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 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. 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...) 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 ! -- 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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