http://www.youtube.com/watch?v=88CgdUkrk3s
here like this . if you set ti up to use a master lobe you can machine the lobe on a cnc mill then machine it off the master lobe and produce any cam you want On Wed, May 29, 2013 at 3:38 PM, jeremy youngs <jcyoung...@gmail.com> wrote: > do you have a master cam? if so you could just build a cam duplicator > > > > On Wed, May 29, 2013 at 2:24 PM, andy pugh <bodge...@gmail.com> wrote: > >> On 29 May 2013 18:49, Leonardo Marsaglia <leonardomarsagli...@gmail.com> >> wrote: >> >> > Anyway I don't see too much room for a linear motor since the machine >> now >> > has a piston, I don't know if there is in existance a linear servo motor >> > with the shape of a piston, all circular or something like that, they >> must >> > exist anyway. >> >> There are voice-coil servos, but I doubt they have enough force. >> >> I would actually be tempted to try a servo motor and crank on top of a >> conventional X-axis. >> In a rare move away from CNC, the crank throw would probably need to >> be manually adjusted to suit the total cam lift. >> >> For a simple eccentric this would only need to rotate at constant >> speed in exact phase with the spindle. >> As your cam profile deviates from the simple eccentric, then the >> relationship between the angular position of the two motors needs to >> be modified. >> >> Here is a HAL component that could apply this modification: >> http://www.linuxcnc.org/docs/devel/html/man/man9/lincurve.9.html >> >> It isn't ideal as it stands, it would need to be able to read cam >> profiles in from a data file. >> >> I think that mechanically this is a lot less challenging for the servo >> and controllers, the motor never changes direction, it just slows down >> and speeds up relative to the spindle. >> >> -- >> atp >> If you can't fix it, you don't own it. >> http://www.ifixit.com/Manifesto >> >> >> ------------------------------------------------------------------------------ >> Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET >> Get 100% visibility into your production application - at no cost. >> Code-level diagnostics for performance bottlenecks with <2% overhead >> Download for free and get started troubleshooting in minutes. >> http://p.sf.net/sfu/appdyn_d2d_ap1 >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > > -- > We conclude that the Second Amendment protects an individual right to keep > and bear arms. That right existed prior to the formation of the new > government under the Constitution and was premised on the private use of > arms for activities such as hunting and self-defense, the latter being > understood as resistance to either private lawlessness or the depredations > of a tyrannical government." - U.S. Court of Appeals, D.C. Circuit, March > 9, 2007 > > > > jeremy youngs > -- We conclude that the Second Amendment protects an individual right to keep and bear arms. That right existed prior to the formation of the new government under the Constitution and was premised on the private use of arms for activities such as hunting and self-defense, the latter being understood as resistance to either private lawlessness or the depredations of a tyrannical government." - U.S. Court of Appeals, D.C. Circuit, March 9, 2007 jeremy youngs ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
