BLTouch logic conversion

Harley3D · 15 Mar 2019, 00:30

I think i saw somewhere that on the newer Duet3D WiFi 1.04 boards you don't need to cut the copper line logic conversion on the BLTouch Smart. Is there any truth to this?

Phaedrux · 15 Mar 2019, 02:29

Yes it should work fine without the trace cut. If it doesn't seem to behave properly, cut the trace.

Phaedrux · 15 Mar 2019, 02:30

For all Duet 2 WiFi/Ethernet boards prior to version 1.04
If you have the older BLTouch, also connect the 240 ohm resistor between Probe GND and Probe IN. On the newer BLTouch, cut the PCB trace on the BLTouch to reduce the output to 3.3V as described in the BLTouch instructions.

The Z probe input on the Duet 2 Maestro and Duet 2 WiFi/Ethernet rev 1.04 and later is 30V tolerant, so it doesn't matter whether you reduce the output of the BLTouch to 3.3V or leave it at 5V.

https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch

tenjin · 15 Mar 2019, 03:34

i didnt cut any traces,. and works fine

Harley3D · 15 Mar 2019, 03:37

Thanks, Worry over!