DIY Corexy Dual extruder custom Gcode templates?  

DIY Corexy Dual extruder custom Gcode templates?

Hello

I made a custom Corexy with original E3D Chimera extruder

I will try to start printing with dual material, mainly for piece and support

Anyone can suggest me some good Gcodes (start/end/tool change/Filament) to start with?

This is my start gcode

;My start Gcode start
M530 S1 ;Start printing
M140 S[first_layer_bed_temperature] ;set bed temp
M104 S150 ;set initial extruder temp
M190 S[first_layer_bed_temperature] ;wait for bed temp
M109 S[first_layer_temperature] ;wait for extruder temp
G92 E0 ;reset extruder
G28 ;home all axes
M420 S1 ;Enable last-saved mesh bed correction
G1 X-10 F6000 ;Go to left extruder purge X position
G1 Y15 ;Go to left extruder purge Y position
G1 Z0.4 F3000 ;Go to left extruder purge Z position
G1 E25 F150 ;purge the filament left extruder
G92 E0 ;reset extruder
G1 F{machine_max_feedrate_x[0]} ;Set feedrate
M900 T0 K1.300 ;Set left K pressure advance
M900 T1 K1.300 ;Set right K pressure advance
M117 ;Printing...
;My start Gcode end

I want to print a piece with PETG on left (T0) tool and PLA on right (T1) tool

My left filament PETG has 245 first layer temperature and 235 other layers temperature

The resulting Gcode is:

; generated by PrusaSlicer 2.4.2+win64 on 2022-05-30 at 10:21:48 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 = 0.45mm
; first layer extrusion width = 0.42mm

M73 P0 R275

M107 ; disable fan
;TYPE:Custom

;My start Gcode start
M530 S1 ;Start printing
M140 S80 ;set bed temp
M104 S150 ;set initial extruder temp
M190 S80 ;wait for bed temp
M109 S245 ;wait for extruder temp
G92 E0 ;reset extruder
G28 ;home all axes
M420 S1 ;Enable last-saved mesh bed correction
G1 X-10 F6000 ;Go to left extruder purge X position
G1 Y15 ;Go to left extruder purge Y position
G1 Z0.4 F3000 ;Go to left extruder purge Z position
G1 E25 F150 ;purge the filament left extruder
G92 E0 ;reset extruder
G1 F200 ;Set feedrate
M900 T0 K1.300 ;Set left K pressure advance
M900 T1 K1.300 ;Set right K pressure advance
M117 ;Printing...
;My start Gcode end

G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0 ; reset extrusion distance

T0 ; change extruder
G92 E0 ; reset extrusion distance
; Azure PETG Nero start gcode
M109 S230 T0 ; set temperature and wait for it to be reached
M107 ; disable fan

;LAYER_CHANGE
;Z:0.2
;HEIGHT:0.2
G1 E-5 F3000 ; retract
G92 E0 ; reset extrusion distance
G1 Z.2 F7800 ; lift Z
G1 Z.4 ; lift Z
G1 X116.365 Y115.928 ; move to first skirt point
G1 Z.2 ; restore layer Z
G1 E5 F3000 ;  ; unretract
;TYPE:Skirt/Brim
;WIDTH:0.42

So my start gcode is executed and the first layer extruder temperature is correct (245°C)

Then PS changes tool (T0) and set temperature to 230°C (other layers temperature), why??

I don't have any filament start/stop gcode and Tool change Gcode..

Any help is appreciated..

Ciao

Pietro