
B-63943EN-1/02 2.PREPARATIONS FOR OPERATION
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NOTE
The overtravel distance of the motor after turning
*IT to "0" is represented by the following formula.
Where
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 read-ahead
interpolation is used, the distance required for
deceleration using acceleration/deceleration before
interpolation is added to the above formula.
Interlock signal for each axis*IT1 to *IT8<G130>
[Classification] Input signal
[Function] These signals disable feed along axes on an axis-by-axis basis.
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.
*IT x
x : 1 ..... Interlock for the first axis
2 ..... Interlock for the second axis
3 ..... Interlock for the third axis
: :
[Operation]
a) In manual operation
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.
b) In automatic operation (MEM RMT or MDI mode)
If an axis is interlocked while its movement is being commanded
(the move amount is not 0, inclusive of the tool offset),
movement in all axes is prevented.
If a moving axis is interlocked, all axes stop moving after being
decelerated, and they start moving again when interlock is
released.
This function is also effective during dry run.
Interlock signal for each axis direction
(M series) +MIT1 to +MIT8<Gn132>,-MIT1 to -MIT8<Gn134>
(T series) +MIT1<X004#2>,-MIT1<X004#3>,+MIT2<X004#4>,-MIT2<X004#5>
[Classification] Input signal
[Function] An axis direction interlock can be applied for each axis.