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jdm

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Everything posted by jdm

  1. Found a good thread on WUS - acidic comments by a certain anti-social character aside. https://forums.watchuseek.com/f6/tissot-powermatic-80-problems-3036370.html Note at some point "benzine", that is, petroleum ether, is written as "benzene", which is a typical mistake of English speakers.
  2. More to this. The C07, as the OP picture shows, has plastic (better said, synthetic material) escapement. Now, despite the pattern seems to be OK, it possible I think, that the machine can't compute amplitude correctly. 160° seems way too low indeed. Was that before disassembly?
  3. Why always the suggestion of using something that contains oils, perfume, and other contaminants, especially on an high precision modern mov't that's not what you want. For an hydrocarbon type of cleaner, petroleum ether should be used. Then regarding plastic parts, even if they are resistant to most chemicals, aggressive cleaning is rarely needed. Personally I would use Isopropylic alchool (IPA). I could not find online a technical sheet for the C07 (Powermatic 80). Probably so far the Swiss have been able to limit distributions to authorized centers. However since the mov't is a straight derivative of the 2824-2, I would use that as start reference, and attached it here. _C_T_CT_2824-2_FDE_481688_24.pdf
  4. That assumes the OP has a watchmaker's lathe, and the ability of using it. I think if that was the case he wouldn't have asked in first place.
  5. Looks like the mov't wi need to be taken apart for inspection, cleaning and lubrication. A good occasion for a complete service also.
  6. As always Mark does a stellar job in explaining and showing how things works, so let's analyze what he says: 7:20 If the watch has a second hand you can observe this. He's referring to a non-hacking mechanism, like many Seiko or older Swiss, or even a vintage with no seconds. I have explained above twice that hacking mov't, like the 2824-2 that you have recently presented, "hacks" and stop the train when setting time. 7:30 this is not a good thing for any watch mov't I'll have to disagree on the word any in this sentence, I think he used it to make a generic safe statement. Particularly I'd be interested in his opinion of the most practical use of setting time backward, after correcting a slightly fast watch: setting for DST end: Set time backward one hour (or 30 min in some places) --or-- Set time forward 23 hours Where applicable, quick-set date/day. If that took longer, adjust time again. He's welcome to comment .. in his forum
  7. I gave a better look at the picture, this type of bracelet uses a thin shaped plate to join links, not a pin, and that is what broke. So you would have to push it out first (not easy as if not part of adjusting links is not meant to be removed), and then make a new one using maybe a jeweler piercing saw and files, or you can get another from another bracelet, or try what oldhippy said, I did a repair like that once. Finally a note about tools, all I meant to say is that they have to work for the job, not that they have to come from a given country. Prejudice in this sense is useless, especially when aspersed without specific reason or contribution.
  8. To reiterate.. when setting time the minute wheel is turning only on mechanical non hacking mov'ts or quartz where stem does not cut battery. That leaves only the calendar to be affected but on good designs is protected as shown above.
  9. Well I was meaning physically opening it. Here if they doubt the correctness of the declaration you are contacted for clarification, otherwise you pay directly to the postman or courier.
  10. What was damaged exactly, and why? Excluding non-hacking, reversing Seiko and Vostok calendars ? Minute wheel turns one revolution per minute pretty slow I'd say. If the cannon pinion is turned in that direction, or against it will make no difference. Friction there is mainly affected by the speed the crown is turned to set time, the good advice is to do that slowly, not scare people from setting back time when DST change.
  11. Broken pin. Isn't that easy to do a good repair. You need to push out the stumps from the link and arrange a proper replacement link. You need precise tools and a small press or vice, dies etc.
  12. Wow that's a lot compared to my proverbial inefficient country, customs is cleared the same day. For my curiosity, do they inspect many packages? Let's just hope that reason prevails and pray for a smooth landing.
  13. Being here we are watch repairers, or at least aspire to become.And we need to understand well what we work on. So when faced with canned statements like that be prepared to ask or research: why?
  14. Up to you of course, on my reasonable order of priority watch repair tools a $15 digital calipers come much before than multi-hundreds winder set.
  15. No, as mentioned the link I gave is for generic parts only. Give it a look anyway, it's interesting as well the website of Haas, the maker of the machinery they use. Watch case manufacturing is a different industry segment, I gave you an idea about the cost above, it can be less for a simple design and that include detailed CAD, that for production work has to be much, much more detailed than what a "sketch 3D" application can produce.
  16. That's a myth. Knowing how the setting works we that doesn't care for the direction you move except for the calendar (when there's one), going backward around midnight. In this case, on the Seiko withe -and I'm sure on most other modern mov'ts- there is a design protection in the form of the day/date fingers being flexible (entire wheel is plastic), and shaped so to retract when acting (backward) the date spring. The same protection intervenes on another classic don't-do-that: quick setting date around midnight. See in my modest video And, a couple of curious features of the effects of setting time counter-clockwise on the non-hacking Seiko mov't. (of course if the mov'm hacks, the train is stopped when setting time no matter the direction). First, it can be used as poor man's hacking to align the minute and seconds hand. Winding must be quite down for this to work. Second, on some units only, if you insist enough with setting backward in short pulses, you could be able to get the entire train moving in reverse for something like 15, 20 seconds, maybe more. I suppose it has to do with the tightness of the cannon pinion and the micro geometry of the escapement.
  17. One really can't do watch work without vernier calipers, and is some case a micrometer.
  18. I don't have the set but two identical arbors make no sense to me. Just measure them all and post, there should be a meaningful progression in their sizes.
  19. In fact was wondering how come you had replied to me at such an early time! Staying up all night is out of question for me, even when partying! I have a business meeting after a red eye flight next month and already feel the pain.
  20. That much for Swiss perfection etc. Seuggest that you take good pictures with the measuring instrument and complain to seller and Bergeon at the same time.
  21. Of course. Generic CNC machining , e.g. From Shenzen PRC www.sino-mfg.com However for a watch case you need a manufacturer that specialize in that. I have various contacts, assume around $1,000 to make prototypes. Their goal however is to produce in some quantity, not one-offs.
  22. I'm anti Brexit but must say there will be no consequences for EU customers buying from the UK. Even if there will be no customs union, UK sellers will stop charging 20% VAT on EU orders, and one may (or may not, depending on invoice value) have to pay it at a slightly different rate, plus service fees, when it arrives in EU destination country.
  23. I'm definitely in for the stamping set To correspond this nice gesture I'm also posting few humble items I have to give away.
  24. Same subject as per thread below and few more. My experience with Cousins is also positive.
  25. Yes, when I say that Swiss tool prices are robbery when it's the same product possibly made by same factories, there is always someone coming back with the "quality tools" mantra, without specifying supporting reasons. That being said, of course the Swiss make many tools and machines that nobody else makes, or not to the same standard. There is also a more practical 3 arms type for something more https://www.aliexpress.com/item/-/33035432640.html
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