Richard

  I never saw one AOI machine, but my experience in placement machines allow
me the following comment :

  Machines that works with axis generaly has a hardware zero location, one
sensor that indicates to machine the reference point for coordinate system.
At other end of the axis could have others sensors that indicates too close
of the end of the axis ( warming sensor) and the sensor that indicates that
the end of the axis was achieved ( this sensor normally shut down servo
motor power ) and after this sensor is a crash absorber device to stop the
inertia of the axis when failures happens.
  Another feature is the software limits that are set up in machines, these
limits are programed to prevent axis travel in outside range areas, normally
before the sensors.
  So try to check both : software limit and hardware sensor
  Be aware of changing zero reference sensor, because ALL previous programs
will change since they were based on the last reference.

I hope this help

Jorge Dourado de Santana
Maintenance / Process Engr
Microtec - Brazil





> -----Original Message-----
> From: Richard Mark Mazzoli [SMTP:[log in to unmask]]
> Sent: 20 de Dezembro de 1999 19:39
> To:   [log in to unmask]
> Subject:      [TN] Any AOI experts on today?
>
> Hey folks,
>
> I need some help with an Error Code 15 on an Orbotech PC1450.  The error
> indicates the Y axis table limits are too close to the table edge.  Is it
> possible that the table limits were changed in the program?  Any idea on
> how to fix it?
>
> Thanks
>
> JR
> AIT-Atlanta
>
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