Re: EDM - Filter Comments

Home built.

Cutting Rates- Don't know yet. I am shooting for surface finish as a
primary objective. Speed is essentially irrelevant to me.

Feed Method - I am using a Taig mini mill with Nema 23 steppers to
control each axis. Gecko drives for the steppers. The only part of
the Taig that needs computer control is, of course, the Z axis.

As for the actual controller, I am using a Cyngal 8051 development
board to control the steppers, measure current etc..

Flushing is done by a Rio powerhead pump. I attach Locline hose to
it and use one of their nozzles to flatten the output stream into the
area I need it.

--- In CAD_CAM_EDM_DRO@y..., "Carlos Guillermo" <carlos@v...> wrote:
> Hi Gary -
>
> Is this a home-built EDM machine, or commercial one? Could you
> tell us a little more about it? Like cutting rates, feed method,
> flushing, etc?
>
> TIA,
>
> Carlos Guillermo
> VERVE Engineering & Design
>
> -----Original Message-----
> From: garyswindell@h... [mailto:garyswindell@h...]
> Sent: Monday, November 19, 2001 3:10 PM
> To: CAD_CAM_EDM_DRO@y...
> Subject: [CAD_CAM_EDM_DRO] Re: EDM - Filter Comments
>
> I use a product called Oilguard (http://www.oilguard.com) for the
> filter. This is a canister type unit with two threaded ports (in
> and
> out). The actual filter uses tightly wound cotton fibers. They
> claim < 1 micron filtration. The flow rate is about 20 gallons
> per
> hour which is fine because my tank is only about 1.5 gallons. For
> pumping I use a high pressure fuel pump. It runs on 12 volts and
> provides the necessary pressure (~50psi) to run the oil through
> the
> filter at the required flow rate.
>
> Overall I like how this works. It was not too expensive (< $200)
> and
> does a very good job. I had been running tests with a 5 gallon
> pail
> of the EDM fluid and no filtration. It had turned very dark brown
> (could not see to the bottom). Once I got the filtration system
> together it turned the 5 gallons crystal clear in about 20
> minutes.
>
> Not sure how long the filter elements will last but they are only
> about $5 to replace.
>
> > Probably, a fluid flushing system with filters, or going to
> distilled
> > water might fix the problem. Clearly it would eliminate
> breakdown
> > of the fluid into carbon.
> >
> > Jon
>
>
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