Automatic Operation Mode - Mitsubishi Electric MR-JE-*C Instruction Manual

12. WHEN USING WITH A GENERAL-PURPOSE INTERFACE
No. Start-up sequence
5 Gain adjustment Rotation ripples (speed
fluctuations) are large
at low speed.
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
Note. Refer to "MELSERVO-JE Servo Amplifier Instruction Manual (Troubleshooting)" for details of alarms and warnings.

12.6.2 Automatic operation mode

(1) Automatic operation mode
(a) Logic of indexer
The positioning is executed like this. A station, which one of the divided circumference (360 degrees)
into 255 at most on the machine side, is selected by using 8-bit devices of the next DI0 (Next station
selection 1) to DI7 (Next station selection 8). The following diagram is an example for when [Pr.
PA14] is set to "0".
CW direction
Station No. 2
Station No. 1
The station No. 0 is set as a home position. The number of divisions is set with [Pr. PT28].
Fault
Make gain adjustment in the
following procedure.
1. Increase the auto tuning
response level.
2. Repeat acceleration and
deceleration several times to
complete auto tuning.
If the servo motor can be run
safely, repeat acceleration and
deceleration three times or more to
complete auto tuning.
POINT
In the absolute position detection system, there are the following restrictions on
[Pr. PA06 Number of gear teeth on machine side] and the servo motor speed
(N).
When CMX ≤ 2000, N < 3076.7 r/min
When CMX > 2000, N < 3276.7 - CMX r/min
When the servo motor is continuously operating at a servo motor speed higher
than the limit value, [AL. E3 Absolute position counter warning] occurs.
When the same next station No. is specified as station No. of the current
position, and the positioning operation is executed, the motor does not start
because the travel distance is determined as "0".
Station No. 253
Station No. 254
Station No. 0
Investigation
Gain adjustment fault
Gain adjustment fault
12 - 76
Possible cause Reference
MR-JE-_C
Chapter 6
MR-JE-_C
Chapter 6