bltouch on duet maestro

JonDaniel

@jcwild I'm not sure how much additional help I can be, but i am also running a genuine BL Touch on a Maestro board. I just went and checked my connections against yours, and your wiring is correct. Also, my bltouch wiring is ~ 24" long, with 1 JST connector in the middle, ~~so i wouldn't think that the wiring itself was too terribly sensitive.~~ I retract this, and after reading what @Phaedrux has been saying, i agree there must be ghosts in the wiring Do you have the means to re-crimp a new one?

Edit:
I've pasted the probe section of my config. Hopefully this will give you a starting point for troubleshooting.



; Z-Probe
M558 P9 C"^zprobe.in" H5 F1500 T8000            ; set Z probe type to bltouch and the dive height + speeds
M950 S0 C"zprobe.mod"                           ; create servo pin 0 for BLTouch
G31 P500 X0 Y-43 Z2.35                          ; set Z probe trigger value, offset and trigger height
M557 X0:117 Y-6:81 S23.4                        ; define mesh grid

Quality of Life Improvement:
I would suggest setting up a macro for resetting the BLTouch in the event it ever enters an error state. (eg. if you crash the probe on deployment.) Especially when troubleshooting, it'll come in super useful!

M280 P0 S160 I1

Gixxerfast

@phaedrux @jcwild A question/observation. Do you know how these clones work in regard to logic levels? I see that the Z_PROBE_MOD pin is, as far as I can see, a 3.3V logic level pin and I haven't been able to find any information that the 3DTouch is working with 3.3V

Isn't a logic high often relative to the input voltage, (therefore sometimes Neopixels work with 3.3V if the input voltage is low enough)?

I see that the same output is buffered to 5V to the servo pin. Is that an option to see if it could work (more reliably.)

jcwild

@jondaniel yes i agree something is wrong with my original wiring. i just recrimped a new cable and thats what that picture is of. Thanks for the config.

JonDaniel

@jcwild No problem. Since i'm running nearly the exact setup you're having trouble with, if you need anything specific from me to reference while troubleshooting just let me know!

jcwild

@gixxerfast afaik this clone is supposed to be of v3 which is supposed to be 3.3v

jcwild

OK so i plugged that new harness into the original sensor off this machine and it deploys and retracts with commands!

jcwild

now that i know i need to redo my wiring, what awg should i use for this stuff? i used 28 awg idc ribbon cable and the length was about 2.5 maybe 3 feet. should i just get some ethernet cable or something?

Phaedrux

That cable is probably fine for gauge, it's just that it needs to be connected. The smaller the wire, the more fragile it can be. Ethernet cable would be fine as well, but the same thing applies.

jcwild

@phaedrux yeah well i made a connector for everything on the extruder carriage thats 16 pins and 2 larger gold plated pin and socket for the hotend heater so ive largely been worrying about that. I just upgraded my i3 to one of these bltouch clones after battling temp inconsistencies with an induction sensor so i figured i should do the same to this one. Here are some pics of the connector

jcwild

so i took the 2nd bltouch and put it back on my other machine and now it doesnt work lol. i guess it broke somewhere along the way. it still deploys and retracts, but doesnt detect the probe movement

ashillis

This post is deleted!

ashillis

@jcwild I have the same problem as you，I tried to keep the bltouch wire away from other wires, because they interfere, so I solved the problem. Also, please use the original wire, welding and redoing are useless

jcwild

@ashillis mines working fine now wired through my connector all mounted up properly. i wasnt welding anything, all crimped connections. no interference. just shoddy connections preciously