I'm facing (two current) issues and don't know if they are related. In an effort to solve the issue of my printer not printing arcs/curves properly:
That should be a figure eight with arcs connecting the two 100mm outside circles
There's some issue with the X axis that seems to not complete the full arc.
Will print squares without a problem:
So I thought I'd see if the firmware needed a refresh because going through the X drive system (helical rack and pinion and shielded cable to the Duet 3 board) I couldn't see an issue <apart from ever finer tuning the step calibration obviously>.
Now on another printer, running the same FW , the hourglass prints fine, curves in all the right places, same slicer, practically the same settings apart from build volume.
I've tried changing; instantaneous speed, steps/mm in conjunction with microstepping, my t shirt, nada. Doesn't seem to affect the shape or placement of the dents.
My next thought was the wiring between the X stepper and the expansion board but moving a curved part around the bed produces similar errors.
Any ideas why my circles might be dented and jerky would be very helpful.
Posting config in case:
; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.7 on Tue Nov 17 2020 15:11:50 GMT+0000 (Greenwich Mean Time)
; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Usain" ; set printer name
; Drives
M569 P0.0 S1 ; physical drive 0.0 goes (right Y motor) forwards Y1
M569 P1.2 S1 ; physical drive 1.2 goes (left Y motor) forwards Y2
M569 P0.2 S1 ; physical drive 0.3 (right) goes forwards Z1
M569 P0.3 S0 ; physical drive 0.2 (left) goes forwards Z1
M569 P0.4 S0 ; physical drive 0.2 goes forwards U
M569 P1.0 S0 ; physical drive 1.0 goes forwards X1
M569 P1.1 S0 ; physical drive 1.1 goes forwards E1
;M569 P1.2 S1 ; physical drive 1.1 goes forwards E1
M584 X1.0 Y0.0:1.2 Z0.2:0.3 E1.1:0.4 ; set drive mapping
;M671 X-60:790 Y0:0 S0.5 ; leadscrews at left (connected to 0.2) and right (connected to 0.3) of X axis
M350 X8 Y8 Z16 E16 I1 ; configure microstepping with interpolation
M92 X19.14495 Y20.3065 Z1711.63 E500 ; set steps per mm X38.2899 Y40.613
M566 X1800.00 Y1850.00 Z80.00 E520.00 P1 ; set maximum instantaneous speed changes (mm/min)
M203 X95000.00 Y48000.00 Z580.00 E1800.00 ; set maximum speeds (mm/min)
M201 X1550.00 Y1400.00 Z20.00 E150.00 ; set accelerations (mm/s^2)
M906 X2300 Y2450 Z2200 E1000 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 X720 Y2800 Z800 S0 ; set axis maxima
M564 H1 S1
; Endstops
M574 X1 S1 P"1.io0.in" ; configure active-high endstop for low end on X via pin 1.io0.in
M574 Y1 S1 P"!io0.in" ; configure active-high endstop for low end on Y via pin io0.in
M574 Z1 S2 ;P"1.io1.in"
M574 Z1 S1 P"!io1.in" ; configure Z active-high endstop for low end pin 1.io1.in
; Filament Sensor
;M591 D0 P5 C"1.io3.in" R40:120 S0 ; Duet3D laser sensor for extruder drive 0, connected to endstop input 3 (E0), tolerance 40 to 120%, 3mm comparison length, disabled
; Z-Probe
;M558 P8 C"1.io2.in" R0.4 I1 S0.1 A5 H8 F320 T6000 ; set Z probe type to modulated and the dive height + speeds
;G31 P500 X30 Y5 Z0.275 ; set Z probe trigger value, offset and trigger height
;M557 X15:690 Y15:1800 S55 ; define mesh grid
; Heaters
M308 S0 P"temp0" Y"pt1000" A"bed Heat1" ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out1" T0 ; create bed heater output on out0 and map it to sensor 0
M307 H0 A22.7 C156.4 D4.0 S1.0 ; disable bang-bang mode for the bed heater and set PWM limit
M140 P0 H0 ; map heated bed 0 to heater 0
M143 H0 S90 ; set temperature limit for heater 0 to 90C
M308 S1 P"temp1" Y"pt1000" A"bed Heat2" ; configure sensor 1 as pt1000 on pin temp1 (T100000 B4138)
M950 H1 C"out2" T1 ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 A22.7 C156.4 D4.0 S1.0 ; disable bang-bang mode for the bed heater and set PWM limit
M140 P1 H1 ; map heated bed 1 to heater 1
M308 S2 P"temp2" Y"thermistor" A"bed Heat3" T100000 B4138 ; configure sensor 2 as thermistor on pin temp2
M950 H2 C"out3" T2 ; create nozzle heater output on out2 and map it to sensor 2
M307 H2 A32.7 C156.4 D4.0 S1.0 ; disable bang-bang mode for the bed heater and set PWM limit
M140 P2 H2 ; map heated bed 1 to heater 1
M308 S3 P"1.temp0" Y"pt1000" A"Prime_Heater_100W" ; configure sensor 3 as a pt1000 on pin 1.temp0 (T100000 B4138)
M950 H3 C"1.out0" T3 ; create nozzle heater output on 1.out0 and map it to sensor 3
M307 H3 A590 C962.6 D5.5 S0.5 V24.3 B0 ; disable bang-bang mode for heater and set PWM limit
M308 S4 P"1.temp1" Y"pt1000" A"Prime_Heater_60W" ; configure sensor 4 as thermistor on pin 1.temp1
M950 H4 C"1.out1" T4 ; create nozzle heater output on 1.out1 and map it to sensor 4
M307 H3 A590 C962.6 D5.5 S0.5 V24.3 B0 ; disable bang-bang mode for heater and set PWM limit
; Fans
M950 F0 C"1.out6" Q500 ; create fan 0 on pin 1.out6 and set its frequency
M106 P0 S0.55 H3 C"Plastic" ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"1.out7" Q500 ; create fan 1 on pin 1.out7 and set its frequency
M106 P1 S1 H-1 C"part_cooling_2" ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"1.out8" Q500 ; create fan 2 on pin 1.out8 and set its frequency
M106 P2 S1 H-1 C"part_cooling" ; set fan 1 value. Thermostatic control is turned off
; Tools
M563 P0 S"Prime_Extruder_100W" D0 H3 F1:2 ; 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"Prime_Extruder_60W" D0 H4 F1:2 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P1 R0 S0 ; set initial tool 0 active and standby temperatures to 0C
;M567 P4 E0.5:0.50 ; set mixing ratio for tool 0
;M563 P1 S"Filament Feed" D1 H3
;G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
;G10 P0 R0 S0
;M563 P2 S"Prime_Support_Extruder" D2 H5 F3 ; 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