@joergs5 yes, looks like the die has pinched the crimp. Probably the wrong die shape for the crimp. Can happen as the die wears, too.

Ian

@3dprintingworld download and look at the ibom.html files for the older version of the tool boards with terminal blocks at https://github.com/Duet3D/Duet3-Toolboard-1LC which should show the terminals used. Would do it myself, but on phone!

Ian

@deckingman Thanks

@claustro said in Strange behavior bltouch V3.1:

At this time I am thinking about a defective bltouch

It does happen.

@baird1fa thank you

@phaedrux ok, thank you for all the help

It looks like the issue was a reversed power and ground wire on my magnetic filament monitor. 🤦

That was it. No more error. Will remember this. Thank you for your help 👏

Yes it's likely the mosfet was blown and failed in the on state.

the mosfets can be replaced if you're handy with an iron.

https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_Fan_mosfet

@brian thanks for everyone's help

By way of wrapping up this thread, the solution I found that works well is as follows:

Power Supply 24v to the board, a 5v Converter, and a USBC Converter. The 5v converter is wired to the 5v external power header on the board with the jumper selected to the External 5v. The 5v converter is also wired directly to the Neopixels that I am running to ensure that they get sufficient power in case there is a limit through the board ( I am using 60 Neopixels for this printer) only ground and signal are hooked to the LED header on the board. I am powering the Pi4 off of the 24v to USBC converter.

Links to the parts on amazon:
24v to 5v converter: https://smile.amazon.com/gp/product/B01M03288J/
24v to USBC Converter: https://smile.amazon.com/gp/product/B07ZQB6S3L/

@sardi YEAH!

Thanks to everybody for your time and suggestions. You have made this issue crystal clear to me 😉
Wonder why some manufacturers still ship deltas with bltouch....

@deckingman Awesome - thank you!

@alex-cr thanks, i gonna check that, the problem is that I'm new with macros and the hole RepRap thin, hopefully, I can understand

@tommyb if the screws are tight then I am sure that the resonant frequencies of the mounting mechanism will be much higher than those of the arms + effector mass that I am interested in.

@dc42 Thak you !

@arisoy I have tested that file under RRF 3.4beta7. If I have the drivers in spreadCycle mode, it works. However, if I have them in stealthChop mode and I start the file without doing the correct stealthChop tuning procedure first, then the drivers provide excessive current to the motors. So I suspect that the issue was caused by lack of stealthChop tuning in the homing files.