If it were consistent, I would suspect a bent rod, temp issues, bad filament. But it just seems to magically fix itself after a certain layer height…
https://drive.google.com/open?id=1ZfRkdU3muKtuUxQJRMHDqR1hrnQLpuJZQA
Thats the result.
I do see an excessive drop on the platform between some layers… As I watched the cube print I could see it drop more in some layers and less in others…
Makerbot 5th Gen. 215 temp, 200 micron, 10% infill. everything else standard.
This is my second Makerbot, Bought it second hand. The guy said he lubed the rods for me, not sure what he used. Tried wiping off whatever he applied and added superlube ptfe, no change…
Have you run the model file through a fixer just to make sure there are no problems?
What slicer?
What is the inside of the model like? Is there a change in the walls or fill or is it a hollow or solid cube? What does it look like in the preview?
Thank you so much for responding! I did finally solve the issue.
I have two Makerbot 5th Gens, and would run the same model through both and one would be clean and the other would not. Makerbot’s own slicer, the newer version (Which btw, has gotten pretty sweet).
Basically it was a lubrication issue… I wrote an article on what I did for my blog here:
Fairly undocumented issue from what I have seen on the web. Would love your thoughts on the article.
Good to hear. I did have a similar issue some time back where I got a small bit of layer shift back and forth for a section of a print. It turned out it was a dry Z lead screw. I had printed so much in the same height range that once it would go past it the "tight’ area would cause the bed to skew slightly. I never noticed it because I had to get above a certain height. A ltttle super lube and several bed trips up and down the Z and it was back to normal.
