My lathe CNC conversion uses a servo motor to drive the spindle. It is 4000ppr, with an index pulse, controlled by a 5i20 and 7i33. It uses a 1:3 pulley ratio. Can I set this up for threading?
I had a quick try, machining a simple test thread, but as I expected, using a standard setup, I got a 3 start thread because there are 3 index pulses per spindle revolution. I suspect adding a simple pulse divider (divide the index pulses by 3) wont work either, because there is the index-enable pin which not only signals an index, but resets the encoder count to zero at the 5i20 level. If there is no component already out there, I was thinking of a component that sits between "motion" and the 5i20 encoder. It knows how many counts per revolution, so when it gets to 2 1/2 revolutions, it can set up the index-enable link to notify "motion" and reset the 5i20 - "set up" meaning set index-enable to true. Any thoughts? Frank ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
