z probe stopped working after update



  • After board change and firmware update, the Z probe stopped working, using inductive sensor
    1.Sensor's LED comes up once expose to metal
    2. changed the probe, even then no luck

    what could be the issue, sharing the config.g and file below
    My config.g
    ; Configuration file for Duet WiFi (firmware version 2.03)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.0.3 on Tue Sep 10 2019 18:28:37 GMT+0530 (IST)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"BIG FACTORY" ; set printer name

    ; Network
    M551 P"3m3d" ; set password
    M552 S1 ; enable network
    M587 S"MMM" P"KINGS1234" " ; Configure access point. You can delete this line once connected
    M587 S"ESYA" P"ESYA@700"
    M586 P0 S1 ; enable HTTP
    M586 P1 S1 ; enable FTP
    M586 P2 S1 ; enable Telnet
    M584 X5 Y6 Z7 U11 E3:4 ; create the U axis and assign stepper driver 11 to it
    ; Drives
    M569 P5 S1 ; physical drive 5 goes forwards
    M569 P6 S1
    M569 P5 R1 T10:10:20:100 ; physical drive 5 goes forwards
    M569 P6 R1 T10:10:20:100 ; Physical drive 6 goes forwards
    M569 P7 S1 ; physical drive 7 goes forwards
    M569 P7 R1 T2.2:2.2:4:20 ; Physical drive 7 goes forwards
    M569 P3 S0 ; physical drive 3 goes forwards
    M569 P4 S0 ; physical drive 4 goes forwards
    M569 P10 S1
    M569 P10 R1 T10:10:20:100 ; Physical drive 11 goes forwards
    M584 X5 Y6 Z7 U10 E3:4 ; Apply custom drive mapping
    M350 X32 Y32 Z32 U32 E32:32 I0 ; Configure microstepping without interpolation
    M92 X25 Y16.00 Z10000.00 U25.00 E820.00:820.00 ; Set steps per mm
    M566 X1000.00 Y100.00 Z100.00 U1000.00 E120.00:120.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X7000.00 Y7000.00 Z100.00 U7000.00 E1200.00:1200.00 ; Set maximum speeds (mm/min)
    M201 X700.00 Y700.00 Z100.00 U700.00 E250.00:250.00 ; Set accelerations (mm/s^2)
    M906 X800.00 Y800.00 Z800.00 U800.00 E900.00:800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout
    ;Filament size
    M200 D1.75
    ; Axis Limits
    M208 X1600 Y1100 U1600 Z1700 ; Set axis maxima
    M208 X-50 Y0 U0 Z-0.2 S1 ; Set axis minimum (adjust to make X=0 and Y=0 the edge of the bed)

    ; Endstops
    M574 X1 Y1 Z0 U2 S1 ; Set endstop configuration (X and Y endstops at low end, U endstop at high end, active high, no Z endstop)
    ; Z-Probe
    M574 Z1 S2 ; set endstops controlled by probe
    M307 H7 A-1 C-1 D-1 ; disable heater on PWM channel for BLTouch
    M558 P5 H5 F130 T6000 I1 ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X0 Y0 Z1.55 ; set Z probe trigger value, offset and trigger height
    M557 X20:1500 Y20:1000 S300 ; define mesh grid

    ; Heaters
    ;M141 H4 ; assign chamber heater to heater 0
    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 B4725 R4700 ; configure PT100 for heater 1
    M143 H1 S280 ; set temperature limit for heater 1 to 500C
    M305 P2 X201 ; configure PT100 for heater 2
    M143 H2 S500 ; set temperature limit for heater 2 to 500C
    M305 P4 X202 ; configure PT100 for heater 4
    ;M143 H4 S120 ; set temperature limit for heater 4 to 120C

    ; Fans

    M106 P0 S0 I0 F500 H T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
    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 H2 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on
    ; Tools
    M563 P0 S"FIRST" 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"SECOND" D1 H2 X3 F2 ; Define tool 1
    G10 P1 Y0 U0 Z0 S0 R0 ; set tool 1 offsets and temperatures
    M563 P2 S"MIXED" D0:1 H1:2 X0:3 F0:2 ; tool 2 uses both extruders, hot end heaters and fans, and maps X to both X and U

    G10 P2 X0 Y0 Z0 ; Set tool 2 axis offsets
    G10 P2 X500 Y0 U-500 S0 R0 ; set tool offsets and temperatures
    M567 P2 E1:1 ; set mix ratio 100% on both extruders

    ; Automatic power saving
    M911 S19.8 R22 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

    ; config-override.g file generated in response to M500 at 2019-06-18 12:38
    ; This is a system-generated file - do not edit
    ; Heater model parameters
    M307 H0 A90.0 C700.0 D10.0 S1.00 V0.0 B1
    M307 H1 A340.0 C140.0 D5.5 S1.00 V0.0 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

    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



  • Some things wrong with your config.g:

    Remove or comment out M587 commands (in 'Network') from your config.g. These are already stored in the WiFi module's flash memory. Note from gcode dictionary:

    Important! Do not use M587 within config.g. As well as being a security hazard, writing the access point parameters to WiFi chip every time you start the Duet may eventually wear out the flash memory.

    Two M584 commands (you don't define stepper driver 11 anywhere, so I guess the first can be deleted):

    M584 X5 Y6 Z7 U11 E3:4 ; create the U axis and assign stepper driver 11 to it
    ; Drives
    ...
    M584 X5 Y6 Z7 U10 E3:4 ; Apply custom drive mapping

    You seem to be using external stepper drivers (not Duex) on drives 5, 6, 7, and 10, mapped to X, Y Z and U. The firmware can't set the microstepping M350 or motor currents M906 for these motors, it's done by the external stepper driver.

    For you Z probe, it's currently defined as:

    M307 H7 A-1 C-1 D-1 ; disable heater on PWM channel for BLTouch
    M558 P5 H5 F130 T6000 I1 ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X0 Y0 Z1.55 ; set Z probe trigger value, offset and trigger height

    Z Probe type is set to P5 with M558 (which I think is correct). Why do you disable the heater on H7 (M307)? How is the probe connected?
    Check connections, see here for details, assuming sensor is NPN normally open inductive sensor: https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_NPN_output_normally_open_inductive_or_capacitive_sensor
    I think the output of the sensor should be connected directly to the Z-probe IN. Possibly it is not connected correctly, or polarity of power wires to probe is incorrect.

    Ian



  • Thanks droftarts,
    I'll correct as suggested,
    Heater pin, I was using Bltouch earlier, it was connected to the heater Pin,later changed to proximity sensor (P5)
    It was working fine till the time the board change took place, once updated to the latest firmware, had lot disconnection issue then switch over to the previous version, then the z Probe stopped working
    Z probe reading on DWC o constant, the sensor led comes up once expose to metal which means the sensor working fine but duet not reading the signal (Signal wire connected to Duet probe IN)
    Is there any glare of error in config.g
    I've changed the probe twice thought that the sensor could be the issue, but that might not be the problem



  • Is there any alternative, if the z probe (Proximity sensor) not working then I can use microswitch as Endstop and run the printer now and later I can change to Bltouch
    what need to be changed in the config and wiring for microswitch



  • @Milan said in z probe stopped working after update:

    Z probe reading on DWC o constant, the sensor led comes up once expose to metal which means the sensor working fine but duet not reading the signal (Signal wire connected to Duet probe IN)

    M558 P5 defines a switch, with G31 P500 defining the trigger value. Could be the trigger value is too high; try changing it to a lower value (try 10, 100, 250) and see if the endstop triggers. Have you changed from 24V to 12V, or wired the sensor differently? A picture might help.

    Yes, you can change it for a microswitch. Or you can manually jog the Z until the nozzle touches the bed, and send G92 Z0 to set the position.

    Ian



  • @Milan said in z probe stopped working after update:

    and later I can change to Bltouch

    Just to reiterate what @Veti doesn’t get tired of to propagate: you could also have a look at this here - IMHO, that is less troublesome than a BLtouch.


  • administrators

    What type of Z probe do you have, and how have you connected it to the Duet?


Log in to reply