6. Workpiece coordinate system shift
Manual intervention, machine lock, or mirror imaging may
shift the workpiece coordinate system. Before attempting
to operate the machine under the control of a program,
confirm the coordinate system carefully.
If the machine is operated under the control of a program
without making allowances for any shift in the workpiece
coordinate system, the machine may behave
unexpectedly, possibly damaging the tool, the machine
itself, the workpiece, or causing injury to the operator.
7. Software operator’s panel and menu switches
Using the software operator’s panel and menu switches,
in combination with the MDI panel, it is possible to specify
operations not supported by the machine operator’s
panel, such as mode change, override value change, and
jog feed commands.
Note, however, that if the MDI panel keys are operated
inadvertently, the machine may behave unexpectedly,
possibly damaging the tool, the machine itself, the
workpiece, or causing injury to the user.
8. Manual intervention
If manual intervention is performed during programmed
operation of the machine, the tool path may vary when the
machine is restarted. Before restarting the machine after
manual intervention, therefore, confirm the settings of the
manual absolute switches, parameters, and
absolute/incremental command mode.
9. Feed hold, override, and single block
The feed hold, feedrate override, and single block
functions can be disabled using custom macro system
variable #3004. Be careful when operating the machine
in this case.
10. Dry run
Usually, a dry run is used to confirm the operation of the
machine. During a dry run, the machine operates at dry
run speed, which differs from the corresponding
programmed feedrate. Note that the dry run speed may
sometimes be higher than the programmed feed rate.
11. Program editing
If the machine is stopped, after which the machining
program is edited (modification, insertion, or deletion), the
machine may behave unexpectedly if machining is
resumed under the control of that program. Basically, do
not modify, insert, or delete commands from a machining
program while it is in use.