How to measure balance end shake?

[AP1875]

Reading through a service sheet for the Rolex Daytona and the movement has a 'regulation nut' under the balance bridge. You can adjust this to get the correct endshake. How is this measured? Is a special tool used?

 

[Nucejoe]

 

Though Rolex expectedly provides instruction for every aspect, yet in general and according to the diagram, slackening you back off 90 to 135 degrees.

Tighten to a point, where the slightest slackening releases the balance wheel.

I am sure  specific advice will come as members finish breakfast.

 

[Nucejoe]

I guess the approach I explained above ( poorly ofcourss) is widely practiced.

1- I tighten the screw unitl both endstones come to contact with the staff pivots.

Just about the point the balance wheel resists moving freely.

2- Slacken the screw back, about 90 and 135 degrees, that corresponds to between 2 to 3 hundereth of a mm of endstones displacement ( further apart).

Lucky Rolex offers this design, you got to shim, gauge ...on popular designs.

I see no need for measuring tools. 

 

 

 

[jdm]

15 hours ago, AP1875 said:

Reading through a service sheet for the Rolex Daytona and the movement has a 'regulation nut' under the balance bridge. You can adjust this to get the correct endshake. How is this measured? Is a special tool used?

Looks like it's possible to do that on the timegrapher. Amplitude decrease = too little endshake. Large position variance or other irregularities = too much. The range is 1 cent. of mm and not directly  or easily measurable. 

Edited August 20, 2019 by jdm

[AP1875]

On 8/20/2019 at 3:30 PM, Nucejoe said:

I guess the approach I explained above ( poorly ofcourss) is widely practiced.

1- I tighten the screw unitl both endstones come to contact with the staff pivots.

Just about the point the balance wheel resists moving freely.

2- Slacken the screw back, about 90 and 135 degrees, that corresponds to between 2 to 3 hundereth of a mm of endstones displacement ( further apart).

Lucky Rolex offers this design, you got to shim, gauge ...on popular designs.

I see no need for measuring tools. 

 

 

 

Thank you for explaining your method seems very logical (if I have understood correctly) and no need for tools. Also, I realised if a tool was required Rolex would've made one and referenced it here as they do elsewhere. 

So tighten the screw so there is barely any endshake (which might mean the balance not moving) then slacken off and check on the tinegrapher as JDM suggests for optimal position. 

[Nucejoe]

1 hour ago, AP1875 said:

Thank you for explaining your method seems very logical (if I have understood correctly) and no need for tools. Also, I realised if a tool was required Rolex would've made one and referenced it here as they do elsewhere. 

So tighten the screw so there is barely any endshake (which might mean the balance not moving) then slacken off and check on the tinegrapher as JDM suggests for optimal position.

Perfect. You said it better than I.    Good luck