Examples of unrelated variables are:
47 Grind Seal Sensors 0=No
53 Password Needed 0=No
80 Cassette pitch inches
81 Wafers per Cassette
98 Vacuum Delays 0=No
Changing Machine Variable Names Made Easier
When a new software release introduces new machine variables, it has been necessary to enter each of those
names on the Machine Setup screen. There is a new stand-alone program named machvars that can be run
from the DOS command line to edit them all at once. This program rewrites all the names in the list but
leaves all the numeric values undisturbed. This command will be run automatically as part of the software
installation, but you may run it at any time if you have edited a name incorrectly and want to return to the
correct version.
Date and Time Added to the Fault Log
Each message in the fault log will be followed by the date and time when the fault occurred.
New Wheel Wear Messages
Additional messages are included to help the user identify different wheel wear situations. When the total
wheel wear has become too large, one of these messages will appear:
Coarse wheel wear limit. Notify Maintenance. Continue Grinding. (Target or Delta)
Fine wheel wear limit. Notify Maintenance. Continue Grinding. (Target or Delta)
Wheel wear over limits. Wait for Stop, then REPLACE COARSE WHEEL. (Force Grind)
Wheel wear over limits. Wait for Stop, then REPLACE FINE WHEEL. (Force Grind)
When the wheel wear per wafer has become too large, one of these messages will appear:
High coarse wheel wear on last wafer. Check and/or replace wheel.
High fine wheel wear on last wafer. Check and/or replace wheel.
GEM Changes
A previously unused GEM variable, ServoStatusB (VID 21), now provides the current bridge position in its
three low-order bits: Bit 2 = left; Bit 1 = center; Bit 0 = right.
A new GEM variable TIMEFORMAT (VID 141) is provided. It is a 1-byte integer with allowed values 0 or
1. If it is 0, GEM will accept date/time information in the form YYMMDDHHMMSS as it has done before.
If this variable is set to 1, GEM will accept date/time information in the form YYYYMMDDHHMMSSCC,
where the year is four digits and CC refers to centiseconds, or hundredths of seconds. Whichever way
TIMEFORMAT is set, GEM will always report the time using the format with the four-digit year.
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