On 25/01/2012 16:39, andy pugh wrote:
> On 25 January 2012 16:22, Ian W. Wright wrote:
>
>> It is a long,
>> tedious but ultimately simple and low-tech process and, to
>> get it right, this is the only way to do it.
> I would have thought that, in principle, a torque meter and encoder
> could accu
On 25 January 2012 16:22, Ian W. Wright wrote:
> It is a long,
> tedious but ultimately simple and low-tech process and, to
> get it right, this is the only way to do it.
I would have thought that, in principle, a torque meter and encoder
could accurately measure the mainspring characteristics,
Found my pics of the few pages in
The science of clocks and watches
A. L. Rawlings British Horological Institute 1993
about the fusee
http://www.collection.archivist.info/archive/DJCPD/PD/2007/2007_06_06_Rawlings/
Which has some maths for those wishing to put it in gcode
Dave Carolin
As John said, in horology, the curve of a fusee has to
exactly match the force of the mainspring if it is to do its
job properly. The idea is that the force of a wound up
spring is much greater than that of a spring which is mostly
unwound and the fusee is there as a continually variable
pulle
Dave Caroline wrote:
> On Wed, Jan 25, 2012 at 12:38 PM, Lester Caine wrote:
>> > John Prentice wrote:
>>> >> From: "John Thornton"
>>> IIRC Jeff Eppler cut a fusee for a mousetrap powered car...
>>> >>
>>> >> Sadly a fusee for clock work needs a curved profile to match spring
>>> >> for
On Wed, Jan 25, 2012 at 12:38 PM, Lester Caine wrote:
> John Prentice wrote:
>> From: "John Thornton"
>>> IIRC Jeff Eppler cut a fusee for a mousetrap powered car...
>>
>> Sadly a fusee for clock work needs a curved profile to match spring forces
>> rather than straight line.
>>
>> I think they ar
John Prentice wrote:
> From: "John Thornton"
>> IIRC Jeff Eppler cut a fusee for a mousetrap powered car...
>
> Sadly a fusee for clock work needs a curved profile to match spring forces
> rather than straight line.
>
> I think they are hard to cut on a CNC lathe although reasonably easy to mill
>
- Original Message -
From: "John Thornton"
> IIRC Jeff Eppler cut a fusee for a mousetrap powered car...
>
> John
Sadly a fusee for clock work needs a curved profile to match spring forces
rather than straight line.
I think they are hard to cut on a CNC lathe although reasonably easy
