Hi all; Working on my micro-mill, putting ball screws in the x&y.
I have now rigged the nut holders with microswitches to prevent the motors from totally unscrewing the screws from the ball nuts. These switches are positioned so that the NO contacts are made in normal service, eg the lever is held depressed by the side of the screw, until the screw is within about 1/4" of the nut holder. The switch lever runs up the side of the screw, so wear there should be minimal. I am inclined to wire them so as to disable that stepgen when the screw clears the switch allowing it to open, as this seems like the safest way to do it. Any open, or a broken cable should result in the safe action. Can I treat this as a simple current loop in plain 2 conductor wire, or do I need to go get some of that foil shielded stuff we broadcasters use for audio? And is the rest of my thinking correct? I believe I have two inputs left yet, but with 4 axis's and a direction/speed spindle controller, I am out of outputs on a std parport. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
