On Tue, Apr 12, 2011 at 11:23:22AM -0500, Jon Elson wrote:

> What is the following error tolerance in the .ini file?  If it was an 
> encoder or encoder counter problem, it should cause a sudden following 
> error of .4", which would be expected to trip the error message and stop 
> the machine.  


I agree with this IF the error happens all at once and IF the ferror
limits are set to a reasonable number.

If the error happens gradually (1 or 4 counts per servo cycle is
gradual to EMC but pretty darn fast to a human) it would probably not
ferror.

Stuart, assuming you are homing to index, you can detect even one lost
encoder count.  Home the machine and note axis.1.motor-offset.  Then
move Y around or run a program, possibly losing or gaining one or more
encoder counts.  Then home the axis again and check that
axis.1.motor-offset is still the same number.  If not, the change in
motor-offset is the *distance* lost or gained.

------------------------------------------------------------------------------
Forrester Wave Report - Recovery time is now measured in hours and minutes
not days. Key insights are discussed in the 2010 Forrester Wave Report as
part of an in-depth evaluation of disaster recovery service providers.
Forrester found the best-in-class provider in terms of services and vision.
Read this report now!  http://p.sf.net/sfu/ibm-webcastpromo
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users

Reply via email to