Mesh bed compensation warning

bigsub

hello everyone, I'm having a problem probing my bed with a smart ir on a duet2 wifi.

Warning: the height map has a substantial Z offset. Suggest use Z-probe to establish Z=0 datum, then re-probe the mesh.

I use this version:
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 2.05.1 (2020-02-09b1)

This is the portion of config.g with endstops and z-probe:

; Endstops
M574 X1 Y1 S1 ;
M574 Z1 S2 ;

; Z-Probe
M558 P1 H5 F300 T4800 ;
M557 X10:270 Y0:235 P07:07 ;
G31 P500 X4 Y-0.5 Z2.45 ;

In homez.g:
G91 ;
G1 H2 Z5 F4800 ;
G90
G1 X20 Y0 F4800 ; go to first probe point
G30 ;

Where could be the origin of this warning?

Phaedrux

Please post your full config and homeall. And Bed.g if you use that as well.

bigsub

Phaedrux

Suggest use Z-probe to establish Z=0 datum, then re-probe the mesh.

Have you redone your mesh lately?

bigsub

Have you redone your mesh lately?

Five minutes ago.

Phaedrux

Try moving your homing position to place the probe at the center of the bed.

Are you using G32 (bed.g) to start the mesh probing?

bigsub

Try moving your homing position to place the probe at the center of the bed.

Are you using G32 (bed.g) to start the mesh probing?

Ok for homing position.
I use G29.

Phaedrux

Try using G32 to call it instead because your bed.g has M561 to clear the previous heightmap first.