BLT Touch - duet Wifi



  • Hello,
    I cant to get it work 😕
    so i add in config.g
    Z-Probe
    M307 H7 A-1 C-1 D-1
    M558 P5 X0 Y0 Z1 H5 F100 T2000
    G31 X-22.00 Y7.0 Z1.5 P5
    M557 X15:215 Y15:195 S20

    I plug black with white with 240 ohm resistor to Z probe on duet wifi and red bown nad orange to +5 ground nad heater 7
    so i can send m401 and m402 and probe react but in consol in Z-probe i have 0 reading on scale all time 😕

    When i try g30 bed go up (coreXY) but i have error no signal from sensor 😕

    is my blt not working correct or i have someting mess up in settings ?

    p.s. i upgrade firemware to 1.21 and change m558 to p9 and nothing change 😕 m401 nad m402 work but duet not see signal z-probe is still 0 in .
    When probe is up with red light i mesure voltage on black/white na i have about 3.6mV its that ok ??


  • administrators

    @kivlow said in BLT Touch - duet Wifi:

    Hello,
    I cant to get it work 😕
    so i add in config.g
    Z-Probe
    M307 H7 A-1 C-1 D-1
    M558 P5 X0 Y0 Z1 H5 F100 T2000
    G31 X-22.00 Y7.0 Z1.5 P5
    M557 X15:215 Y15:195 S20

    I plug black with white with 240 ohm resistor to Z probe on duet wifi and red bown nad orange to +5 ground nad heater 7
    so i can send m401 and m402 and probe react but in consol in Z-probe i have 0 reading on scale all time 😕

    When i try g30 bed go up (coreXY) but i have error no signal from sensor 😕

    is my blt not working correct or i have someting mess up in settings ?

    p.s. i upgrade firemware to 1.21 and change m558 to p9 and nothing change 😕 m401 nad m402 work but duet not see signal z-probe is still 0 in .
    When probe is up with red light i mesure voltage on black/white na i have about 3.6mV its that ok ??

    It should be about 3V, not 3.6mV. Are you sure your resistor is 240 ohms? Later versions of bltouch don't need the resistor, instead you cut a trace for 3.3V operation.



  • something wired is happend - when i send m401 and push the probe up till gets error and blinks then i have 1000 on web interface.
    after that when i send m280 p7 s160 i1 its go off
    (error mode) and 0 on interface go on.
    when i send 401 or 402 still 0 on interface.
    p.s. its old one blt touch - when i force to error then i have on black/white about 3.8V without resistor



  • I order new bl touch so if new will works everything will be clear (if not i mess setting or my duet is broken )



  • New probe work fine but i have old one type so in manual is writen to add 240ohm resistor for 3.3 logic but in my setup work fine without it :]
    Maybe it is connected with that i use 24V supply ?!


  • administrators

    @kivlow said in BLT Touch - duet Wifi:

    New probe work fine but i have old one type so in manual is writen to add 240ohm resistor for 3.3 logic but in my setup work fine without it :]
    Maybe it is connected with that i use 24V supply ?!

    Unlikely. Although we say that you shouldn't feed more than 3.3V into the Z probe input, in practice it will tolerate much more although we can't guarantee that.


 

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