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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] (All Axis remaining trusted when steppers are off) #25559

Closed Martian-35 closed 1 year ago

Martian-35 commented 1 year ago

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

The printer trusts the last position it was even though the steppers were inactive. This can cause crashes if the Axis is moved manually. My ender 3V2 has a Magnetic probe that is stored on the gentry all the way on the right side. To dock it just needs to move to X243 and it attaches.

Bug Timeline

Seems to have been an issue in the past: https://github.com/MarlinFirmware/Marlin/issues/23095

Expected behavior

(VIDEO 1 IN THE LINKED FOLDER) If its the first G28 it trusts no axis so it homes X and Y, picks up the probe (X243), goes to the center of the bed (X114) and the lowers Z till it hits the be with the probe. Prefect. if it would do this every time the Steppers get disabled everything would be good.

Actual behavior

But what actually happens is on your second print, after the motors have been disabled, it grabs the probe, but instead of going to the center of the bed, it goes to down to Z20 first and the over to middle of the bed.(VIDEO 2) This works most of the time out of luck, BUT if the the Gentry has been lower manually since the last print, it crashes into the probe removing mechanism/edge of bed on the way down to Z20. (VIDEO 3) So it trusts the previous Z position instead of doing what it does on the first homing after start up. I even ran a "G28 O" which only probe untrusted axis and it did nothing. So all axis are trusted but "Z" is the biggest problem, in my case.

Steps to Reproduce

  1. Get an Ender 3 with a Klack Magnetic probe.
  2. Home all axis.
  3. Raise the gentry up about Z100 through the menu.
  4. Disable steppers.
  5. Lower gentry manually by 20mm or more.
  6. Home again. IT WILL CRASH! SO HAVE YOUR FINGER ON THE POWER TO STOP IT AFTER IT GOES PAST WHERE Z20 SHOULD BE

Version of Marlin Firmware

2.1.2 bugfix

Printer model

Creality Ender 3v2

Electronics

Creality 4.2.7 board

Add-ons

Klackender magnetic probe, removed Z homing switch

Bed Leveling

UBL Bilinear mesh

Your Slicer

Prusa Slicer

Host Software

OctoPrint

Don't forget to include

Additional information & file uploads

(LINK TO VIDEOS AND CONFIG FILES) https://drive.google.com/file/d/1dfbowAQxYEUUU37z1stysA27-hXN2aYc/view?usp=sharing

RELATED FIRMWARE CHANGES: -Enabled ...#define MAG_MOUNTED_PROBE...

-Enabled ...#define USE_PROBE_FOR_Z_HOMING...

-Changed ...#define X_MAX_POS X_BED_SIZE +15... so the X axis can dock

-Enabled: ...#define AUTO_BED_LEVELING_UBL...

-Enabled ...#define RESTORE_LEVELING_AFTER_G28...

-Enabled ...#define Z_SAFE_HOMING...

-Changed the V422 in ...#define MOTHERBOARD BOARD_CREALITY_V422... to V427

all the changes I made are marked "//SS"

thisiskeithb commented 1 year ago

Duplicate of https://github.com/MarlinFirmware/Marlin/issues/23095

thisiskeithb commented 1 year ago

Since https://github.com/MarlinFirmware/Marlin/issues/23095 is still open, please add your information there. The bug has already been confirmed though.

Martian-35 commented 1 year ago

But they say Z is untrusted, while here Z is the main problem.

github-actions[bot] commented 1 year 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.