David Braley wrote: > Hello all, > > Working away at researching my Anilam 1100 mill retrofit. Started to > read the EMC2 Integrators Manual V2.3. Seemed like the most useful > document for me at the moment. Figured I might learn something, so I > don't ask too many noob questions. So far so good. > > Did get to an interesting part of the manual in the early chapters on > the concept of Homing. The idea and how to do it is straight forward > enough. But this is the thing that really bugs me about the whole > concept of homing. Why? I mean really, why. The limit switches keep your > machine from crashing. So why home it? > Soft limits require EMC to know the position of the machine slides, not just the position relative to the part. Soft limits then allow the program to say "Hey, you will crash into the machine's travel limit at line 22,543, do you really want me to start machining this part?"
Also, if you have mapped the errors in the leadscrews, it needs to know the absolute position of the screws to apply the correction tables to the right spot. If you have set up tool change positions, it needs to know the absolute position to get to those positions. If you have a 5-axis machine, it needs to align a bunch of axes correctly to accomodate the offsets between the swivels and slides. This is all less applicable to retrofitted manual machines, but will still save you from annoying re-setups when you didn't position things right the first time. Much better to discover it before the first cut is taken. Jon ------------------------------------------------------------------------------ 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
