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Mendelmax Emergency Stop Button Bracket

by Stu_Dkn, published

Mendelmax Emergency Stop Button Bracket by Stu_Dkn Nov 29, 2012
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Thing Info

4379Views 575Downloads Found in 3D Printer Accessories
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Summary

As I quite often leave my printer running when I'm out the wife wanted an easy way to stop the printer if anything goes wrong. (I have no idea what she can mean ;-) )
Anyway I bought an emergency stop button from china (ebay) and this is the resulting bracket.

There are two versions one that fits around the corner bracket and another without the cut out.

It's just a shame I had run out of black ABS.

Instructions

Print it ;-)

Bolt the cut out switch to it and then bolt it to the printer. The switch is rated 600v @ 10A and is a double pole so when I connect it I will take the mains Live and neutral from the IEC Mains socket through the cut out switch before it goes to the solid state relay and the power supplys.

To find one just search ebay for "Emergency Stop Push Button"

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I did your search and found  the following here. Without anywhere else to share I thought readers of your Thing would be a good audience. Explains why a normal button wont do.

Question

   

  What is the difference between a push button 
  switch for an emergency stop and a general-purpose push button switch?

 

   

  Answer

  A general-purpose push button switch is used for controls, e.g., to start 
  machine operation or to switch modes. An emergency stop push button switch 
  is used as a safety measure to stop hazardous parts (loads).

  An Emergency Stop Switch must be highly visible in color and shape, and 
  must be easy to operate in emergency situations. The following 
  requirements are specified in the European Standard EN 418 (International 
  Standard: ISO13850).

  1. A direct opening mechanism must be installed on the NC contact.

  2. There must be a self-holding function.

  3. The button must be a "mushroom" head design or something equally easy 
  to use.

  4. The button must be red and the background must be yellow.

  In addition to the 4 points mentioned above, the emergency stop control 
  circuit must have countermeasures for each category.

  There is no difference between a general-purpose push button switch and an 
  emergency push button switch regarding the function of the NO contact.

  A general-purpose push button switch doesn't have a direct opening 
  mechanism on the NC contact. If the contact welds, conduction will be 
  maintained and the device cannot be stopped in a hazardous situation 
  (load). If this occurs, the device may keep operating in the hazardous 
  state. Therefore, use the NC contact of an emergency stop push button 
  switch for safety applications.

 Good job, in my view anything that is big red and shiny must be ok!

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