
11.CONTROL FUNCTIONS B-63662EN/01
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(1) Detectors on the controlled axes can be incremental and/or
absolute pulse coders (APC). The two types can be intermixed.
(2) Any axis from the fourth axis to the eight axis can be assigned as
the U-axis.
(3) A U-axis move command is generated based on the movement
distance of an axis that can change the optical path length. So, it
is necessary to specify controlled axes (except the U-axis) that
can change the optical path length, using parameters.
(4) If the movement direction of an axis that can change the optical
path length does not match the polarity of a change in the optical
path length, the polarity may be inverted for calculation
purposes.
(5) A parameter can specify whether to reflect the amount of
movement of an axis under tracing control into the U-axis move
command.
(6) Optical path length compensation is possible.
When all axes (including the U-axis) are at their reference points,
the optical path length is defined as the reference optical path
length, which can be subjected to compensation.
When optical path length compensation is enabled, the reference
optical path length can be set up regardless of the position of the
reference point.
If a parameter specifies a mirror position compensation value,
turning on the constant-optical path length control start signal
(LRCS) with all axes set at their reference points causes the U-
axis to move automatically through the specified distance away
from its reference point and to begin optical path length
compensation.
For an APC axis, if its reference point has been set up, the
constant-optical path length control start signal is accepted even
if the axis is not at the reference point.
(7) The distance through which the U-axis should move is calculated
as follows:
∆U = (64 / Parameter No. 15705) (±∆X, ±∆Y, ±∆Z, . . .)
where ∆U, ∆X, ∆Y, ∆Z ... : Move command value for each axis