Comments on: Vibrograf B200 Mechanical Watch Calibrator Repair

By: Guido Velásquez

Guido Velásquez — Tue, 16 Nov 2021 22:25:35 +0000

Hello, brilliant job. I have an Elma Mini Test machine that stopped working. However, my knowledge of electronics is very limited. Furthermore, in our environment, it is very difficult to access spare parts. I have it in storage for when the opportunity arises. Maybe you want to help me.

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By: Nigel

Nigel — Sat, 08 May 2021 09:06:40 +0000

Very enjoyable read, thank you for sharing & the detailed photos. Once explained, we can all see the original problem but as technicians, I'm sure we've all had many times when we've spent hours chasing a friend/customer-induced 'fault', rather than a real equipment fault!
If you get to work on this machine again, perhaps some labels or different colour varnish dots could be applied to each board & the the mainboard, to assist your friend with future board placement & orientation?

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By: Andrea Del Corso

Andrea Del Corso — Sun, 20 Sep 2020 13:09:31 +0000

Eccellente lavoro,come al solito,bravo Albert,e,grazie per la condivisione.
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Excellent work, as usual, good Albert, and thanks for sharing.

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By: Parasuraman S

Parasuraman S — Sun, 13 Sep 2020 16:26:28 +0000

In reply to Albert van Bemmelen.

No, not at all! It is a very interesting reading! Articles such as yours should be descriptive and lengthy enough not to miss anything! You are sharing your knowledge, which is always a flow. It should be allowed to flow out easily! Well done!

I opted to make my article compact for saving time and efforts. But at times, they are lengthy as the case may be!

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 12 Sep 2020 14:17:12 +0000

Thanks Mario! But of course I never would have had the chance to reverse-engineer this special device if my friend wouldn't have destroyed his important Vibragraf B200 unintendidly (twice).

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 12 Sep 2020 14:08:49 +0000

In reply to Parasuraman S.

Thanks Parasuraman! I however do feel a bit ashamed for making yet another very long space taking article while you are recently doing your best to make your articles more compact. I hope I am not the reason for that.

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 12 Sep 2020 13:59:52 +0000

In reply to Yogesh Panchal.

You are right Yogesh! The old pcb boards indeed look like they were produced yesterday. Why they probably will still work after another 50 years or so.

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By: Mario Di Stefano

Mario Di Stefano — Sat, 12 Sep 2020 09:44:42 +0000

Fantastic job!!!
Also the reverse - engineering job you did, if nothing less than SUPERB!!!
Thanks for sharing!

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By: Parasuraman S

Parasuraman S — Sat, 12 Sep 2020 09:44:15 +0000

Voosh! What can I say? I am dumbfounded! Bowled down! What an amazing and unparalleled way of trouble shooting and solving! Oh My God! That too diagram manuscripts! Vow! I feel exhausted by reading the article itself! Excellent job there! Many thanks for sharing this sweating service!

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By: Yogesh Panchal

Yogesh Panchal — Sat, 12 Sep 2020 06:21:36 +0000

Excellent! Repair Albert,

Good Home work before proceeding the work by marking components on the Paper and understanding the circuit on the paper before start the work when you do not have Schematics.

Fabulous condition of the PCB after 45 years.

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