could be the same issue you’ve been dealing with on the lines… or a separate issue with offset scanning. Right now I suggest focusing on the mechanical issues.
If we assume for the moment this is a mechanical issue this would imply somehow missing steps on the X axis. Focus your search for something on the X-axis. You could also be missing steps due to too high a speed and your stepper is missing steps.
What are your speeds?
Post the .lbrn file here and we can review setting for anything obviously incorrect.
My speeds are only 50-60 ipm. I just noticed a small flex in the belt on the X. Going to pursue that first. And at this point it’s in every file I do
I don’t know about your specific machine but those aren’t unreasonable speeds. Although the xcarve machines I’ve seen do carry quite a bit of weight on the gantry.
If it’s getting progressively worse then almost certainly mechanical. Sounds like you’ve got a good lead now.
I’m lost. It’s missing steps for some reason. Tightened th belt but no better.
check for the belt if there is some missing tooth
Looks normal