On Wed, Jan 25, 2012 at 12:38 PM, Lester Caine <les...@lsces.co.uk> wrote: > John Prentice wrote: >> From: "John Thornton"<bjt...@gmail.com> >>> 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 >> with a 4th axis - apart from the required overhang on a small diameter mill. > > Like this? > http://medw.co.uk/fisheye/view_image.php?image_id=532&gallery_path=/23/92/37
Yes like that but a correctly cut fusee on an antique clock does not have lead in/out ramps but stop sharply at the chain/rope mounting usually. Probably easier to mill. Somewhere I have the maths for the curve but cant find at the moment. Dave Caroline ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
