Layer thicker when printhead moving to right, but thinner when moving to left.  

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Hi Marius,

I am having the same issue, only mine occurs on the opposite side of the print bed. I purchased two Original Prusa mk2 printer kits from Prusa, and I had no issues with assembly of the first kit. However, the second kit is causing me some bed leveling troubles. After a successful XYZ calibration run, I attempt to run the "V2 Calibration" gcode and I can only get proper adhesion on the left side of the bed, and no adhesion on the right-hand side. If I lower the Z-height using live adjustment such that the right-hand side gets proper adhesion, the left-hand side is EXTREMELY squished, and the nozzle is so low it drags into the PEI which is no good. :/

Things I've tried so far:
- Adjustment of PINDA probe height
- Verified that all six screws are properly tightened on the underside of the heat bed.

I'm at a loss so far, but these are my first 3D Printers so maybe there's an easy fix that I'm unaware of 🙂 I'm going to be investigating this today and I'll post some update if I figure out my situation!

-Rob

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Hi Marius,

I am having the same issue, only mine occurs on the opposite side of the print bed. I purchased two Original Prusa mk2 printer kits from Prusa, and I had no issues with assembly of the first kit. However, the second kit is causing me some bed leveling troubles. After a successful XYZ calibration run, I attempt to run the "V2 Calibration" gcode and I can only get proper adhesion on the left side of the bed, and no adhesion on the right-hand side. If I lower the Z-height using live adjustment such that the right-hand side gets proper adhesion, the left-hand side is EXTREMELY squished, and the nozzle is so low it drags into the PEI which is no good. :/

Things I've tried so far:
- Adjustment of PINDA probe height
- Verified that all six screws are properly tightened on the underside of the heat bed.

I'm at a loss so far, but these are my first 3D Printers so maybe there's an easy fix that I'm unaware of 🙂 I'm going to be investigating this today and I'll post some update if I figure out my situation!

-Rob

Make sure that the two Y axis threaded rods are sitting firmly all the way down into the frame. When I assembled mine I had to actually sand away some of the black paint to get a snug fit. If they not fit to 100% you'll get the issues that you describe.

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Patrik,

Thank you for the reply! I'm going to give that a shot now, and re-run calibration and report back. Thank you again!

-Rob

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Hi guys,

I just found that the right rear corner is 1.2mm lower when I measured the distance from the bed to the top frame. Next step is to find out if the bed is bent or is just the corner lower. Will keep you updated.

Thanks

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Hi,

After few nights of adjusting I managed to get perpendicular axes , but still have problems with calibration. I then bought a metal ruller and found out that my bed is actually bent in the middle. Picture attached.

Any suggestions on how to fix this ? The auto leveling is not helping.

Thanks

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

This is just a temp fix, but you could put blue tape in the middle where the light is coming through. It would be cool if there was a setting in the firmware to account for this scenario, but I think the current parameters only allow you to make z offsets if the corners of the bed are higher or lower.

Did you already try this:

LCD Menu/Calibration/Bed Level Correct

This allows up to +-50 micron adjustment of front/rear/left/right without messing with GCodes. The GCode adjustment allows +-100 microns, I believe.

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

I would send this picture to the PR support and nicely ask for a new heatbed. No clue if they honor it, but worth a try.

If you losen the screws in the middle of the buildplate a little, does it get better? If so, mabe find some shims or thin washers to put there?

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

I did losen the screws in the middle and it gets better along the Y axis , but then I am getting problems on X axis with the middle going up.

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Hi,
Does anyone know if prusa support still have chat option ? wondering if someone can help me locate it. Did't manage to contact them yet. Just sent an email but no answer yet.

Thanks
Marius

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Marius

If the live chat is not being blocked by your router/firewall, it will appear as an orange bar at the bottom right of your browser when viewing the shop pages.

Peter

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Thanks. Just managed to get in contact with them.

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Would be nice if you post any results you achieve!
Seems like I have the same issues along with some other guy.
https://shop.prusa3d.com/forum/prusa-i3-kit-building-calibrating-first-print-main-f6/another-bed-unlevel-post-front-to-back--t2600.html

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

Happy Christmas guys.
Sorry for the late reply. I received a new heatbed from prusa ( they were very proffessional and sent the bed very quickly ). After replacing the bed, the level is a lot better.

I would also recommend checking if the Y carriage is straight. Just use a metal ruller across diagonals. If it is bent , try to press it gently to straighten it up.

I have attached some pictures with some printed stuff.

Re: Layer thicker when printhead moving to right, but thinner when moving to left.

I ended up putting washers under the bed on the corners to flatten my bed out.

Mat