Emergency Stop "Mushroom" Push Button

myminifactory

This is a fantastic safety stop mushroom button that you can mount above any switch, making both your machine look more impressive and adding an extra layer of safety. There are three ways to utilize this model: You can use the entire model as-is, with the box designed to hold a 170-points solderless mini-breadboard featuring a button in the center. The box even has a hole for wires going into it (in the picture you'll see the breadboard, but there's no button on it because I ran out of buttons and I'm waiting for a new shipment from China). You can incorporate the panel into your design without printing the box. Or, you can simply copy the holes from the panel into your own panel, eliminating the need for both the box and the panel. When fully pressed, the button extends 13.4mm behind the panel (when the panel is 1.4m thick). Safety note: This model serves as a decorative cover for a momentary push button; it's up to you to ensure that your machine stops when someone presses the large red stop button. Printing instructions: All parts are printed in PLA, except for the spring which is PETG (but ABS also works). The settings used were 1.2mm shell, 1.2mm top/bottom, and no support. estop box - The walls of the box are thick, but it prints and functions just fine when hollow. Print with no infill. estop panel and estop cover - These parts are basically all shell; infill makes no difference. estop pin - Use at least three shells to make it solid since it shouldn't be exposed to sideways pressure. It should work just fine with no infill, or you can use 100% infill for added security. Since it's small and won't use much material either way, I printed mine with 10% infill so I could print it together with the button. estop button - This is the button itself; it looks better when under-extruded a bit. I printed mine at 95% flow, but if the letters "STOP" on the front are too thin and not visible, you may need to reduce your flow (or extrusion multiplier) some more. The button should function just fine with no infill (the important parts on the back are built on top of the shells of the "STOP" text and not on a bridge), but I printed it with 10% infill for added strength. If you have problems with platform adhesion, use a raft instead of 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 quickly under sideways forces. The button is designed so that it never exposes the spring to such forces; it should work just fine once assembled. You may need a brim for this part (in which case cutting it off with scissors is the best way to get the brim off without damaging the spring). Assembly Instructions: 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 any 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. The cover pins fit into the holes in the panel, requiring some force to assemble. 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. The next part is the pin, which goes into the hole in the base (the bigger flat part inside). The two holes on top of the pin should point sideways. Now the spring goes into the cover around the pin. And then the button should pressure-fit into the pin. If you're using the box, place your electronics into it and close it with the panel. This model was surprisingly tricky to get just right; I hope someone finds a good use for it. If you do, please upload a picture!