I was using an old marlin firmware with auto bed leveling enabled and every

3D Printing
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1

I was using an old marlin firmware with auto bed leveling enabled and every think worked great, but after i updated marlin after it runs G29 the nozzle raise then start printing from the air.
I use proximity sensor for auto bed leveling, my start Gcode command is:
G28
G29
G92 Z0.2
Any ideas???

2

Could be a bug in the latest Marlin version. I would report it. Also double check that you have the endstop switched to HIGH for the inductive sensor

3

https://github.com/MarlinFirmware/Marlin/issues/4315 - try using the latest RCBugFix, may have been sorted

4

Use the M851 command to set the gap between the probe and nozzle. Save this setting in eeprom with M500 and test/adjust untill right. Make sure you configured the probe settings like its orientation and style i.e. ‘fixed probe’ in config.h
happy to help if you het stuck.

5

Thank you guys for your for you quick response

6

it turns out that i forgot to set (z min end stop) to true ,so i set it true but another problem appears ,when i hit z homing button it home to the opposite direction and auto leveling also

7

i tried to change home DIR but z homing doesn’t move at all

8

@Ali_Fadl - I’d suggest you put a post on the Marlin GitHub and read the bug reports - https://github.com/MarlinFirmware/Marlin/issues/ you’re more likely to find the answer/get the best help there.

9

Ok, thanks