shaking driving curves - DUET 3
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hey all together
I have a weird moving / shaking when driving curves (especially when driving slower- see video)
I tried different jerks, accelarations and microstepping.
The Influence of the printing was very small...may anyone has an idea what I can change?
R.
WhatsApp Video 2021-08-30 at 12.05.39.mp4 WhatsApp Video 2021-08-30 at 12.10.34.mp4
WhatsApp Video 2021-08-30 at 12.10.34.mp4
; Configuration file for Duet 3 (firmware version 3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Mon Aug 02 2021 16:15:35 GMT+0200 (Mitteleuropäische Sommerzeit) ; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"Duet 3" ; set printer name M552 S1 P192.168.2.108 ; Wifi G4 S4 M574 C1 S3 M574 C0 Z0 ; No C Z endstop M915 P1.2 C S0 F0 R1 ; Drives M569 P0.0 S1 ; physical drive 0.0 goes forwards M569 P0.1 S1 ; physical drive 0.1 goes forwards M569 P0.2 S0 ; physical drive 0.2 goes forwards M569 P0.3 S0 ; physical drive 0.2 goes forwards M569 P0.4 S0 ; physical drive 0.2 goes forwards M569 P0.5 S0 ; physical drive 0.2 goes forwards M569 P1.0 S0 ; physical drive 0.2 goes forwards M569 P1.2 S0 ; physical drive 0.2 goes forwards M569 P121.0 S0 ; physical drive 121.0 goes forwards M569 P122.0 S1 ; physical drive 122.0 goes forwards M569 P123.0 S1 ; physical drive 123.0 goes forwards M584 X1.0 Y0.0:0.1 Z0.2:0.3:0.4:0.5 C1.2 E121.0:122.0:123.0 ; set drive mapping M350 X32 Y32 Z16 E16:16:16 I1 ; configure microstepping with interpolation M92 X320.00 Y320.00 Z640.00 C91.022 E409.00:409.00:409.00 ; set steps per mm M566 X100.00 Y100.00 Z60.00 C3000 E3.00:3.00:3.00 ; set maximum instantaneous speed changes (mm/min) M203 X15000.00 Y15000.00 Z800.00 C5000 E6000.00:6000.00:6000.00 ; set maximum speeds (mm/min) M201 X500.00 Y500.00 Z1000.00 C400 E2500.00:2500.00:2500.00 ; set accelerations (mm/s^2) M906 X1300 Y1300 Z2500 C400 E1000:1000:1000 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; Set idle timeout M671 X-80:-80:930:930 Y-80:930:930:-80 S20 ; leadscrews at front left1 and n´back2. back rigth3 and front4 ; Axis Limits M208 X-10 Y-81.4 Z0 S1 ; set axis minima M208 X860 Y890 Z850 S0 ; set axis maxima ; Endstops M574 X2 S1 P"^io3.in" ; configure active-high endstop for high end on X via pin ^io3.in M574 Y2 S1 P"^io1.in" ; configure active-high endstop for high end on Y via pin ^io1.in ; Z probe M558 P5 C"io2.in" H50 F360 I0 T1100 ; Set Z probe type to switch, the axes for which it is used and the dive height + speeds G31 P200 X5 Y30 Z0 ; Set Z probe trigger value, offset and trigger height; Z probe M556 S50 X0 Y0 Z0 ; set orthogonal axis compensation parameters M557 X200:650 Y200:650 S45 ; 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 R0.243 C586.2 D33.87 S1.00 V0 ; 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"121.temp0" Y"thermistor" T100000 B4138 ; configure sensor 1 as PT1000 on pin 121.temp0 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 M143 H1 S250 ; set temperature limit for heater 1 to 250C M308 S2 P"122.temp0" Y"pt1000" R2200 ; configure sensor 2 as PT1000 on pin 122.temp0 M950 H2 C"122.out0" T2 ; create nozzle heater output on 122.out0 and map it to sensor 2 M307 H2 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit M143 H2 S250 ; set temperature limit for heater 2 to 250C M308 S3 P"123.temp0" Y"pt1000" R2200 ; configure sensor 3 as PT1000 on pin 123.temp0 M950 H3 C"123.out0" T3 ; create nozzle heater output on 123.out0 and map it to sensor 3 M307 H3 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit M143 H3 S250 ; set temperature limit for heater 3 to 250C ; Fans M950 F0 C"121.out1" Q25000 ; create fan 0 on pin 121.out1 and set its frequency M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off M563 P0 D0 H1 ; tool uses extruder 0, heater 1 M950 F1 C"121.out2" Q500 ; create fan 1 on pin 121.out2 and set its frequency M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on M563 P0 D0 H1 F1 ; tool uses extruder 0, heater 1 M950 F2 C"122.out1" Q500 ; create fan 2 on pin 122.out1 and set its frequency M106 P2 S1 H-1 ; set fan 2 value. Thermostatic control is turned off M950 F3 C"122.out2" Q500 ; create fan 3 on pin 122.out2 and set its frequency M106 P3 S1 H2 T45 ; set fan 3 value. Thermostatic control is turned on M950 F4 C"123.out1" Q500 ; create fan 4 on pin 123.out1 and set its frequency M106 P4 S1 H-1 ; set fan 4 value. Thermostatic control is turned off M950 F5 C"123.out2" Q500 ; create fan 5 on pin 123.out2 and set its frequency M106 P5 S1 H3 T45 ; set fan 5 value. Thermostatic control is turned on M950 F6 C"out4" Q500 ; create fan 6 on pin out4 and set its frequency M106 P6 S1 H-1 ; set fan 6 value. Thermostatic control is turned off M950 F7 C"out5" Q500 ; create fan 7 on pin out5 and set its frequency M106 P7 S1 H T45 ; set fan 7 value. Thermostatic control is turned on ; Tools M563 P0 D0 H1 F0 ; define tool 0 G10 P0 X30 Y28.25 Z-39.75 ; set tool 0 axis offsets G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C M563 P1 D1 H2 F2 ; 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 M563 P2 D2 H3 F4 ; define tool 2 G10 P2 X0 Y0 Z0 ; set tool 2 axis offsets G10 P2 R0 S0 ; set initial tool 2 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 -
Try other INFILL settings in your slicer.
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@dutti I haven't watched the videos but I can almost guarantee that the behaviour you describe is due to the extremely low instantaneous speed change threshold (jerk) - especially the extruders which have to slow down to 3.0 mm/minute (or 0.05mm/sec) at the end of every small segment (which is how curves are formed). I use 900 for XY and 3600 for the extruders (you might as well set extruder jerk to be silly high as it it only affects things if it's too low).
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@tecno
was without infill.... -
@deckingman
Ok give me a try.
I want to avoid shaking with low insta speed changes but ok.... -
@deckingman
thanks it´s working -
@dutti Glad it's fixed - I thought that would do the trick.
"Jerk" is an odd term as applied to 3D printing - that's why it's referred to as instantaneous speed change in RepRap firmware. But technically, there is no such thing as instantaneous speed change - it is physically impossible, so lets stick with the term "jerk".
Without such a setting, every move would start from a speed of zero, accelerate up to the required speed, then decelerate back to zero speed. But curves are made up of tiny segments of individual moves so if the print head had to start and stop for each of those tiny segments then the overall speed would be very slow. Hence we use "Jerk" which is the speed threshold that one move ends and the next one starts without coming to a complete stop in between each move.
Extruders are treated like axes so every move comprises XY and E (and maybe Z as well). Those XY and E moves all have to be synchronised so that they all start and end at the same time. So with a very low extruder "jerk" setting, the extruder has to slow right down at the end of each move but because X and Y have to be synchronised, they too have to slow right down to keep them synchronised. That's why you had the problem.
