> On Sun, 15 Jan 2012, a...@conceptmachinery.com wrote: > >> Date: Sun, 15 Jan 2012 22:42:44 -0700 >> From: a...@conceptmachinery.com >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> Subject: [Emc-users] tapping problem? >> >> Hi >> i there spindle motor and motor drive that can be better used for >> tapping? >> Problem with use tap is that spindle motor can easy crash tap and after >> that extra charge - + equipment - to remove broke tap from hole. >> >> Every one try to get max from each tap and many times tap that "look >> good" >> crashed in the hole. >> Where is solution? >> The solution is in torque sensitive motor- motor drive system for >> spindle. >> Example: tap 1" can hold 80 lb.ft. More than that tap will be crashed. >> Motor drive that can be programmed - do not exceed 80 lb.ft , and if so >> E-Stop machine. >> For smaller tap torque can be programmed for 20 lb.ft for bigger tap >> 200 >> lb.ft and etc. >> Idea is clear. >> Put this kind motor drive under EMC2 control and problem solved. >> Is there better solution to prevent breaking tap in hole? >> >> Thanks >> aram >> > > > > This is just a standard torque mode drive with a PID output limit applied. > I do wonder is this would really help though, since the spindle > inertia is sufficient to break the tap if it "grabs"
What about to use EMC2 servo drive -control? when machine with EMC2 go into E-STOP , axis does not move by inertia. Controller try to hold position of axis where E-STOP happened. Am i right? Same could be apply to control spindle. Reality on shop floor is that when do work such tapping, everyone knows about to look at tap, but it is not the solution for problem, particularly when big shop and machinist want to have just a job!!! Machine must be design for every day machinist not a "Albert Einstein". I think such unit must be stand alone product to be integrated with different controller, to all machine can benefit from it integration. > A torque mode drive could possible be used another way however. Since the > torque applied to is measureable (just the PID output) > Having a work-per-tapped-hole figure could warn of a dull tap > > aram ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
