amount of time the grind, dress, or true will be allowed to continue during an interruption to the coolant
flow. This variable is a four-digit number, similar to the six-digit number in variable 98 for vacuum delays.
The first digit tells how many seconds to allow during the approach to the wafer on the left work chuck. The
second digit tells how many seconds to allow during actual grinding on the left work chuck, beginning from
the end of the approach until the grind wheel lifts up at the end of the grind. The third and fourth digits give
the same information for the right work chuck. None of these four digits is allowed to be zero, unless all are
zero. Zero will be interpreted to allow 5 seconds in all cases.
If any of these timers is exceeded, the grind or dress or true will be aborted. However, a momentary
interruption that does not exceed the timer value will be allowed. The recommended value is 3131, allowing
three seconds of interruption during the approach but only one second during the grind.
Messages at End of Grind Cycle
Customers have requested fewer messages at the end of the Grind Cycle and Dress Cycle. The message
“Cycle Done. Press Stop.” has been removed.
Another New Feature
A new DOS command called ALPHABET is supplied. It can be used to alphabetize some or all the files in a
directory. It was originally written to allow the grinding recipes to be alphabetized so that they will appear in
the correct order in the list box from which a recipe is selected.
To use this command to alphabetize grinding recipes, exit to DOS and enter the command: alphabet *.wfr
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