@redemptioner said in BLT Touch - duet Wifi:
This is a very common problem with the BLTouch as it is basically a useless device. The design relies on some heatshrink to hold the magnet to the probe for Hal sensor and set the length of the probe, this is of course sensitive to heat making it useless when mounted anywhere near heat (like your hot end).
Do yourself a Favor and get a DC42 IR Sensor.
I have a BLTouch on a Kossel Mini and it works perfectly well to set Z to zero at the start of the print. Very reliable. No good for probing, of course, due to effector tilt but that's not really the probe's fault. I have previously had a dc42 IR sensor and never managed to get repeatable results from it so it's definitely a case of YMMV. I also have a Orion Piezo thing and that is another story!