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7. POSITIONING CONTROL
[Program Example]
PLC ready (M2000)
All axes servo start command
(M2042)
All axes servo start accept frag
(M2049)
Start command (X000)
SVST instruction
Axis 4 start accept flag
(M2004)
End command (X001)
This program conducts repeated 1-axis fixed-pitch feed control under the
conditions below.
(1) System configuration
Fixed-pitch feed control of Axis 4.
A61P A273UH
CPU
MR- -B MR- -B MR- -B MR- -B
Axis
1
M
(2) Fixed-pitch feed control conditions
(a) The positioning conditions are shown below.
Item
Servo program number
Controlled axis
Control speed
Travel value
(b) Fixed-pitch feed control start command ...........leading edge of X000 (OFF→ ON)
(c) Fixed-pitch feed control end command ......leading edge of X001
(3) Operation timing
The operation timing for fixed-pitch feed control is shown below.
V
10000
A278
A61P AX41
LX
Axis
Axis
Axis
4
2
3
M
M
M
Setting
No. 300
Axis 4
10000
100000
Servo program No.300
1 second
1 second
7 − 52
Start command (X000)
(OFF→ON)
t
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