Film swings in film drier

Discussion in 'Darkroom Equipment' started by michaelbothager, Jul 16, 2017.

  1. michaelbothager

    michaelbothager Subscriber

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    Hi

    I've been testing a Durst UT 100 film drier w/ a long plastic sleeve/bag. The top is an air intake with filter, rotor and a heating coil, sucking air in and down the plastic bag. The bag has ventilation holes in the bottom to evacuate the air.

    When hanging a film in it, the film starts to swing like a pendulum in a semi-circular motion.

    Anyone who have experienced this, and any suggestions how to overcome this, so multiple films don't collide when drying?


    All the best
    Michael
     
  2. AgX

    AgX Member

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    Have you put weights at the free ends?

    In case a motion still should occur you could add a frame interconnecting all weights.
     
  3. OP
    OP
    michaelbothager

    michaelbothager Subscriber

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    Yes, bottom clips is weighted, tried both light and slightly heavier weights. No real difference, still swings like a pendulum.
     
  4. nsurit

    nsurit Subscriber

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    Is the top clip such that it free to move or is it held stationary? If held stationary, I would think the problem would be minimized.
     
  5. OP
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    michaelbothager

    michaelbothager Subscriber

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    The top clip is hanging from a small wire, so it is free to move.
     
  6. pentaxuser

    pentaxuser Subscriber

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    It may depend on what "multiple" means. I have the same set-up and while the bottom of a 36 frame film will swing slightly, I believe I could manage 4 films together, if placed towards each corner, based on the extent of the swing I have observed. I have never tried 4 films together but two are certainly OK.

    I use heavy metal weights which extend beyond the edges of the film so any swing will not result in the films touching each other.If there are 4 films in the UT 100 the weights might touch each other but then in effect will dampen down the swing.

    It sounds as if you have observed the effect of a one film swing and have assumed from that observation that this will result in film sticking to each other. Give two films together a try with metal weights top and bottom from wire hooks and watch what happens. If all is OK try 3 next time. It will be clear from the motion of 3 if 4 is possible.

    pentaxuser
     
  7. AgX

    AgX Member

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    Which is a, maybe more simple, approach to the same effect as my proposal of a frame interconnecting the weights.
     
  8. paul ron

    paul ron Member

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    put bungies from the bottom clips to the deck. Thin bungie is sold in camping stores for tent poles.
     
  9. AgX

    AgX Member

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    Won't work.
    Dryers of this built have a ventilating/heating head that is mounted to a wall and a hose from PVC foil with opening slit as drying chamber that hangs down from it. At its best they got a tiny metal ring at their bottom as weight to stretch the hose. It cannot be used to mount the films under tension.
     
    Last edited: Jul 17, 2017
  10. paul ron

    paul ron Member

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    Ah I see it now. I thought it was a cabinet, not a hanging bag.

    back to the drawing board... heavier weights then?