On Wed, 2010-11-24 at 10:46 -0800, Edward Bernard wrote: > What is a "screw flag". An encoder?
An encoder index or a flag that allows one to reproduce the same position within .0005", or whatever the application calls for. I would not trust most home switch configurations by themselves. They should be ANDed with a sensor with a mechanical advantage, such as on the lead screw or axis motor shaft. The home switch gets you within one turn of the flag or index, sensing the flag gets you home. Currently, on my mill, I have markers on each axis. I jog each axis to line up the makers, then watch the hand wheels and jog to line up "0" on each dial, then I press home for each axis in AXIS. Using a home switch could replace the markers. Using a flag or index, could replace the dials, and allow EMC2 to automate the home sequence. When you know where your home is, you know where your fixtures and soft limits are. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
