Simple runout switch (M591 P2) shorting Duet.

djstephenson1

Good morning all!

I am having an interesting issue. My Duet wifi 1.02 is shorting when I plug a filament runout switch into it. I have tried two different wires and two different simple runout switches. Both short the board to where I cannot even command it through YAT or Pronterface.

There seems to be mentions of this happening here. https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond#:~:text=If the red LEDs are,probe connectors from the Duet.&text=Then reconnect the USB cable and check the LEDs again.

In particular, when I plug in my filament switch, the 3.3v light shuts off as does the wifi led and a few others. The 5v and VIN led are the only ones that remain on.

I am really confused with this, as the filament runout switch was working fine until last night. I uploaded a .gcode file and everything went kaput.

Any advise on this subject will be greatly appreciated!

I am running RRF2.05.1 and DWC 3.1.1.

Thanks!

Jordan

sounds like you're connecting a normally closed switch across gnd and 3.3v. show us the wiring? (or wire the switch between say E1 stop and gnd according to the wiring diagram)

djstephenson1

That was definitely it. I swapped the wire around it works fine. What is interesting, is I have two duets. My other duet has a simple endstop inserted to E0 endstop. Also the wire is inserted at 180 degree rotation as compared to the board giving me issues. weird.

Thanks bearer