On Wed, Oct 15, 2008 at 01:54:27PM -0700, Kirk Wallace wrote: > > I haven't pursued this yet, but it may be that soft limits won't work > properly if you don't setup and use the same machine zero at every > power-up. I tend to think that machine zero and part zero are different > things. There are features and procedures to handle both. It seems that > even if you don't have hardware limit switches, it would be best to > forgo a bit of convenience and get into the habit of using your machine > as if it had hardware limits. Soft limits may not be important for a > Sherline class machine, but you can start to break things with bigger > machines when you overrun limits. Getting up to speed with this, is on > my roundtoit list. > > Kirk
Kirk, when I did not have limit switches on my desktop machine, I jogged it to a certain position (marked so it's easy to see by eyeball alone) and homed it there. Then I got the protection of soft limits just like you say. I would then set a relative part origin with touch off. Soft limits keep you from jogging too far, but also it's nice to get a warning before a program starts, if you're zeroed incorrectly. On both my desktop machines (mill and lathe) X can actually unscrew itself out of the nut if it goes too far. I'd rather get a soft limit warning! I can't think of any reason to NOT home a machine... ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
