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AS 1315 issue

rattandsonwatchmakers
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rattandsonwatchmakers WRT Addict

rattandsonwatchmakers

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Posted

I am having a terrible time with an AS 1315...I can not get the rotor to get a full swing between bumper spring...it holds fast at the spring (upper in photo)  closest to the balance..it will not swing down toward ..lower spring in photo...any help would be most appreciated...is it my placement of the rotor?....thanks...

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HSL Distinguished Member

HSL

Posted
Posted

Just by judging from this one photo it´s hard to make any estimations
So just as a start and considering it stopped by the balance bridge I would suggest you take off the Winding mechanism and look at the backside of the swing weight. if it is getting caught in something like the screw holding the balance bridge you should see some scratches on the backside of it.
In general you should do something about the screwheads along the path the weight travels since they seem to have quite a loot metal shavings sticking up, just give them a quick polish so they are nice and flat othervice you might end up with small metal shavings inside the mechanism.

rogart63 Distinguished Member

rogart63

Posted
Posted

It's probably the placement of the weight you haven't got right. Could be tricky to get right.  Haven't worked on a 1315 but have done the same on omega and tissot bumbers. The weight should rest halfway between the springs when not engaged in winding the movement up. 

yankeedog Distinguished Member

yankeedog

Posted
Posted

The pivot could be worn excessively causing the weight to droop, and catch on something. what happens when you hold the watch upside down? or one of the pawls in the ratcheting mechanism might not be releasing.

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    • AndyGSi
      Reusing mainsprings in an automatic and slipping

      By AndyGSi · Posted

      If the weight was worn how does the post look as normally you'd have to replace both. There should be no real resistance at the end and just be able to keep on winding. Did you insert both springs the same and is the idler gear OK.
    • JohnL
      Reusing mainsprings in an automatic and slipping

      By JohnL · Posted

      Assembled and running well, I'm asking after the fact. I'm waiting on a new oscillating weight as this one was worn (they have a reputation for it apparently, no bearings). So I've been winding it by hand, but meeting quite a bit of resistance at the end, more than I think an automatic weight will overcome. It's not quite as sudden as a manual mechanism, but there's very little in it, certainly enough that I would be concerned about breaking something if I continued.
    • mbwatch
      Loose pinion

      By mbwatch · Posted

      Remove the cannon pinion from the dial side first. The "clip" you describe is sort of a metal tab some American companies designed their cannon pinions with in order to make it easier to tighten friction. If that is the problem, the solution is as simple as gently squeezing the tab with tweezers to bend it ever so slightly inward, while supporting the inside of the cannon pinion if possible (it may be harder to support inside since it does not have an open tip as a hollow tube) The cannon pinion should just pull straight off of the arbor on the dial side if you pull it straight up with tweezers. There's no jewel in danger of breaking and the arbor is thick so there isn't much risk of breaking the arbor. But when you are describing that the center wheel's pinion is not turning the arbor, is the pinion firmly attached to the center wheel? If you remove the center wheel and hold onto the rim of the wheel, does the pinion turn independently of the rest of the wheel? It should not.  I'm not sure if this was the case on older Waltham, but the pinion may be threaded onto the center wheel arbor and they are often loose. This was a safety mechanism for a broken mainspring and may just need to be tightened back down. I can't remember for sure, but these might be a reverse (left) thread instead of normal right. And does the entire arbor turn independently of the wheel? Also should not.
    • AndyGSi
      Reusing mainsprings in an automatic and slipping

      By AndyGSi · Posted

      You may get some extra friction on the barrel lid so may not slip as easy but I wouldn't think it's a problem. My suggestion would be to finish the assembly and see how it runs.
    • dnhb
      Loose pinion

      By dnhb · Posted

      I have a Waltham key-wound pocket watch, small seconds: 20640806 on base plate & 640 80 6 on top plate. The pinion shown in the photo of the rear of the top plate - driven by the barrel - is loose & doesn't turn the main (first ?) wheel on the same arbour. The other photo shows the arbour on the dial side which appears to have a clip of some sort around it. I'd be grateful for advice as to how to proceed to rectify this problem.
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