SoliForum - 3D Printing Community — Emergency Stop Button

Re: Emergency Stop Button

2014-02-17T22:43:50Z

The signal a RPi will send to a relay will only be about 3.3VDC so you do not have to go too large with the wire AWG. I put the emergency stop between the PSU and the control board so killing the power appears to be instantaneous.

Re: Emergency Stop Button

2014-02-17T22:26:50Z

My SD3 power supply is controlled through a Raspberry Pi and a relay to the AC power.
I did it this way to be sure the PSU is completely switched off.

I might connect an Emergency Stop button to the connnection between the RPi and the relay, killing power with no hazardous voltages and with thin wires. But as the PSU contains some capacitors there might be 1/2 second delay from when you kill AC power and the printer actually stops.
The solution AJdoodler is ideal in this case but since you carry DC power you need bigger wires, the longer the bigger, to compensate for losses. Am I right?

Re: Emergency Stop Button

2014-02-17T04:19:40Z

Both of those also work just fine. I found the soft switch to not always work and I wanted something to instantly kill power to the faulty printer. I also have multiple things plugged into the same power strip so killing the entire strip messes other things up. This just seemed like a cheap and easy fix.

Re: Emergency Stop Button

2014-02-17T04:03:51Z

I have a less obvious kill switch in the form of a power strip with a foot switch underneath the desk with my Solidoodle. I have to say I have found it useful many a time...

Re: Emergency Stop Button

2014-02-17T03:57:35Z

Theres also the emergency stop soft-button in Repetier-Host that achieves the same thing using the stop gcodes etc. Top right hand corner - "Emergency Stop"... it resets the printer and reconnects...

The soft-button works fine except if your printing standalone, where you'd have an LCD, which come with the stop buttons wired up anyway.

Emergency Stop Button

2014-02-16T23:47:00Z

For those of you that hate having to plug and unplug your printer every time you want to turn it off or every time there is a failed print; I have documented how to install an emergency stop button on your printer. I used the polycarbonate enclosure I made to hold the stop button. If you do not have a case I am sure you will be able to print a mount for it. The build documentation is attached let me know if I left out anything. A BOM is also in the document.