@fcwilt
I think I read somewhere that I should use relative extrusion. is it right? Then I should include in the start g-code

@fcwilt

Now I set my Z Trigger height in G31 according to this:
https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

After that my print start has began on the right Z height.. Thanks for the advices. As I see now, that was my problem..

My other question is, what do you think, what should I include in my start or maybe end g-code on an idex.
Is there something special for RRF that I should include in these?

@fcwilt

This is very convenient, thank you for the tip.

I had a few succesful print since I made the Z-offset correctly.

@fcwilt
I think I read somewhere that I should use relative extrusion. is it right? Then I should include in the start g-code

@fcwilt

Now I set my Z Trigger height in G31 according to this:
https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

After that my print start has began on the right Z height.. Thanks for the advices. As I see now, that was my problem..

My other question is, what do you think, what should I include in my start or maybe end g-code on an idex.
Is there something special for RRF that I should include in these?

@peter247
About 3mm Between the tip of the nozzle and the tip of the BLtouch. Thats what you define in G31, isn't it? Thats why it is off with X-29.75 and Y-14.5. Z-probe position from the nozzle's point of view.

@peter247
The Z offset between the nozzle and BLTouch is at about 3mm

I don't know if it means this, but it is not near to hit the bed when it retracts

@peter247
I have tried so many ways now. In the beginning it was Z0.0 in G31.
I have to babystep down, usually it grips in -2.1.
But I will have a try again..

@peter247

It doesn't show value but I guess if after a G30 probing it stays well above the bed then the Z0 has changed.

That's what I am doing in the Z-Offset macro yes. Babystepping down. Then it saves the Z0 until re-home or print start.

@fcwilt
The Z-Offset between the nozzle and the bed which I would like to set with a BLtouch

@peter247
Sorry for the misunderstanding.
Yes I have, and I can set it. Then I re-home, or start a print and the Z-offset changes back to some other value. Like it got a new Z0, thats why I cant babystep down more I think. So when I start a new print it only prints in the air well above the bed and in DWC it says its on Z0.3 on first layer.

Hello all,

I am familiar with marlin but I chose DUET and RRF for my newly built IDEX.
I have a strange problem where I use a macro to set the Z offset. I set it easily and then the Z0 position is fine until I start a print or home my axes. No matter what it changes back to old Z0 and can't even babystep down to the proper position.

; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"Printer"                         ; set printer name

; Network

M552 S1 								; IP HERE
M586 P0 S1					   					   ; Enable HTTP
M586 P1 S0				           				   ; Disable FTP
M586 P2 S0					  					   ; Disable Telnet

; Drives

M569 P0.0 S0                                         ; physical drive 0.0 goes forwards E0
M569 P0.1 S0                                         ; physical drive 0.1 goes forwards E1
M569 P0.2 S0                                         ; physical drive 0.2 goes forwards  X1
M569 P0.3 S0                                         ; physical drive 0.3 goes forwards X2 (U)
M569 P0.4 S0                                         ; physical drive 0.4 goes forwards Y
M569 P0.5 S1                                         ; physical drive 0.5 goes forwards Z
M569 P0.6 S1                                         ; physical drive 0.6 goes forwards Z
M584 X0.2 Y0.4 Z0.5:0.6 U0.3 E0.0:0.1                              ; set drive mapping
M671 X-30:330 Y150:150 S2; leadscrews at left (connected to Z) and right (connected to E1) of X axis
M208 X0:235 Y0:300 ; X carriage moves from 0 to 235, Y bed goes from 0 to 300


M350 X16 Y16 Z16 U16 E16 I1                        ; configure microstepping with interpolation
M92 X80 Y80 Z400 U80 E415:415                         ; set steps per mm
M203 X12000 Y12000 Z6000 U12000 E5600:5600             ; set maximum speeds (mm/min)
M201 X900 Y750 Z100 U900 E10000:10000                    ; set accelerations (mm/s^2)
M566 X800 Y650 Z60 U8000 E1300:1300                     ; set maximum instantaneous speed changes (mm/min)
M906 X1000 Y1000 Z800 U1000 E850:850 I50              ; set motor currents (mA) and motor idle factor in per cent
M84 E0.0:0.1 X0.2 Y0.4 U0.3 S30                                            ; Set idle timeout

; Axis Limits

M208 X0 Y0 Z-2.50 U65 S1  ; set axis lower limits
M208 X235 Y310 Z300 U300 S0   ; set axis upper limits


; Endstops
                              
M574 X1 P"!io0.in" S1		  				       ; active-low endstop for low end on X via pin io0.in                             
M574 Y1 P"!io1.in" S1		  					   ; active-low endstop for low end on Y via pin io1.in
M574 U2 P"!io2.in" S1							   ; Use an endstop on U, stop at high end                            

; Z-Probe BLTouch

M950 S0 C"io3.out"                           ; create servo pin 0 for BLTouch
M558 P9 C"^io3.in" H10 F480 T12000 A5         ; set Z probe type to bltouch and the dive height + speeds
G31 P25 X-29.75 Y-14.50 Z2.2                ; set Z probe trigger value, offset and trigger height
M557 X40:180 Y40:260 S40 ; probe from X=10 to 190, Y=10 to 190mm with a mesh spacing of 20mm

; Heaters

M308 S0 P"temp2" Y"thermistor" A"Bed" T100000 B3950             ; configure sensor 0 as thermistor on pin temp2
M950 H0 C"out0" T0                                 				; create bed heater output on out0 and map it to sensor 0
M140 H0   														; map heated bed to heater 0
M143 H0 S120 
M307 H0 S1.00 B0                                       				; set temperature limit for heater 0 to 120C
M307 H0 A124.0 C184.6 D2.5 S1.00 B0						; disable bang-bang mode for heater  

M308 S1 P"temp0" Y"thermistor" A"Hotend" T100000 B4450 C7.06e-8         ; configure sensor 1 as thermistor on pin temp0
M950 H1 C"out1" T1                                 							  ; create nozzle heater output on out1 and map it to sensor 1
M143 H1 S290
M307 H1 S1.00 B0                                      		 					  ; set temperature limit for heater 1 to 290C
M307 H1 A286.0 C164.4 D2.9 S1.00 V24.0 B0		         					  ; disable bang-bang mode for heater  and set PWM limit

M308 S2 P"temp1" Y"thermistor" A"Hotend2" T100000 B4450 C7.06e-8            ; configure sensor 1 as thermistor on pin temp1
M950 H2 C"out2" T2                                 							  ; create nozzle heater output on out3 and map it to sensor 2
M143 H2 S290 
M307 H2 S1.00 B0                                      		 					  ; set temperature limit for heater 1 to 290C
M307 H2 A286.0 C164.4 D2.9 S1.00 V24.0 B0		         					  ; disable bang-bang mode for heater  and set PWM limit


; Fans
M950 F0 C"out3" Q500                               ; create fan 0 on pin out3 and set its frequency
M106 P0 S0 H-1                                     ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out4" Q500                               ; create fan 1 on pin out4 and set its frequency
M106 P1 S0 H1 T50                                ; set fan 1 value. Thermostatic control is turned on

M950 F2 C"out5" Q500                               ; create fan 2 on pin out5 and set its frequency
M106 P2 S0 H-1                                     ; set fan 0 value. Thermostatic control is turned off
M950 F3 C"out6" Q500                               ; create fan 1 on pin out6 and set its frequency
M106 P3 S0 H2 T50                                  ; set fan 1 value. Thermostatic control is turned on


; Tools
M563 P0 D0 H1 X0.2 F0 S"X"						; Tool0 uses Extruder0, Heater1 and Fan0
G10 P0 X0 Y0 Z0 R0 S0								; Set Tool0 axis offsets and temperatures

M563 P1 D1 H2 X0.3 F2 S"U"						; Tool1 uses Extruder1, Heater2 and Fan2. X-axis is mapped to U
G10 P1 X0 Y0 Z0 R0 S0								; Set Tool1 axis offsets and temperatures

;  Create a tool that prints 2 copies of the object using both carriages
M563 P2 D0:1 H1:2 X0.2:0.3 F0:2 S"copy" ; tool 2 uses both extruders, hot end heaters and fans, and maps X to both X and U
G10 P2 X107 Y0 U-77 S0 R0 ; set tool offsets and temperatures G10 P2 X115 Y0 U-80 S0 R0///G10 P2 X100 Y0 U-100 S0 R0
M567 P2 E1:1 ; set mix ratio 100% on both extruders

M563 P3 D0:1 H1:2 X0.2:0.3 F0:2 S"mirror" ; tool 2 uses both extruders, hot end heaters and fans, and maps X to both X and U
G10 P3 X107 Y0 U-30 S0 R0 ; set tool offsets and temperatures TO CONFIG
M567 P3 E1:1 ; set mix ratio 100% on both extruders


; Miscellaneous - Power Down! RECOVERY
M911 S23 R24 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000"  ; set voltage thresholds and actions to run on power loss
M404 N1.75											; Define filament diameter for print monitor


M575 P1 S1 B57600


M308 S20 Y"mcu-temp" A"CPU" 				; CPU temp sensor
M308 S21 Y"drivers" A"Duet_drv" 			; drivers temp sensor
M308 S4 Y"drivers" A"TMC Drivers"			; Define Sensor4 as the TMC overheat sensor

T0											; Activate T0 by default	

;M501

; homeall.g
; Called to home all axes

; BLTouch preperation
M280 P0 S160												; Precautionary alarm release
M280 P0 S90													; Ensure the pin is raised

; Home X, Y and U simultaneously
G91															; Relative positioning
G1 Z5 F4000 H2												; Lift Z relative to current position
G1 X-999 Y-999 U999 F4000 H1								; Move Y-axis to the endstop and stop (first pass)
G1 X5 Y5 U-5 F300											; Go back a few mm
G1 X-999 Y-999 U999 F300 H1; Move Y-axis to the endstop once more (second pass)
G90															; Absolute positioning

; Home Z using the Z-Probe
T0 P0														; Ensure we are on Tool0 which carries the Z-Probe (P0 skips tool files)													; Reset baby-stepping to 0
G1 X230.00 Y150.00 F4000									; Move T0 to probing point (X150, Y150), including probe offset
G30															; Probe the bed and set Z to the probe offset

G1 X100 Y100 Z50 F4000 

I am curious, what can it be..

I also would like to ask for some specific things that what should I include in my starting G-code? Now its only consist of homing and some small movements, nothing special.
Could someone help a newbie there?
Thanks in advance.