[pure-silver] Re: floor vibration?

I would not think that cooling air for the enlarger would likely be much of a 
factor unless you are using 4x5 sheet film.  I am not familiar with that 
particular enlarger, but if the mount feels solid and you don't feel the 
vibration near the mount or lens area, it probably isn't a problem.  You 
probably could have the fan on with the lens and lensboard off and look and see 
if you see the negative moving with the fan on.  Id use a trash negative so I 
could reach up and feel if it was vibrating.

The unique issue in your case is the second story.  Buildings naturally settle 
and its not usually level after a while.  The one thing that is more likely to 
throw you a curve ball is (ok I am watching the ball game as I type)is the 
flooring itself.  Your freestanding one may not be as isolated as you think.  
The underlayment under the flooring often over time starts creaking like my old 
bones.  When the floor creaks it can move when you shift your weight, and its 
more likely when its attached to framing rather than a concrete slab as in 
Shannon's case.  I had to work in a darkroom that had creaking floors and 
actually used the different creaks to find my way around, but I had to stay 
perfectly still during the exposure. lol  Shifting my weight would shift the 
table the enlarger was on.  There are some things you can do to fix it, but 
they usually mean taking up the flooring.

The first step I would take is to make sure the connections to what ever it is 
hooked to has not worked loose.  Any table that is shaky without the enlarger 
will be shaky with it.


--- On Tue, 9/30/08, mail1 <mail1@xxxxxxxxxxxxxxxxx> wrote:

> From: mail1 <mail1@xxxxxxxxxxxxxxxxx>
> Subject: [pure-silver] Re: floor vibration?
> To: pure-silver@xxxxxxxxxxxxx
> Date: Tuesday, September 30, 2008, 6:19 PM
> I wonder how we could accurately determine if there is
> vibration, and the
> severity of it? 
> I have three enlargers, a counter mounted Zone VI with the
> head attached by
> a rod to the wall, A Beseler MXT wall mounted with the
> Beseler mounting
> system and a free standing Durst Laberator 138S. Although
> all the enlargers
> produce shape pictures I suspect the Durst is the least
> affected by ambient
> vibration because it is freestanding. The Zone VI, and the
> Beseler have cold
> light heads, and the Durst has a condenser head with remote
> wall mounted fan
> that is used when I use high wattage bulbs. The fan and the
> vacuum easel
> both have rheostats to slow down the motors. I have not
> noticed any
> difference in image quality caused by the fans. 
> I have noticed the vacuum easel really does flatten the
> fiber based paper
> compared to my Salt Hill easel. The Condit glass carrier
> also flattens out
> the negative compared to the Carlwen holders which only
> hold the negative by
> the edges. Could the negative be vibrating in the holder
> caused by fan
> induced vibration transmitted by air? 
> Since the darkroom is on the second story of a wood frame
> house I avoid
> working when there is other activity going on. After any
> contact with the
> enlarger or counter I allow vibrations to subside before
> exposing the image.
> I have tried looking at the image reflection from the
> surface of water in a
> glass on the easel, and yes there is sometimes vibration
> present. Is the
> water surface an accurate display, are the negative and the
> image receiving
> surface vibrating in phase equally, and are the amplitudes
> equal I suspect
> not.
>  Is this really a problem? 
> I imagine there are other factors involved that effect how
> sharp the print
> appears, and these may be greater issues than vibrations in
> the enlarger.
> 
> Jonathan Ayers  [mail1@xxxxxxxxxxxxxxxxx] 
> 
> -----Original Message-----
> From: pure-silver-bounce@xxxxxxxxxxxxx
> [mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of
> Shannon Stoney
> Sent: Monday, September 29, 2008 2:07 PM
> To: pure-silver@xxxxxxxxxxxxx
> Subject: [pure-silver] floor vibration?
> 
> 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
> 
> ============================================================================
> =================================
> To unsubscribe from this list, go to www.freelists.org and
> logon to your
> account (the same e-mail address and password you set-up
> when you
> subscribed,) and unsubscribe from there.
> 
> No virus found in this incoming message.
> Checked by AVG. 
> Version: 7.5.524 / Virus Database: 270.7.5/1700 - Release
> Date: 9/30/2008
> 11:03 AM
>  
> 
> No virus found in this outgoing message.
> Checked by AVG. 
> Version: 7.5.524 / Virus Database: 270.7.5/1700 - Release
> Date: 9/30/2008
> 11:03 AM
>  
> 
> =============================================================================================================
> To unsubscribe from this list, go to www.freelists.org and
> logon to your account (the same e-mail address and password
> you set-up when you subscribed,) and unsubscribe from there.


      
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your 
account (the same e-mail address and password you set-up when you subscribed,) 
and unsubscribe from there.

Other related posts: