On Sat, Sep 04, 2010 at 09:27:42PM -0500, Stuart Stevenson wrote: > The spindle servo amp is a true servo drive. The speed control is +10 > volts for max clockwise spindle speed and -10 volts for max counterclockwise > spindle speed. It has an encoder on the spindle motor with AB feedback to > the amp. It does not have an index pulse (we have not found one). It may > have an index pulse out of the spindle motor encoder but it is not wired in. > With a two speed gearbox the index pulse would not work for accurate spindle > positioning. I will install an encoder on the spindle.
On my machine I hooked one of the A/B channels also to index. For normal tapping you just make one pass anyway, so orientation isn't important. This just gives "lots" of index pulses, so when you tap it just starts moving right away. A mill is not like a lathe spindle where every thread is multipass and they have to line up. With a proper index you can peck tap, but I have never wanted to do that. Chris ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
