> On Sat, Oct 25, 2008 at 09:20:38AM -0700, Dave Engvall wrote:
>   
>> I'm not at all certain that rehome works ( homing a second or more  
>> time after bring up emc). I ended up 0.1" off one time.
>>     
If it was EXACTLY 0.1000" off, then it sounds like homing to the wrong 
turn of the screw somehow.
If your screw is .2" pitch, then maybe there are two index pulses / 
rev?  Or is this a linear encoder?

If it was just off by ~ .1" with no accuracy to it, then it is some 
other problem.  EMC2 shouldn't particularly care whether the machine is 
homed for the first time since starting EMC, or rehoming.  It should 
behave the same way, and be as reliable (or un-reliable) first time or 
on a rehome.
If it really DOES make a difference, that starts to sound like a problem 
in the HAL driver.  Without enough tests, you might be throwing in a red 
herring on the first time vs. rehome thing.

Jon

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