Re: [CAD_CAM_EDM_DRO] Reversing switch-

You are right. I use the switches every day, but I rarely use the
terminology. Mike

Andy Wander wrote:

>Mike:
>
>I think you still have it wrong. :)
>
>The 4-way switch, along with a separate ON-OFF switch, would work.
>
>A 3-way in NOT a DPST, it is a SPDT. This switch would NOT work in this
>application. It wouldn't work even if it WAS a DPST(but it's not)
>
>You need to have 2 poles to do the reversing. This can be done with a DPDT
>switch wired to reverse the polarity of the output when you switch it(along
>with a separate ON-OFF switch unless you use a DPDT-CO), or with the 4-way
>switch and a separate ON-OF switch.
>
>See:
>
>http://www.eleinmec.com/article.asp?12
>
>for an example of using a DPDT switch, and
>
>http://www.handymanwire.com/articles/3wayswitch.html
>
>for good diagrams of the 3-way and 4-way switches.
>
>
>Andy Wander
>Verrex Corporation
>
>
>
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