Can't get mesh bed leveling to work

Hi I'm trying to enable the mesh bed leveling feature on my printer.
My printer is a Ender-3 patched with the latest version of Marlin (1.1.9)

I've already done it in the past on another printer, but this time I can't get it to work.

I think I followed all the procedure :

Enable MESH_BED_LEVELING in configuration.h
Enable LCD_BED_LEVELING in configuration.h

Level the bed and save to eeprom (using LCD)

Add M420 S1 after the G28 in the startup GCODE

During a print, the Z axis doesn't move to compensate the mesh data.
It's still moving when going to the next layer, but it's completely idle while a layer is printing.

I connected to my printer with pronterface,

If I do a M420 S1, the printer answer me with

Bed Leveling On
Fade Height Off

If I do a M420 V1 the saved mesh is correctly returned.
Then if I move the head around the X and Y axis, the Z axis is still idle and not compensating for the mesh.
Shouldn't the Z axis be moving ?

I attached my configuration.h and configuration_adv.h if it can help.

Anybody have an idea ?
Thanks

I have always added "M420 S1" to the last lines of the Startup -G-Code like this, to restore the Bed Leveling Data.

M117 My Print...
G28 X0 Y0
G1 E4.0 ;prime extruder
G92 E0 ;reset extruder length
M420 S1 ; Bed Leveling On
M220 S32.000000
;M420 V1 ; Print the leveling grid

Edited 1 time(s). Last edit at 09/06/2018 10:23PM by Roberts_Clif.

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Computer Programmer / Electronics Technician

I reflashed my firmware, did the mesh leveling again and now it seems to be working...

Maybe I was too tired yesterday and didn't see that the z axis was moving a little.

But now my print perfectly stick to the bed, so problem solved !

Thanks for your help.

I have also enabled baby-stepping - this allows me to nudge the nozzle into position during the single or multi line Skirt.

#define BABYSTEPPING

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Computer Programmer / Electronics Technician