On 14 December 2012 01:28, Leonardo Marsaglia <[email protected]> wrote:
> I know there are several Cam programs that could mill a lobe, but I think > is better to use nurbs or something like that to generate the toolpath > without using a Cam program, the only tricky thing would be the radius > compensation for the tool that could be done with some trigonometric > calculations The tricky part is not the machining of the profile, but in calculating the profile. For a given relationship between lifter position and camshaft angle the calculation of required cam profile is very much complicated bythe geometry of the follower. A roller follower in a linear guide can be trivial if one simply machines the cam using a milling cutter of the same diameter as the cam follower. Any other situation is more complicated, due to the movement of the contact point angularly as the tangent point changes (very markedly indeed for flat followers) and as the rocker arm swings for roller followers. If you have a dedicated machine setup for the job then you can generate the cam profile outside of the G-code. This example: http://www.youtube.com/watch?v=FpP7iTKuWpw Is just running a normal lathe OD turning cycle. The profile is generated by a lookup table into a special HAL component. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
