Yaskawa Yasnac PC NC - Manual (Page 46)

YASNAC PC NC Operating Manual Chapter 2: PC NC System Outline
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2.7.3 Dry Run
When automatic mode operation (TAPE, MEM, MD1) is executed with the DRY RUN switch
set ON, feedrates specified in a program are disregarded and axis move commands are executed
at the feedrate set with the JOG FEEDRATE switch. Since the F code specified in a program is
displayed during the execution of a program, the program can be checked efficiently by using this
function.
Feedrate to be used in positioning (G00) can be selected from the rapid traverse rate or jog feed-
rate according to the setting for parameter pm2000 D0 as indicated in Table 2.7.3.1.
Table 2.7.3.1 Rapid Traverse in Dry Run
1. When the setting of the DRY RUN switch is changed during automatic operation, the
new setting becomes valid immediately. However, if it is changed while axis movement
is controlled in the “mm/rev” mode” or during the execution of a tapping cycle, the new
setting becomes valid after the completion of the presently executed block.
2. In the dry run mode, the setting of the RAPID ‘TRAVERSE RATE OVERRIDE switch
is valid for rapid traverse operation.
2.7.4 Display Lock and Machine Lock
The DISPLAY LOCK/MACHINE LOCK switch allows the program to be executed in the
following manner – to operate the machine with the present position data fixed, or to execute the
program to update the present position data without actually operating the machine. The switch
can be operated only while the operation is stopped in the block stop or feed hold state.
(1) DISPLAY LOCK/MACHINE LOCK Switch OFF
Select this position for normal manual or automatic operation. Both the machine and the
position data are operated and updated according to the execution of the commands in the
program.
(2) In the DISPLAY LOCK Position
The displayed position data are not updated even when the axis are moved. This position
should be selected when the display data should not include the distance of shift.
Parameter pm2000 D0 G00 in Dry Run
“0” Rapid traverse rate
“1” Jog feedrate set with JOG FEEDRATE switch