Bltouch Error: Z probe was not triggered during probing move



  • i'm trying to get my duet 2 WiFi working on my tevo tornado, and am running into issues with the BLTouch

    everything seems to be working, but when I have it probe the bed I get
    "G28
    Error: Z probe was not triggered during probing move"
    but it sure looks to me like it was.

    it sure looks like it detects the bed, it hops back up, probes the bed again and the printer reports that it is homed.
    it's really confusing.

    any suggestions where to look / what to change?

    here's my wall-o-configs

    Firmware Name: RepRapFirmware for Duet 2 WiFi/Ethernet
    Firmware Electronics: Duet WiFi 1.02 or later
    Firmware Version: 2.03beta3 (2019-03-25b6)
    WiFi Server Version: 1.22
    Web Interface Version: 1.22.6

    config-override.g

    empty

    Config.g

    ; Configuration file for Duet WiFi (firmware version 1.21)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2 on Wed Apr 03 2019 15:50:04 GMT-0500 (Central Daylight Time)

    ; General preferences
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves

    ; Network
    M550 P"PrinterOfThings" ; Set machine name
    M552 S1 ; Enable network
    M586 P0 S1 ; Enable HTTP
    ;M586 P1 S1 ; Enable FTP
    ;M586 P2 S1 ; Enable Telnet

    ; Drives
    M569 P0 S0 ; Drive 0 goes Backwards
    M569 P1 S0 ; Drive 1 goes Backwards
    M569 P2 S0 ; Drive 2 goes Backwards
    M569 P3 S0 ; Drive 3 goes Backwards
    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E615.4 ; Set steps per mm
    M566 X900.00 Y900.00 Z12.00 E120.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z6000.00 E1200.00 ; Set maximum speeds (mm/min)
    M201 X200.00 Y200.00 Z100.00 E250.00 ; Set accelerations (mm/s^2)
    M906 X800.00 Y800.00 Z800.00 E800.00 I10 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 Z-20 S1 ; Set axis minima
    M208 X300 Y300 Z400 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; Set active low and disabled endstops
    M574 Z1 S2 ; Define Z to use Probe. Home to Min

    ; Z-Probe
    ; BLTouch - Heaters
    M307 H7 A-1 C-1 D-1 ; Disable the 7th Heater to free up PWM channel 5 on the Duex board.
    M557 X15:285 Y15:285 S50 ; Define mesh grid
    M558 P9 H5 F100 T6000 A5 R0.2 ; P9 for BLTouch, dive height 5mm, probe at 100mm/min, travel 6000mm/min, up to 5 probes, pause 0.1s
    G31 X-45 Y-5 Z-5.25 P25 ; probe XY offset and Z trigger height and trigger value
    M557 X5:205 Y5:165 S20 ; Define mesh grid

    ; Heaters
    M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S265 ; Set temperature limit for heater 1 to 265C

    ; 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 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P2 S0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; 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

    ; Automatic power saving
    M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

    ; Custom settings are not configured

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

    Deployprobe.g

    M280 P7 S10 I1

    Retractprobe.g

    M280 P7 S90 I1

    homez.g

    ; homez.g
    ; called to home the Z axis
    ;
    ; generated by RepRapFirmware Configuration Tool v2 on Wed Apr 03 2019 15:50:05 GMT-0500 (Central Daylight Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 X190 Y150 F4000 ; Move probe to middle of bed
    G30
    G92 Z13 ; set Z to axis minimum (you may want to adjust this)

    ; Uncomment the following lines to lift Z after probing
    ;G91 ; relative positioning
    ;G1 S2 Z5 F100 ; lift Z relative to current position
    ;G90 ; absolute positioning

    homeall.g

    ; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool v2 on Wed Apr 03 2019 15:50:05 GMT-0500 (Central Daylight Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-305 Y-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 X5 Y5 F6000 ; go back a few mm
    G1 S1 X-305 Y-305 F360 ; move slowly to X and Y axis endstops once more (second pass)
    G90
    G1 X190 Y150 F4000 ; Move probe to middle of bed
    G30
    ;G90 ; absolute positioning
    G92 Z11 ; set Z to axis minimum (you may want to adjust this)

    ; Uncomment the following lines to lift Z after probing
    ;G91 ; relative positioning
    ;G1 S2 Z5 F100 ; lift Z relative to current position
    ;G90 ; ; absolute positioning



  • does the self test work?

    M280 P7 S120 I1



  • @veti said in Bltouch Error: Z probe was not triggered during probing move:

    M280 P7 S120 I1

    yes it does
    <click, click, click.....>



  • @doerofthings said in Bltouch Error: Z probe was not triggered during probing move:

    G31 X-45 Y-5 Z-5.25

    How did you get a trigger height of -5.25?



  • @phaedrux
    honestly, i'm not sure how i arrived at that.

    i think i was trying to set the Z offset, but yeah, it doesn't make sense.

    so i went back and set it based on the procedure here http://www.sublimelayers.com/2017/05/fdffsd.html
    and arrived at G31 X-45 Y-5 Z3.7 P25

    it seems to like that, but it thinks zero is 2.2mm above the bed. how do i fix that? i tried setting the G31 Z to 1.5 and also 5.9 (assuming i didnt know how it was counting...) but it made no change.

    how do i set the z offset on this?



  • @doerofthings said in Bltouch Error: Z probe was not triggered during probing move:

    G92 Z11 ; set Z to axis minimum (you may want to adjust this)

    Remove this from your homeall.g and homez.g. You definitely don't want to force the z height after you've used the probe to find the real height with G30. This explains why changing the offset had no effect, because you are overriding it.

    I have a feeling that your bltouch may be mounted a bit too high as well. It should be mounted so that the base of the probe body is 8mm above the nozzle tip. When installed correctly, the trigger height will be around 2mm.

    Once you've done that, recheck your trigger height with this procedure: https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

    Then you can rerun your G29 if you want to use it.


 

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