Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Beseler 45MCRX motor struggles when raising

  1. #1

    Beseler 45MCRX motor struggles when raising

    When raising the Beseler 45MCRX, the motor starts to struggle as it gets to about halfway - requires a push. It looked like it had been in a barn for a few years.

    I cleaned it up, lubriplate on the geared rails, new motor belt, cleaned motor commutator bars, one brush is a bit shorter than the other, but length on both seems adequate. Rollers on carriage bars rotate with ease.
    With the carriage out of the frame, when I turn the manual elevation control, it turns easier in one direction than the other. I opened the gearbox, cleaned out the old grease - gears look great - no nicks, metal shavings, etc. There are roll pins that aren't fully in - protrude just a little - not sure if that is normal or if they should be fully 'seated' - but I can't detect any slop in the mechanism.

    Not sure what to check - just had time to fool with it to see if it could be improved.

  2. #2
    Gary Beasley's Avatar
    Join Date
    Apr 2007
    Location
    Marietta Ga. East Cobb.
    Posts
    624

    Re: Beseler 45MCRX motor struggles when raising

    The counterbalance spring may be showing its age. I dont know if its possible to retension it to provide more lift. Until you can find a solution give the carriage a little lift with your hand while raising it to avoid overstraining the motor.

  3. #3

    Join Date
    May 2015
    Location
    SooooCal/LA USA
    Posts
    2,077

    Re: Beseler 45MCRX motor struggles when raising

    First, take a tape measure and measure the height from each side of neg stage to baseboard... They should be exactly the same... If not, the gear shaft on the carrage/column in rear can jump a gear tooth on one side and cause the head assy to drag badly, as well as badly misalign...

    Check for this first...

    Steve K

  4. #4

    Join Date
    Dec 2014
    Location
    Iowa City, Iowa
    Posts
    1,173

    Re: Beseler 45MCRX motor struggles when raising

    Alignment.

  5. #5

    Join Date
    Dec 2018
    Posts
    344

    Re: Beseler 45MCRX motor struggles when raising

    I'm with Steve K on this.

  6. #6

    Join Date
    Sep 1998
    Location
    Oregon now (formerly Austria)
    Posts
    2,652

    Re: Beseler 45MCRX motor struggles when raising

    There is a tensioning spring located in one of the chrome crossbars. It can be tightened. However, it is tricky and I've never tried it. Make sure you read up on the proper procedure before attempting it, since I understand that it is easy to do it incorrectly and accidentally release the spring tension completely all at once, which can result in damage and/or injury. Someone will likely chime in here with the proper method.

    FWIW, I've adapted a 5x7 Chromega head to one of my Beseler 45Ms, which makes the moving part quite a bit heavier than with my earlier cold-light head or the condenser head. I just help the motor out by lifting with my hand when raising the head, which seems to work just fine.

    Do check whether the gears are aligned on the toothed rails first; this is a common problem with these enlargers and easy to remedy.

    Best,

    Doremus

  7. #7

    Join Date
    Jun 2013
    Posts
    117

    Re: Beseler 45MCRX motor struggles when raising

    the gear shaft on the carrage/column in rear can jump a gear tooth on one side and cause the head assy to drag badly
    +1

  8. #8
    Eric Woodbury
    Join Date
    Dec 2003
    Posts
    1,448

    Re: Beseler 45MCRX motor struggles when raising

    I have an old 45MX (maybe other letters) that I bought used in about 1980. It seemed old then, but the motor is still strong. Makes me think that your carriage could be off or you missed a lube point in the motor. I wouldn't mess with the springs unless you are absolutely sure. If the head you have is extra heavy and it goes down better than up, add a counterbalance weight, pulley, rope, and gravity.

  9. #9

    Join Date
    Dec 2014
    Location
    Iowa City, Iowa
    Posts
    1,173

    Re: Beseler 45MCRX motor struggles when raising

    It's easy to get a tooth or two off especially if someone has had it apart. If all you have is the condenser head (which isn't super light) it should move up smooth. If you have the 1st generation Dichroic head with the hose and cooling blower, there's a spring assist mounted on the transformer that hooks to the top off the enlarger frame. This gives it a boost. These heads date to the 70's and were great heads.
    If you have an antique, Beseler started with the MCRX, M motor, C color filter drawer under condensers, R Resistrol, X for, Extra something. These started out in the 1950's, one clue is if the cord set and plug in for the switch ARE NOT 3 PRONG, i.e. not grounded. You have a 60 to 70 year old enlarger. I'm 63, and after a hard days work I climb stairs pretty slow.
    If it's a blue enlarger it was made during the hip, and groovy phase Beseler went through in the early 70's.
    Most likely is tired and needs adjustment and a little help up the stairs. . If it has the arm to allow for horizontal projection. Well you mount it on rails and move it to and fro from a wall mounted easel. Fred Astaire did that with one of these enlargers in the 1957 movie Funny Face, great flick, Audrey Hepburn.

  10. #10
    Eric Woodbury
    Join Date
    Dec 2003
    Posts
    1,448

    Re: Beseler 45MCRX motor struggles when raising

    I heard the 'X' in the part number was for the 'X' shape supports on the main chassis.

Similar Threads

  1. Beseler 45MCRX questions
    By jesse1996 in forum Darkroom: Film, Processing & Printing
    Replies: 4
    Last Post: 4-Aug-2016, 22:45
  2. beseler 45mcrx
    By Albert Lombardi in forum Darkroom: Equipment
    Replies: 17
    Last Post: 3-Mar-2011, 23:13
  3. Beseler 45MCRX
    By keith_6105 in forum Darkroom: Equipment
    Replies: 7
    Last Post: 30-Nov-2005, 20:34
  4. Beseler 45MCRX
    By Debbie B in forum Darkroom: Equipment
    Replies: 3
    Last Post: 14-Feb-2005, 09:49

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •