[pure-silver] Re: bad vibrations

Shannon

Have you tried to talk to Odyssey Sales in London, UK. They are the European
distributor for DeVere. Also, I thought they bought the rights to DeVere,
but I might be mistaken.





Regards



Ralph W. Lambrecht

http://www.darkroomagic.com







On 2006-01-29 15:32, "Shannon Stoney" <sstoney@xxxxxxx> wrote:

>> Rob a écrit :
>>> don't have that model but on an L1200 the fan
>>> is in the head. The fan is mounted on a rubber
>>> block to absorb vibrations. There is a transit
>>> screw which needs removing from the fan and
>>> reduces vibration dramatically. Don't know if
>>> there is something similar on your enlarger but
>>> if there are tubes then it sounds like fan is
>>> not mounted in the head.  In which case, is the
>>> enlarger mounted on a solid floor or is it
>>> standing on boards. If its on boards then try
>>> stamping on floor to see if it causes vibration
>>> because if it does then it could be you moving
>>> about that causes the problem.
>>> 
>> Hi !
>> I think the main problem is air flow.
>> You suck (is this the correct English term ?) air
> 
> 
> Yes, it is, but my email software gets mad every
> time I use that word and puts it in red type, in
> case I am flaming somebody I guess.  Or writing
> pornography to send to children.
> 
>>  from the air, causing
>> a certain depression. You need the same amount of air to come into the
>> head. If the holes are of too small a surface, air has "to find it's
>> way". So it sucks the carrier's glass (as it has a large surface, force
>> is big, even if pressure is low) raising it until air flows. Then
>> pressure drops and the glass "falls" and this cuts the air flow. And
>> again, and again... causing the vibrations.
> 
> 
> You can see this happening when you look through the grain finder!
> 
>> Try to check for an exploded view of the head to see if you've not
>> sealed a pressure relief hole somewhere ?
>> Try replace the air filter (this would reduce the air flow, so reduce
>> pressure)
>> Is the neg carrier the correct one ? Is it correctly mounted (if you
>> reverse something you may have closed a gap between it and the housing
>> blocking air flow...)
> 
> 
> I think the negative carrier and everything is right.
> 
>> The main problem we face, now, is that people knowing these big
>> enlargers are scarse... So getting advice is difficult, even from the
>> manufacturer, if it still exists. I urge you to get all the
>> documentation you can get, even the maintenance manual, as it often
>> shows how to dismantle and rebuild the beast.... And helps putting the
>> right part into the right place !
>> Hope this helps !
> 
> 
> I think you are right that I need a manual. I
> know where I can get one.  The Devere company has
> a distributor in Canada called KHBPhotographix.
> They have gotten parts for me in the past, and
> they have the manuals.
> 
> My tech guy that has helped me with this monster
> of an enlarger told me that a chinese company
> bought Devere.  The original inventor/owner sold
> it to the chinese becuase they were going to copy
> his design anyway, and he thought it was the only
> way he could get any money back for his
> intellectual property!
> 
> --shannon
> 
>> --
>> Ce message est constitué d'au moins 50 % d'électrons recyclés.
>> Aucun électron n'a été blessé ou forcé d'aucune manière
>> pendant l'écriture de ce message. S'il vous plaît aidez nous
>> à conserver nos ressources, recyclez vos électrons !
>> 
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