[pure-silver] Re: floor vibration?

Hi Bogdan, Yes I realized there were reasons one wouldn't want the fan plugged into the timer and that is one of them. I just thought it was a humorous clever little idea. What I would actually do if I had the problem is either anchor the legs to the floor or put the fan on a heavy duty switch by the timer to turn off for the print exposure. If you turn it off and the motor stops the vibrations should stop in a couple seconds or so. 
Dennis
On Sep 29, 2008, at 21:32, Bogdan Karasek wrote:


Hi Dennis,
The problem with fans is that they don't stop on a dime, probably stopped by the time the print was exposed, so you still have some vibration, albeit decreasing, still a problem. Isolating it with bungee cords or rubber straps or other damping material might reduce the vibration sufficiently or at least dampen it.
I liked the suggestion of drilling through the floor and setting the enlarger and table through the holes and setting them on the concrete slatb which is the garage floor. A friend of mine, he's an audiofile, the best audio equipement, he drilled through the basement floor to the concrete and installed steel 4 legged stands for his speakers. My Omega D-2 is mounted on an Omega wall mount which is attached to the basement concrete foundation. It's also attached to the wall at the top. very sturdy 

Cheers,
bogdan



Dennis Purdy wrote:
My enlarger timer has a plug marked "safe light" on the back. Whatever is plugged in there automatically goes off when you start timing something. If you put the fan on a plug and plugged it into the safelight plug on the timer it would run all the time until you hit print.. presto no fan no vibration for a little while. 

Dennis


On Sep 29, 2008, at 14:06, Shannon Stoney wrote:
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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--
________________________________________________________________
 Bogdan Karasek
 Montréal, Québec                     bogdan(at)bogdanphoto.com
 Canada                               www.bogdanphoto.com

                    "I bear witness"
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