[BUG] ABL/UBL Giving Incorrect Values

19Forty commented 11 months ago

Did you test with a precompiled firmware?

Yes, and the problem still exists.

Bug Description

When using the probe to level the bed, the it prints too high in the front right.

The Right side of my Bed Prints too High and left a fraction too low.
Nozzle is closest to the Bed at the back left and furthest at the front right.

Sorry if this is my mistake and not a Bug.

Bug Timeline

First had the Issue in September, gave up and went back to stock. Trying again now - same issue.

Expected behavior

I expect that using the Tramming wizard and UBL/ABL would result in a consistent first layer. Like it does using Stock Firmware.

Actual behavior

It always prints too high at the front right.

Steps to Reproduce

In September I tried

Different Start G Codes, Variations on G29, M420, Loading saved mesh, probing at beginning of print (every suggestion I could find in forums)
Different Slicers, Cura and Teaching Tech's calibration pages on Github
Printing from Octoprint or from SD Card
Checking and dialing in every physical setting I could find advice on - including probe offset.
Checking my frame and bed

I followed the suggested instructions to manually level my Bed and had much better results, however I was perplexed as Auto levelling worked previously on stock firmware.

I then flashed back to stock and leveling worked fine.

I flashed back again this weekend (Precompiled Ender3V2-422-BLTUBL-TJC-MPC-20230904) after replacing my extruder with a Sprite NEO SE and replacing my build plate with a better PEI sheet. Whilst the issue is less pronounced (I could print smaller things fine) it is still there.

I turned of HS Mode to see if that was the issue but was still there.

To test I did the following: For these tests I used Teaching Techs First Layer Calibration tool and Printed from the SD Card.

Printed with a probe at the beginning of the print - Issue occurs
Printed with no leveling in GCode - Print was much better
Trammed my bed manually with a piece of paper
Ran the Tramming Wizard - it told me that my right side was too high by a fair bit.
Ran the Auto Mesh Build - again, everything on the right is too high.

I then flashed to stock again to confirm and printed a first layer test - all good.

I then compiled a Version of the Firmware with UBL unticked in the configurator and tried using that, in case it was specifically a UBL issue. Ender3V2-422-BLT-TJC-MPC-20230904

It still is not level.

Version of Professional Firmware

Ender3V2-422-BLTUBL-TJC-MPC-20230904

Printer model

Creality Ender 3 V2 Neo

Electronics

Board 4.2.2 / Chip RET / Display TJC

Add-ons

New PEI Build Plate (Tried with Original too), Sprite SE Extruder (issue was there with original too)

Bed Leveling

UBL Bilinear mesh

Your Slicer

Cura

Host Software

None

Additional information & file uploads

No response

19Forty commented 11 months ago

I'm an idiot and did half of my testing with a lose hot end. Joined Patreon as penance (and Thanks)

github-actions[bot] commented 9 months ago

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

mriscoc / Ender3V2S1