Replaced bed, now have some geometry issues.



  • Hello!

    I replaced my 125mm diameter bed with a 150mm diameter bed, and fixed a new bed.g and now i have a few issues.

    1. I get a few "Probe cannot reach X Y" while calibrating mesh.
    2. I seem to have messed something up so the bed appears do be shifted about +0.5mm on the X axis

    I suppose it makes more sense to start with 2: What would i want to change to offset this via the config?

    Below is my config files, and I can not figure out why i would get errors. I have used R148 for now due to my ofset issue, else the probing missed the bed slightly on the left side.

    6:21:01 PMWarning: Skipping grid point (80.0, 100.0) because Z probe cannot reach it
    Warning: Skipping grid point (100.0, 100.0) because Z probe cannot reach it
    Warning: Skipping grid point (80.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (60.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (40.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (20.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (0.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (-20.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (-40.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (-60.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (-80.0, 120.0) because Z probe cannot reach it
    Warning: Skipping grid point (-40.0, 140.0) because Z probe cannot reach it
    Warning: Skipping grid point (-20.0, 140.0) because Z probe cannot reach it
    Warning: Skipping grid point (0.0, 140.0) because Z probe cannot reach it
    Warning: Skipping grid point (20.0, 140.0) because Z probe cannot reach it
    Warning: Skipping grid point (40.0, 140.0) because Z probe cannot reach it
    109 points probed, mean error -0.022, deviation 0.033
    Height map saved to file heightmap.csv

    ; bed.g file for RepRapFirmware, generated by Escher3D calculator
    ; 10 points, 6 factors, probing radius: 148, probe offset (0, 0)
    G28
    G30 P0 X0.00 Y148.00 Z-99999 H0
    G30 P1 X128.17 Y74.00 Z-99999 H0
    G30 P2 X128.17 Y-74.00 Z-99999 H0
    G30 P3 X0.00 Y-148.00 Z-99999 H0
    G30 P4 X-128.17 Y-74.00 Z-99999 H0
    G30 P5 X-128.17 Y74.00 Z-99999 H0
    G30 P6 X0.00 Y74.00 Z-99999 H0
    G30 P7 X64.09 Y-37.00 Z-99999 H0
    G30 P8 X-64.09 Y-37.00 Z-99999 H0
    G30 P9 X0 Y0 Z-99999 S6

    ; This is a system-generated file - do not edit
    ; Delta parameters
    M665 L360.200 R179.482 H453.925 B120.0 X0.128 Y-0.174 Z0.000
    M666 X-0.397 Y0.053 Z0.344 A0.00 B0.00
    ; Heater model parameters
    M307 H0 A241.5 C325.9 D1.5 S1.00 V12.1 B0
    M307 H1 A263.0 C111.3 D6.3 S1.00 V12.1 B0
    M307 H2 A340.0 C140.0 D5.5 S1.00 V0.0 B0
    M307 H3 A340.0 C140.0 D5.5 S1.00 V0.0 B0
    M307 H4 A340.0 C140.0 D5.5 S1.00 V0.0 B0
    M307 H5 A340.0 C140.0 D5.5 S1.00 V0.0 B0
    M307 H6 A340.0 C140.0 D5.5 S1.00 V0.0 B0
    M307 H7 A340.0 C140.0 D5.5 S1.00 V0.0 B0

    ; Configuration file for Duet WiFi (firmware version 1.20 or newer)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool on Sat Mar 10 2018 00:14:59 GMT+0100 (W. Europe Standard Time)

    ; General preferences
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves
    M665 R179.489 L360.2 B150 H449 X0.746 Y0.761 Z0 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X0.85 Y-0.81 Z-0.04 A0 B0 ; Put your endstop adjustments here, or let auto calibration find them

    ; Network
    M550 PFullMetalDelta ; Set machine name
    M552 S1 ; Enable network
    ;*** Access point is configured manually via M587
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S1 ; Drive 0 X goes forwards
    M569 P1 S1 ; Drive 1 Y goes forwards
    M569 P2 S1 ; Drive 2 Z goes forwards
    M569 P3 S0 ; Drive 3 E0 goes backwards, Zesty Nimble

    ;M569 P3 S1 ; Drive 3 E0 goes backwards, Titan Extruder

    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X200 Y200 Z200

    ;M92 E418.5 ; Set steps per mm (Titan)
    M92 E2855 ; Set steps per mm (Zesty)

    ;M566 X1200 Y1200 Z1200 E1200 ; Set maximum instantaneous speed changes (mm/min) Titan
    M566 X1200 Y1200 Z1200 E40 ; Set maximum instantaneous speed changes (mm/min) Zesty
    M203 X18000 Y18000 Z18000 E1200 ; Set maximum speeds (mm/min)
    ;M201 X1000 Y1000 Z1000 E1000 ; Set accelerations (mm/s^2) Titan
    M201 X1000 Y1000 Z1000 E120 ; Set accelerations (mm/s^2) Zesty
    M906 X1000 Y1000 Z1000 E500 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 Y2 Z2 S1 ; Set active high endstops

    ; Z-Probe
    M558 P5 R0.4 F1000 H5 ; Smart Effector
    G31 P100 X0 Y0 Z-0.1
    M557 R148 S20 ; Define mesh grid

    ; Heaters
    ;M305 P0 T99670 B4471 C8.262085e-8 R4700 ; Set thermistor + ADC parameters for heater 0 Keenovo heater
    M305 P0 T100000 B3950 R4700 ; Set thermistor + ADC parameters for heater 0 Clever3d heater
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C

    ; Fans
    ;M106 P0 S0 I0 F10 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P0 S0 I1 F100 H-1 L0.3 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    ;M106 P2 S1 I0 F500 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P2 I1 H100:101 T45:55 L0.3

    ; Tools
    M563 P0 D0 H1 ; 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

    M572 D0 S0.05 ; Pressure advance

    M912 P0 S-22 ; Temperature offset.

    ; Automatic saving after power loss is not enabled

    ; Custom settings are configured
    M501

    ;Load mesh calibration
    G29 S1



  • And with "Messed up" in regards to the X-shift, i mean "mechanically" in the design of the bottom plate holding the bed. 🙂



  • issue 1 is due to you having a 150 diameter bed but your Bed.G and config.g files are for one of 150mm RADIUS
    issue 2 why worry about a 0.5mm error there it is pretty insignificant unless of course you want to print right to the edge which is not advisable IMHO

    But you are also loading up the config-override file in the config.g with the m501 which is resting your bed size to be 120mm you have 2 options to overcome this first is to delete the override file but then if you have cup and pasted the Pid tune parts you will need to repeat them second method is to just comment out the M665 and M666 lines in that file.



  • @dougal1957 said in Replaced bed, now have some geometry issues.:

    issue 1 is due to you having a 150 diameter bed but your Bed.G and config.g files are for one of 150mm RADIUS
    issue 2 why worry about a 0.5mm error there it is pretty insignificant unless of course you want to print right to the edge which is not advisable IMHO

    But you are also loading up the config-override file in the config.g with the m501 which is resting your bed size to be 120mm you have 2 options to overcome this first is to delete the override file but then if you have cup and pasted the Pid tune parts you will need to repeat them second method is to just comment out the M665 and M666 lines in that file.

    sigh I messed this post up.. My bed is 150mm radius. 300mm dia usable surface. Gah.

    No, i don't want to print right to the edge, just wanted to get the geometry correct. So, maybe defining the bed as 295mm dia isnt such a bad idea then?



  • @dougal1957 said in Replaced bed, now have some geometry issues.:

    But you are also loading up the config-override file in the config.g with the m501 which is resting your bed size to be 120mm you have 2 options to overcome this first is to delete the override file but then if you have cup and pasted the Pid tune parts you will need to repeat them second method is to just comment out the M665 and M666 lines in that file.

    Commenting out the M665 M666 and rerunning calibration seem to have fixed it indeed. I really should have noticed that.

    Thank you!



  • That's the very reason I don't use it in that way very easy to get caught out by it



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