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I agree: perhaps 100º amplitude, but a lot less than 180º. That's definitely not overbanking or rebanking and not likely to be an issue with lubrication. Next steps: Determine whether the train runs freely. Let down the mainspring, then remove the balance and pallet and give the barrel a nudge and check that all the train wheels spin. Assuming they do, pay attention not to how well the wheels spin, but to how they stop. The escape wheel should slow steadily and gradually. If it comes to an abrupt stop there is something wrong on the train, such as one or more pivots lacking end shake. If you're not sure, film it and have the experts here cast their eyes over it. Determine whether the balance oscillates freely. Reinstall the pallet cock (but not the pallet fork itself) and the balance, screwing both down securely. Noting the "at rest" position of the spokes on the balance, use an oiler, or an artist's paintbrush, or a toothpick (or some combination of those ... I tend to use a paintbrush in one hand and a toothpick in the other) carefully turn the balance 180º. When you release, count the full oscillations (where a full oscillation is two beats, one clockwise swing and one anticlockwise swing) until the balance comes to a full stop. If you get much less than 100 full oscillations there is an issue with the balance or its pivots. Take lots of pictures including clear views of the hairspring from the side and top. (NB: For an 18000bph watch like the Zaria 2009, 100 full oscillations is 40s of balance movement.) My best guess based on your video is an issue with the balance. I wouldn't be surprised if you only got 20 oscillations out of it before it stopped. But that's really only a hunch and could be totally wrong. -
I have most of the watch built up and for now and I am just waiting on my Incabloc spring to turn up before I can properly button up the movement. Ive put the dial on so I can have a dry run test fit of all the parts. First job was the shorten the stem. Completely overkill but I used my Deckel S0 which makes short work of the stem and I can put a neat chamfer on the end afterwards using the diamond stone edge: Its a shame all of this is going to be hidden: Whilst the movement is in there the original case clamps I got with the movement are not correct. So I need to swap them out for ones I already have on the way. Currently the movement has a tiny bit of wiggle and it’s because the case clamps cannot be orientated to pull the movement tight against the case. The new ones will fix that. A test fit with my olive Nato strap. I have a few more options on the way so I can decide which one I want to use at the end. Hands are obviously not on yet as I’m waiting to finish up the movement. I also had an issue with the quick set date which was not fully rotating the date wheel. It was working fine then it wasn’t and now it’s working fine again. Something for me to triple check before I put it away in the case. Update: Found the problem with the date quick adjust. The user! Turns out the hands were near the midnight part and therefore part of the date mechanism was engaged. Luckily no damage. -
If I watch the video you posted at 0.25x speed on YouTube, unless it is dropping frames in a perfect visual trick, it looks like the amplitude is only 90 to me. It seems to male one half turn in total while 180 would be a half turn on each swing. Do you have free train movement without the balance and fork installed? A little wind should run the train all the way down with a little bit of recoil. And without the fork installed, does the balance oscillate freely for at least 40sec with a puff of air, or turn it 180 and let go. It should oscillate close to 100 times. -
By HectorLooi · Posted
Do you have a slow motion mode on your camera? Record a 10 second video in slow motion and see if that reveals anything. -
I'm bummed that I could not repeat my success with the Zaria 2009 watch movement. I need advice on this one that has the dreaded ++++ on the timegrapher. It has amplitude of 180, beat error 0.2 ms. Lift angle is 44.3. Initially it didn't want to run for long but I jiggled the beat error regulator and then the other regulator and it kicked into life. But there's something odd about the way it ticks. See video. It looks like it's got a skip. In situations like this what are the steps you would go through to troubleshoot? One thought is overbanking and checking to see if the jewels are lubricated properly. Since I'm new at oiling the jewels would more likely be over-oiled. Thanks for you advice.
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