Mitsubishi Electric E70 Series, Instruction Manual

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E70 Series Instruction Manual
7.2 Chuck Barrier/Tailstock Barrier (L System)
II - 67
7.2.3 Restrictions
(1) There is only one checkpoint from the tool regarding the chuck barrier/tailstock barrier. Therefore, the following
cautions must be observed.
In the following examples, when the barrier points are set to be checked by the hypothetical tool nose point and the
tool moves in the direction of the arrow in the drawing, the following situation may occur.
In Example 1, there is a checkpoint in the range "a", so the tool will automatically stop at the barrier boundary.
However, in Example 2 there is a checkpoint in range "b", so the chuck and tool may collide in range "a".
To avoid this, Example 3 is given. In this example, if the barrier points P1, P2 and P3 are set and the checkpoint is
set in range "c", the tool can be stopped at the barrier boundary.
(2) When the tool enters the barrier region and an alarm occurs, the tool may move in the opposite direction from which
it came, once the alarm is canceled by resetting.
(3) There is no barrier region for axes without a reference position return function. Thus, there is no barrier alarm for
that axis.
(4) When the tool enters a canceled barrier region, and that barrier is then validated, an alarm will result immediately if
the tool is moved.
If the alarm is canceled with reset in this manner, invalidate the barrier (G23) before escaping or change the value
set for each barrier point.
(5) The soft limit is valid even if the barrier is invalid (G23)
(Example 1)
(a)
(Example 2)
(a)
(b)
(Example 3)
(c)
P1
P2
P3