Circles looks like squares



  • 20200329_143506.jpg 20200329_143402.jpg

    Hello,

    my name ist Tom and a build a new Printer.
    I´m using RRF 3.01 and a Duet Wifi 2.

    After some prints and Calibrations i saw a major problem with printed circles.
    They just look like squares.

    What i tried:
    -Tension of belts
    -accleration between 800 to 2000 (got a direct dual drive Bondtech with e3d chimera wich means a heavy weight)
    -jerk between 100 to 1200
    -printed with cura and simplify3D

    I have really no clue about what issues are responsible for these problems.
    sry for bad english i´m not a native speaker and thans for some ideas.

    This is my config.

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Sun Mar 01 2020 21:02:39 GMT+0100 (Mitteleuropäische Normalzeit)
    
    ; General preferences
    G90                                                    ; send absolute coordinates...
    M83                                                    ; ...but relative extruder moves
    M550 P"Tom_3D"                                         ; set printer name
    
    ; Network
    M552 S1                                                ; enable network
    M586 P0 S1                                             ; enable HTTP
    M586 P1 S1                                             ; enable FTP
    M586 P2 S1                                             ; enable Telnet
    
    ; Drives
    M569 P0 S0                                             ; physical drive 0 goes forwards
    M569 P1 S0                                             ; physical drive 1 goes backwards
    M569 P2 S1                                             ; physical drive 2 goes forwards
    M569 P3 S1                                             ; physical drive 3 goes backwards
    M569 P4 S0                                             ; physical drive 4 goes forwards
    M584 X0 Y1 Z2 E3:4                                     ; set drive mapping
    M350 X256 Y256 Z256 E256:256 I0						   ; configure microstepping without interpolation
    M92 X474.47 Y474.47 Z12738.00 E6848.10:6848.10       	   ; set steps per mm 										M92 X474.00 Y371.00 Z12738.00 E415.00:415.00 
    M566 X400.00 Y400.00 Z180.00 E120.00:120.00  	       ; set maximum instantaneous speed changes (mm/min)		M566 X900.00 Y900.00 Z12.00 E120.00:120.00   
    M203 X12000.00 Y12000.00 Z1020.00 E6000.00:6000.00      ; set maximum speeds (mm/min)							 M203 X15000.00 Y15000.00 Z600.00 E1200.00:1200.00  
    M201 X969.72 Y969.72 Z600.00 E2000.00:2000.00          ; set accelerations (mm/s^2)								M201 X3035.57 Y3035.57 Z2500.00 E2000.00:2000.00
    M906 X2500 Y2500 Z2100 E650:650 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 X416 Y400 Z365 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 S2                                             ; configure Z-probe endstop for low end on Z
    
    ; Z-Probe
    M558 P1 C"zprobe.in" H5 F120 T12000                    ; set Z probe type to unmodulated and the dive height + speeds
    G31 P500 X0 Y60 Z1.20                                   ; set Z probe trigger value, offset and trigger height
    M557 X70:350 Y70:350 S56                               ; define mesh grid	G31 P500 X0 Y60 Z2.5                                   ; set Z probe trigger value, offset and trigger height
    																														;M557 X68:348 Y0:340 S56 
    
    
    ; 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 S300                                           ; set temperature limit for heater 1 to 300C
    M307 H1 B0 S1.00                                       ; disable bang-bang mode for heater  and set PWM limit
    M308 S2 P"e1temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 2 as thermistor on pin e1temp
    M950 H2 C"e1heat" T2                                   ; create nozzle heater output on e1heat and map it to sensor 2
    M143 H2 S300                                           ; set temperature limit for heater 2 to 300C
    M307 H2 B0 S1.00                                       ; disable bang-bang mode for heater  and set PWM limit
    
    ; Fans
    M950 F0 C"fan2" Q500                                   ; create fan 0 on pin fan0 and set its frequency
    M106 P0 C"Bauteil_Fan" S0 H-1                          ; set fan 0 name and value. Thermostatic control is turned off
    
    ; Tools
    M563 P0 S"E0_links" 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"E1_rechts" 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
    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
    


  • Look here https://forum.duet3d.com/topic/15175/oddly-shaped-holes
    There are suggestions that can improve your prints and help to found the right culprit.
    There are several aspect that can conduce at that phenomenon of squared circles.
    You'll have to check them all.


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