
B-63783EN-1/01 1.AXIS CONTROL
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Parameter
- Setting data (parameter)
When set for tandem control axes, the parameters to be set for each axis
are divided into three types:
(1) Parameters in which the same data must be set for the master axis
and slave axis
(2) Parameters that must be set for the master axis only (Parameters,
if set for the slave axis, are not used.)
(3) Parameters in which different data may be set for the master axis
and slave axis
The classification of parameters is detailed later. In general, a
parameter that does not fall into these types must be assumed to be a
parameter of type (1), and the same data must be set for the master axis
and slave axis.
CAUTION
If different data is set for the master axis and slave
axis in a parameter of type (1), tandem control does
not function normally.
- Depending on the rotation directions of the master axis and slave
axis, care must be taken in specifying the following two servo
parameters:
Parameter No. 1879 Motor rotation direction
Parameter No. 1980 Preload value
In parameter No. 1879, specify the positive direction (111) or
negative direction (-111) as required.
When specifying parameter No. 1980, use the same sign if the
rotation direction of the master axis is opposite to that of the slave
axis, and use the opposite sign if the rotation direction of the
master axis is the same as that of the slave axis.
- When a separate pulse coder is used, the master axis must be set to
use the separate pulse coder, and the slave axis must be set to use
the built-in pulse coder. Care must be taken in specifying the
following parameters:
Bit 1 of parameter No. 1815 Separate pulse coder
Bits 6 to 4 of parameter No. 1816 Detection multiplier (DMR)
Parameter No. 1891 Number of position detection feedback
pulses (PPLS)
Parameter No. 1896 Arbitrary reference counter size
Parameter No. 1977 Flexible feed gear numerator
Parameter No. 1978 Flexible feed gear denominator
For example, suppose that a motor with a serial A pulse coder is used
together with a linear scale for 1µm position detection, and that the
amount of machine travel per motor revolution is 4 mm. Then:
Master axis Slave axis
No.1815#1
10
No.1816
01110000 01110000
No.1891
4000 12500
No.1896
4000 4000
No.1977
04
No.1978
0 1000