2737Re: Tramming Spec?
- Jun 6, 2002Well 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
> > dial. The fact that a DTI doesn't indicate true when the arm
> > is changed doesn't matter in this case, you're just
> > 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
> > DTI, I usually try not to imply the need for yet another tool
> > post, it seems everytime you turn around someone is telling you
> > buy another tool when you are getting started with a new
> > 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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