Duet 2 Wifi and Duex 5: BL Touch Wiring

JRCL

Hello all,

I see that for wiring a BL Touch to a Duet 2 you put the signal cable on the expansion port heater pin. However, I also have a Duex 5 connected so that pin isn't very accessible unless I get fancy with some splicing and wiring. I'm wondering the correct way to get around this is? I couldn't find anything to clear after poking around with the search function so hoping this topic hasn't been covered in-depth and I just can't find it. Thanks in advance!

oliof

@jrcl does https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Duet_2_WiFi_Ethernet_with_DueX2_DueX5_or_Expansion_Breakout_Board help?

JRCL

@oliof Yes! so should my M950 and M558 in my config.g for z probe be:

M950 S0 C"E2_PWM"
M558 P9 C"E2_PWM" Hn Fnnn Tnnnn

so that it knows to use those pins?

droftarts

@jrcl Use the new wiki page: https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_connecting#wiring-the-bltouch

The wires for +5V, the 'control' wire for the pin and ground get wired to a PWM port on the DueX. The 'out' wire and the other ground connect to the Probe In pins on the Duet.

Scroll down a little bit further for the configuration. Basically:

M950 S0 C"duex.pwm[PWM_port_number]" ; Duet 2 WiFi/Ethernet + DueX2/5
M558 P9 C"^zprobe.in" H5 F120 T6000 ; Duet 2 WiFi/Ethernet, DueX2/5

Ian

Phaedrux

No the M950 and M558 pins need to be different. M950 is defining the PWM pin for servo control. M558 pin is for the input signal.