BLTouch on Duet 3 MB6HC

alphatitan

Hello,
I am currently trying to figure out if my config will work . So in REPRAP config tool, I've set the input pin to use IO7.in; the modulation pin is set to IO7.outthe pwm control is set to IO5.out. Can anyone please tell me if this config will work. The version of BLTouch is genuine 3.1. Thanks in advance

JoergS5

@alphatitan somewhere in the docu the I found the information:

6HC IO 4, 5, 7. Duet 5 Mini: 1, 2, 3. Duet 2 ?
io.in white, io.out orange/yellow, 5V_EXT red, GND black/brown/blue (2 wires), 3.3V empty

So for 6HC 4, 5 or 7, and the colors as above. You need only one of the connectors.

alphatitan

Hey @joergs5, thank you. Is it ok if, for the GND I only use one wire, or do I have to combine the two?

rjenkinsgb

@alphatitan
It's best to use two grounds, even if back to the same pin at the Duet board. It reduces the chance of noise pickup.

You only need one I/O connector on the 6HC; ground, 5V, in and out (out is automatically set as PWM when you configure the probe type).

This is the config I have working on my 6HC:

; Z-Probe - BLTouch
M950 S0 C"io7.out"                           ; create servo pin 0 for BLTouch
M558 P9 C"io7.in" H4 F60 T6000             ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X-46 Y4.5 Z2.840                    ; set Z probe trig value, offset (from TC face centre)+ trigger height

Adjust the G31 offsets to suit where your probe is, relative to the nozzle.