On Wed, Sep 30, 2009 at 10:56:43PM -0500, Stuart Stevenson wrote: > Gentlemen, > I have previously requested the rotary axis usage as follows: > > 1: the rotary position stays within 0 and 359.999 > you never see 360 (or more) in the program nor on the position screen > 2: the sign (+ and -) tell the machine which direction to move > the sign has nothing to do with the commanded position of the rotary > table > 3: the rotary table is positioned to the 0 thru 359.999 degrees regardless > of the sign > ie. the position +90 and -90 are the same position > the difference is the direction of the table to arrive at the > position > an MDI command of 720 is a move in the positive direction to the 0 > position > an MDI command of -360 is a move in the negative direction to the 0 > position > on my machine with the Fanuc 15mb control the rotary scale errors out > when the internal register reaches 9999.999 degrees regardless of G92 zero > resets. on the EMC2 control this would not be a limit and the effect would > be essentially unlimited rotations without the need to wind or unwind
I see a clash between #1 and #3 above: you say in #1 that >=360 is not written in the program [and I assumed you meant that it is an error to do so], but then in #3 you say what both 360 and 720 do. This needs some clarification. I think several other folks have brought up some questions about this proposal and maybe I can filter out some noise and make them more explicit in order to help us talk about a more complete spec: How do you specify exactly one full turn? How do you specify a move that is more than one full turn, including, but not limited to, integer numbers of full turns where N>1? And some nobody has asked yet: What effect does G91 have? What effect does G53 have? Is something like G92 A-10 just an error or does it have some meaning? Chris ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
