Jump to content

Strange behavior in rete

szbalogh
 Share

Recommended Posts

szbalogh Super WRT Addict

szbalogh

Posted
Posted

This is my chinese GMT Matster homage watch wearing it all day long now for 3-4 months. Inside is a DG2813 with nonadjustable 24h hand and date complications. Serviced myself, which does not men it is properly done :) Moreover, it has built-in autowinding mechanism which means i have to align 5 pinions properly at the same time. So, it was tricky putting it together. Also broke one of the icabloc springs which i replaced with a different shaped one.

The problem is that the watch is keeping excellent time for 3-4 weeks and then comes a big loss in the rate. Then i adjust the hairspring preload. This happened 3-4 times as i remember. Last week it made -2,5 s/d in average, deviation was ~15 s/d. Now today it fell down to -80 - -100 s/d. What can do such sudden jumps in the rate? Watch seems healthy.

GMT.jpg

Link to comment
Share on other sites
szbalogh Super WRT Addict

szbalogh

Posted
  • Author
Posted
7 minutes ago, clockboy said:

Its a strange one as the amplitude is good. When you fitted the shock spring did you check it is secure i.e. holding the cap jewel in all positions. 

How can i check the cap jewel? It was ok as i remember. 

But it seems that it is more stable now in the different positions. 

 

Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted
1 hour ago, szbalogh said:

Then i adjust the hairspring preload. This happened 3-4 times as i remember. Last week it made -2,5 s/d in average, deviation was ~15 s/d. Now today it fell down to -80 - -100 s/d.

You adjusted what? There is no preload in the airspring. If the rate changes that means the effective hairspring length has changed. 

  • Like 1
Link to comment
Share on other sites
szbalogh Super WRT Addict

szbalogh

Posted
  • Author
Posted
29 minutes ago, jdm said:

You adjusted what? There is no preload in the airspring. If the rate changes that means the effective hairspring length has changed. 

Ah sorry, not perfect in english, google suggested me "preload" :biggrin: I wanted to say "effective hairspring length". 

The regulator is hard to move, i am sure it couldnt not move. 

Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted (edited)
12 minutes ago, szbalogh said:

The regulator is hard to move, i am sure it couldnt not move. 

It must move, otherwise the rate can't be regulated. Also, if it has an etachron style pin, that is used for regulation and adjustment also.

Edited by jdm
  • Like 1
Link to comment
Share on other sites
szbalogh Super WRT Addict

szbalogh

Posted
  • Author
Posted
4 minutes ago, jdm said:

It must move, otherwise the rate can't be adjusted. Also, if it has am etachron style pin, that is used for regulation and adjustment also.

No etachron pin, simple as possible movement. ?i=http%3A%2F%2Fwww.ofrei.com%2Fimages%2

Meanwhile made more measurements and now it has simply no deviation in rate in the different positions. Day before yesterday i had this report:

gmt2.jpg

It seems that the jewel or the bridge was moved indeed. Maybe the balance was not touching the cap jewels with both ends. 

Assembled the measuring system this week and now i see strange things :)

Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • noirrac1j
      Rolex 2235 escape wheel jewel setting replacement

      By noirrac1j · Posted

      Hell0 @nevenbekriev. Thank you for your advice. I have removed the old setting using my staking set--I will keep the KIF spring, since it is still good.  I am awaiting the replacement setting, and will update when I do that. In the mean time, I looked at the escape wheel and it looks ok. What do you think?    
    • Hawaiikook808
      Seitz Tool - Help determine if Seitz or not

      By Hawaiikook808 · Posted

      Aloha All, I recently bought this Seitz tool on eBay, but it is missing some pushers reamers.  I ended up ordering new parts for those that were missing before I received the actual Seitz tool (bad idea).   Upon inspecting the pushers/bits, I noticed 23 of the 56 provided with the set had no numbers. Further inspection revealed a huge difference in the quality of those unnumbered.  Do all Seitz pushers/bits have a number on them?  I'm pretty sure that 33 of the 56 I received are cheap Chinese knockoffs.  The worst part is that I ordered $80 of parts to replace the missing pushers/bits, and now I'm looking to return the tool. I'm not crazy, right? If these are Seitz parts, they should all be numbered, correct? The first two pictures are the Seitz (numbered), and the other pictures are the suspect parts.  Will I even be able to get a refund?  Thanks, Frank     
    • luiazazrambo
      WWW Eterna sucked me in.

      By luiazazrambo · Posted

      It was £10 + min fee, total £16, could not leave it there. Its a Stanton A.D.2. http://stanton-instruments.co.uk/
    • Geotex
      Generic screws for unknown movements

      By Geotex · Posted

      Chief- The picture below shows the three parts from the dial side that are most useful to "fingerprint" a movement in conjunction with the diameter of the movement.  That's why forum participants are always asking for dial side photos in posts asking for identification.  As far as the setting lever screw, it actually sits loose in the main plate. The threads engage the setting lever below, and the elongated stem above the shoulder sticks through a hole in one of the bridge plates so that it's held captive if unscrewed all the way.  So you may be fine as far as that goes. 
    • Chief
      Generic screws for unknown movements

      By Chief · Posted

      So I found what I believe is the setting lever screw! Am I right in thinking the screw next to the click is the correct one for the setting lever? However if it is, it doesn't fit in the hole which I believe is for it! I can get the lever to sit nicely on the stem and line up with a hole, but the screw only goes as far as the shoulder and stops. It's as though the hole is too small! The dial side has been disassembled by the way, the other wheels are in my tray
×
×
  • Create New...