Mitsubishi Electric 800 Series Instruction Manual (Function page 168

 Example of positioning operation by point tables (automatic continuous
positioning operation)
The following figure shows an operation example using the following point tables.
Target position
Point table
Upper Lower
1 2 0
2 1 0
3 0 5000
Position command
speed
0.05s
(Pr.1222)
0
Target position
Servo ON
(LX)
STF
*2
ON
STR
*2
RM
*1
RL
*1
RH
*1
ON
Y36
ON
*1 Turn ON the start signal 5 ms or more after the point table selection signal is turned ON.
*2 After the start signal is turned ON, the ON state should be retained for 20 ms or longer.
NOTE
• During continuous operation, the position command speed drops to 0 in each point table operation before starting the next
point table operation.
• During continuous operation, no point table selection signal is received. Select the position feed length using point table before
turning ON the start command.
 Return to home position during point table positioning
• Home position return is performed to match the command coordinates with the machine coordinates. Position control with
an absolute position cannot be performed until the home position is set.
• The returned home position can be set as point 0, and positioning operation is available using this point.
• Perform the home position return when the position command data and the current position data are within the range from
-2147483648 to 2147483647.
 Home position return procedure
1.
Set parameters related to home position return.
• Set the home position return method (Pr.1282).
• Set the home position return speed (Pr.1283)
• Set the home position return shifting speed (Pr.511)
• Set the home position return shift amount if necessary. (Pr.1286 × 10000 + Pr.1285).
2.
Turn OFF the JOG signal and all point table selection signals.
• Turn OFF the RH, RM, RL and JOG signals.
3.
Turn ON the Pre-excitation/servo ON (LX) signal.
Maximum Acceleration
speed (Hz) time (s)
100.00 0.05
50.00 0.10
25.00 0.20
Point table 1
Point table 2
100.00Hz(Pr.4)
50.00Ｈz(Pr.5)
0.05s
(Pr.1223)
0.10s
(Pr.1226)
20000 30000(+10000)
ON
Deceleration
Auxiliary function
time (s)
1 (absolute position,
0.05
continuous)
11 (incremental position,
0.10
continuous)
10 (incremental position,
0.20
individual)
Point table 3
25.00Hz(Pr.6)
0.10s 0.20s 0.20s
(Pr.1227) (Pr.1230) (Pr.1231)
35000(+5000)
ON
7.3 Simple positioning function by point tables
Point table 3
(Pr.1230) (Pr.1231)
0.20s 0.20s
Time
-25.00Hz(Pr.6)
30000(-5000)
ON
ON
ON
7. Position Control
1
2
3
4
5
6
7
8
9
10
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