Bl touch problems



  • Good evening,

    I recently found a permanent solution on mounting my maestro board got it printed out and installed. In the process I had to re run the wiring. I have triple checked the wiring re did my conf.g with the configuration fallowing the Ender 3 pro and duet maestro set up guide. however i keep getting "Z probe already triggered at start of probing move". also i noticed that my z-probe read out is 1000. not sure why.

    thank you
    Ky



  • Re check the wiring.

    Does the probe respond to deploy and retract commands?



  • @phaedrux yes it responds to both



  • here is my config.g

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

    ; Network
    M550 P"Ender3ProMaestro" ; Set machine name
    M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
    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 S1 ; Physical drive 2 goes forwards
    M569 P3 S0 ; Physical drive 3 goes backwards
    M350 X16 Y16 Z16 E128 I1 ; Configure microstepping with interpolation
    M92 X80.00 Y80.00 Z4000.00 E741.00 ; Set steps per mm
    M566 X600.00 Y600.00 Z60.00 E300.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X9000.00 Y9000.00 Z600.00 E6000.00 ; Set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z120.00 E5000.00 ; Set accelerations (mm/s^2)
    M906 X800.00 Y800.00 Z800.00 E900.00 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 X230 Y230 Z260 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S1 ; Set active high endstops

    ; Z-Probe
    M574 Z1 S2 ; Set endstops controlled by probe
    M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds
    G31 P500 X0 Y0 Z2.5 ; Set Z probe trigger value, offset and trigger height
    M557 X10:220 Y10:220 S20 ; Define mesh grid

    ; Heaters
    M307 H0 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
    M305 P0 T98801 B4185 R2200 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T98801 B4185 R2200 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C

    ; Fans
    M106 P0 S0 I0 F20 H1 T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P1 S0 I0 F20 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P2 S0 I0 F20 H1:0 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; Tools
    M563 P0 S"Hotend" 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 S21 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

    ; Custom settings
    M918 P1 E4 ; Enable 12864 LCD with 1 menu item per encoder click

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



  • i think i got it working but im not sure how good of a fix it is.
    sense the proble is ready 1000 i set the trigger vallue to 1001 at the moment. this allows me to get some movement.



  • How exactly do you have it wired? It sounds like the signal is being inverted or that it needs to be inverted.



  • 0_1560390698810_c7f6eb0d-9074-4381-bc0a-842d3b8deb69-image.png



  • I used the connectors that came with the board. unfortunate I could not find a 5 pin connector so i used a 2 pin and a 3 pin and cut the plastic guides that interfered off.



  • 0_1560391262726_unnamed.jpg
    here is the actual wiring



  • That looks right.

    What version of BLTouch is it?

    I'd still double check the wires and crimps themselves to make sure they aren't damaged and that all electrical connections are actually being made.



  • the bl touch is v3



  • I have a V3 BlTouch that I hope to be connecting to a Duet Maestro in the next couple days once I have some parts printed. Though I don't think there is anything compatibility wise that should be stopping it from working.

    Most likely it's a wiring issue of some kind, or a small configuration oversight.

    Maybe take a break from it and come back at it with fresh eyes. Start from the top.



  • thank you for the help. I am going to re do the crimp connections and see where that gets me.



  • 0_1560394654839_bc85cb07-df98-4a9d-8944-7a8ff5dd36a0-image.png
    i figured out part of the issue. the white and black connectors near the bltouch came untouched. now my z-probe is ready. im not sure if anything on this could be usefull but now i can actually run the home however when i trigger the bltouch it the z axis does not stop.



  • If it's not stopping, that would indicate there's still an issue with the wiring, probably the white wire.



  • Is that a direct run from the BL to the Maestro in regards to the wiring?
    Do you have any joins in the wires? If you do make sure they are solid and if you have changed colours make sure they correspond correctly at the Maestro end.

    Also unplug the tiny connector on the back of the BL Touch carefully and plug back in again, it might not be seated correctly, its fiddly!

    Your code for the Z-Probe is the same as mine.

    Also as Phaedrux has guided me before the height of the BL Touch needs to be correct.
    Turn power off, wind down the Z axis slowly so the nozzle touches the bed.
    Measure from bed to bottom of the CASE of the BL touch, it should be about 8mm. Not the probe tip.
    I printed a tool from thingiverse to help me as using a mirror as a bed makes seeing things harder!



  • Your G31 in your config says " G31 P500 X0 Y0 " . Your need measure your off sets ,

    Just thinking is the BL TOUCH flashing red. mine does it now and then and i have to power up and down the printer... when she is flashing it shows triggered .



  • @lodger He does have an offset
    G31 P500 X0 Y0 Z2.5
    I had a double take also.



  • @paulhew said in Bl touch problems:

    X0 Y0

    He'll also need the X and Y offset.



  • @phaedrux If your unsure of this point us to how you have mounted it .IE what mount you printed out so we can help...



  • so i figured out the issue my connectors near the bl touch came undone i need to heat shrink the connectors so that this does not happen before. at the moment it is running. as fare as actual offsets I have a general idea of what they or for this particular mount but i plan on printing a diffrent one out as well as design a blower attachment for the nactua quite fans i am using to replace the stock fans.
    if anyone has any suggestions an a good mounting system i would take suggestions. I am currently looking at the hero me mounts but not set on them.
    thank you for all the help.


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