This is a nice emergency stop mushroom button you can place above any switch, this is both useful for safety and to make your machine look more impressive.

There are 3 ways to use this model:

1. You can use the entire model as-is, the box is designed to hold a 170-points solderless min-breadboard with a button in the middle, there's even a hole for the wires going into the box (in the picture you can see the breadboard but there's no button on it because I ran out of buttons and I'm waiting for a bag of buttons to arrive from China).

2. You can incorporate the panel into your design, in this case you don't need to print the box.

3. Or, you can just copy the holes from the panel into your own panel, in this case you don't need the box and the panel, obviously.

When fully pressed the button reaches 13.4mm behind the panel (when the panel is 1.4m thick)

Safety note: this is just a fancy cover for a momentary push button, it's your responsibility to make sure your machine stops when someone hit the big red stop button.

Printing instructions:

All the part are printed in PLA (except for the spring that is PETG - but ABS also works) with 1.2mm shell,1.2mm top/bottom and no support.

estop box - The walls of the box are thick, but this prints and works just fine when they are hollow, print with no infill.

estop panel and estop cover - those are all basically all shell, infill makes no difference.

estop pin - use at least 3 shells to make it solid, since it shouldn't be exposed to any sideways pressure it should work just fine with no infill - or - you can be extra careful and use 100% infill, it doesn't matter so much because its small and wont use much material either way, I printed with 10% infill because I wanted to print it together with the button.

estop button - this is the button itself, it look much better when you under extrude a bit, I printed mine at 95% flow, if the letters "STOP" on the front are too thin and not visible you need to reduce your flow (or extrusion multiplier) some more.

The button should work just fine with no infill (the important bit on the back are built on top of the shells of the "STOP" text and not on a bridge) but I printed with 10% infill to make it stronger.

If you have problems with platform adhesion use a raft and not a brim for the button.

stop spring - this is the only part I didn't print in PLA because I don't trust PLA to bend without breaking, even in PETG or ABS the spring will break very quickly under sideways forces, the button is designed to never expose the spring to such forces so it should work just fine once assembled.

You may need a brim fro this part (in this case cutting it off with scissors is the best way to get the brim off without damaging the spring).

Assembly Instructions:

1. First check if the button fits into the cover (with the pins away from the button), if the cover is too tight first make sure you don't have bits of the first layer sticking out in the round part, if that doesn't solve the problem there are two small notches inside the cover to stop the button from wobbling you can file them a bit until the button can travel freely.

2. The cover pins fits into the holes in the panel, it should be a tight fit and require some force to assembly, if it's too tight you can file the holes a bit, if it's too loose a drop of glue on each pin will hold it in place.

3. The next part is the pin, it goes into the hole in the base (bigger flat part inside), the two holes on the top of the pin should point sideways.

4. Now the spring goes into the cover around the pin.

5. And then the button should pressure-fit into the pin.

6. If you are using the box, place your electronics into it and close it with the panel.

This model was surprisingly tricky to get just right, hope someone finds a good use for it, if you do please upload a picture.