A depthing tool and escape wheel

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

Hi folks!

Can i use the deepthing tool to check the escape wheel and anchor to check the deept and tooth on escape wheel is in correct angle when the pallets do not hit one of the teeth?

I maked the new Graham escape wheel who are 18 mm and 25 teeth and learned out the pallets hit 2 teeth in same time, the other teeth is ok. The angle is not correct in the teeth. I used the indexing head to make the escape wheel. Not easy to make the small escape wheel with big indexing head.

I has not 25 teeth in the pulley at Boley watchmaker lathe.

Do you have idea to make precise indexed 25 teeth escape wheel and how to check the angle/division is correct?

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

[roy entwistleParticipant @royentwistle24699]

You can certainly check an escapement's action with a depthing tool

Roy

[john carruthersParticipant @johncarruthers46255]

Maybe a vernier on the indexing head?
360/25 = 14.4 deg.
(= 14 deg 24 arc min ).

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

I has Vernier on round rotating table, then I can create the dividing disc and attached on the rear spindle on the Boley watchmaker lathe. First I must check the indexing in the indexing head is correct in divisions in the correct angle/distance between each hole on the test disc. I can't be sure it's my fault under operation or fault with divisions in the indexing head.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Jens Eirik Skogstad on 11/06/2019 10:17:23:

I has Vernier on round rotating table, then I can create the dividing disc and attached on the rear spindle on the Boley watchmaker lathe. First I must check the indexing in the indexing head is correct in divisions in the correct angle/distance between each hole on the test disc. I can't be sure it's my fault under operation or fault with divisions in the indexing head.

.

Jens

I have previously described a simple and effective [albeit tedious] way of doing that check.

To avoid re-writing, I will try to find the previous post.

MichaelG.

.

Please see my post of 10-March-2019, here:

https://www.model-engineer.co.uk/forums/postings.asp?th=141169

I used seven holes as an example, but the principle applies

Edited By Michael Gilligan on 11/06/2019 10:32:34

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

Michael,.. thanks, there was very well information to check the hole is in same angle with two disc when turn the disc and reverse disc etc..

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