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2737Re: Tramming Spec?

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  • ballendo
    Jun 6, 2002
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      Well I guess that's what I get for not reading all the messages
      before responding...(worjking sequentially through the backlog)
      Sorry for the duplication of this I JUST posted...


      --- In mill_drill@y..., "Paul R. Hvidston" <paulh@u...> wrote:
      > The old-timers would just use a cat-whisker (bent piece of heavy
      > chucked up and a set of feeler gauges. Set the cat-whisker to the
      > point in the circle and measure the gap with the gauges. Now that
      > avoids the T-slot problem!
      > Paul R. Hvidston, N6MGN
      > ACKSYS Engineering
      > Upland, CA
      > ----- Original Message -----
      > From: "Stan Stocker" <skstocker@a...>
      > To: <mill_drill@y...>
      > Sent: Tuesday, June 04, 2002 1:31 PM
      > Subject: Re: [mill_drill] Tramming Spec?
      > > Hi Duncan;
      > >
      > > Glad to be of some help.
      > >
      > > A DTI is fine, in fact, as you can drag the indicator and it's
      > > point behind the swinging arm and avoid the whole T slot grabbing
      > > indicator rod hassle, while avoiding a lot of neck twisting to
      read a
      > > dial. The fact that a DTI doesn't indicate true when the arm
      > > is changed doesn't matter in this case, you're just
      characterizing the
      > > range of difference rather than an absolute from a reference
      > > You've noticed by now that the shim thickness doesn't seem to map
      > > cleanly as some percentage of the indicated reading, so it all
      > > down to a seat of the pants creep up on the target sort of affair
      > > anyhow.
      > >
      > > Most folks who are just tramming a mill the first time haven't
      got a
      > > DTI, I usually try not to imply the need for yet another tool
      when I
      > > post, it seems everytime you turn around someone is telling you
      to go
      > > buy another tool when you are getting started with a new
      machine. You
      > > can start thinking that boats or private aircraft might have been
      > > better choice, at least you know your wallet will get emptied by
      > > hobbies!
      > >
      > > Cheers,
      > > Stan
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