Jump to content

No adjustment left on beat corrector


Recommended Posts

I'm wanting to regulate this movement. Usually I'd start with the beat corrector and when that's 0 or 0.1 max I'd move onto playing around with the rate in a few positions. However I've been stopped in my tracks because the beat error here is 0.5 and there is no more adjustment left. 

Just wondering what my next move should be? 

20190607_190146.jpg

Link to comment
Share on other sites

This is the time when you need to adjust the hairspring. It’s the next level up in complexity as you have to remove it, put the wheel on with the pin in the middle of the way and mark the spot on the wheel where the pin is located while the impulse jewel is right between the safety banks.

Thought to describe without pics! Maybe others will have images or a shortcut?

Good luck!




Sent from my iPhone using Tapatalk

  • Like 1
Link to comment
Share on other sites

0.5ms beat error is a perfectly acceptable value and will not influence accuracy. 

If you don't believe that, regulate to the best positions average, wear the watch few days and let us know. 

Unless you are interested in learning how the hairspring collett is adjusted, which is a pretty delicate task, I would not recommend you try that on a balance cock with movable stud arm. 

Edited by jdm
  • Like 4
Link to comment
Share on other sites

15 hours ago, AP1875 said:

20190607_190146.jpg

There is however an issue with the pattern above. If the jump down repeats that's not a good sign, check if it  happens with a fixed period?
For a general reference I've the attached a brief guide. Only the first few pages are of interest, much better texts must exist.

 

Witschi Training Course.pdf

Link to comment
Share on other sites

37 minutes ago, jdm said:

There is however an issue with the pattern above. If the jump down repeats that's not a good sign, check if it  happens with a fixed period?
For a general reference I've the attached a brief guide. Only the first few pages are of interest, much better texts must exist.

 

Witschi Training Course.pdf 4.65 MB · 0 downloads

Thanks for sharing your knowledge. I uploaded a video. Probably the best way for me to show the pattern. What are your thoughts? Taking more notice of the pattern rather than the figures for beat error it doesnt look quite right.

I've checked all the parts when I took it apart, there isnt any damage to the escapement. Any ideas how to trace the fault and rectify it? 

I will download the manual now thanks. 

 

Link to comment
Share on other sites

32 minutes ago, AP1875 said:

Probably the best way for me to show the pattern. What are your thoughts?

All is good with your watch. I'm so embarrassed, I posted with the brain disconnected, that is just the progress gap in your picture.

  • Like 2
Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • that band is old as stated, there is a kit that pops up from time to time on selling sites for the repair of these type bands, some of this type are adjustable on a few links, one adjustable type allows you to align the round opening in the expansion slit [like yours] with the rivet to separate, but if yours won't come out then the rivet head is too big and will have to be done with some rivet removal and replacement, I suppose if you could make/optain the correct rivets that one could alter the said band, the tops/caps do lift off after raising the tabs....  
    • This is a watch from a friend who sent it to a neighborhood watchmaker for a battery change. It came back with the watch stem in a ziplock bag and the dial skewed 20°. The watchmaker told him that the stem was faulty and the watch cannot be repaired. I opened up the watch and found that one dial foot was broken off and still stuck in the movement, while the other was bent until it was flat against the dial. The stem could be inserted but it couldn't be pulled out to quickset and time adjusting positions. I did a full disassemble, cleaned and oiled the movement. But when it put in the battery, the second hand runs super fast. Like it gains 30 mins every hour. Any advice on fixing this problem? TIA.
    • I determined that the balance staff is rotating, not the roller table, so my second attempt at riveting was unsuccessful. I have ordered a new balance staff and will take measurements when it arrives. The balance staff i originally ordered (and now reordered) was specified as: Replacement balance staff: (A. Schild Caliber 984 1002 1021 1124 Original Balance Staff Part 723) so it should be correct. Measurements: (see pic below for terminology) xxxyy is a place holder until the new balance staff arrives. Lower pivot: Old - .08 mm New - xxxyy Lower pivot to balance seat: Old - 1.53 mm New - xxxyy Roller shoulder: Old - .42 mm New - xxxyy Hub: Old - xxxyy New - xxxyy Balance shoulder: Old - .86 mm New - xxxyy Collet shoulder: Old - .56 mm New - xxxyy Upper pivot: Old - broken New - xxxyy
    • Hello and welcome from Leeds.  We're here to help. 
    • I was just about to adk that, probably they have unnecessary waiting lists to make their watches appear more exclusive than they actually are.
×
×
  • Create New...