Impulse Jewel On Waltham Traveller 16S

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Gents, have a look at this picture and tell me if the impulse jewel is correct (position) I was on the train of thought that it should be at right angles to the spikes of the balance wheel.

This is how this one came to me and it's firmly attached, after a day of using parts from 3 movements to make one runner I have this hurdle to cross now. The movement runs to a fashion but happily stops whenever it wants to, also the balance/escape makes a clanging sound every 3rd or so swing so something isn't quite right on the escapement side of things. Cheers for any help

[JimInOz]

You can't change the position of the impulse jewel on the table, it's inexroably aligned to the safety crescent.

 

What you can do is change the position of these items in relation to the escapement anchor by adjusting the stud anchor position or the rate adjustment stud.

 

Both of these activities are clearly explained in a couple of videos on Youtube, search for rebanking and overbanking.

 

One of our members recently posted these great tips but I can't remember who (Lagavulin has dulled the memory cells but delighted all other senses).

[JimInOz]

Found it, from matabog, some good videos explaining the issue. Go to the end of the thread.

 

 

http://www.watchrepairtalk.com/topic/3473-safety-roller/

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Ideal cheers my friend, over banking looks a good way to go as that's exactly what happens to this balance when it's running.

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I'm happy that the actual impulse jewel cannot be moved but the table it sits on can, so is the table wrongly fitted? I as this only because all others I've had are more central ie 90degrees to the arms.

But in the location it is, the impulse jewel sits as near as dammit midway between the banking pins when the balance is at rest, which is telling me (with my limited knowledge) that the roller table is correctly fitted.

[Geo]

But in the location it is, the impulse jewel sits as near as dammit midway between the banking pins when the balance is at rest, which is telling me (with my limited knowledge) that the roller table is correctly fitted.

If it is sitting as you say, it is correct.

If the balance wheel is perfectly poised, it really doesn't matter what position the spokes sit when the balance is at rest as long as the hairspring and balance jewel are set correctly relative to one another and the escapement wheel.

It always looks that bit neater when the jewel is at 90 degrees to the spokes of the balance, but you would have to fiddle about withe the position of the hairspring collet relative to balance wheel to get it to sit where you want it when the balance assembly is fitted to the movement. Once you achieved that you would then have to fit the roller table and fine adjust it relative to the line between the balance and escape wheel pivots to ensure correct beat. All in all not worth the effort!