Jump to content

Watch regulation...

Learning

By Learning
in Watch Repairs Help & Advice

 Share

Recommended Posts

Learning New Member

Learning

Posted
Posted

While attempting to regulate a Seiko nh35a movement I found that when I adjusted the regulating lever to get a plus seconds per day reading it also changed the beat error reading on my timegrapher. I thought the two were independent of one another. Am I doing something wrong? Thanks for any thoughts or help on this problem I am having...

jdm Distinguished Member

jdm

Posted
Posted
18 minutes ago, Learning said:

I thought the two were independent of one another. 

They are mostly independent but since the regulator arm rotates in contact with the end stud arm can transmit some motion to the latter. Of course when you adjust the end stud the timing changes because both the total and effective hairspring length changes. Just gain some experience in making small, controlled movements to reach the best result.

After you have good timekeeping dial down, you will need to observe the positional error, especially in crown down position, if above 30 s/day some correction to the hairspring would be be necessary (rotating the etachron element often has no effect), that is to all effect adjustment and not simple regulation anymore, it's a difficult job for a beginner, and often ends in disaster, so be advised.

JohnC WRT Addict

JohnC

Posted
Posted

They are independent, IF the hairspring is not riding one of the regulator pins. If the hairspring "wants" to naturally sit outside one of the pins, then moving the regulator forces the hairspring inward or outward. This rotates the equilibrium (power-off) position of the impulse jewel, changing the beat error. When the hairspring is shaped correctly, it will pass between the regulator pins but will not be pulled in any direction by them, regardless of the position of the regulator.

 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Michael20
      French drum novice

      By Michael20 · Posted

      Regarding the spring winders, I made my own and used copper pipe reducers as the tubes to retain the spring. You will need to cut out a section for the end of the spring to protrude but if you watch one of the many videos on this subject that will make sense. You can find a selection of sizes on Ebay for very little cost. I'll attach a pic showing one of mine.  Good luck!
    • JohnR725
      Omega sweep second pinion friction spring - correct tension IS important

      By JohnR725 · Posted

      There were things bothering me about this discussion that took me a while to figure out the problem. In the image below it appears to be the spring may be pushing up? Normally when Omega has a spring pushing up the pinion has a pivot with a bridge to hold it in place so in other words the spring can push on something that stationary as opposed to this which appears to be floating? To understand the problem with the above image we need another image of side view which I have below. In my image down below on the left-hand side it agrees with the image up above. But the only problem is the left-hand side is defective and the right-hand side image is the way it's supposed to look. Then Omega if you can access the right documents does explain how and why this problem occurs. With the pinion floating around it might be assumed that you support it when putting on all the hands but you do not because as noted below if you do this small bush on the pinion will relocate out of position exactly what we see in the image up above.   Then Omega does not mention this but there is a possibility of also damaging the pinion and causing the bush to move to where it's not supposed to be when removing the hands.   
    • LittleWatchShop
      Regulating is too touchy

      By LittleWatchShop · Posted

      Maybe show us 1) the watch, 2) timegrapher readings in DU, DD, PU, and PD.
    • Louis1969
      Regulating is too touchy

      By Louis1969 · Posted

      The timegrapher displays significant beat error variations in the dial-up position. When the watch is lying flat (face up), the beat error is much higher than in other positions. Beat error readings are inconsistent, with especially large gaps in the face-up position.  Please help !  
    • Geotex
      Informational universe.

      By Geotex · Posted

      Looks like an open-access journal that runs as a glorified pre-print server with no true peer review, so it’s not easy to judge the veracity of the conclusions.
×
×
  • Create New...