Re: [CAD_CAM_EDM_DRO] Reversing switch-

The three way is a double pole single throw, not a single pole double
throw. I see now that I got it correct at the top but that I made a
mistake at the bottom of the page <redfaced> Yes you would need a
separate start stop, unless you picked up a three position "left off
right" switch. The "four way" would simply add a reverse.
Mike Wood, Cincinnati

Stephen Wille Padnos wrote:

>Roy J. Tellason wrote:
>
>
>
>>On Wednesday 15 December 2004 06:21 pm, Michael Wood, Cincinnati wrote:
>>
>>
>>
>>
>>>You want either a single throw double pole switch or a double throw
>>>double pole double throw toggle switch (you just don't use one of the
>>>poles)--
>>>
>>>
>>>
>>>
>>This is incorrect. You cannot exchange _two_ wires with a single pole switch.
>>
>>
>>
>>
>>>between $5 and $10. I think Loews has them in the electrical
>>>section with the Gardner-Bender stuff. You could use a "3 way" light
>>>switch, which does the same thing. Basically one position allows for a
>>>straight through feed, while the other position crosses them.
>>>
>>>
>>>
>>>
>>A "3-way" switch is just a single-pole, double-throw switch.
>>[snip]
>>
>>
>>
>In fact, to expand on this - you can't even use a "4-way" switch. Those
>swap two wires, but both wires are always connected. You could use one
>of these to change direction only if you have a separate start/stop control.
>
>- Steve
>
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