"For the little lathe... it works just fine so I'll leave it alone and start working on adding x and Z motors on my newly acquired Monarch 10ee.
Before I start getting rotten tomatoes thrown at me for doing such a travesty I must note that this machine is what is called a "base" model. it left the factory with no lead screw, no change gears and no way to add them back even in the unlikely event that I could find them. There is also no taper attachment. So why would I ever buy such a machine??? I didn't. It was a gift. I've sunk about $200 into a rotary converter with idler(no need for variable speed) and I think I can add a ball screw and servo to the Z and a servo to the x for less than $400. Must look into Mesa servo drives." Cecil no the tomatoes are for scoring this retrofitable king of machines :) On Thu, Apr 4, 2013 at 10:52 PM, Cecil Thomas <wctho...@chartertn.net>wrote: > I have recently converted a jet 9x20 to CNC using gearhead servos on > the x and z and a treadmill motor on the spindle. I made my spindle > encoder out of a CD with 20 notches with one deeper than the rest. I > read the counts with active electronic optical interrupters so the > output is clean and full voltage. I have A, B and Z encoders so I > get 80 counts per rev which I think is plenty good enough and doesn't > cause crazy high count rates at high spindle speeds. > I control the spindle speed with PWM through another optical > interrupter for isolation. I actually do my threading with g33 > because it was so easy to rewrite my threading programs from servo > spindle to indexed spindle. I am very comfortable with my threading > program because it works referenced to the outer diameter of the > stock or the inner diameter of an internal thread which is the way I > think. Also since it's my code I can modify it any time for any reason. > > For the little lathe... it works just fine so I'll leave it alone and > start working on adding x and Z motors on my newly acquired Monarch 10ee. > > Before I start getting rotten tomatoes thrown at me for doing such a > travesty I must note that this machine is what is called a "base" > model. it left the factory with no lead screw, no change gears and no > way to add them back even in the unlikely event that I could find > them. There is also no taper attachment. So why would I ever buy > such a machine??? I didn't. It was a gift. I've sunk about $200 > into a rotary converter with idler(no need for variable speed) and I > think I can add a ball screw and servo to > the Z and a servo to the x for less than $400. Must look into Mesa > servo drives. > > Cecil > > >You can probably add an index to the spindle and set up for G76 etc. > >The motor encoder and belt ratio will give an unusual number of counts > >per rev, but it's just a number and computers don't care. > >However, you do need one index per _spindle_ rev to do G76 threading. > > > > ------------------------------------------------------------------------------ > Minimize network downtime and maximize team effectiveness. > Reduce network management and security costs.Learn how to hire > the most talented Cisco Certified professionals. Visit the > Employer Resources Portal > http://www.cisco.com/web/learning/employer_resources/index.html > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- jeremy youngs ------------------------------------------------------------------------------ Minimize network downtime and maximize team effectiveness. Reduce network management and security costs.Learn how to hire the most talented Cisco Certified professionals. Visit the Employer Resources Portal http://www.cisco.com/web/learning/employer_resources/index.html _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users