@rjenkinsgb I've tried this but it hasn't worked either

@fcwilt

Second failed attempt hahaha
This is how my settings have been

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)
G91
G1 H1 Z-905 F360 ; move Z down stopping at the endstop; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-1005 Y-905 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000 ; go back a few mm
G1 H1 X-1005 Y-905 F360 ; move slowly to X and Y axis endstops once more (second pass)

G90 ; absolute positioning
; set Z position to axis minimum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)
G91 ; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Z-905 F1800 ; move Z down until the endstop is triggered
; set Z position to axis minimum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning

@fcwilt Hello, thank you very much for your answer, I understand what you say but it is not that.
There is a difference of several millimeters when my endstop is very close to z = 0, it seems that the z axis goes up after home.
Delete from homeall and home z a line that said G92 Z0, that seemed to work during one print but the next the same problem started again.

Hello dears,
I'm having a problem with my Duet 3 MB6HC, I'm just finishing setting everything up. I am using a son z probe printer, and when it is about to start printing for some reason the z axis is raised approximately 5mm.

; Configuration file for Duet 3 (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)

; General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"CTDA" ; set printer name

; Network
M551 P"12345678" ; set password
M552 P0.0.0.0 S1 ; enable network and acquire dynamic address via DHCP
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0.1 S1 ; physical drive 0.1 goes forwards
M569 P0.4 S1 ; physical drive 0.4 goes forwards
M569 P0.2 S0 ; physical drive 0.2 goes backwards
M569 P0.3 S0 ; physical drive 0.3 goes forwards
M584 X0.1 Y0.4 Z0.2 E0.3 ; set drive mapping
M350 X32 Y132 Z128 E32 I1 ; configure microstepping with interpolation
M92 X168.65 Y168 Z550.00 E1674.00 ; set steps per mm
M566 X900.00 Y400.00 Z250.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y2000.00 Z500.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X3000 Y4000 Z3000 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X1200 Y1000 Z1000 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"!io1.in" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin !io1.in
M574 Y1 S1 P"!io3.in" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin !io3.in
M574 Z1 S1 P"!io2.in" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin !io2.in

; Z-Probe
M558 P0 H0 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M556 S50 X0 Y0 Z0 ; set orthogonal axis compensation parameters
M557 X100:1100 Y100:1100 S100 ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"pt1000" R2200 ; configure sensor 0 as PT1000 on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M307 H0 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"pt1000" R2200 ; configure sensor 1 as PT1000 on pin temp1
M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"out7" Q500 ; create fan 0 on pin out7 and set its frequency
M106 P0 S0 H1 T45 ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"out8" Q500 ; create fan 1 on pin out8 and set its frequency
M106 P1 S1 H-1 ; set fan 1 value. Thermostatic control is turned off

; Tools
M563 P0 D0 H1 F0:1 ; 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

; Custom settings are not defined

; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
T0 ; select first tool

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-1005 Y-905 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000 ; go back a few mm
G1 H1 X-1005 Y-905 F360 ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z-905 F360 ; move Z down stopping at the endstop
G90 ; absolute positioning
G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-1005 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X5 F6000 ; go back a few mm
G1 H1 X-1005 F360 ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000 ; lower Z again
G90 ; absolute positioning

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Y-905 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000 ; go back a few mm
G1 H1 Y-905 F360 ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000 ; lower Z again
G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.5 on Thu Nov 04 2021 00:44:43 GMT-0300 (hora estándar de Argentina)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Z-905 F1800 ; move Z down until the endstop is triggered
G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

Okok I understand the point, I think it will be easier and faster to get a pt1000 than a dougther board (I'm in Argentina). Thank you very much to all!

@Veti Yes, the problema alredy buy a pt100

@dc42 Thank you very much for your reply! Yes, I think it would have 1 ohm every 5ºC approximately, anyway I am interested in doing a test until deciding whether to buy a dougther board or maybe a pt1000. Is there information on what are the coefficients with which I must configure the firmware?

Hello dears,

a very basic question, is it possible to connect a pt100 temperature sensor on a duet 3 6hc board without using a temperature daughter boards?

Thank you very much and greetings!