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MarlinFirmware / Marlin

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
https://marlinfw.org
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[BUG] Ender 3 BLTouch Bed Leveling not working properly- Nozzle crashes into print bed #23805

Closed thespica93 closed 2 years ago

thespica93 commented 2 years ago

Did you test the latest bugfix-2.0.x code?

Yes, and the problem still exists.

Bug Description

Hi again,

I have an Ender 3 with a BLTouch and Neopixels. The Neopixels are working perfect, but the bed leveling is an issue. The BLTouch I believe is configured properly in the code. The BLtouch is version 3.1, and has 1 5 pin cable connected to the Creality 4.2.2 board. Auto homing appears to be working, the nozzle sits dead center on the print bed.

However, when selecting bed leveling the nozzle goes to point 0,0 but the probe is off the bed. I was able to get around this by setting the PROBING_MARGIN to 40. But this doesn't seem correct

I verified the print bed was correct in the code. I even tried setting the X_MIN_POS, and Y_MIN_POS to the settings from Cura, but this just makes things worse.

I have looked over the code dozens of time and can't find the issue. The code will compile fine, but bed leveling is off. Can someone look this over and see if its a bug or I'm just an idiot. *I will attach the zipped file I have been working in, as well as a video showing the issue. Thank you!

Bug Timeline

No response

Expected behavior

When selecting bed leveling, the nozzle should go to the front left corner with the probe on the print bed, and then second the probe should be center front, and then right front (the nozzle should be off the bed now, with the probe on the bed), and then row 2, and row 3.

Actual behavior

BLtouch will auto home perfectly

Bed leveling will fail. Nozzle will go to point 0,0 and begin to lower, but the probe is not on the bed causing the nozzle to crash into the bed.

Steps to Reproduce

  1. Compile my code in the attachments
  2. Load to an Ender 3 with Creality 4.2.2 board
  3. auto home
  4. Then select bed leveling

Version of Marlin Firmware

2.0.x

Printer model

Ender 3

Electronics

Stock- came with Creality 4.2.2 board

Add-ons

Bltouch, neopixels

Bed Leveling

ABL Bilinear mesh

Your Slicer

Cura

Host Software

OctoPrint

Additional information & file uploads

Marlin.zip IMG_9899.MOV.zip

Attached is the Marlin Configuration files from my Firmware And a short video showing the behavior.

Thank you for everything. Please reach out with any question -Nick

thisiskeithb commented 2 years ago

This Issue Queue is for Marlin bug reports and development-related issues, and we prefer not to handle user-support questions here. (As noted on this page.) For best results getting help with configuration and troubleshooting, please use the following resources:

After seeking help from the community, if the consensus points to a bug in Marlin, then you should post a bug report.

github-actions[bot] commented 2 years 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.