[pure-silver] Re: floor vibration?

I have designed and had built many darkrooms. The iso issue is a 
pain but so far the best is to have the enlarger and its table well 
isolated from anything wood. Or anything wood that the wind blows 
against. So get the enlarger on the concrete and level the table.
A simple solution is build a steel framed three legged table. It will not 
rock. It will never need adjusting short of its first trim. The last table I 
built was an equalateral triangle with 4 feet on a side made from 
1inch angle for the frame and 1.5 inch sq legs. The apex faces away 
from you. Sounds weird but it is strong. By the way it's all welded No 
bolts.
Ken

I have a question about the new darkroom that I'm building in a 
garage in
my back yard.

My old darkroom was a box inside a garage.  The floor was a 
concrete 
slab.

  In the new darkroom, we had a wooden floor built on top of the 
slab,
because the slab was so uneven.  The walls are now tied in with the 
floor,
and there is a vent hood mounted on one wall, with a fan on a shelf 
next to
the hood to pull air through the vent hood.  In the old darkroom, the
vibration from the fan vibrated the wall, but not the enlarger, 
because the
enlarger sat on a table on the concrete slab.

Today I suddenly got worried that the vibration from the vent fan on 
the vent hood over the sink would vibrate the floor, because now the 
floor is tied in with the wall.  Then if the floor vibrates, the table that
the enlarger sits on might vibrate also.

So, what should I do to prevent this from happening?

--shannon

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Ken Hough Photographic Repair Service
Specializing in the Complete restoration of
           Deardorff View Cameras 
                            Est 1982
     www.deardorffcameras.0catch.com
                      219 462 0281



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