On Wed, 2009-09-23 at 22:16 -0600, David Braley wrote: ... snip > The limit switches keep your > machine from crashing. So why home it? ... snip
Off hand, two reasons come to me. One -- the hardware limit switches are a back-up to the software limits. With proper config file data and a homed machine you should never hit a hardware limit. This is preferred because you can easily back off of a soft limit error, a hardware limit error usually disables all motion, so you have to override the limit to move an axis off of the limit switch. Two -- with an accurate home sensor (home switch with an encoder index, my index is at least better than .0001") you can reuse setups even after a power down. This is helpful with long runs and machines with tool holders. Also, I am in the habit of using G28 to send the axes to home for tool changes. There are better ways to handle this, but haven't learned those features yet. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
