There was a message thread here a few weeks ago about how to plumb a
tower, with several suggestions ranging from using a plumb bob to a
laser level to a transit. I've been installing the base for my new
freestanding tower the last couple of days, and since the legs taper
toward the center I needed a fairly precise way of making sure all three
base legs tilted the same amount. I remembered that I had previously
bought a digital angle gauge to use for setting blade angles on a table
saw, so I dragged it out and it worked great. It has a magnetic base
that attached easily to the steel tower legs, and the rated accuracy is
0.1 degree. I have no way of verifying the absolute accuracy of the
thing, but I did spend quite a lot of time checking the repeatability
and I can confirm that it is indeed within +/- 0.1 degree. It really
made the job very easy.
I'm sure that there are several similar models, but the one I happen to
have is made by Wixey and it is available from several online suppliers
for less than $40.
For what it may be worth ...
73,
Dave AB7E
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