Daniel Goller wrote: > How far does this reverse before going to new depth? > > And not only "space alloys" need it, helps in duplex stainless too. > > > > It's easy if your spindle encoder has index > > G33.1 K.05 Z-.1 > G33.1 K.05 Z-.2 > G33.1 K.05 Z-.3 > The G33.1 returns to the Z position it was at at the beginning of the move. So, it taps in to Z-0.1 on the first pass, reverses (going a little past the commanded depth as the spindle reverses) and then backs out synched to the spindle until it reaches the height at the start, switches the spindle to forward again and then seems to follow the spindle for just an instant, so it moves down just a hair in Z before breaking out of the spindle-synched move. (This may just return it to the original Z height, I haven't scoped out that little bump at the end.)
So, in this case, it would always come completely out of the hole on each move. You would have to carefully calculate each start height to be an integral pitch up or down to get the thread to sync up with what was already in the hole. Jon ------------------------------------------------------------------------------ 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
