Re: [Emc-users] Lost fractions of a step - Clock Wheels and Pinions

2016-01-03 Thread Gene Heskett
On Sunday 03 January 2016 12:37:55 Kirk Wallace wrote: > On 01/02/2016 10:02 PM, Cecil Thomas wrote: > ... snip > > > Several years ago I wrote a program to "generate" involute gear > > teeth by making multiple cuts of the same tooth from differing > > angles with a rack shaped cutter. This

Re: [Emc-users] Lost fractions of a step - Clock Wheels and Pinions

2016-01-03 Thread Dave Caroline
The book which has a selection of standards is Gears for small mechanisms by W.O. Davis, it was reprinted by TEE publishing ISBN 1857610156 Note the correct form has a rectangular root which stops the end mill kludge. We just used the Thornton cutters to get it right. The cycloidal form has a

Re: [Emc-users] Lost fractions of a step - Clock Wheels and Pinions

2016-01-03 Thread andy pugh
On 3 January 2016 at 17:37, Kirk Wallace wrote: > I'm also working on a New Haven clock that seems to use custom screw > threads (#3-40?) that don't appear in Machinery's Handbook or anywhere else. I thought it might be a watch pendant thread, or Progress, but I

Re: [Emc-users] Lost fractions of a step - Clock Wheels and Pinions

2016-01-03 Thread Kirk Wallace
On 01/02/2016 10:02 PM, Cecil Thomas wrote: ... snip > Several years ago I wrote a program to "generate" involute gear teeth > by making multiple cuts of the same tooth from differing angles with > a rack shaped cutter. This eliminates the need for the different > cutters when making only one cut