Hermle balance Wheel adjustment

Discussion in 'Clock Repair' started by Frank Manning, Jul 29, 2013.

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  1. Frank Manning

    Frank Manning Registered User
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    Nov 22, 2005
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    Hi,

    I have a Hermle movement that has the balance wheel escapement and has the vertical coiled spring. The wheel gets a little over a total of 360 degrees motion. I have the adjustment all the way over on the slow side and it is still running a few minutes fast every day. What else can be done to slow it down a bit?

    Thanks, Frank
     
  2. hookster

    hookster Registered User
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    Jan 14, 2011
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    That is, for sure, adequate rotation and suggests that your problem is not with the balance, unless someone messed around with the fork, banking pins or other delicate parts, which has been known to happen.
     
  3. shutterbug

    shutterbug Moderator
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    Is it running in beat? Any chance it might have picked up a magnetic charge? Sometimes the vertical wire running through the balance needs work or replacement - worth a peek. Generally, fast relates to power loss in the train, but typically it's accompanied by poor rotation. Yours sounds healthy enough. If you used a magnetized screw driver near the balance I'd eliminate that first.
     
  4. bangster

    bangster Moderator
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    Open the banking pins a teeny bit. (Now I'll duck and run for cover.)
     
  5. hookster

    hookster Registered User
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    LOL :cyclops:
     
  6. Fred Reiss

    Fred Reiss Registered User
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    I had the opposite problem and it turns out the balance unit may have been gummed up from a prior repairman using oil on it. In your case, a prior repairman may have removed weights on the balance wheel to speed up a sluggish unit. You might be able to see this by carefully examining the outer ring of the balance wheel for any marks, etc. If weight was removed, the Hermle service manual suggests adding weight back to the wheel using weights from a scrap unit or by making your own using taper pins. QUOTE=Frank Manning;797597]Hi,

    I have a Hermle movement that has the balance wheel escapement and has the vertical coiled spring. The wheel gets a little over a total of 360 degrees motion. I have the adjustment all the way over on the slow side and it is still running a few minutes fast every day. What else can be done to slow it down a bit?

    Thanks, Frank[/QUOTE]
     
  7. bangster

    bangster Moderator
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    Attached Files:

  8. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
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    First, make sure it is really the balance wheel that is the cause.
    Loose hands or such might allow the time to move ahead slightly.
    It would be a shame to tinker with the wheel when something else
    was the real issue.
    Tinker Dwight
     
  9. Jay Fortner

    Jay Fortner Registered User

    Feb 5, 2011
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    More like Fred said.
     
  10. harold bain

    harold bain Registered User
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    Nov 4, 2002
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    If I'm reading this one correctly, it's not a floating balance. You might be able to make a correction using the hairspring, if it has any extra to lengthen it. You will then need to set it in beat.
    No weights to play with on these.
     
  11. Jay Fortner

    Jay Fortner Registered User

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    No Harold this statement makes me think we're talking old floater
     
  12. harold bain

    harold bain Registered User
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    Yeah, I suppose vertical would make it the helix spring, rather than a hairspring. Perhaps a few weights have been removed.
     
  13. Frank Manning

    Frank Manning Registered User
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    Nov 22, 2005
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    Hi everyone, and thanks for all the good advice. I did go to the .PDF file and decided to take an unusable floating balance and punch out a few of those little pieces. Then I pressed them into the balance in question. I did find that someone had removed some and not done them as opposing pairs. With that fixed, I am now working on setting the speed once again.

    Thanks again, Frank
     

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