Re: [CAD_CAM_EDM_DRO] Re: Size of leadscrew clarification

Hi my namse is Russ, If I may..... cutting that slow will only burn up your
bit, 50 ipm, would be a good starting point, use a two fluted straight bit
for clean cut. Unless your cutting small complex contours, faster rates
are your best bet. Oh, yes, if you can use some kind of dust collection
when cutting, helps clear the path and take away heat.

Russ

----- Original Message -----
From: William Scalione <wscalione@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, March 14, 2002 3:30 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Size of leadscrew clarification


> > >The purpose of this router is to cut model aircraft parts in balsa in
> > >plywood, with 3/32 and 1/8" thick being most common. Based on my
limited
> > >experience doing the same with a Fadal VMC, about 20-25 ipm is the most
> > >pratical for the 1/8" bits I'm using (I could experiment some more
> > >though, but I don't think it'll go over 50ipm tops). Rapid travel is
not
> > >a issue. Thicker material can be done in multi passes, but would be
rare.
> > >The maximum size is 12"x 48".
> >
> > If you were milling or turning metal I would agree with your speed
plans,
> but for balsa, even plywood I think you are being too conservative.
>
> John,
>
> Gotta agree with Fred here, using a 3/32 bit I have been cutting .200
depth
> in all kinds of wood at 120 IPM. I'm sure it would go a lot faster but
> that's
> plenty for me. For cheap bits that would work great for your purpose get
> some of these circuit board drill bits at
> http://tinkers-emporium.com/newpage31.htm
> The picture shows a rasp like bit, but the picture of the bit in the
marble
> are the ones I am using. Best part is they are only about $10.00 for 50 of
> them off ebay. If you break one, who cares. They are solid carbide and are
> basicly
> just a up spiral router bit with a small point on them. If you need a flat
> bottom you can grind them flat. 1/16" gets into small corners. Here is an
> auction he just had on ebay
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1702160733
>
> Email or call him and tell him you want a package of 50. Come in 1/16
> and 3/32.
>
> Just yesterday I was about to go to home depot and get a $30.00
> diamond hole saw to cut faucet holes into some floor tile that I am
putting
> around my bathtub. I decided to try it on my router and cut 3 1.25" holes
> into the tile with one of those bits using a spray bottle filled with
water
> for
> coolant. Cutting balsa wood it ought to last years
>
> Bill
>
>
>
>
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