5. TOOL FUNCTION (T FUNCTION)
Although the turret axis control has been described in detail up to this
point, the following is included in the description:
The above explanation shows only one example. For example, in the case
of mechanical clamping, the machine side should judge that no clamping
can be carried out for some reason and should also carry out some
countermeasures for it.
The machine side should perform confirmation, judge to see if it is proper
to carry out clamping, or perform some countermeasures, assuming that
the position cannot be mechanically clamped for some reason (in general,
shot pins cannot be inserted) when the turret axis was positioned at the
location set in the tool registration screen for example, the commanded
T code beforehand.
There is no problem even if the following conditions should occur as far
as the machine side can perform the above confirmation.
Namely, when the T05 is commanded and turret indexing is performed
while the T01 tools are being selected, the turret axis reduces its speed and
stops and the axis moving signal MVT of the turret axis is turned to 0 at
the same time the deceleration is terminated if the automatic operation
stop signal *SP is turned to 0 during turret axis positioning.
Afterwards, in–position signal INPT of the turret axis is turned to 1 and
becomes the automatic operation stop state.
Even if signal MVT is 0 and INPT is 1, the following results if the
machine side judges whether shot pins can be inserted or not:
Namely, clamping by shot pins can be done if shot pins can be inserted
and no clamping can be done if shot pins cannot be inserted.
When signal *SP is turned to 1 and automatic operation is restarted by
cycle start, the turret axis can be positioned at the commanded T05
location and the T05 tools can be selected.
The following turret indexing completion signal TIE was added for
reducing processing at the machine side.
In other words, signal TIE is 0 when the turret axis movement is started
(including when interlock is applied to the axis movement with interlock
signal *ITT of the turret axis set to 0), and it is 1 only when the positioning
of the turret axis to the instructed T code is completed. Consequently, if
it is confirmed that signal MVT is 0, signal INPT is 1 and signal TIE is
1, and the turret is clamped by a shot pin, it is not necessary to check
whether it is a position in which to clamp at the machine side.
1 When turret indexing for an instructed T code is over, signal
TIE is turned to 1; however the transmission timing is at the
moment when deceleration begins. The turret must be
neither clamped nor released from clamping, therefore,
using a shot pin, etc. merely on receiving the signal TIE. The
conditions of signals MVT and INPT must be applied.
2 After emergency stop or the servo alarm is released after
power on, the TIE signal remains 0 until manual reference
position return of the turret axis is completed, and the
machine position of the turret axis is established.
(Output) TIE <F236#6>