
2.PREAPARATIONS FOR OPERATION B-63783EN-1/01
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NOTE
The overtravel amount of the motor after turning *IT
to "0" is represented by the following formula.
Qmax = Fm×1/60× (A/1000+Tc/1000+Ts/1000)
Qmax : Overtravel quantity (mm or inch)
Fm : Feedrate (mm/min or inch/min)
Tc : Cutting time constant (ms)
Ts : Servo time constant (Ts = 33ms normally)
A : Processing time of CNC
A = 50ms
When acceleration/deceleration before look-ahead
interpolation is used, the distance required for
deceleration based on acceleration/deceleration
before interpolation is added to the above formula.
Automatic operation all-axis interlock signal
*AIT<G001#0>
[Classification] Input signal
[Function] Disables feed for all controlled axes in automatic operation mode.
[Operation] While this signal is set to 0, feed for all controlled axes is disabled by
reducing the speeds specified for all axes involved in the automatic
operation to 0. Movement on an axis is decelerated and stopped. When
this signal is set to 1 again, the execution of all the move commands is
resumed. Manual operation is not affected by this signal. The M, S, T,
and B commands are handled in the same way as the all-axis interlock
signal. Commands other than move commands are not affected by this
signal.
Interlock signal for each axis
*IT1<G64#4>, *IT2< G68#4>, ...
[Classification] Input signal
[Function] Stops feed on each axis used for automatic or manual operation.
A separate interlock signal is provided for each controlled axis. The
number at the end of each signal name denotes the number of the
corresponding controlled axis.
*ITx
x : 1 ..... Interlock for the first axis
2 ..... Interlock for the second axis
3 ..... Interlock for the third axis
: :
: :
[Operation] (a) In manual operation (other than manual arbitrary direction feed)
The movement of an interlocked axis is inhibited, but the other
axes are movable. If an axis is interlocked during movement, it
stops after being decelerated, and it starts moving again when it is
released from interlock.