G29 shrink the print  

G29 shrink the print

Hi,

I have some troubles with PrusaSlicer 2.2.0 and G29 auto bed leveling on my Ender 5 printer with a BLTouch.

If I add G29 after G28 for auto bed leveling then the print is shrunk on Z axis (X and Y are OK).

Without the G29, the print is OK.

Any idea what is going on?

Thanks

My gcode is:

; generated by PrusaSlicer 2.2.0+win64 on 2020-06-28 at 21:52:27 UTC

;

; external perimeters extrusion width = 0.45mm
; perimeters extrusion width = 0.45mm
; infill extrusion width = 0.45mm
; solid infill extrusion width = 0.45mm
; top infill extrusion width = 0.40mm
; support material extrusion width = 0.40mm
; first layer extrusion width = 0.70mm

M73 P0 R32
M73 Q0 S30
M201 X1000 Y1000 Z1000 E5000 ; sets maximum accelerations, mm/sec^2
M203 X200 Y200 Z12 E120 ; sets maximum feedrates, mm/sec
M204 P1250 R1250 T1250 ; sets acceleration (P, T) and retract acceleration (R), mm/sec^2
M205 X5.00 Y5.00 Z0.40 E1.50 ; sets the jerk limits, mm/sec
M205 S0 T0 ; sets the minimum extruding and travel feed rate, mm/sec
M107
G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
M107 ;start with the fan off
M140 S60 ; set bed temp
M190 S60 ; wait for bed temp
M104 S210 ; set extruder temp
M109 S210 ; wait for extruder temp
M300 S500 P500 ; chirp
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G29

....