using BLtouch when using Duet Breakout Expansion Board

peterartechno

Hello,

I have a Duet Wifi (3.1.1) where I added a expansion breakout board for external stepper drivers.

I have reached the limitation of missing pins multiple times right now:

When I want to make an emergency button to activate M112
When I want to use a BL touch.

I already have the expansion breakout board and need it for my external stepper drivers. Since the board uses a 50 pin cable, the pins within are not useable anymore.

Is there a way to combine the expansion breakout board and still have these options?

Thanks in advance

Phaedrux

You still have access to the heater6 and heater7 pins.

https://duet3d.dozuki.com/Wiki/Duet_Expansion_Breakout_Board

peterartechno

@Phaedrux Can I use those for an end stop and/or an emergency button? If so, how do I put this in my config code correctly?

Phaedrux

For the emergency stop you would configure M581

https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M581_Configure_external_trigger

M581 P"exp.heater7" T0 C0

I think that should work.

peterartechno

@Phaedrux Thanks, can I use my heater6 or heater7 pins for my BLtouch endstop?

Phaedrux

Yes you could use the heater pins for the bltouch servo control, 5v, and ground connection. The trigger signal would still need to return to the mainboard.