On Thursday 24 January 2013 12:42:26 andy pugh did opine: Message additions Copyright Thursday 24 January 2013 by Gene Heskett
> On 24 January 2013 16:27, Gene Heskett <[email protected]> wrote: > > All my current problems regarding this would go away if the switch > > hysteresis backup move would just do another 5 thou of back away > > anyway if it found the switch open when it checked instead of > > freezing in place and fussing with a big red error advisory because > > the switch was found to be already open as it started the back away > > move. > > I have a feeling that the issue here is that you are using a touch > probe as a home switch. > > Use a probe routine to measure tool length, not a homing routine. However, this way, if I ever get the x offset correct (that is being a Cast Iron Bitch because the .ini files homes & offsets are in radius mode even if the lathe is running in diameter mode, THEN I can write all the gcode in absolute values such that Z0.000 is the end of the workpiece sticking out of the chuck. Right now, I am working on putting a ball screw in the Z axis so its apart and I can't play, but the concept sure seems like it should be consistently workable to me. Ditto for using a boring bar or internal threading tool, swing the backside contact into position and measure. But home can't do that because there is no q & d way to reverse the motions for a backside search. So that will probably wind up needing a G38.2 in the code itself, to set G55 at the proper X offset and run the target code to bore a hole, or thread it, in the G55 co-ordinate system. I'll probably be able to figure it out eventually, and may even wind up asking dumber questions yet. OTOH, if I have to ask the question, how does that reflect on the state of the docs? Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> You cannot propel yourself forward by patting yourself on the back. I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnnow-d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
