escapement wheel design

[Tak]

Hi,everyone
I started my first project making a gear clock with GM.
So far I have cut all the gears except escapemen t wheel.
The escapemen t wheel has 60 teeth and I set module 3.0 which makes the wheel diameter 180mm.
I tried to cut this few times on my cnc router with different settings but no success.
Simply the teeth is too fine for the plywood.
I tried to set the parameter s to change the shape to make the teeth good enough for cutting out of plywood.
So far I couldn't get the shape I wanted.
Is any solution for this?

PS sorry for my bloody English as I grown up in non English backgroun d.

[ArtF]

Hi:

  Try increasin g your witness ratio on the screen. It makes the teeth thicker.. Also, if using plywood, make sure its russian birch, its the only plywood I know of with no internal gaps that make small plywood teeth break..

Art

[Brian Decker]

Agree 100% with Art - I've got 4 of the GM escapemen ts running now and they are all 3/8ths Baltic Birch.  The teeth are holding up fine - though I think for a long-lasting clock some thought needs to be given to the going train so the teeth are not bearing too much force.

[Tak]

Thanks Art
I'll try and come back later.

Hi Brian
Would you mind sharing your parameter of the escapemen t wheel setting please.

[Brian Decker]

Sure - it's basically the stock setting with the shafts changed to 1/2" -

MOD: 6.3500  DP: 4.00 Teeth: 30.00 Pressure Angle: 20.00
Pitch Diam: 7.5000  Outside Radius: 3.7500
Cycloidic: 0  Shift: 0.00 Stubbing: 1.00 Width: 0.50

[Tak]

Thanks Brian
I'll try yours first.

Sure - it's basically the stock setting with the shafts changed to 1/2" -

MOD: 6.3500  DP: 4.00 Teeth: 30.00 Pressure Angle: 20.00
Pitch Diam: 7.5000  Outside Radius: 3.7500
Cycloidic: 0  Shift: 0.00 Stubbing: 1.00 Width: 0.50