Bl-Touch self extended

  • I think I have a problem with my Bl-Touch. It just extended while printing. Result pin skew. But could save him. 10 minutes after the end of printing, the pin is simply extended again without being requested.

    What could that be?
    How can you prevent that?

    How can i write my config in a Box here?

  • there is a grub screw at the top. you can adjust it. try it a bit higher

  • Ok ill test it. But he run 12 month in a another Printer without any problems.

    I hope is not a Firmware issue ore my board has an issue

  • Moderator

    Unless you have a rogue command to extend the pin in your gcode it's probably a problem with the probe. As Veti says it could be the grub screw that adjusts the position of the magnet isn't in the right place.

    You can copy and paste the text of your config.g into a post window if you want to share it, but I don't think there could be anything in it to cause the pin to fall during a print.

  • This screw is on max high. The pin is not fall from alone. I stand by the printer and the bl touch make "klick"

    This make the pl touch to when i heat the hotend and bed at same time.

  • does your voltage drop when your heat both?

  • No, 24.3v and 12.1v constant. But when I heat the hotend and bed together, it says Toolchange for a long time at the top of DCW. DCW then takes a very long time to react to a setting, such as changing the temperature.

  • post your M122 of both the duet and the toolchanger when that happens

  • M122
    === Diagnostics ===
    RepRapFirmware for Duet 3 MB6HC version 3.1.1 running on Duet 3 MB6HC v1.01 or later (SBC mode)
    Board ID: 08DJM-956L2-G43S8-6JTDG-3SJ6P-KB0UG
    Used output buffers: 1 of 40 (10 max)
    === RTOS ===
    Static ram: 154604
    Dynamic ram: 163292 of which 136 recycled
    Exception stack ram used: 224
    Never used ram: 74960
    Tasks: NETWORK(ready,1972) HEAT(blocked,1188) CanReceiv(suspended,3820) CanSender(suspended,1488) CanClock(blocked,1436) TMC(blocked,204) MAIN(running,4944) IDLE(ready,76)
    Owned mutexes:
    === Platform ===
    Last reset 00:50:37 ago, cause: software
    Last software reset at 2020-12-20 06:24, reason: User, spinning module LinuxInterface, available RAM 75036 bytes (slot 2)
    Software reset code 0x0010 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0444a000 BFAR 0x00000000 SP 0xffffffff Task MAIN
    Error status: 0
    MCU temperature: min 28.9, current 29.5, max 29.8
    Supply voltage: min 24.7, current 24.7, max 24.8, under voltage events: 0, over voltage events: 0, power good: yes
    12V rail voltage: min 12.1, current 12.1, max 12.2, under voltage events: 0
    Driver 0: standstill, reads 24546, writes 21 timeouts 0, SG min/max 0/0
    Driver 1: standstill, reads 24546, writes 21 timeouts 0, SG min/max 0/0
    Driver 2: standstill, reads 24547, writes 21 timeouts 0, SG min/max 0/0
    Driver 3: standstill, reads 24547, writes 21 timeouts 0, SG min/max 0/0
    Driver 4: standstill, reads 24547, writes 21 timeouts 0, SG min/max 0/0
    Driver 5: standstill, reads 24548, writes 21 timeouts 0, SG min/max 0/0
    Date/time: 2020-12-20 07:15:34
    Slowest loop: 3.99ms; fastest: 0.14ms
    === Storage ===
    Free file entries: 10
    SD card 0 not detected, interface speed: 37.5MBytes/sec
    SD card longest read time 0.0ms, write time 0.0ms, max retries 0
    === Move ===
    Hiccups: 0(0), FreeDm: 375, MinFreeDm: 375, MaxWait: 0ms
    Bed compensation in use: none, comp offset 0.000
    === MainDDARing ===
    Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0  CDDA state: -1
    === AuxDDARing ===
    Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0  CDDA state: -1
    === Heat ===
    Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = 2 -1 -1 -1
    Heater 1 is on, I-accum = 0.0
    === GCodes ===
    Segments left: 0
    Movement lock held by null
    HTTP* is ready with "M122" in state(s) 0
    Telnet is idle in state(s) 0
    File is idle in state(s) 0
    USB is idle in state(s) 0
    Aux is idle in state(s) 0
    Trigger* is idle in state(s) 0
    Queue is idle in state(s) 0
    LCD is idle in state(s) 0
    SBC is idle in state(s) 0
    Daemon* is idle in state(s) 0
    Aux2 is idle in state(s) 0
    Autopause is idle in state(s) 0
    Code queue is empty.
    === Network ===
    Slowest loop: 0.88ms; fastest: 0.01ms
    Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions Telnet(0), 0 sessions
    HTTP sessions: 0 of 8
    - Ethernet -
    State: disabled
    Error counts: 0 0 0 0 0
    Socket states: 0 0 0 0 0 0 0 0
    === CAN ===
    Messages sent 12121, longest wait 0ms for type 0
    === Linux interface ===
    State: 0, failed transfers: 0
    Last transfer: 16ms ago
    RX/TX seq numbers: 31465/31467
    SPI underruns 0, overruns 0
    Number of disconnects: 0
    Buffer RX/TX: 0/0-0
    === Duet Control Server ===
    Duet Control Server v3.1.1
    Code buffer space: 4096
    Configured SPI speed: 8000000 Hz
    Full transfers per second: 32.00

  • @Heartleander81

    are you using usb to connect to your duet?

  • Only raspberry with spi. I doun't use Usb

  • 20201216_091452.jpg

    This is my wiring

  • normally when someone post the diagnostics without newlines, its because it was not copied from the web console and they used usb.

  • I have copy with my smartphone. šŸ˜…

    But I think now my bl-touch is damaged. I have make a g32 and the bed drive in the nozzel. Bl-touch was red but nothing stop

  • check the extension wire, that is know to make bad contact and cause issues.

  • Have make new connections last week bevor i have it install in the HevORT


  • @Veti

    Found the bug. It was due to the contact resistance at the on-board connection. I thank you for the help and patience

  • ok now i'm confused. Since I no longer trusted the old Bl-touch, I installed a new one. It's the same problem that it just goes in and out without me triggering it. The connection on the board is new. That happens when you print or afterwards. If I had the printer off, that didn't happen for days.

  • The Bl-Touch doesn't seem to be the problem, nor does the wiring. If the pin is inside or outside, DCW says "not stopped" When I have the BL-Touch off, the board tells me "at min stop" I measure 4-10mV at pin outside with pin inside 3.3V on the white cable to ground

  • Moderator

    Please post your full config.g and homeall.g as well as the results of M98 P"config.g"

  • ; Configuration file for Duet 3 (firmware version 3)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Wed Aug 26 2020 16:14:58 GMT+0200 (MitteleuropƤische Sommerzeit)
    ; General preferences
    G90                                                ; send absolute coordinates...
    M83                                                ; ...but relative extruder moves
    M550 P"Duet3"                                      ; set printer name
    M912 P0 S-5                                        ; sstzt CPU Temp korrektur
    M669 K1                                            ;switch to core X/Y mode
    ; Drives
    M569 P0.0 S0 V30 D3                                ; X physical drive 0.0 goes forwards
    M569 P0.1 S0 V30 D3                                ; Y physical drive 0.1 goes forwards
    M569 P0.2 S1 V30 D3                                ; Z1 physical drive 0.2 goes forwards
    M569 P0.3 S1 V30 D3                                ; Z2 physical drive 0.3 goes forwards
    M569 P0.4 S1 V30 D3                                ; Z3 physical drive 0.4 goes forwards
    M569 P0.5 S0 V30 D3                                ; E physical drive 0.5 goes backwards
    M584 X0.0 Y0.1 Z0.2:0.3:0.4 E0.5                   ; set drive mapping
    M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z800.00 E419.00                  ; set steps per mm
    M566 X1000.00 Y1000.00 Z300.00 E120.00             ; set maximum instantaneous speed changes (mm/min)
    M203 X18000.00 Y18000.00 Z600.00 E3000.00          ; set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z200.00 E450.00               ; set accelerations (mm/s^2)
    M906 X800 Y800 Z900 E800 I30                       ; set motor currents (mA) and motor idle factor in per cent
    M84 S120                                           ; Set idle timeout
    ; Axis Limits
    M208 X0 Y0 Z0 S1                                   ; set axis minima
    M208 X300 Y300 Z295 S0                             ; set axis maxima
    ; Endstops
    M574 X1 S1 P""                               ; configure active-high endstop for low end on X via pin
    M574 Y1 S1 P""                               ; configure active-high endstop for low end on Y via pin
    M574 Z1 S2
    ; Z-Probe
    M950 S0 C"io7.out"                                          ; create servo pin 0 for BLTouch
    M558 P9 C"^" H5 F400 T5000                            ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X38.884 Y-6.578 Z2.21                              ; set Z probe trigger value, offset and trigger height
    M557 X40:260 Y40:260 S40                                    ; define mesh grid
    M671 X-33.985:142.224:318.433 Y-16.206:312.004:-16.206 S50  ;Z lift Point Position
    ; Heaters
    M308 S0 A"Bett" P"temp0" Y"thermistor" T100000 B4100       ; configure sensor 0 as thermistor on pin temp0
    M950 H0 C"out0" T0                                         ; create bed heater output on out0 and map it to sensor 0
    M307 H0 A176.1 C1192.2 D31.2 S1.0 V24.3 B0                 ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0                                                    ; qmap heated bed to heater 0
    M143 H0 S120                                               ; set temperature limit for heater 0 to 120C
    M308 S1 A"Hotend" P"temp1" Y"thermistor" T100000 B4395     ; configure sensor 1 as thermistor on pin temp1
    M950 H1 C"out1" T1                                         ; create nozzle heater output on out1 and map it to sensor 1
    M307 H1 B0 S0.80                                           ; disable bang-bang mode for heater  and set PWM limit
    M308 S2 A"Elektro" P"temp3" Y"thermistor" T100000 B4100    ; configure sensor 1 as thermistor on pin temp1
    M141 H2
    M308 S3 Y"drivers" A"Stepper"  ; configure sensor 3 as temperature warning and overheat flags on the TMC2660 on Duet
    M308 S4 Y"mcu-temp" A"MCU" ; configure sensor 4 as thermistor on pin e1temp
    ; Fans
    M950 F1 C"out7" Q500                               ; create fan 1 on pin out7 and set its frequency
    M106 P1 C"Hotend" S1 H1 T50                        ; set fan 1 name and value. Thermostatic control is turned on
    M950 F0 C"out4" Q1000                              ; create fan 0 on pin out4 and set its frequency
    M106 P0 C"Bauteil1" S0 H-1                         ; set fan 0 name and value. Thermostatic control is turned off
    M950 F2 C"out9" Q500                               ; create Light on pin out9 and set its frequency
    M106 P2 C"Licht" S0 H-1
    M950 F3 C"out8" Q500                               ; create fan 3 on pin out8 and set its frequency                        
    M106 P3 H3:4 T33                                   ; set fan 3 value
    ; Tools
    M563 P0 S"Hotend" 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
    M564 S1 H0
    ; Miscellaneous
    ;M575 P1 S1 B57600                                  ; enable support for PanelDue
    M501                                               ; load saved parameters from non-volatile memory
    M911 S21 R22 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
    ; homeall file for use with dc42 Duet firmware on CoreXY printers
    ; This file assumes the endstop switches are at the low end of each axis.
    ; Reverse the X and Y movement for high-end switches.
    ; Adjust the bed upper and lower limits in config.g (M208 commands) to get the correct homing positions
    G91                       ; relative mode
    G1 Z5 F400
    G1 H1 X-240 Y-240 F6000   ; course home X or Y
    G1 H1 X-240               ; course home X
    G1 H1 Y-240               ; course home Y
    G1 X4 Y4 F6000             ; move away from the endstops
    G1 H1 X-10                ; fine home X
    G1 H1 Y-10                ; fine home Y
    G90                       ; back to absolute mode
    ; The following code assumes you are using a Z probe to do Z homing.
    ; Adjust the XY coordinates in the following to place the Z probe over a suitable spot,
    ; preferably near the centre of the bed if your Z probe supports that
    G1 X112 Y156.8 F6000
    ; This file leaves the head at the zprobe trigger height so that you can slip a piece of paper under it and then do G0 Z0 to check the height.
    ; If you prefer to send the printer to X0Y0Z0, un-comment the following lines
    ;G1 X0 Y0 F6000
    ;G1 Z5 F400
    M98 P"config.g"
    Warning: M307: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 201C
    Warning: M307: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 201C

  • @Phaedrux ok I hope that help.

    When I measure from ground to white I have 3.3V when retracted, <20mV when extended. DWC always says "not stopped"
    If I measure 5V pin to ground I have 4.94V.

  • Startcode

    G32 		                   ; True Bed Leveling und Meshbedleveling
    G29 S1 P"heightmap.csv"         ; Load Mesh
    G1 X5 Y5 Z15 F6000 	           ; Move the platform down 15mm 
    ;M117 Prime the extruder 
    G92 E0                         ; reset extruder
    G1 E3 F200                     ; Extrude 3mm
    ;M117 Purge Extruder 
    G92 E0                         ; reset extruder 
    G1 Z1 F1000 	               ; move z up to prevent scratching of surface 
    G1 X10 Y10 Z0.3 F5000          ; move to start-line position 
    G1 X10 Y200 E15 F1500          ; draw 1st line 
    G1 X10.8 Y200 F5000            ; move to side a little 
    G1 X11.6 Y2 E30 F1500          ; draw 2nd line 
    G1 Z17 F3000                   ; Move Bed 17mm down
    G1 E15 F300                    ; Extrude 15mm
    G92 E0                         ; reset extruder
    G4 S5                          ; Wait 5 second


    M104 S0
    M140 S0
    G92 E1
    G1 E-1 F300						;Retract the filament
    G1 X5 Y300 Z290 F6000

  • @Heartleander81 I was just reading the BLT documentation the other day and it mentioned it being susceptible to noise from the hotbend heater wires (guessing 12/24v pwm stepping on the BLT 3.3/5v signal) Wondering if this is your issue...

    Of course I can't find it now to link...

  • @BDubs That would be an explanation. Was the fault on the board or was it from the cables? is the best way to shield the Bl-Touch?

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