Z height adjustment in config.g no effect

[Phil Maddox]

Im having issues where alterations in the config.g file have no effect on the actual z height used during printing.
Not sure what's going on . Help appreciated

i3 steel, direct drive extruder , Duetwifi ,DC42 IR sensor

RepRapFirmware for Duet 2 WiFi/Ethernet 3.2 (2021-01-05)
Duet WiFi Server Version: 1.23
Duet Web Control 3.2.0

Has worked fine for years to the extent that fine tuning on a textured PEI surface gave fantastic results by "squishing" the first layer "into" the texture but since a recent firmware update no amount of adjustment in config.g has any effect on actual print height.

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.10 on Fri Dec 18 2020 13:54:27 GMT+0800 (Singapore Standard Time)
 
; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"i3steel RRF3"                           ; set printer name
 
; Network
M552 S1                                        ; enable network
M586 P0 S1                                     ; enable HTTP
M586 P1 S0                                     ; disable FTP
M586 P2 S0                                     ; disable Telnet
 
; Drives
M569 P0 S1                                     ; physical drive 0 goes forwards
M569 P1 S1                                     ; physical drive 1 goes forwards
M569 P2 S1                                     ; physical drive 2 goes forwards
M569 P3 S0                                     ; physical drive 3 goes backwards (BMG S0)
M584 X0 Y1 Z2 E3                               ; set drive mapping
M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
M92 X100.63 Y80.54 Z400.00 E847.00             ; set steps per mm
M566 X500.00 Y500.00 Z18.00 E250.00            ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00        ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00            ; set accelerations (mm/s^2)
M906 X1000 Y1100 Z800 E660 I30                 ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                        ; Set idle timeout
 
; Axis Limits
M208 X0 Y0 Z-2.0 S1                            ; set axis minima
M208 X195 Y195 Z160 S0                         ; set axis maxima
 
; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z
 
; Z-Probe
;M558 P8 C"^zprobe.in" H3 F300 T3000           ; set Z probe type to digital and the dive height + speeds
M558 P1 C"zprobe.in" H3 F300 T3000             ; set Z probe type and the dive height + speeds
G31 P500 X30 Y-10 Z 1.00                       ; set Z probe trigger value, offset and trigger height Bigger value lower nozzle
M557 X30:190 Y0:180 S40                        ; define mesh grid
 
; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 R4700 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                          ; create bed heater output on bedheat and map it to sensor 0
M307 H0 A54.1 C395.6 D1.2 V12.4 B0 S1.00       ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                        ; map heated bed to heater 0
M143 H0 S110                                   ; set temperature limit for heater 0 to 110C
 
 
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.060000e-8   ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 A486.1 C290 D7.8 V12.5 B0 S1.00        ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S250                                   ; set temperature limit for heater 1 to 280C
 
; Fans
M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500                           ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T40                              ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"fan2" Q500                           ; create fan 2 on pin fan2 and set its frequency
M106 P2 S0.5 H-1                               ; set fan 2 value to 50%.PCB fan Thermostatic control is turned off
 
; Tools
M563 P0 D0 H1 F0                               ; define tool 0
G10 P0 X0 Y0 Z0                                ; set tool 0 axis offsets
G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C
 
; Miscellaneous
M575 P1 S1 B57600                              ; enable support for PanelDue
 
; Pressure advance 
M572 D0 S0.08  

[fcwilt]

Hi,

In the G31 command there looks like a space after the Z parameter before the value of 1.00.

Perhaps the new firmware doesn't like that space.

Frederick

[Phil Maddox]

@fcwilt Thanks ill give that a try .In the mean time Ive updated to 3.2.2 so hopefully the issue is gone

[fcwilt]

@phil-maddox said in Z height adjustment in config.g no effect:

@fcwilt Thanks ill give that a try .In the mean time Ive updated to 3.2.2 so hopefully the issue is gone

Well I think spaces like that are probably incorrect and should cause problems - it would be better if it caused a warning message to be issued.

Frederick

[droftarts]

@phil-maddox You can send G31 on it's own to check the Z offset setting. If you updated from RRF2, I have seen some reports that the update doesn't work quite correctly, and reflashing the firmware can fix some instances of strange behaviour. Also, 3.2.2 was a bug fix version to 3.2, and recommended to update to that (which you have done).

Ian

[Phil Maddox]

@fcwilt Well the removal of the space seemed to work !! Thanks for spotting that. Of course i need to kind of test it out properly but my instinct of " if it ain't broke don't fix it" is kicking in.
Thanks again

[Phil Maddox]

@droftarts Thanks . The problem is i updated to 3.2.2 and removed the space in the config. g file so am not really sure what solved what. Always an issue changing more things at once and I'm kicking myself for not doing them individually