
B-64663EN/01 LASER FUNCTION 8.CONTROL FUNCTION
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Move command calculation and setting
The amount of U-axis movement is calculated as follows:
∆Z...)∆Y ∆X(
15705 No.Parameter
64
∆U ±±±=
∆U, ∆X, ∆Y, ∆Z... : Move command value for each axis
The U-axis is defined only for the machine coordinate system, which
is updated according to the above calculation.
For axes not specified in parameter No. 15700, the move command
value is assumed to be 0 for calculation purposes. For axes on which
polarity inversion is specified in parameter No. 15701, the algebraic
sign is inverted for calculation purposes. Parameter No. 15705
specifies the ratio of the move distance of an axis on which the optical
path length varies to the distance traveled by the U-axis to resume the
original optical path length.
Activation of optical path length compensation
Optical path length compensation should be activated according to the
following procedure.
1 After the U-axis and all axes selected in parameter No. 15700
(described later) have returned to the reference position, select
the job mode, and set the optical path length compensation start
signal (LRCS) to "1", and optical path length compensation will
begin.
If an APC is used, it is unnecessary to execute a reference
position return for axes for which the reference position has been
established.
2 The optical path length compensation signal (LRCS) is
acceptable only in the jog mode. A ladder program should set the
LRCS signal to "1" after the jog mode is securely selected.
3 The CNC monitors the optical path length compensation start
signal (LRCS) for both its rising and steady states. So, this signal
should stay at "1" as long as optical path length compensation is
being carried out.
4 When optical path length compensation begins, the optical path
length compensation signal (LCIN) becomes "1".
5 Whatever the current operation mode is, optical path length
compensation is stopped when the optical path length
compensation start signal (LRCS) becomes "0".
Optical path length compensation stop
If an emergency stop, servo-off, or U-axis overtravel occurs, the CNC
judges that optical path length compensation cannot continue. The
CNC also sets the coptical path length compensation stop request
signal (CSTP) to "1" and posts it to the PMC.