Dual Extruder from Bontech (x2) and the Duet 3 HC6 + HC3



  • Good evening,

    I can't imagine, how the BMG-X2 is working with the Duet-combination mentioned above... The are 2 nozzles with a defined distanstance. How can I tell the firmware, that there are 2 extruders? And how looks a gcode for that case? The slicer software must also support the BMG-X2... Is there somebody out there with a similar combination?

    Thanks, Pierre


  • Moderator

    @medicusdkfz RepRapFirmware on Duet electronics can support as many tools as you can connect to the board, and has done since it's inception. If you have a 6HC and 3HC, you have 9 stepper motor connections, and at least 6 extruder heater connections (I think), so connecting a BMG-X2 is no problem, and can probably be done just using the 6HC. You define the heaters, temperature sensors and extruders for each tool, and the offsets, in the configuration file. You can also define actions that happen on tool changes in macros. Slicers have supported multiple tools for a long time, too.

    Ian



  • Thank you very much...


  • Moderator

    The web configurator lets you define the extruder motors and heaters and then assign them to tools and edit the offsets.

    https://configtool.reprapfirmware.org/Start

    Here's what I got:

    ; Configuration file for Duet 3 (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Thu Jul 23 2020 14:24:47 GMT-0600 (Central Standard Time)
    
    ; General preferences
    G90                                                ; send absolute coordinates...
    M83                                                ; ...but relative extruder moves
    M550 P"My Printer"                                 ; set printer name
    
    ; Network
    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 P0.0 S1                                       ; physical drive 0.0 goes forwards
    M569 P0.1 S1                                       ; physical drive 0.1 goes forwards
    M569 P0.2 S1                                       ; physical drive 0.2 goes forwards
    M569 P0.3 S1                                       ; physical drive 0.3 goes forwards
    M569 P0.4 S1                                       ; physical drive 0.4 goes forwards
    M584 X0.0 Y0.1 Z0.2 E0.3:0.4                       ; 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
    M566 X900.00 Y900.00 Z12.00 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 Z20.00 E250.00:250.00         ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E800:800 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 X230 Y210 Z200 S0                             ; set axis maxima
    
    ; Endstops
    M574 X1 S1 P"io0.in"                               ; configure active-high endstop for low end on X via pin io0.in
    M574 Y1 S1 P"io1.in"                               ; configure active-high endstop for low end on Y via pin io1.in
    M574 Z1 S1 P"io2.in"                               ; configure active-high endstop for low end on Z via pin io2.in
    
    ; Z-Probe
    M558 P0 H5 F120 T6000                              ; disable Z probe but set dive height, probe speed and travel speed
    M557 X15:215 Y15:195 S20                           ; define mesh grid
    
    ; Heaters
    M308 S0 P"temp0" Y"thermistor" T100000 B4138       ; configure sensor 0 as thermistor on pin temp0
    M950 H0 C"out0" T0                                 ; create bed heater output on out0 and map it to sensor 0
    M307 H0 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 S120                                       ; set temperature limit for heater 0 to 120C
    M308 S1 P"temp1" Y"thermistor" T100000 B4138       ; configure sensor 1 as thermistor 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
    M308 S2 P"temp2" Y"thermistor" T100000 B4138       ; configure sensor 2 as thermistor on pin temp2
    M950 H2 C"out2" T2                                 ; create nozzle heater output on out2 and map it to sensor 2
    M307 H2 B0 S1.00                                   ; 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 S1 H1:2 T45                                ; set fan 1 value. Thermostatic control is turned on
    
    ; Tools
    M563 P0 S"first tool" 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
    M563 P1 S"second tool" D1 H2 F0                    ; 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
    M575 P1 S1 B57600                                  ; enable support for PanelDue
    M501                                               ; load saved parameters from non-volatile memory
    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
    

    And the config.json file is here if you want to load it in the configurator yourself to edit.
    config.json


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