
4. REFERENCE POSITION ESTABLISHMENT
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The function is available for only FS16i/18i/21i–MB,18i–MB5.
When the function is applied for simple synchronous axis, the following
condition should be kept.
(1)Linear scale I/F with absolute address referenced mark (A/B phase)
with the same reference marks at intervals should be applied for the
master axis and the slave axis.
(2)The master axis scale and the slave axis scale should be installed in
parallel direction. (The zero positions should be faced the same
direction.)
(3)To the parameters, which relates to this function (except No.1883,
No.1884), the same value must be set for the master axis and for the
slave axis.
(4)During operating the establishment of reference position, the state of
selecting the manual feed axis for simple synchronous control signals
(SYNCJn<G0140>) should be kept.
Procedure for Reference Position Establishment by synchronous axis is
as follows.
– When either reference mark of the master axis or the slave axis is
detected, the both axes stop. And the both axes are fed again at a
Reference Position Return FL Feedrate.
– The above mentioned operations are repeated until the master axis and
the slave axis detect enough (3 or 4) reference marks.
– Absolute position of both axes are calculated and Reference Position
Establishment Signal (ZRF1,ZRF2,...) turns to ”1”.
(Example of 3 points measurement system)
Scale end
Start point End point
Reference mark
Master axis
Slave axis
(a) (b) (c)
(1) (2) (3)
In the above example, the following sequence is executed.
a. When the reference mark (1) of the master axis is detected, both master
axis and slave axis stop.
b. Both the axes begin to move again at a Reference Position Return FL
feedrate.
c. When the reference mark (a) of the slave axis is detected, both axes
stop again.
d. Both the axes begin to move again at FL feedrate.
e. Both axes repeat the operation until all point ((2) → (b) → (3) → (c))
are detected.
f. When the slave axis detects the third reference mark (c), both the axes
end the Reference Position Establishment.
Simple synchronous
axis