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[BUG] Dual Z Stepper with dual endstop don't work #27014

@891paul

Description

@891paul

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

Yes, and the problem still exists.

Bug Description

Hello,
I have configured Marlin 2.1.2.2.
With 2 Z stepper motors and 2 endstops.

The steppers drive manually, but the homing function only works in X and Y. Nothing happens when homing Z.

The endstops respond with M119.

If you move the Z axis manually and press one of the two Z endstops, both steppers stop. But only one stepper should remain standing.

The problem can be found more often on the Internet.

Bug Timeline

Marlin 2.1.2.2

Expected behavior

Each stepper should stop with the corresponding limit switch and the homing function in Z and the homing function of all 3 axes should work

Actual behavior

Z Homing is not possible.
When you press a Z endstop, both steppers stop

Steps to Reproduce

No response

Version of Marlin Firmware

2.1.2.2

Printer model

No response

Electronics

BTT SKR V1.3

LCD/Controller

BTT TFT 35

Other add-ons

No response

Bed Leveling

MBL Manual Bed Leveling

Your Slicer

Prusa Slicer

Host Software

OctoPrint

Don't forget to include

  • A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Config.zip

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