Re: [CAD_CAM_EDM_DRO] Re: Feed and Speed calculator, what the HECK?

Thanks for the info and clarification, Ray. This makes sense and sounds
like it comes from lots of experience - something I lack.

This should somehow be incorporated into the formulas...

James

----- Original Message -----
From: "Raymond Heckert" <jnr@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, April 19, 2002 12:36 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Feed and Speed calculator, what the HECK?


> Measuring the chips won't do... As the tool 'cuts' the stock, it actually
> pries little slabs of material away from the stock, and these slabs stack
> up to make the chip, at a specefic angle with respect to the mat'l being
> cut, the cutting angle, the mat'l doing the cutting, etc. Anyways the
> measured chip thickness is usually 1.25 to 1.75 times the actual feed into
> the cut. I generally try to keep my chip load down to between .0005 to
.002
> per flute, with less than twice the tool dia for depth of cut (where less
> than half of the tool dia is engaged in the cut). When making a full
> profile cut, I try to limit my depth to 1.5 times tool dia, mist
> coolant/lubricant, and vacuum out the chips continuously!
>
> RayHex
>
> ----------
> > From: James Stevens <stevens@...>
>
> > I took the recommended chip thickness right out of the Taig manual. If
I
> > remember correctly, it listed a range of 0.005 - 0.010" so I picked on
> the
> > low end. This value is one of the 3 blue user inputs (# of flutes,
> > diameter, and avg. chip thickness) in the spreadsheet. My understanding
> of
> > chip thickness is just the thickness of chip that is cut. I assume this
> > could be gathered imperically by picking up some chips and measuring the
> > thickness. Anyhow, to change it, just type in a new value over the old
> one
> > and the sheet will update with the new values.