Re: re: encoding free leadscrew end.

Or you could just make your own. I struggled for some time with rigidity
problems on commercial tool holders but the toolpost/holder I now use on the
Harrison which I home-made is rock solid and simple. It is a length of 2"
diameter
steel rod about 4" long turned down to 1 3/4" diameter leaving just a short
flange or foot on one
end and is bored right through its length for the mounting bolt (1/2"). This
is firmly and
permanently bolted down vertically onto the top slide in place of the
original toolpost. Onto this is mounted a
steel block 4" x 3" x 2" thick which is bored a close fit on the rod and
secured to it with a clamp screw across a sawn slot thus allowing it to be
positioned exactly both for height and angle. The tool is held in a
horizontal slot milled across the 3" x 2" face of the block and secured with
3 allen screws from the top. There is also a jacking screw which goes right
through the block and bears on the topslide. If needs be I could draw it up
but it's so simple it hardly needs it - it only took a couple of hours to
make and has repaid the time many times over. Oh, and I bored a recess in
the underside to clear the post flange and allow the block to go right dowen
to the topslide. I have several of the steel blocks so that I can keep tools
set up and just change them complete. Total
cost? - nothing as I found the bits of metal in a scrap yard. Obviously, the
sizes I have mentioned are what I used for the Harrison L6 and should be
adjusted to suit your lathe. The point is that it provides a simple, cheap,
easily adjusted and extremely rigid method of holding the tool.

Ian
--
Ian W. Wright
(Bandmaster of Hathersage Brass Band, Derbyshire)
Sheffield UK

----- Original Message -----
From: Jon Elson <jmelson@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: 29 September 1999 07:05
Subject: Re: [CAD_CAM_EDM_DRO] re: encoding free leadscrew end.


> From: Jon Elson <jmelson@...>
>
>
>
> stratton@... wrote:
>
> > Now if I could just figure out how to keep the armstrong toolpost
> > from migrating with the cutting force, I wouldn't have to recut the
> > half of the trumpet bell mandrel that came out oversize tomorrow.
> > (can't really complain though - it did come out oversize, not
> > undersize)
>
> This is easy. Get RID of that hideous monstrosity! I got a Phase-II
> dovetail toolpost as one of the fist machine upgrades I ever bought,
> and it was a great purchase! The machine was SO much stiffer.
> Also, the holders allow you to preset the tool height, and every time
> you put it on, it sits right at the correct height. These are usually
> advertised as a Dorian or Aloris-type post.
>
> Jon
>
> > Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
discussion of shop built systems in the above catagories.
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> List Manager
>