Re: [CAD_CAM_EDM_DRO] Re: Scraping

INcidently....if your going to machine the dovetails from "scratch" making
separate pieces isn't necessary. All you need to do is some astute, yet
simple calculations and you can machine the dovetails to fit perfectly right
from the beginning. The calculations required are shown, complete with
diagram and formulas in the Machinery Handbook.

Smoke

>Hi Chris,
>
>Why not make it as two separate bits. That is, mill the dovetail sides on a
>metal plate and then, after finishing it, bolt it onto a flat metal
>backplate. That way its much easier to adjust the dovetails to size as you
>can see what you are doing on the bench and you can then easily align the
>head before finally fitting steady pins and screwing it in place (with
>threadlock)
>
>Ian
>--
>Ian W. Wright
>Sheffield UK
>www.iw63.freeserve.co.uk
>----- Original Message -----
>From: "Chris Stratton" <stratton@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: 13 July 2001 20:08
>Subject: Re: [CAD_CAM_EDM_DRO] Re: Scraping
>
>
>> Since scraping has come up, I'm wondering if anyone could comment on
>> how one scrapes the inside-slanted surface of dovetails? I was thinking
>this
>> morning that if I ever finish getting the ballscrews on the lathe, it
>> might be nice to make some provision for mounting a mill head on the
>> ways and clamping work to a larger, T-slotted cross-slide. This would
>> require milling and then scraping a dovetail way.
>>
>> (I seem to recall Metal Lathe Accessories make a slotted crosslide
>> kit, which perhaps I should look into for an answer to my question).
>>
>> Chris
>>
>> --
>> Christopher C. Stratton, stratton@...
>> Instrument Maker, Horn Player & Engineer
>> 22 Adrian Street, Somerville, MA 02143
>> http://www.mdc.net/~stratton
>> NEW PHONE NUMBER: (617) 628-1062 home, 253-2606 MIT
>>
>>
>>
>>
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