YASKAWA yasnac i80m Instruction Manual page 650

3.6
VARIOUS OPERATIONS AND FUNCTIONS
(Cont'd)
In order
to restore
the processing
conditions of suspended operation
. to
restart,
options are prepared for the search for
a
specified
sequence
number.
. Nevertheless, some of the program
commands require extra care.
The details are explained in the following
:
(a)
The
program restart
position is generated in NC. Therefore, axes are
regarded as moving according
to
the NC program during
search for the
restart
position.
Automatic reference
point
return
.((*28), reference
point
return
check
(G27).
return
from reference
point
return
(G29), second
to
fourth
reference
point
return (G30),
machine coordinate
system
(G53).
(b).
There
are commands that perform different operations depending on
input signals. Some such input
signals retain the status they had when
the
program
restart
search
was
started. Others are completely disregard¬
ed.
(
i
)
Signals
that retain
status at
search
start
Mirror image
(M95. M94.)
block delete, machine lock, manual absolute. Fl-digit selection
(
ii ) Signals that are disregarded .
Feed hold, single-block, auxiliary function lock, skip, program interrupt
(M91, M90.)
optional
stop
The skip signal is assumed being input.
(c)
Some commands
cannot
be executed
as programmed
because the
spe¬
cial operation mode is impossible.
(
i
)
Solid
tap.(M93)
When restarted,
the G74 and G84
commands in the solid
tap
mode
(M93)
are replaced with normal tapping.
(
ii
)
High-speed cutting
commands (HON, HOF)
When restarted. HON and HOF commands in the
HON mode are
replaced with normal
text
operations.
....
-
/
(iii) Fl-digit .command
Processing can be restarted'
at
the speed according
tolthe
Fl-digit
command,
except
that acceleration and deceleration of handle
opera¬
tion requires new Fl-digit
commands.-
(iv)Tool life
control
=
Before restarting operation
in the tool life
control mode, the life
control
group must
be specified.
-
The
group
is indicated
by
command T code in the'
program restart
data.
/
.
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