Mitsubishi Electric 800 Series Instruction Manual page 215

Position control under vector control
Example 1 of positioning operation by point tables (automatic
continuous positioning operation)
The figure below shows an operation example when the following settings are made for point tables.
Target position
Point
table
Upper Lower
1 100 0
2 50 0
Position command
speed
5s
(Pr.1222)
0
Target position
Servo ON
(LX)
STF
RH
NOTE
• During continuous operation, the operation moves on to the next table after the position command speed becomes 0.
• During continuous operation, no point table selection signal is received. Select the position feed length by point tables before
turning ON the start command. Only the maximum frequency can be changed during operation. Position feed length cannot
be switched.
Example 2 of positioning operation by point tables (automatic
continuous positioning operation using the point table selected at the
start of the operation)
The following figure shows a loop operation example using the point table 2 to point table 4 in the following point table. The
operation is started from the point table 2 (start point). Set "12" in the auxiliary function of the point table 4 (end point).
Point Target Maximum
table position speed (Hz)
1 50000 60
2 70000 20
3 100000 10
4 60000 5

The positioning operation is repeated. To stop the operation, turn OFF the STF (STR) signal, or turn ON the X87 (sudden stop) input signal.
Operation
(1) The operation is started using the point table 2 (start point).
(2) The operation is switched to use the point table 3.
(3) The operation is switched to use the point table 4 (end point).
(4) According to the setting in the auxiliary function for the point table 4 (Pr.1237="12"), the operation is switched to use the
point table 2 selected at the start (loops back the start point from the end point).
(5) Steps (1) to (4) are repeated.
Position command
speed
Point table
No.2
20Hz
0
Position feed
70000
length
0
Servo ON
(LX)
STF
RM
ON
214
PARAMETERS
Maximum Acceleration
speed (Hz) time (s)
60 5
30 6
Point table 1 Point table 2
60Hz(Pr.4)
30Hz(Pr.5)
5s
(Pr.1223)
6s
(Pr.1226)
Dwell time (Pr.1224)
1000000
ON
ON
ON
Acceleration Deceleration
time (s)
1 1
2 2
4 4
3 3
Point table Point table
No.3 No.4
10Hz
5Hz
30000 60000
100000 160000
70000
ON
ON
Deceleration Dwell time
time (s)
5 1000
6 0
6s
(Pr.1227)
Time
500000
Dwell time
time (s) (ms)

100
100
100
100
Point table Point table Point table
No.2 No.3
20Hz
10Hz
70000 -130000
230000 100000
Auxiliary function
(ms)
1 (absolute position, continuous)
10 (incremental position, individual)
Auxiliary function
1 (absolute position, continuous)
11 (incremental position, individual)
1 (absolute position, continuous)
12 (incremental position, individual)
Point table Point table
No.4 No.2 No.3
20Hz
5Hz
10Hz
60000 70000 -130000
160000 230000
Time
100000