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On some of our DIY built type CNC machines - I put a three position snap switch on the control panel - center position is "Spindle Off" - left position is "Forward" and right position is "Reverse"
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In machining Tungsten I have found it is primarily abrasive - you may need to either use a harder grade of insert or slow the surface speed some. It is also usually brittle as it is a sintered...

Here is a link to GrabCAD - for the project that I did on these switch units. I have a number of these components and can answer questions if needed. Best!...

For information on the wiring see my post in this thread from Jan. 2013 - I have a diagram of the wiring on switch
I have and can send you a BOM list of parts that I have used on switch units - the...

Personally, when cutting copper and silver - we use straight oil - it doesn't take much flowrate, and it doesn't create as much smoke/mist in the work area unless you are running high spindle RPMs...

BillTodd,

The wires from handle are installed into pins 1 and 4 of the Amphenol connector - they are not polarized, so either wire may go in either position

I do not have info on the 14pin Z...

Did you get what you needed with that PDF? That is a pretty basic one - I have substantially more info if you need it - let me know!

Corndog - I can send you a sketch of the electrical hookup and the mechanical that I have - Are you wanting to make a complete unit or just rework some existing parts? Reason I ask is we had fixed...

Hi Tom in NH

I have built several of these switches for our machines - I can send you details on what I have done if you would like - I have all the internals and you can make the case to fit...