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7S26 Pallet Insertion

mlfloyd1
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mlfloyd1 WRT Addict

mlfloyd1

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It’s driving me nuts.

Which end goes into the baseplate the long point or the short point?

I can’t get it to stay put.

The pivots don’t appear to be broken.

Thanks for any help you can provide.

 

 

 

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GeorgeC WRT Addict

GeorgeC

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As OldHippy points out, if you can imagine that the escape wheel is pictured in place below, it's rotation would be in a clockwise direction.  You see that the left hand pallet stone is "open" at it's face angle to allow the next tooth to come in and the right pallet stone face is at an angle to so to speak "catch" the face of the escape wheel tooth.

I have an image from Jules Borel showing the escape wheel in position.  I hope this simple thought process makes it stick in your mind better.

 

 

Quote

GL-Pallet.png

 

Screen Shot 2018-07-04 at 2.00.33 PM.png

Edited by GeorgeC
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mlfloyd1 WRT Addict

mlfloyd1

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I have the pallet in position and the pallet cock screwed down.

I am able to move the pallet fork back and forth.

I turned the ratchet wheel to put a little wind on so that I could insert the balance wheel. This where I’m having the problem now. The balance wheel won’t catch.

 

 

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oldhippy Distinguished Member

oldhippy

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If the clock has a platform escapement, it is the same way.

It will take a bit of practise at first. Some balance complete are more difficult to fit then others. You just might have a stubborn one. Just be careful.   

 

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jdm Distinguished Member

jdm

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10 hours ago, mlfloyd1 said:

I've put it in and out so many times without success that I hope I haven’t damaged the hair spring.

If the pin doesn't go in right away lift the balance slightly and rotate in the direction where the pin stopped by the pallet arm, so it can fall in place.

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mlfloyd1 WRT Addict

mlfloyd1

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I think the balance spring is distorted after so many fruitless attempts.

Now I have to order a new spring, balance wheel, and cock.

 

I won’t even try to put it on cock; I have to buy it completely assembled.

 

 

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anilv Distinguished Member

anilv

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Oh dear...thats not good.

A bit of advice.. whenever you get stuck, stop and think about it.

In the first instance you had a problem figuring out which way the pallet fork went in. Your next step should be to observe how the pallet fork interacts with the other parts.. in this case the escape wheel and balance-wheel. The escape wheel end will not help you but if you had looked on the underside of the balance you would have notice the roller jewel and you would then realize that there's only one way the pallet-fork will go as there is a centre-pin on the pallet-fork (called the guard pin) which would interfere with the roller jewel if the pallet fork is installed upside down.

In the second instance, you would realize by now that the roller jewel is the one giving motion to the pallet fork, as such it needs to be in the middle of the pallet fork arms. If it does not swing freely you need to eliminate probably reasons it doesn't ..is the balance in the pivots? Is the roller jewel in the fork?

It is important to always analyze why something does not go well,  you WILL get better at this but you need to consciously do this in the beginning. It will become second nature after a while.

I hope the above doesn't too much like a lecture but if you don't develop the habit of thinking through problems you will end up being more frustrated and the end result is a mangled hair-spring.

As always...good luck!

Anilv

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jdm Distinguished Member

jdm

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14 hours ago, mlfloyd1 said:

I won’t even try to put it on cock; I have to buy it completely assembled.

I have had the same trouble until I found (by myself) the method that I gave you before. It was also quite difficult for me to position both the pallet and the balance pivots in the jewels.

Now, if your goal is to get the watch running I recommend that you buy a new movement complete.
But if instead is to learn I recommend that you follow Mark's lessons from the start, possibly practicing on 6497 movement, or other large one of low value.

One can fully understand the theory and the practical problem but still have trouble executing the task due to the lack of manual dexterity and proper tecniques. You hear that these are developed over time but in reality like every skill in life there is also a talent factor, plus good sight and hand steadiness required. If these are not there to a certain amount it's going to be a tough battle with lots of losses.

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  • 1 month later...
mlfloyd1 WRT Addict

mlfloyd1

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I didn’t buy another 7S26 movement; instead I purchased a new balance/cock assembly.

This time it went in on the first try.

The movement runs great.

I have two spare 7S26 movements now since I upgraded my SKX007 and 009 to the NH36 movement.

Thanks for your help.


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VWatchie Distinguished Member

VWatchie

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On 7/6/2018 at 5:15 AM, anilv said:

A bit of advice.. whenever you get stuck, stop and think about it.

Absolutely splendid advice, and if I may I would suggest taking a lot of pictures (more pictures than you think you might need). It has helped me a lot.

 

On 7/6/2018 at 5:15 AM, anilv said:

I hope the above doesn't too much like a lecture

Not one bit! This is what WRT is for!

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VWatchie Distinguished Member

VWatchie

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On 7/6/2018 at 8:12 AM, jdm said:

in reality like every skill in life there is also a talent factor

I don't believe in that idea one bit. I always tell my students (IT) and my kids that the only "talent" you need in life is the will and the ability to put in the hours. In general, everyone can succeed if they put their mind to it.

 

On 7/6/2018 at 8:12 AM, jdm said:

good sight and hand steadiness required

Unless you have a physical disability, there are glasses, eye loupes, and stereo microscopes, and hand steadiness can be acquired by practicing breathing and relaxing (Tip: training competitive shooting is a great way to improve this).

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