Re: EMC Homing Switches

[Dan Falck <dfalck-at-sprynet.com>]

I use the home switches as a reference at the beginning of a run.  Usually,
they are where 0,0,0 is, but not always.  Things can get tricky if you are
running a program that uses G54 through g59.3 fixture offsets and you abort in
the middle of a program.  Things can also be flaky if you call out a G92 Xxxx
Yyyy at the beginning of a session that isn't  X0 Y0.   When you fire up the
next session and then home to the switches, EMC will revert back to the
previous sessions G92 coordinate call.  Try it out.  Open EMC,  then at a
random position go into MDI mode and type "G92 X5.0 Y5.0".  Shut EMC down. 
Reopen EMC and home to the X and Y switches.  The display on the screen will
show X5.0 Y5.0.  
Whatever you do, be consistant, know where you want your home switches to
reference, whether it's X0, Y0 or X1, Y1 etc...
I finally got Tkemc running again (renamed emc2.run emc2.ini) and tried out
Ray's homing script.  It works very well when I set up a .5" offset from the
switches.  All you have to do is press a button when prompted and it sets the
machine  up for you and gets you into auto mode.  Very slick.

Thanks,
Dan