z-offset with two printheads

axiom

I have two printheads on the x-axis. The height ((z-axis) is adjusted via the bed. I have now set my capacitive sensor as an end stop approx. 2 mm in front of the print heads. How do I have to proceed to set the z-offset for both print heads?

jay_s_uk

you would adjust the Z offsets using G10 in your config. Best to probably leave the first with a 0 z offset and just the offset from the first head to the second on just the second one

axiom

@jay_s_uk said in z-offset with two printheads:

you would adjust the Z offsets using G10 in your config. Best to probably leave the first with a 0 z offset and just the offset from the first head to the second on just the second one

and how do I set the first z-offset?

jay_s_uk

@axiom https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_testing

axiom

@jay_s_uk
i have successfully done this step by step... how do i add a second print head in the code?

Here my code:
; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.12 on Wed Aug 24 2022 12:56:11 GMT+0200 (Mitteleuropäische Sommerzeit)

; General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"DUKA1300" ; 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 P1 S1 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S0 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M569 P4 S0 ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E3:4 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
;M92 X80.00 Y80.00 Z400.00 E420.00:420.00 ; set steps per mm
M92 X80.00 Y80.00 Z640.00 E420.00:420.00 ; set steps per mm
M566 X900.00 Y900.00 Z120.00 E120.00:120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z30.00 E250.00:250.00 ; set accelerations (mm/s^2)
M906 X1800 Y1680 Z2000 E1800:1800 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 X600 Y700 Z1100 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
;M574 Z2 S1 P"zstop" ; configure switch-type (e.g. microswitch) endstop for high end on Z via pin zstop
;M574 Z2 S2 ; configure Z-probe endstop for high end on Z
; Z-Probe
M558 P1 C"!zprobe.in" H5 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds
G31 P1000 X20 Y20 Z7 ; set Z probe trigger value, offset and trigger height
M557 X15:215 Y15:195 S10 ; define mesh grid

; Heaters
M308 S0 P"e1temp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin e1temp
M950 H0 C"e1heat" T0 ; create nozzle heater output on e1heat and map it to sensor 0
M307 H0 R1.797 K0.742:0.000 D7.57 E1.35 S1.00 B0 V23.8 ; disable bang-bang mode for heater and set PWM limit
M143 H0 S250 ; set temperature limit for heater 0 to 250C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; 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 R1.797 K0.742:0.000 D7.57 E1.35 S1.00 B0 V23.8 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S250 ; set temperature limit for heater 1 to 250C
M308 S2 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 2 as thermistor on pin bedtemp
M950 H2 C"bedheat" T2 ; create bed heater output on bedheat and map it to sensor 2
M307 H2 R0.283 K0.463:0.000 D7.17 E1.35 S1.00 B0 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H2 ; map heated bed to heater 2
M143 H2 S280 ; set temperature limit for heater 2 to 280C

; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
;M106 P0 S1 H0 T45 ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
;M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H0 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
M563 P1 D1 H1 F1 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 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

jay_s_uk

@axiom said in z-offset with two printheads:

M563 P1 D1 H1 F1 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C

here

axiom

@jay_s_uk said in z-offset with two printheads:

M563 P1 D1 H1 F1 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C

Ok, but if the nozzle is 1 mm higher, then I can't do a test at all, because otherwise it will go into the print bed

jay_s_uk

@axiom can't you move tool 0 out the way of the bed to allow it move higher?

axiom

@jay_s_uk I can unscrew the nozzle from tool 0

jay_s_uk

@axiom so how do you expect to get to tool 1 if tool 0 is in the way?

axiom

@jay_s_uk
then I have to change something in the hardware... can you recommend me something?