RE: [CAD_CAM_EDM_DRO] Re: Off on an interesting tangent (bellows- way covers)

I was actually thinking of old cardboard printer tubes, some spiral spring,
a little plywood, and .020 thick polyethylene film (mcmaster carr number:
86255K31 ) a few angle brackets, and 1/4" dia shaft, and some brakeformed
.09 aluminum for a case and you'd be set!
---Dave L.

-----Original Message-----
From: caudlet [mailto:info@...]
Sent: Thursday, March 27, 2003 4:11 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Off on an interesting tangent
(bellows-way covers)


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "mayfieldtm" <mayfiet@i...>
wrote:

> I've used what's called `Constant Force Spring'
>
> It's the tape part of a tape measure!
>
> Fit it in a groove and the free end will keep
> itself rolled up.
>
> Use one on each side of the carriage or whatever
> so they will balance each other out.
>
> I've seen it about 1-1/4" wide, would think
> it would be available in wider stock.
>
> Tom M.

a quick look at Mcmaster-Carr shows the widest they have is 2.00 in
and the tension force is 40lbs. I don't think adding that
much "pull" laterally on my router head is wise. A simple window
shade has a mechanism that I think I might be able to adapt to the
task.


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