On 29 June 2014 13:47, John Thornton <[email protected]> wrote: > CSS requires Spindle Feedback and an index pulse once per rev. > Rigid tapping in addition requires a way to reverse the spindle.
I don't think CSS needs an index, but as threading really does, a lathe needs an index. rigid tapping needs the second quadrature channel to spot spindle reversal. On my mill I have it set up so I can choose a gear suitable for the cutter/job, and a bit of HAL trickery auto-detects the gear and adjusts the VFD frequency request to suit. I would have the same on my lathe, except the lathe has no gears. (which I often wish were not the case) http://linuxcnc.org/dapper/emc2/emc2/index.php/italian/forum/47-hal-examples/27071-automatic-spindle-gear-detection#39583 You may not need a braking resistor, I don't have one and have noticed no real problems. (If I was to reverse too quickly I would worry about the chuck screwing off anyway) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
