Steve Blackmore wrote: > RS274 had no feed per rev, but did have feed per minute and inverse time > mode and used F for both of those. I just don't see the point why a > totally different letter was chosen for another simple feed mode, and > I'm sure, had NIST had a feed per rev, they would have used F, if > nothing more than just to be consistent.
EMC2 does have feed per rev, and it does use F for the feed. G93 = inverse time mode G94 = units per minute mode G95 = units per rev mode G95 is simply an unsynchronized feed per rev, not suitable for threading. It is simply a way to get a nice constant chip thickness, especially when using constant surface speed. The above three feed modes apply to G1/G2/G3 line and arc moves. The G9x feed modes and the F word value are completely ignored for G33 synchronized moves. G33 is a synchronized move intended for threading and G33.1 is for rigid tapping. They use K for the thread pitch. Pitch is one thing, and feed is another, and never the twain shall meet. Personally I like it that way - I can set the F word for normal cutting, and don't have to worry about changing it for threading and then changing it back for the next cut. Regards, John Kasunich ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
