Problems leveling my delta.

  • Hello all, I'm hoping that someone here can help me out in my time of need. I'm going nuts trying to figure out what could be the cause of my Delta printer having some pretty severe "dips" in front of each tower. Printing small things, everything comes out great for the most part, but when things start getting larger then the dips are much more noticeable, and the infill and top/bottom layer don't quite touch the perimeters. The printer is a TEVO Little Monster that I have converted to run off a duet wifi and 360mm Haydn magball arms. Using 6 factor calibration too, but doesn't really seem to change much from 3-6 factors. Also, I've made sure everything is pretty much spot on square with a machinists square, and belt tension is pretty tight. I have ordered a Duet Smart Effector which will be here tomorrow, so I can rule out the BlTouch as a culprit.

    Here is my config

    ; General preferences
    M111 S0 ; Debugging off
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves
    M555 P1 ; Set firmware compatibility to look like RepRapFirmare
    M665 R157 L360 B130 H530 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X-0.274 Y0.289 Z-0.015 A-0.11 B0.14 ; Put your endstop adjustments here, or let auto calibration find them
    M208 Z0 S1 ; Set minimum Z

    ; Endstops
    M574 X2 Y2 Z2 S1 ; Define active high microswitches
    M558 P1 X0 Y0 Z0 H5 F120 T6000 ; Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
    M557 R130 S20 ; Define mesh grid

    ; BL-Touch
    M307 H3 A-1 C-1 D-1 ; reserve pin 21 for M42 or servo use
    M558 P4 X0 Y0 Z1 H3 F200 T5000
    G31 P25 X0 Y0 Z0.1 ; Set Z probe trigger value, offset and trigger height

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M350 E32 I0 ; Configure microstepping without interpolation
    M350 X32 Y32 Z32 I1 ; Configure microstepping with interpolation
    M92 X160 Y160 Z160 E871 ; Set steps per mm
    M566 X1200 Y1200 Z1200 E3000 ; Set maximum instantaneous speed changes (mm/min)
    M203 X39960 Y39960 Z39960 E3000 ; Set maximum speeds (mm/min)
    M201 X1000 Y1000 Z1000 E1500 ; Set accelerations (mm/s^2)
    M906 X1800 Y1800 Z1800 E1500 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Heaters
    M143 S285 ; Set maximum heater temperature to 285C
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4607 C8.950070e-8 R4700 ; Set thermistor + ADC parameters for heater 0
    M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1

    ; 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

    ; Network
    M550 PLittle Monster ; Set machine name
    M551 Pxxxxx ; Set password
    M552 S1 ; Enable network
    M587 S"xxxxxx" P"xxxxx" ; Configure access point. You can delete this line once connected
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; Custom settings are not configured

    ; Miscellaneous
    M501 ; Load saved parameters from non-volatile memory

    Also, My bed.g

    ; called to perform automatic delta calibration via G32
    ; generated by RepRapFirmware Configuration Tool on Mon May 22 2017 22:56:20 GMT-0400 (Eastern Daylight Time)

    ; Clear any bed transform

    ; 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
    ; 16 points, 6 factors, probing radius: 120, probe offset (-10, 12)
    M98 Pdeployprobe.g
    G30 P0 X0.00 Y108.78 Z-99999 H0.763
    G30 P1 X74.81 Y89.16 Z-99999 H0.524
    G30 P2 X118.18 Y20.84 Z-99999 H0.152
    G30 P3 X103.92 Y-60.00 Z-99999 H0.050
    G30 P4 X41.04 Y-112.76 Z-99999 H0.054
    G30 P5 X-41.04 Y-112.76 Z-99999 H0.270
    G30 P6 X-100.88 Y-58.24 Z-99999 H0.507
    G30 P7 X-107.18 Y18.90 Z-99999 H0.624
    G30 P8 X-68.25 Y81.34 Z-99999 H0.717
    G30 P9 X0.00 Y49.52 Z-99999 H0.480
    G30 P10 X51.96 Y30.00 Z-99999 H0.290
    G30 P11 X51.96 Y-30.00 Z-99999 H0.145
    G30 P12 X0.00 Y-60.00 Z-99999 H0.200
    G30 P13 X-48.32 Y-27.90 Z-99999 H0.420
    G30 P14 X-41.65 Y24.05 Z-99999 H0.500
    G30 P15 X0 Y0 Z-99999 S6
    M98 Pretractprobe.g
    ; 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)

    M98 Pretractprobe.g

    G1 X0 Y0 Z150 F15000
    G29 S1

    Sorry for all the formatting also. 🙂0_1527800792131_Screen Shot 2018-05-31 at 1.30.13 PM.png

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  • administrators

    Did you resolve the problem?

  • Looking at the map, my first reaction was "inconsistent probe hardware". But... if you are seeing this in prints...

    So, let's figure out if this is the bed, or the carriages, or something entirely different.

    What is the bed? Glass? Aluminum? Is there a plastic coating, PEI or similar? And the real question: Put a really good steel straightedge across the bed and see if you see the dips and peaks.

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