In setting up the homing switches on my lathe, there are two items in the .ini file I don't quite have the results I see, making any sense when I adjust them.
These are HOME_POSITION, and HOME_OFFSET. Currently I have a switch on the crossfeed that triggers about 5 thou short of a maximum mechanical backout, so close in fact that the switch is not damaged if the X backout switch is disconnected. So that switches over travel protects it from being crushed. Minor detail. The Z switch, is now hidden under the back lip of the rear of the bed, location such (determined by a handy screw hole for the backsplash that is no longer there since the x motor is on the rear) that its closed by the rear gib riding over its roller as it approaches the spindle, in this case about an 25mm from hitting the chuck. Currently I do X first, and leave it sitting about a mm inboard of that switch, so if there is no tool on the tool post, it can then approach the chuck with no danger of hitting it, find the Z switch, do the double shuffle at low speed, then somehow it backs away about 30mm and puts the star on the z axis dro. This seems to give me a much more consistent "zero" position than the gauge I made, its x positioning was often a mm or more randomized even though I made it into a 3 point contact. Where I am puzzled is that both HOME_POSITION and HOME_OFFSET seem to control where its gets parked. How can I differentiate them so I get the effect I want, which is to park Z another 50mm to the right so its safe to drop a tool on the toolpost and start the spindle? So which is which? 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 ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
