Volumetric extrusion = massive overextrusion!
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I have a CoreXY-Printer with duet ethernet and use volumetric extrusion because with Cura and g-code flavor setting "marlin (volumetric)" I can use the firmware retraction feature of RRF (3.01-RC3).
But even though I configured...
M200 D1.75 ; set all extruder filament diameters to 1.75mm
... I get an overextrusion of more than 2 times the wall thickness setting (0.4 - actual thickness: about 1mm)My e-steps are configured correctly and now I don't know anymore where to look for the error.
Here my duet config.g:
; Configuration file for Duet WiFi (firmware version 3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat Mar 14 2020 22:42:45 GMT+0100 (Mitteleuropäische Normalzeit) ; General preferences M111 S1 ; Debugging on/off 0/1 G21 ; Work in millimetres G90 ; send absolute coordinates... ;M83 ; ...but relative extruder moves, oder? NO: https://duet3d.com/forum/thread.php?id=1190, https://betrue3d.dk/category/duet-wifi/page/2/ M550 P"Davids Ender-4" ; set printer name M667 S1 ; select CoreXY mode ; 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 S1 ; physical drive 0 goes backwards M569 P1 S1 ; physical drive 1 goes backwards M569 P2 S0 ; physical drive 2 goes forwards M569 P3 S0 ; physical drive 3 goes forwards M584 X0 Y1 Z2 E3 ; set drive mapping M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X80.24 Y80.24 Z400.00 E96.295 ; set steps per mm M566 X900.00 Y900.00 Z20.00 E600.00 ; set maximum instantaneous speed changes (mm/min) M203 X18000.00 Y18000.00 Z480.00 E1200.00 ; set maximum speeds (mm/min) M201 X1000.00 Y1000.00 Z100.00 E250.00 ; set accelerations (mm/s^2) M906 X800 Y800 Z500 E800 I50 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; Set idle timeout ; Axis Limits M208 X-4 Y-7 Z0 S1 ; set axis minima M208 X215 Y215 Z300 S0 ; set axis maxima ; Endstops M574 X1 S1 P"!xstop" ; configure active-high endstop for low end on X via pin xstop M574 Y1 S1 P"ystop" ; configure active-high endstop for low end on Y via pin ystop M574 Z1 S1 P"zstop" ; configure active-high endstop for low end on Z via pin zstop ; Z-Probe M558 P0 H2 F120 T7200 ; disable Z probe but set dive height, probe speed and travel speed M557 X15:200 Y15:175 S20 ; define mesh grid ; Heaters M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin bedtemp M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0 M143 H0 S120 ; set temperature limit for heater 0 to 120C 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 M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; 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 M143 H1 S285 ; set temperature limit for heater 1 to 285C M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit ; Fans M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency M106 P0 C"Part-Fan" S0 H-1 ; set fan 0 name and value. Thermostatic control is turned off M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency M106 P1 C"Hotend-Fan" S1 H1 T45 ; set fan 1 name and value. Thermostatic control is turned on M950 F2 C"fan2" Q500 ; create fan 2 on pin fan2 and set its frequency M106 P2 S0 H1 T45 ; set fan 2 value. Thermostatic control is turned on ; Tools M563 P0 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 M200 D1.75 ; set all extruder filament diameters to 1.75mm ; Custom settings: M572 D0 S0.3 ; Miscellaneous T0 ; select first toolAnd here my Cura "Start G-code":
G21 ; metric values, G-code flavor Marlin (Volumetric) for Firmware Retraction... G90 ; absolute positioning M82 ; set extruder to absolute mode G28 ; home all axes G1 X0 Y10 Z0.5 F3000 ; get ready to prime G92 E0 ; reset extrusion distance G1 X160 E20 F600 ; prime nozzleMay anyone can guide me to a solution for this problem.
Thank you. -
There's no reason you can't use firmware retraction when selecting reprap flavour in Cura. I do.
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I've never used volumetric extrusion before, but do you have to set the E steps per mm to be in volumetric units?
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@Phaedrux said in Volumetric extrusion = massive overextrusion!:
There's no reason you can't use firmware retraction when selecting reprap flavour in Cura. I do.
I can't find a setting in cura that outputs G10/G11 when g-code-flavour reprap is set. Could you tell me where to set this option?
@bot said in Volumetric extrusion = massive overextrusion!:
I've never used volumetric extrusion before, but do you have to set the E steps per mm to be in volumetric units?
Can't imagine this is the case...
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Yeah, that wouldn't make sense because it would negate the need for the filament diameter setting.
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You'll need the Printer Settings plugin from the Cura plugin marketplace. That will add another menu in the settings bar. That's where you'll find the option for firmware retraction. I should have remembered that earlier. Sorry.
