7. POSITIONING CONTROL
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POINT
(1) Do not set the travel value to zero for fixed-pitch feed control.
The following results if the travel value is set to zero:
(a) If all three axes are set to zero, the fixed-pitch feed ends with no feed
taking place.
(b) If the travel value is set to zero for any of the 3-axes, fixed-pitch feed
control will not occur at the normal positioning speed for the axis or
axes set to a non-zero travel value.
[Program Example]
This program conducts fixed-pitch feed control using 3-axes linear interpolation
under the conditions below.
(1) System configuration
Fixed-pitch feed control using 3-axes linear interpolation of Axis, 1, Axis 2, and
Axis 3.
M M M M
A61P
A273UH
CPU
A278
LX
Axis
1
Axis
2
Axis
3
Axis
4
A61P
AX41
Start command (X000)
MR- -B
MR- -B MR- -B
MR- -B
(2) System configuration
(a) The positioning conditions are shown below.
Item Setting
Servo program number No. 320
Positioning speed 1000
Controlled axes Axis 1 Axis 2 Axis 3
Travel value 50000 40000 30000
(b) Fixed-pitch feed control start command....... leading edge of X000
(OFF → ON)
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