Voron 2.4 (300mm) Front Skirt E-Stop button

Place to mount an E-Stop button on the front left skirt of a 300mm Voron 2.4
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updated February 27, 2023

Description

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Mount for an e-stop button for a Voron 2.4 (300mm).

 

BOM

Printing

Print in the orientation of the STL. There are built-in supports - these should break away after printing. If your slicer creates supports, you've done something wrong - turn them off!

This should be printed with the standard voron settings in ABS.

Assembly

The switch should be orientated so the white retaining clip points towards the motor (away from the centre of the printer). There is a cutout on the back of the part that allows room for it to clip into place.

There are two locating pins on the front face of the skirt piece which will orient the cover vertically. Watch out not to snap these off - they are tiny, and only held on by layer adhesion!

There is an STL for a tool which makes tightening up the retaining nut much easier.

Wiring

This can be wired however you want. Some ideas are:

  • The contacts could be wired in-between line voltage and the 24v PSU, meaning you can quickly power off all 24v electronics. This would then cause klipper to fault as the MCU would be lost, causing the bed to shut off.
  • The NC contacts could be wired to the host MCU's GPIO (Pi) and used to trigger klipper's estop function
  • Something else?

I'm using this to power off the 24v PSU, which means I can use it to adjust wiring on my printer main board as a side-effect, while keeping the Pi on and booted. Saves me from shorting things out like an idiot.

It may be possible to put the whole printer (or at least 24v and heated bed) through the printer, but these estop switches have a lower current tolerance to the switch on the back of the printer, so may not be rated sufficiently.

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