[Help] BLtouch not working with Duet Wifi; "Invalid Servo Index"



  • A couple of weeks ago, I got a Duet Wifi and so far, so good! It hasn't been as easy to set up as the original RAMBo for my Rostock Max V2, but I've got it working, well enough so that I could print a new effector plate that'll let me use a BLtouch.
    I've followed a few guides to install my BLtouch, and it seems to function, but not "work" as intended. When I turn the printer on, the BLtouch glows red, the probe deploys and retracts. I figure this is a power-on self-test of the BLtouch itself.
    I've done the wiring and added the snippets of code to my config.g and made the macros according to a couple of different walkthroughs, and combinations thereof:

    However, when I start the "Deploy Probe" or "Retract Probe" macros, I get the following message:

    [c]M98 P0:/macros/Deploy Probe
    Error: Invalid servo index 3 in M280 command[/c]

    I've tried using the PWM for Heater 3 and Heater 8, and checked my wiring a few times. My config.g is here: https://pastebin.com/nGkVPpnJ
    I feel like I must be missing something very simple. Wiring Pics: https://imgur.com/gallery/eaal6
    Once I'm past this hiccup, I think I can get the autoleveling and probe height stuff figured out.

    Any help would be appreciated!

    My macros are as follow for deploy and retract, respectively:
    [c]M280 P3 S10 I1[/c]
    [c]M280 P3 S90 I1[/c]
    I've played with the P values in both to reflect the values in my config.g, but no dice.


  • administrators

    It sounds as though this line:

    M307 H3 A-1 C-1 D-1

    isn't working. What firmware version are you running? If you send M307 H3 with no other parameters, what does it report?



  • Firmware version is 1.19, I'll check the M307 command response once I get home today! Thanks for the fast response!



  • @dc42:

    It sounds as though this line:

    M307 H3 A-1 C-1 D-1

    isn't working. What firmware version are you running? If you send M307 H3 with no other parameters, what does it report?

    So, sending just M307 H3 results in:

    M307 H3
    Heater 3 model: gain 340.0, time constant 140.0, dead time 5.5, max PWM 1.00, mode: PID
    Computed PID parameters for setpoint change: P13.4, I0.095, D51.4
    Computed PID parameters for load change: P13.4, I0.949, D51.4
    
    

    Thanks for the patience, and the help. Great to see a dev continuing to support a great product!


  • administrators

    So the M307 H3 command isn't working, or else it is being overridden. Perhaps there is one in your config-override.g file as well? If so, delete it. If not, delete and re-type the original M307 H3 line in config.g in case it contains an unprintable character.



  • @dc42:

    So the M307 H3 command isn't working, or else it is being overridden. Perhaps there is one in your config-override.g file as well? If so, delete it. If not, delete and re-type the original M307 H3 line in config.g in case it contains an unprintable character.

    Ugh you're the best. I knew I was overlooking something simple…! It was overridden.

    My config-override.g is as follows:

    ; This is a system-generated file - do not edit
    ; Delta parameters
    M665 L291.060 R144.158 H387.800 B120.0 X0.000 Y0.000 Z0.000
    M666 X0.000 Y0.000 Z0.000 A0.00 B0.00
    ; Heater model parameters
    M307 H0 A100.7 C757.4 D25.1 S1.00 B0
    M307 H1 A516.8 C155.7 D2.9 S1.00 B0
    M307 H2 A340.0 C140.0 D5.5 S1.00 B0
    M307 H3 A340.0 C140.0 D5.5 S1.00 B0
    M307 H4 A340.0 C140.0 D5.5 S1.00 B0
    M307 H5 A340.0 C140.0 D5.5 S1.00 B0
    M307 H6 A340.0 C140.0 D5.5 S1.00 B0
    M307 H7 A340.0 C140.0 D5.5 S1.00 B0
    ; Z probe parameters
    G31 T1 P500 X0.0 Y0.0 Z-0.05
    G31 T3 P500 X0.0 Y0.0 Z0.70
    G31 T4 P500 X0.0 Y0.0 Z0.00
    
    

    Thank you so so much! Now I can figure the rest of this stuff out!


Locked
 

Looks like your connection to Duet3D was lost, please wait while we try to reconnect.