[BUG] Not Z homing using default configuration for Tronxy X5SA

[luiggies]

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

Yes, and the problem still exists.

Bug Description

I got newest bugfix.2.0.x and newest configuration file for Tronxy X5SA.
I flashed printer and I tray homing it but Z axis not homing.

When I call G28 command (or use Auto home from printer's menu):

1. Bed goes down 10 mm - correct
2. homing X axis - correct
3. homing Y axis - correct
4. extruder goes to center point of the bed (XY move) - correct
5. should homing Z axis but bed does not move - Z axis not homing - NOT correct.
6. Bed goes down 10 mm again - correct

Step 5 is very fast. Move from step 4 to 6 is very fast. Step 5 is not observable.

Tronxy X5SA ueses to homing and bed probe the same inductive sensor, so
Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN and USE_PROBE_FOR_Z_HOMING are defined

Configuration files: MarlinConfig.zip

Bug Timeline

No response

Expected behavior

Z homing correctly

Actual behavior

1. Distance between bed and extruder increase to 10 mm
2. Homing XY correctly
3. Homing Z - not effect
4. Distance between bed and extruder increase to 10 mm again.

Steps to Reproduce

Flash Tronxy X5SA newest bugfix-2.0.x and use default configuration file for this printer

Version of Marlin Firmware

Marlin bugfix-2.0.x

Printer model

Tronxy X5SA

Electronics

BOARD_CHITU3D_V5

[rhapsodyv]

Change to BOARD_CHITU3D_V6

[luiggies]

On the BOARD_CHITU3D_V6 during homing procedure:
Bed moves up (good), but soft doesn't listen inductive Z endstop - bed collision with extruder.

BTW: earlier issue with touch screen doesn't appear

[rhapsodyv]

This is exactly the same board I have. You need to use V5 board + this env chitu_v5_gpio_init

[luiggies]

Not good result. I set environment:

[platformio]
src_dir = Marlin
boards_dir = buildroot/share/PlatformIO/boards
default_envs = chitu_v5_gpio_init
include_dir = Marlin

and board defined as BOARD_CHITU3D_V5
but result is the same as main ticket description: #21339 (comment)

[rhapsodyv]

Can you try my tronxy branch?

https://github.com/rhapsodyv/Marlin

Because what you described is either a issue with the board version, or a issue with gpio init env, or a hardware issue.

[luiggies]

I tried it and effect is still the same, no correctly Z-homing.
Configuration.zip
On stock firmware Tronxy homing correctly.
any more advice?

[Dark-Lancer]

I had a similar problem on mz xy-2 pro.
I checked the endstop states with pronterface M119. After power on my z-sensor was at High until i triggered it 1 time manually.
I uncommented the following lines in configuration.h:

1030 #define ENDSTOPPULLUP_ZMIN
1031 #define ENDSTOPPULLUP_ZMIN_PROBE

then it works for me.

[luiggies]

Thank you for help but doesn't work - probably I must to change the mainboard...

[rhapsodyv]

@luiggies did it work for you?

[luiggies]

@rhapsodyv, not for the stock mainboard, I going to change it. I bought SKR v1.3, but I don't change it, yet.

[luiggies]

@rhapsodyv about tronxy mainboard: I noticed that, after starting the printer, Z homing does not work correctly,
but if i activate Z probing endstop (example I touch this using some piece of metals) before homing, homing procedure works correctly.

[Dark-Lancer]

@luiggies This is what i mentioned. Check the Endstoppullups in the marlin config. this worked for me.