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As recommended, tests in vertical positions is needed (main positions are crown down and "12" down, but better all 4 positions).
Movement is Ebauches SA cal. 9000.
Bph = 18000
It is controlled by a mechanical contact that can be an issue, too.
Can you post a picture of that hairspring?
my files say 6.86 mm - they were all 48.1 where I made new staffs, but should be the same as 48.
My Lorch lathes that I use for threading:
Most time I use the green one, mainly for repairing damaged threads on cases or...
All very weird.
The normal barrel/spring allow 6-7 turns. Your 12 turns means an extremely thin spring and unusual train.
Often the Malteser cross...
As I understand, they are for decorative work, applying the last polished finish, not for heavy cutting.
I have a diamont cutter from India (they...
At least you can use them on brass, gold etc. only, never steel!
Original battery is 4.5 V.
You can replace by 3x1.5V AA battery holder.
The tool was intended to re-grind conical pivots of alarm clocks etc.
Not very useful, as these staffs often were surface hardened only.
exactly as you do, with an oscilloscope.
yes, it is of interest, thank you!
What attracted my attention:
1. Closing time of the contact is rather long, most electric clocks show...
I don't know this case, but doubt that an o-ring is right here. Looks like a flat pvc gasket is needed.
what I meant is, you can use the 1 Hz that drives the stepping motor instead of the 4.29 MHz. Of course test equipment is needed in both...
I use a timometer 4000.
But also the divided 1 Hz noise or magnetic pulse can be used as a test signal.
Why does this remind me of post #22? :)
afaik your quartz has a much better temperature performance than 32k tuning fork ones.
You already mentioned it, 4.19M needs more base...
Looking at your pictures:
- the Timegrapher shows a fast watch, not slow
- your regulator is in "fast" position
What thickness has your new...
I can imagine that both hardened and soft steel were used, who knows. Your hint to secret keeping watchmakers is very valid.
Thanks for your reply.
So I will take my box with Glashutte balances made by Kohl and brake a few rims ;)
Just kidding, but will keep it in mind....