Should be a sticky
Last edited by 1afc; January 13th, 2017 at 05:21.
Many thanks to the developers and contributors for great TG software
Last edited by EATT_VN; January 16th, 2017 at 02:52.
First of all I want to congratulate you on this brilliant software, it is so simple, and easy to use.
I would like to know what kind of calibration is this in the upper right corner?
Also, you said something about samplerate, would it be better to use 192khz instead of 44.1khz?
Thanks for this awesome software, seems to work nicely with my Samson Go Mic microphone (the sec/day matches with the average time deviation I measured during 24 hours for one of my watch). I got some question though :
- What are the top indicators in plain language for the layman ? The s/d indicator is simple but what about the others ?
- What is lift angle, how important is it to set it properly and how its value can be obtained ? (my only interested is measuring accuracy in seconds per day)
Thanks in advance :)
A good source to start exploring how to interpret timegrapher data is the Witschi training course, Measuring Technology and Troubleshooting for Watches, the PDF is freely available on the internet.
A lift angle is a fixed value, determined by the design of the movement. All these, the lift angle, the amplitude and the beat error, are explained in the PDF above.
Anyway, a lift angle setting of 52 degrees is a somewhat safe assumption for modern movements, although far from all have a lift angle of 52 degrees. If a movement, for example, has a lift angle of 54.5 degrees, wrongly presetting it to 52 degrees would affect the amplitude reading on a timegrapher.
For the above example (52 instead of the 54.5 degrees), if a timegrapher shows an amplitude of:
- 300 degrees, the real amplitude is 314.6 degrees
- 200 degrees, the real amplitude is 209.6 degrees.
So, an error of roughly 4 to 6 degrees of amplitude for each degree of the lift angle delta.
If you're just interested in the daily rate, the lift angle isn't important. But the amplitude value is one of the most tell-telling indicators of the watch movement's health. The amplitude when fully wound, the difference in amplitude between positions and the difference in amplitude 24h later tell you a lot about the condition your watch is in.
I have packaged TG for Arch Linux. As of today, it is available in AUR:
Unless someone beats me to it, I'll do the same for Fedora and perhaps CentOS (EPEL) in the future.
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