IIRC Jeff Eppler cut a fusee for a mousetrap powered car... John
On 1/24/2012 3:52 PM, John Prentice wrote: > ----- Original Message ----- > From: "Kent A. Reed"<knbr...@erols.com> > > >> Several items were called out recently as being show stoppers for >> LinuxCNC. I do not aspire to learn the inner workings of LinuxCNC well >> enough to contribute to discussion of the first item, "No jog on >> feedhold". >> >> However, the second item "Taper thread pitches are measured along the >> hypotenuse ???" is an issue I think this bear of limited brain ought to >> be able to understand without being a LinuxCNC guru. >> > (a) The jog in feedhold really is a significant pain. You do need to move > the tool away from the work when milling or turning "stringy" materials. > Even something simple like deep-drilling with pecks can snarl up the tool > with swarf. Of course the general solution could be very complex (e.g. if > offsets were to be changed while feedheld) but some simple rules would cover > a lot of cases without obvious risks to a thinking user. > > (b) For most practical tapered pipe threads no one will notice the pitch > error. On one hand I think it is unusual CNC behaviour in threading (so > possible difficulties for CAM users without a special postprocessor). But on > the other hand the case of the angle not being small but being 90deg does > appear to allow cutting of scrolls - has anyone ever tried this? > > John Prentice > > . > > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
