Fanuc Series 15i/150i-MA (Programming) Operators Manual

19.AXIS CONTROL FUNCTIONS PROGRAMMING B-63324EN/03
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Chopping is continued even when the mode is switched to the manual
mode or the automatic operation is halted by the feed hold function.
The chopping operation is stopped with the G80 command or a reset,
after which the tool returns to point R and then stops.
If an emergency stop or servo alarm occurs, the chopping operation
stops immediately.
- Chopping with the switch on the machine operator’s panel
Before starting chopping, set the chopping axis, reference position, top
dead point, bottom dead point, and chopping feedrate from the
parameter screen.
Refer to the manual provided by the machine tool builder for details.
- Feedrate up to point R
When chopping is started, the tool moves at the rapid traverse rate
(parameter No. 1420) up to point R.
The chopping feedrate override signal is enabled.
If, however, the chopping feedrate override is set to 100% or more, it is
clamped to 100%.
- Feedrate from point R
When chopping is started, the tool moves at the chopping feedrate
specified by the program or that specified for parameter No. 1195 from
point R until chopping is canceled. If the feedrate exceeds the
maximum chopping feedrate (parameter No. 1197), it is clamped to the
maximum chopping feedrate. If the maximum chopping feedrate is 0,
the chopping feedrate is clamped to the rapid traverse rate.
Overriding can be performed using the override switch dedicated to
chopping. Refer to the manual provided by the machine tool builder for
details.
- Setting chopping data
Set the following chopping data:
- Chopping axis: Parameter No.1191
- Reference point (point R) : Parameter No.1192
- Upper dead point: Parameter No.1193
- Lower dead point: Parameter No.1194
- Chopping feedrate: Parameter No.1195
- Maximum chopping feedrate: Parameter No.1197
- Changing chopping data
During chopping, point R, top dead point, bottom dead point, and
chopping feedrate can be changed. The chopping data set for
parameters is also changed.
- Chopping after the upper dead point or lower dead point has been changed
When the upper dead point or lower dead point is changed while
chopping is being performed, the tool moves to the position specified
by the old data. Then, chopping is continued using the new data.

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