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Thread: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

  1. #541

    Join Date
    Jun 2006
    Posts
    49

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    I plan to do a write up on durst 8x10 enlargers, there fore i
    need your input.
    I will feed back all information to this forum.


    First i made an educated guess, on how many durst 8x10
    enlargers are still around in working condition.

    For europe my best guess is 20 plus minus two sigma.
    This includes l184 and l1840, with various color heads.

    1. What durst enlarger do you own, l184 or l1840 ???
    2. What colour head is fitted ???


    Thanks for your cooperation...

    George w.






    Quote Originally Posted by george w. View Post
    hello,
    i am located in luxembourg europe. Among other materials, i
    have two durst enlargers, an l184 and an l1840.

    My background is electromechanical engineering and hamradio
    operator.

    The problem you mentioned is well known, and there are several
    solutions.
    I will give you per pm my phone number, so you can give me a call.


    George h. Wagener
    gwagener@pt.lu
    00352/671/547.500

    ...

  2. #542

    Join Date
    Jun 2006
    Posts
    49

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know... ...REBUILDING

    Having been working twenty years on gas turbines, i want to apply
    this methodology to durst enlargers.

    Gas turbines have yearly preventive maintenance, after 7 years, there
    will be a major revision, called time zero rebuild.
    After this the turbine is ready for another 7 years of service.

    A gas turbine is expected to undergo several time zero rebuilds,
    in its life.

    My project consists of applying this concept to enlargers.

    Deliverables are sparepart kits to keep the enlarger in
    working condition.
    Ideally this will be n.o.s. New old stock
    otherwise a turnaround needs to be engineered.

    I want to know from the users which spare parts they would like to have,
    but are not available.???????



    thanks for your input
    i will feedback your answers to this forum...

    George w.


    .

  3. #543
    ic-racer's Avatar
    Join Date
    Feb 2007
    Posts
    6,737

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    From my decade of ownership of the L1840, I'd rate the items like the following. Interesting to see Drew's list of importance too, I think he has a different model.

    Failure rate for items on my enlarger (all these items were replaced or repaired on my enlarger, this list is a guess at the order in which the failures occurred):

    1) Indicator lamps
    2) Main Lamp (COLAMP2000/Thorn HX27)
    3) Main Lamp Reflector
    4) Negative Carrier AN Glass
    5) Connector cables and multipin connectors (Siemens)
    6) Bellows
    7) Power supply
    8) Electric shutter
    9) Push buttons on the controller (Mountain)

  4. #544

    Join Date
    Sep 2017
    Posts
    112

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Hi,

    Is it possible to remove the baseboard arm from the 1840 chassis?

    Bests,
    C
    The Container Lab
    www.thecontainerlab.com/blog

  5. #545

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Hi everybody,

    Just a little update here - I’m in contact with a fellow who might be able to sell me the missing gear, which he had 3D printed. I will get back to you when I have a confirmation.

  6. #546

    Join Date
    Jun 2006
    Posts
    49

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Andreas,
    could you please post a photo to the forum. Thanks.
    Possibly with a ruler included for scale.

    I would be interested to know what plastic is used.

    I remember the originals ere made of delrin or nylon.
    These plastics are very soft and shock absorbing.

    The warning i was posting was related to the return
    steel spring.
    This spring is under high tension, and durst had published
    a warning, after several people had been severely wounded...

  7. #547
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    18,338

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Something more akin to Delrin or UHMW nylon, which machines well and is durable. Ordinary nylon is soft in a bad sense, and wears out quickly.

  8. #548

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Hi George and Drew,

    I will absolutely share a photo once I hear back from the fellow who has had them made. If he doesn't follow through and nobody else has any, then I will try to have one manufactured, and then the questions will start about what to make them in. It's obvious that it needs to be a quality version of nylon which can properly replace the broken gear. I'm looking for a proper solution here.

    There has previously been mentioned that there is a French company which makes these gears, but I haven't seen any part numbers or other useful information. That would be amazing if it could be bought from somebody who makes it, but I'm not sure I have the time to try and track that information down.

    I will keep everybody posted on the project.

    Best,

    Andreas

    Quote Originally Posted by George W. View Post
    Andreas,
    could you please post a photo to the forum. Thanks.
    Possibly with a ruler included for scale.

    I would be interested to know what plastic is used.

    I remember the originals ere made of delrin or nylon.
    These plastics are very soft and shock absorbing.

    The warning i was posting was related to the return
    steel spring.
    This spring is under high tension, and durst had published
    a warning, after several people had been severely wounded...

  9. #549

    Join Date
    Sep 2017
    Posts
    112

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Quote Originally Posted by calebarchie View Post
    Hi,

    Is it possible to remove the baseboard arm from the 1840 chassis?

    Bests,
    C
    Nobody knows?
    The Container Lab
    www.thecontainerlab.com/blog

  10. #550
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    18,338

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    The manufacturer got the arm onto the lower column, so there has to be a way to get it off. It looks like the easiest way would be to removed the foot first, then slide the whole table mechanism off it. That's just a hunch. I'm not going to be the guinea pig to try it. But what is the point? What are you trying to accomplish? Replace a damaged arm, or turn the enlarger into a different sort of beast? If you're trying to make a huge print with the enlarger vertically oriented, you're still restricted to the center of lens to front of column distance. What you can do is separate the top column from the lower, and design a strong offset support for the entire upper half to get more forward reach from the lens position, if that is what you have in mind. Contact Glenn Evans at Glennview and see if he has tried it.

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