Z probe



  • Hi can anyone have a look at my config file for my Tronxy X5sa and duet2 WiFi please, I have most things working and homing except the Z probe isn’t stopping the z axis, it has been wired into permanently on fan connectors and the the signal to the first pin on the z probe connector and the signal wire has a bat 85 soldered into it as described on another post, the sensor lights up if I put something metal under it, also I need it to move over the bed from xy position to detect the bed.
    Thanks

    Configuration file for Duet WiFi (firmware version 2.03)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Tue May 05 2020 16:01:20 GMT+0100 (British Summer Time)

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

    M667 S1 ; select CoreXY mode

    ; 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 backwards
    M569 P1 S0 ; physical drive 1 goes backwards
    M569 P2 S0 ; physical drive 2 goes backwards
    M569 P3 S1 ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3 ; set drive mapping
    M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E93.00 ; set steps per mm
    M566 X600.00 Y600.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X18000.00 Y18000.00 Z180.00 E1500.00 ; set maximum speeds (mm/min)
    M201 X3000.00 Y3000.00 Z100.00 E10000.00 ; set accelerations (mm/s^2)
    M906 X950 Y950 Z950 E950 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 Z0 S1 ; set axis minima
    M208 X330 Y330 Z375 S0 ; set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; set active low and disabled endstops
    M574 Z1 S2 ; set endstops controlled by probe

    ; Z-Probe
    M558 P2 H5 F120 T6000 ; set Z probe type to modulated and the dive height + speeds
    M558 H30 ;*** Remove this line after delta calibration has been done and new delta parameters have been saved
    G31 P500 X100 Y100 Z4 ; set Z probe trigger value, offset and trigger height
    M557 X15:305 Y15:305 S20 ; define mesh grid

    ; Heaters
    M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
    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 S280 ; set temperature limit for heater 1 to 280C

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; 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

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

    ; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Tue May 05 2020 16:01:20 GMT+0100 (British Summer Time)
    G91 ; relative positioning
    G1 H2 Z5 F6000 ; lift Z relative to current position
    G1 H1 X-335 Y-335 F1800 ; move quickly to X or Y endstop and stop there (first pass)
    G1 H1 X-335 ; home X axis
    G1 H1 Y-335 ; home Y axis
    G1 X5 Y5 F6000 ; go back a few mm
    G1 H1 X-335 F360 ; move slowly to X axis endstop once more (second pass)
    G1 H1 Y-335 ; then move slowly to Y axis endstop
    G90 ; absolute positioning
    G1 X-85 Y-85 F6000 ; go to first bed probe point and home Z
    G30 ; home Z by probing the bed

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

    ; homex.g
    ; called to home the X axis
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Tue May 05 2020 16:01:20 GMT+0100 (British Summer Time)
    G91 ; relative positioning
    G1 H2 Z5 F6000 ; lift Z relative to current position
    G1 H1 X-335 F1800 ; move quickly to X axis endstop and stop there (first pass)
    G1 X5 F6000 ; go back a few mm
    G1 H1 X-335 F360 ; move slowly to X axis endstop once more (second pass)
    G1 H2 Z-5 F6000 ; lower Z again
    G90 ; absolute positioning

    ; homey.g
    ; called to home the Y axis
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Tue May 05 2020 16:01:20 GMT+0100 (British Summer Time)
    G91 ; relative positioning
    G1 H2 Z5 F6000 ; lift Z relative to current position
    G1 H1 Y-335 F1800 ; move quickly to Y axis endstop and stop there (first pass)
    G1 Y5 F6000 ; go back a few mm
    G1 H1 Y-335 F360 ; move slowly to Y axis endstop once more (second pass)
    G1 H2 Z-5 F6000 ; lower Z again
    G90 ; absolute positioning

    ; homez.g
    ; called to home the Z axis
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Tue May 05 2020 16:01:20 GMT+0100 (British Summer Time)
    G91 ; relative positioning
    G1 H2 Z5 F6000 ; lift Z relative to current position
    G90 ; absolute positioning
    G1 X-85 Y-85 F6000 ; go to first probe point
    G30 ; home Z by probing the bed

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


  • Moderator

    @Saroleve Are you using the stock TronXY NPN sensor? If so, take a look at the config in this thread: https://forum.duet3d.com/topic/8514/auto-bed-leveling-map-on-tronxy-x5sa

    I'm assuming you have a Duet WiFi, hardware version 1.03 or older, which is why you have added the Bat 85, and then connected to Z-PROBE in, as per https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_NPN_output_normally_open_inductive_or_capacitive_sensor

    From your config.g:
    M558 P2 H5 F120 T6000 ; set Z probe type to modulated and the dive height + speeds
    From the other thread: M558 P5 I1 H5 F120 T6000
    You should set your probe to type P5, which is for switch-type sensors. P2 is expecting to modulate the signal, which an NPN sensor doesn't.
    I1 will invert the probe, which you need to do with NPN sensors.
    The rest is fine. Once the probe is working, you could add A10 R0.5 S0.003 B0 on the end of the M558 command, where A10 sets the number of times to probe a point until it consistently hits the S0.003 tolerance value, R0.5 is a half-second rest between probes (to let it settle) and B0 turns the heaters off during probing (less interference).

    G31 P500 X100 Y100 Z4 ; set Z probe trigger value, offset and trigger height
    You've set X and Y offsets very high, so the firmware thinks the probe is 100mm away from the hot end in X and Y. This is probably not correct! The other thread has X-30 Y0. For setting Z (once the probe is working) see https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

    Ian



  • @droftarts thanks Ian for your explanation, I’m completely new to the duet so your help is much appreciated I’ll get on to it and report back👍🏻


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