Merlin band clock again

[Ken RatcliffeParticipant @kenratcliffe25229]

Hi All,

My Merlin Band clock is progressing (having fun with Archimedes screw on the main arbour, but hopefully that is just a bit of practice). This is a question about the crown wheel. In the book by John G Wright it states to use a fly cutter with the dimensions given…….the only "given" is a sketch of the teeth and it has x2 above it. Not sure if it X2 scale, if this is an accurate shape and it seems a critical part of the clock (escapements always give me trouble).

So, I guess I am asking if anyone out there has built this clock and what should the fly cutter look like – ir what should the teeth on the crown / escapement wheel look like!?

Many thanks

Ken

[Ken RatcliffeParticipant @kenratcliffe25229]

[Martin KyteParticipant @martinkyte99762]

If you have the same book as I have the fly cutters for the clock and specifically the escape wheel can be found on page 66 where the dimensions are given on the view next to the expanding mandrel details. This shows the radius of the curved face to be 7/32". I have not built this clock so any help I can be just comes from reading the published design. The should be some information in Gazeley and I cannot lay my hands on my copy just at the moment. Again just what I read in the text.

Hope this helps a little if I discover more I will pass it on.

regards Martin

Edited By Martin Kyte on 07/10/2020 22:31:13

[Michael GilliganParticipant @michaelgilligan61133]

This is not actually answering your question, Ken … but it might be of interest as there are some decent photos included: **LINK**

http://www.my-time-machines.net/croce_merlin.htm

MichaelG.

[Ken RatcliffeParticipant @kenratcliffe25229]

I feel so dumb ! Yes, the cutters are pictured on Page 66. I read and read, but didn't go to the back on lathe tools. Thank you ! Any tips on cutting the screw in the arbour welcomed !

Its always good to have some pictures to look at, I have been using the You tube video a lot https://www.youtube.com/watch?v=-xGWCN8k6Sg

[Ken RatcliffeParticipant @kenratcliffe25229]

Hi again……have you guys built the Marlin Band Clock ?

I am coming unstuck on the 8tpi thread on the centre arbor (TBH struggled to turn 6" of free cutting silver still down to 3/32" first time I tried). I have just put a post out asking for any help / hints, but then thought you may have built one and have some suggestions ?!

Any help welcomed

Ken

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