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Retract question.

Scheduled Pinned Locked Moved
Tuning and tweaking
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  • undefined
    Torro
    last edited by 8 Aug 2021, 17:25

    Hi there,

    Got a nice Hemera and tried to get the retract settings for TPU right.

    Made some test, but no matter what, it´s stringing and blobbing.

    i created a retract test part, sliced it with prusaslicer and added after 10mm commands like M207 S or F

    I didn´t noticed any difference, so i searched the problem and found it.

    In prusaslicer, retract is set to 40mm/s and 0.5mm retract.

    When i do a single "M207" before starting a print, i get the following:

    M207
    Retraction/un-retraction settings: length 2.00/2.00mm, speed 1000/1000mm/min, Z hop 0.00mm

    Then i start the print and typing again M207, the console answers this:

    M207
    Retraction/un-retraction settings: length 2.00/2.00mm, speed 1000/1000mm/min, Z hop 0.00mm

    Where gets the duet2 these settings for retract?!?

    my congig.g:

    ; General preferences
    M80
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves

    M669 K1 ; Select CoreXY mode

    ; Network
    M550 P"MKC" ; Set machine name
    M552 S1 ; Enable network
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Specials

    M307 H2 A-1 C-1 D-1 ; disable the heater functionality

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards X
    M569 P1 S1 ; Drive 1 goes forwards Y
    M569 P2 S1 ; Drive 2 goes forwards Z @ Xmin
    M569 P3 S1 ; Drive 3 goes forwards Z @ Xmax
    M569 P4 S0 ; Drive 4 goes backwards Extruder
    M584 X0 Y1 Z2:3 U3 E4 P3 ; two Z motors connected to driver outputs Z and E1 Hide U
    M350 X16 Y16 Z16 U16 E16 I1 ; Configure microstepping with interpolation
    M92 X80.00 Y80.00 Z160 U160 E394.00 ; Set steps per mm
    M566 X1100.00 Y1100.00 Z12.00 U12.00 E2500.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X30000.00 Y30000.00 Z4000.00 U4000.00 E12000.00 ; Set maximum speeds (mm/min)
    M201 X1200.00 Y1200.00 Z500.00 U500.00 E1000.00 ; Set accelerations (mm/s^2)
    M906 X800.00 Y800.00 Z800.00 U800.00 E1000.00 I40 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S3000 ; Set idle timeout
    ; M556 S100 X0 Y1 Z1 ; Axis Skew Compensation
    M564 H0 S1

    ; Axis Limits
    M208 X0 Y0 Z0 S1 ; Set axis minima
    M208 X210 Y240 Z288 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; Set active high endstops
    M574 Z1 U1 S1

    ; Z-Probe
    M558 P0 H1 F200 T9000 B0 ; Disable Z probe but set dive height, probe speed and travel speed;
    ;G31 P500 X0 Y50 Z1.45
    ;M557 X10:230 Y10:240 S20 ; Define mesh grid

    ; Heaters
    M305 P0 T100000 B4388 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S130 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C
    M301 H1 P33.6 I1.616 D65.8; Hotend PID values
    M307 H1 A294.3 C155.1 D2.8 B0 ; Hotend Heater parameters

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P2 T45:55 H100:101:102 ; Set fan 2 value,
    M912 P0 S-3.5

    ; Tools
    M563 P0 D0 H1 ; 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

    ; Automatic power saving
    M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

    ; Custom settings are not configured

    First lines of a gcode: editor didn´t find ANY M207 commands

    ; generated by PrusaSlicer 2.3.3+win64 on 2021-08-08 at 17:22:24 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
    ; first layer extrusion width = 1.00mm

    M107
    M190 S60 ; set bed temperature and wait for it to be reached
    ;TYPE:Custom
    T0 ; Sets Tool0 as default
    M106 P0 S0 ; Stop Part Cooling Fan
    M109 S220
    G28 ; home all axes
    G91 ; relative mode
    G1 E2 F300 ; Fill Nozzle alt
    G1 E-0,5 F1800 ; Fill Nozzle
    G90 ; absolute Mode
    G21 ; set units to millimeters
    G90 ; use absolute coordinates
    M82 ; use absolute distances for extrusion
    G92 E0
    M572 D0 S0.07
    ;LAYER_CHANGE
    ;Z:0.3
    ;HEIGHT:0.3
    G1 Z0.300 F9000.000
    G1 E-0.50000 F2400.000
    G92 E0
    G1 X46.824 Y102.993 F9000.000
    G1 E0.50000 F1500.000
    M204 S1000
    ;TYPE:Skirt
    ;WIDTH:1
    G1 F427.524
    G1 X48.055 Y102.453 E0.67250
    G1 X50.249 Y101.738 E0.96873
    G1 X51.560 Y101.445 E1.14123
    G1 X52.880 Y101.250 E1.31248
    G1 X55.141 Y101.130 E1.60310
    G1 X154.851 Y101.130 E14.40244
    G1 X157.118 Y101.249 E14.69378

    undefined 1 Reply Last reply 8 Aug 2021, 18:17 Reply Quote 0
    • undefined
      Phaedrux Moderator @Torro
      last edited by Phaedrux 8 Aug 2021, 18:18 8 Aug 2021, 18:17

      @torro said in Retract question.:

      Where gets the duet2 these settings for retract?!?

      You.

      You must define the settings yourself in M207 in config.g or elsewhere before the print starts. The slicer must be configured to use firmware retraction (in prusaslicer its in printer settings page also make sure you're using reprap gcode flavor) so that instead of sending a specific retraction amount in the gcode file, it just sends G10/G11 commands and the firmware will use the values defined in M207 to do the retraction.

      https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M207_Set_retract_length

      Z-Bot CoreXY Build | Thingiverse Profile

      undefined 1 Reply Last reply 9 Aug 2021, 04:02 Reply Quote 0
      • undefined
        tmicke @Phaedrux
        last edited by 9 Aug 2021, 04:02

        @phaedrux @Torro

        Sorry for hijacking the thread
        What are the pro and cons of using firmware retractions?

        To me it seems a lot easier to use the settings in the slicer so you can have different settings for different materials e.g PLA and TPU, rather than changing your config.g. But maybe I’m missing something?

        undefined 1 Reply Last reply 9 Aug 2021, 04:11 Reply Quote 0
        • undefined
          Phaedrux Moderator @tmicke
          last edited by 9 Aug 2021, 04:11

          @tmicke said in Retract question.:

          But maybe I’m missing something?

          Well the nice thing about it is that it's not baked into the sliced file so you can change it on the fly which is great for tuning. You can send a new M207 command or part of it anytime during a print and see how the change affects retraction behavior.

          For different materials there are a few different ways to deal with that. In DWC you can setup different material profiles and load whichever material you're using and it can load settings unique for that material like different acceleration, jerk, retraction, etc.

          https://duet3d.dozuki.com/Wiki/Filaments

          Or if your slicer has a custom gcode section specifically for filaments (like prusa slicer / slic3r) then you could have a custom M207 command there.

          Z-Bot CoreXY Build | Thingiverse Profile

          undefined 1 Reply Last reply 9 Aug 2021, 04:26 Reply Quote 1
          • undefined
            tmicke @Phaedrux
            last edited by 9 Aug 2021, 04:26

            @phaedrux
            That makes a lot of sense, thank you.
            I’m adapting to the wonderful world of RRF and g-codes from more than five years with Marlin 🙂

            undefined 1 Reply Last reply 9 Aug 2021, 06:53 Reply Quote 0
            • undefined
              Torro
              last edited by 9 Aug 2021, 05:58

              OK, thanks.

              1 Reply Last reply Reply Quote 0
              • undefined
                deckingman @tmicke
                last edited by 9 Aug 2021, 06:53

                @tmicke In addition to @Phaedrux 's answer, if you use a mixing hot end, then firmware retraction will retract all filaments whereas slicer retraction will only retract filaments associated with the current tool. This means that filament can be drawn from other inputs rather than the nozzle. So firmware retraction is a must for hot ends which have multiple inputs.

                Ian
                https://somei3deas.wordpress.com/
                https://www.youtube.com/@deckingman

                1 Reply Last reply Reply Quote 1
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