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16
Crazy Timegrapher Results
Absolutely, i cant see that would even work, maybe release a coil or two at best. That rules one thing out, i was going with the hairspring catching or coils touching ( which it still looks like it could be )As suggested visually check the amplitude,it might be a bit more than your tg is telling you. The oscillations in youf first video look strong, strong enough to rebank and push coils together. I had something like this a few months back the coil spacings looked really small and the amplitude was high enough to bring them together. -
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Beginner here :]
Hello there I'm fairly new to the world of watches and I find it quite interesting! I love the idea of fixing and taking things apart -
16
Crazy Timegrapher Results
Well, an off center hairspring collet is not the issue. So, I'm left trying the old mainspring in it. -
16
Crazy Timegrapher Results
Maybe one of the largest understatements I've ever heard.- 1
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Crazy Timegrapher Results
I haven't found the lift angle for the Benrus BA movement. I did find 51 degrees being the lift angle for several other Benrus movements, so I have tried that. Not much of a difference in amplitude reading from 52 degrees, of course. I'll attempt to center up the hairspring collet and tweak the position of the regulating pin and retest. Trying the old mainspring is certainly an option, but it is quite coned. Plating was worn off of the barrel lid, so this wasn't from me removing the mainspring. -
9
Barrel in pocket watch slanted by about 5 degrees, could that contribute to low amplitude/non-running?
The barrel may have been roughed out, then later machined for the lid (for example). That would open the possibility of the lid mating surface not being perfectly concentric with the barrel hole. A lid would be fabricated, fit to the barrel, then the barrel centered up in the lathe, lid fit, and hole bored. They had techniques to center up stuff really well, but it's time consuming so they might cut corners on lower end stuff, or if there was a way to make a certain eccentricity a non-issue. Some books show boring the mounted cap and barrel in the same operation.- 1
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5
Advancing the day with the crown - Seiko 4336
The setting lever is a complete unit with the 3 pointed star gear so isn't available as a separate item. The 5 pointed star is part of the calendar plate so again not available as a separate item. -
16
Crazy Timegrapher Results
What is seen on the first video (by the hairspring breathing) is that the amplitude is really high. The other thing seen is that when expands, the hairspring probably touches the stud. So, what You can do is center the hairspring better as it will stay a little away from the stud. Then, check You amplitude. One way to do it is to put a dot with marker on the balance rim and observe it's movement. The other way is to check if the lift angle for the movement is different from the magical number 52 and insert the correct number in the timegrapher. And if really rebanking happens, then You can return the old spring and check what will happen then. Yes, You can close a little the regulator pin. But it will not solve the problem.- 1
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9
Barrel in pocket watch slanted by about 5 degrees, could that contribute to low amplitude/non-running?
I have to double check the lid. I do remember seeing an index mark on some part of it last night that I didn't expect to see one. I don't remember if it was the lid or not. Why would they have created them where orientation is necessary? Or was it a limitation of the fabrication technology available at the time? Will do. Thank you. Though I should mention that the barrel did not have the mainspring in it when I took the picture. -
16
Crazy Timegrapher Results
I was able to move the problem to the DU position by changing the height of the stud pin in the balance bridge. Initially, I had the stud pin in as far as it would go (I had removed the balance wheel from the cock to clean the pivots). I loosened the stud screw and let it find the position that it wanted to and tightened it back up. The craziness moved to DU. Fiddled with stud position, to get the mainspring to lay flat, but that brought the problem back to DD. I'm not sure what you call this type of regulating pin arrangement. You need a screwdriver to rotate the one side to release the hairspring. There's a little ledge that sticks out from that rotating piece and the hairspring could be rubbing on that. It does look like the regulating pin gap needs to be minimized. I measured the old mainspring at 1.6mm x 0.11mm x 9mm and that is what I ordered. Got it from Cousins, GR4514. Emmy Watch does list mainsprings with slightly different specs. https://www.emmywatch.com/db/movement/benrus--ba/ There does seem to be a bit much gap between the regulator pins. I will try to adjust that. Yes, fully wound. Though, I let it run overnight and checked it this morning and it was still acting bizarrely. It can be intermittent. The timegraph can look more normal, then start going awry. Once awry, though, I haven't seen it go back to normalcy unless I change the position and then go back to DD. That is not always the case, though. -
9
Barrel in pocket watch slanted by about 5 degrees, could that contribute to low amplitude/non-running?
Well, in the fusee barrels You shouldn't put the lid in wrong position as the hole in the barrel where the chain hook goes must be exactly against the cut place in the lid. If not, the chain hook may not get in place. OP, What You should do is to remove the spring from the barrel and assemble it exactly as it looks in the photos. Then grasp the arbor with something and rotate the barrel. This will show if the barrel is not true or the arbor itself is not true. If the barrel rotates true, then the arbor is the reason for the tilting. If the barrel doesn't rotate true, and this is so much that rectifying is needed, then the best option is to make new lid that will compensate for the barrel being not true. If this is to be done, I will give further instructions what to do. -
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5
Advancing the day with the crown - Seiko 4336
Ya sorry you can't tell more from the photo. I have a video of this but I can't upload it here. I also felt like the three point wheel wasn't seated, as I found myself pressing it down with the tweezers all the time. I should probably just poke around and find replacements for both of those gears - pretty cheap if you can find them. I'll double check how everything looks on the other side, but from everything I can tell, the mechanical function of the watch is fine otherwise. Thanks for the reply. -
9
Barrel in pocket watch slanted by about 5 degrees, could that contribute to low amplitude/non-running?
Did you replace the cap in its original orientation? Generally one can expect things to go together and line up regardless, but on old stuff the barrel cap is usually indexed, with a mark or sometimes a "divot" indicating the orientation. If the exterior of the cap is eccentric to the hole, getting it out of orientation can show up as a barrel tilted on its arbor. If there's no indication, the cut in the lid is usually placed in line with the hook in the barrel. I do this even on modern watches and clocks, just because it was how we were taught.
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