ausimax
Timekeeper
Kogan, Qld, Australia
Posts: 937 
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Post by ausimax on Dec 25, 2015 21:45:00 GMT -8
Hi, It is now Boxing Day here and I hope you all have had a very merry and restful Xmas. We spent a quiet but enjoyable day with a couple of friends, all our kids are 1000 km away and were spending Xmas with their kids & grand kids. I must have been a good boy over the last year as Santa brought me a Timegrapher and some other handy tools. Today I have had a chance to try it out on a couple of watches I restored quite some time ago, I am not sure how you are supposed to equate the readings from different positions, what I did was record all the readings and average them, as it seemed to me that to get all the positional readings equal would be an endless quest. Following a couple of images with the recordings, first columns are as was and second are after adjustment in the dial down position.
Your thoughts and ideas of how to use the Timegrapher welcome.
Max |
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Dec 26, 2015 1:33:52 GMT -8
Long story short, you want to aim for a good mean average over multiple positions. I usually do them over 3 (dial up, dial down, crown down) as most of these movements are not chronometer grade anyway. So, you want to aim for a beat error of 0 to 0.3 and probably a very slight gain as when it's not being worn it's likely to lose a little. 6309 should have an amplitude of around 230 degrees, so your's needs a rebuild. The 7S should be around 250-260, so it's due in 6-12 months. Dial up/dial down will give you the highest readings, crown down will be lower (it's all in the g's) 7S will be more consistent than a 63 because the smaller balance wheel recovers faster than the huge one on the 63. The other thing to look at is the graph. That will tell you a lot about the movement's health and any issues. Read this, read it again, experiment a bit, then read it again. It tells you pretty much everything you need to know about interpreting the results - www.witschi.com/assets/files/sheets/Witschi%20Training%20Course.pdf |
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ausimax
Timekeeper
Kogan, Qld, Australia
Posts: 937
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Post by ausimax on Dec 26, 2015 2:59:16 GMT -8
Long story short, you want to aim for a good mean average over multiple positions. I usually do them over 3 (dial up, dial down, crown down) as most of these movements are not chronometer grade anyway. So, you want to aim for a beat error of 0 to 0.3 and probably a very slight gain as when it's not being worn it's likely to lose a little. 6309 should have an amplitude of around 230 degrees, so your's needs a rebuild. The 7S should be around 250-260, so it's due in 6-12 months. Dial up/dial down will give you the highest readings, crown down will be lower (it's all in the g's) 7S will be more consistent than a 63 because the smaller balance wheel recovers faster than the huge one on the 63. The other thing to look at is the graph. That will tell you a lot about the movement's health and any issues. Read this, read it again, experiment a bit, then read it again. It tells you pretty much everything you need to know about interpreting the results - www.witschi.com/assets/files/sheets/Witschi%20Training%20Course.pdfThanks Adrian that was the sort of info I was after, was just flying blind before. Max |
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,686
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Post by HiBeat on Dec 26, 2015 13:14:15 GMT -8
Max I love how yours interfaces with the PC. Is that the Lepsi ?
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ausimax
Timekeeper
Kogan, Qld, Australia
Posts: 937
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Post by ausimax on Dec 26, 2015 21:04:09 GMT -8
Max I love how yours interfaces with the PC. Is that the Lepsi ? No it is the same as yours, that is just a spreadsheet I set up to enter the results from all the positions and average them, then I can save the results to remember what watch did what. I struck the same problem you did first watch I tried was a 7625 couldn't find the lift angle for it on any site got a few guesses, had almost as much trouble trying to find it for a 7S36. These things look like a lot of fun once I know how to read the results, did you check out the link that Adrian posted? It is quite useful and should make the job easier, some of the info doesn't apply to our machines as they don't show the sound profile. I recently made up a system to record the beat in Audacity and analyse in Delph software that could be useful also now I can see how to use it. Have fun, Good old Santa!!!!!!!!!!! Max |
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Dec 26, 2015 23:06:30 GMT -8
Lift Angles - 52xx - 52 61xx - 54.5 4006 - 58.4 70xx - 53 7S etc - 53 56xx - 56 Yeah unfortunately we can't use the sound info, however, reading that section gives you some insight on why the movement would make certain sounds or beats. The info there on the graph and what the lines mean is pure gold. I read over that in bed for about a month until I understood all of it. I can now look at a timegrapher readout and immediately tell you what's wrong with the movement. After a while, just by listening to the watch against your ear you know if it needs service as well. Max I love how yours interfaces with the PC. Is that the Lepsi ? No it is the same as yours, that is just a spreadsheet I set up to enter the results from all the positions and average them, then I can save the results to remember what watch did what. I struck the same problem you did first watch I tried was a 7625 couldn't find the lift angle for it on any site got a few guesses, had almost as much trouble trying to find it for a 7S36. These things look like a lot of fun once I know how to read the results, did you check out the link that Adrian posted? It is quite useful and should make the job easier, some of the info doesn't apply to our machines as they don't show the sound profile. I recently made up a system to record the beat in Audacity and analyse in Delph software that could be useful also now I can see how to use it. Have fun, Good old Santa!!!!!!!!!!! Max |
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