Re: LOOKING for homeshop EDM or its power supply?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jerry Kimberlin
<kimberln@c...> wrote:

> turbulatordude wrote:
>
> >This is one reason wire edm is so popular. the slit is small so

less

> >mass is removed.
> >
> No, the same amount of mass is removed. The width has nothing to

do

> with it. You have to measure it in cubic inches per unit time.
> Anything else doesn't make any sense as an EDM is a three

dimensional

> machine and EDM is three dimensional metal removal. All slots have

a

> width, length, and depth.
>
> >The back cover of this months EDMtoday shows a wire EDM rated for

34

> >in2/hr. that is 34 square inches per hour of a 34 inches in a one
> >inch thick piece of stock.
> >
> Should be 34 in3/hr. Lots of dummies out there. Education isn't

what

> it used to be especially in math.
>
> JerryK

um... almost.

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....

Wire EDM's, at least in the two ad's in EDM Today magazine, list
square inches, not cubic inches.

"Its sturdy, fixed-bed table brings maximum rigidity while its
machining speeds reach up to 350mm2/min. "
http://www.makino.com (search for EDM)

The Mitsubishi 47 square inches per hour can also be found on their
webpage.

http://www.mitsubishi-world.com/

also, on their product page,
http://www.mitsubishi-world.com/products/edm/wire_products.htm#

the FA20V listes 170 square inches an hour in 4 inch aluminum.

No one lists how they arrive at square inches.

Bringing this back to a home shop, plunge or ram EDM will remove
metal at a mass, so for us home guys, cubic inches is more typical.

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

I wonder how operational costs might be for different metals ?

Dave




Dave