Delta calibrate x and y too small on calibration cube 20mm



  • To whom it may concern,

    HELP PLEASE.

    I have been calibrating my Anycubic Predator Delta for a few days now, Fun stuff.
    I have the Hayden Mag ball arms and a smart effector with a e3d hot end.
    Found the trigger height, auto calibration 6 point and made a bed file.

    I have successfully printed a few calibration cubes first the wall thickness was too much so I followed the youtube way of fixing the steps in cura and it is almost bang on .4mm walls very pleased, However the actual cube dimension are off.

    The y is 18.20
    x is 18.12
    z = 20mm

    How to fix I put in the rod length as the mag arms come with a sticker 440.47.
    Let auto calibrate do the radius after a rough measurement.

    The prints are okay however I need way better dimensional accuracy Please help solve this.

    Kind regards,

    Grant.



  • @gmang73 said in Delta calibrate x and y too small on calibration cube 20mm:

    The y is 18.20
    x is 18.12

    this is to much.
    there must be a wrong setting somewhere.

    post your config and overwrite

    also the bed.g



  • Config.g

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.2.2 on Fri Jan 29 2021 08:44:52 GMT+1000 (Australian Eastern Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"ANYCUBIC PREDATOR" ; set printer name
    M665 R219.292 L440.470 H418.938 B185.0 x0 y0 z0 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X-0.42 Y0.17 Z0.25 ; put your endstop adjustments here, or let auto calibration find them

    ; Network
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M569 P0 S0 ; physical drive 0 goes forwards
    M569 P1 S0 ; physical drive 1 goes forwards
    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 Y80 Z80 E415 ; set steps per mm
    M566 X3000 Y3000 Z3000 E3000 ; set maximum instantaneous speed changes (mm/min)
    M203 X12000.00 Y12000.00 Z12000.00 E1200.00 ; set maximum speeds (mm/min)
    M201 X9000.00 Y9000.00 Z9000.00 E6000.00 ; set accelerations (mm/s^2)
    M906 X1000 Y1000 Z1000 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 Z0 S1 ; set minimum Z

    ; Endstops
    M574 X2 S1 P"xstop" ; configure active-high endstop for high end on X via pin xstop
    M574 Y2 S1 P"ystop" ; configure active-high endstop for high end on Y via pin ystop
    M574 Z2 S1 p"zstop" ; configure Z-probe endstop for high end on Z

    ; Z-Probe
    M558 P5 R0.4 C"zprobe.in+zprobe.mod" H3 F500 T6000 ; set Z probe type to effector and the dive height + speeds
    G31 P50 X0 Y0 Z-0.16 ; set Z probe trigger value, offset and trigger height
    M557 R85 S20 ; define mesh grid

    ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; 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
    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
    M143 H0 S120 ; set temperature limit for heater 0 to 120C
    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
    M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
    M143 H1 S280 ; set temperature limit for heater 1 to 280C

    ; Fans
    M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
    M106 P1 S1 H1 T45 ; set fan 1 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

    ; Custom settings are not defined

    ; Miscellaneous
    M575 P1 S1 B57600 ; enable support for PanelDue
    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

    Config override

    ; config-override.g file generated in response to M500 at 2021-02-07 15:04
    ; This is a system-generated file - do not edit
    ; Delta parameters
    M665 L440.470:440.470:440.470 R219.130 H418.830 B185.0 X-0.238 Y0.447 Z0.000
    M666 X-0.458 Y0.127 Z0.331 A0.00 B0.00
    ; Heater model parameters
    M307 H0 R0.382 C272.644:272.644 D1.13 S1.00 V23.5 B0
    M307 H1 R6.558 C203.782:203.782 D3.99 S1.00 V23.8 B0
    ; Workplace coordinates
    G10 L2 P1 X0.00 Y0.00 Z0.00
    G10 L2 P2 X0.00 Y0.00 Z0.00
    G10 L2 P3 X0.00 Y0.00 Z0.00
    G10 L2 P4 X0.00 Y0.00 Z0.00
    G10 L2 P5 X0.00 Y0.00 Z0.00
    G10 L2 P6 X0.00 Y0.00 Z0.00
    G10 L2 P7 X0.00 Y0.00 Z0.00
    G10 L2 P8 X0.00 Y0.00 Z0.00
    G10 L2 P9 X0.00 Y0.00 Z0.00
    M486 S-1



  • and your bed.g



  • ; bed.g
    ; called to perform automatic delta calibration via G32
    ;
    ; generated by RepRapFirmware Configuration Tool v3.2.2 on Fri Jan 29 2021 08:44:51 GMT+1000 (Australian Eastern Standard Time)
    M561 ; clear any bed transform
    ; home all towers
    ; Probe the bed at 3 peripheral and 3 halfway points, and perform 6-factor auto compensation
    ; Before running this, you should have set up your Z-probe trigger height to suit your build, in the G31 command in config.g.
    ; bed.g file for RepRapFirmware, generated by Escher3D calculator
    ; 10 points, 6 factors, probing radius: 150, probe offset (0, 0)
    ; bed.g file for RepRapFirmware, generated by Escher3D calculator
    ; 13 points, 6 factors, probing radius: 150, probe offset (0, 0)
    ; bed.g file for RepRapFirmware, generated by Escher3D calculator
    ; 13 points, 6 factors, probing radius: 80, probe offset (0, 0)
    G30 P0 X0.00 Y80.00 Z-99999 H0
    G30 P1 X69.28 Y40.00 Z-99999 H0
    G30 P2 X69.28 Y-40.00 Z-99999 H0
    G30 P3 X0.00 Y-80.00 Z-99999 H0
    G30 P4 X-69.28 Y-40.00 Z-99999 H0
    G30 P5 X-69.28 Y40.00 Z-99999 H0
    G30 P6 X0.00 Y40.00 Z-99999 H0
    G30 P7 X34.64 Y20.00 Z-99999 H0
    G30 P8 X34.64 Y-20.00 Z-99999 H0
    G30 P9 X0.00 Y-40.00 Z-99999 H0
    G30 P10 X-34.64 Y-20.00 Z-99999 H0
    G30 P11 X-34.64 Y20.00 Z-99999 H0
    G30 P12 X0 Y0 Z-99999 S6
    g29 s2
    ; Use S-1 for measurements only, without calculations. Use S4 for endstop heights and Z-height only. Use S6 for full 6 factors
    ; If your Z probe has significantly different trigger heights depending on XY position, adjust the H parameters in the G30 commands accordingly. The value of each H parameter should be (trigger height at that XY position) - (trigger height at centre of bed)



  • bed.gif



  • @gmang73 said in Delta calibrate x and y too small on calibration cube 20mm:

    g29 s2

    remove that. that makes no sense here.

    just for testing change the S6 to S9 and run the auto calibration and post the output



  • calibration cube.png



  • G29
    

    Warning: the height map has a substantial Z offset. Suggest use Z-probe to establish Z=0 datum, then re-probe the mesh.
    61 points probed, min error 0.103, max error 0.617, mean 0.356, deviation 0.095
    Height map saved to file 0:/sys/heightmap.csv



  • 07/02/2021, 4:40:22 pm G32
    Calibrated 9 factors using 13 points, (mean, deviation) before (0.353, 0.120) after (1.120, 0.068)



  • @gmang73 said in Delta calibrate x and y too small on calibration cube 20mm:

    Warning: the height map has a substantial Z offset. Suggest use Z-probe to establish Z=0 datum, then re-probe the mesh.

    you want to run G30 before G29

    post the new M666 and M667 after the G32



  • This post is deleted!


  • 07/02/2021, 4:53:06 pm G29
    61 points probed, min error -0.096, max error 0.086, mean -0.008, deviation 0.038
    Height map saved to file 0:/sys/heightmap.csv
    07/02/2021, 4:51:55 pm G32
    Calibrated 9 factors using 13 points, (mean, deviation) before (-0.020, 0.031) after (0.000, 0.028)Bed.png


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