Re: [CAD_CAM_EDM_DRO] Re: LOOKING for homeshop EDM or its power supply?

turbulatordude wrote:

>A wire EDM with a 0.004" thick wire on a 1 inch thick block willl
>need to move 250 inches to remove one cubic inch.
>
>a wire that is 0.012 thick will move 83.3 inches to remove one cubic
>inch.
>
>so, yes, one can use cubic inches to calculate metal removal but....
>

Yes and comparing the cut speed using 4 thou wire vs 12 thou wire is
hard to do if you don't use a cubic relationship. I'll bet the
relationship is not linear, due to the lenth of the cutting arc
described by the circumference of the wire. The only way one could
possibly compare between machines is to use the same diameter wire. If
the wire size is not stated, it all comes down to something like "Sears
& Roebuck Horsepower" :-). Or plain BS for sales purposes.

>No one lists how they arrive at square inches.
>

That is the BS factor. Of course, a competant buyer will ask the right
questions.

>anybody know if there is a formula for the ammount of energy needed
>to remove a cubic inch of metal ?
>

Years ago the Russians published a lot of academic papers on EDM. They
seem to have studied everything you can think of. Engineering abstracts
could probably answer that question.

>I wonder how operational costs might be for different metals ?
>

That would be related to the amount of energy needed to make a crater of
a given size in a given alloy. Those data are available somewhere but
it has been years since I've seen them.

JerryK