Mitsubishi Electric Melservo-J3 Series MR-J3-B, Instruction Manual

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16. INDEXER POSITIONING OPERATION
16.7 Automatic operation mode
POINT
In the absolute position detection system, the following restriction condition
applies for the number of gears on machine-side (parameter No.PA06 CMX)
and 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 operated at servo motor speed higher than the limit
value, the absolute position counter warning (AE3) occurs.
16.7.1 What is automatic operation mode?
(1) Concept of indexer
Select the station, which is dividing the circumference (360 degrees) of the machine side into up to 255,
using 8-bit device of the next station selection 1 to 8 (RYnA to RYnE, and RY(n 2)3 to RY(n 2)5), and
execute positioning.
CW direction
Station No.2
Station No.1
Station No.0
Station No.254
Station No.253
Station No.0 is the set home position. Set the number of stations in the parameter No.PC46.
(2) Rotation direction
There are two types of operation methods: Rotation direction specifying indexer, which is to always rotate in
the fixed direction and execute positioning to a station, and Shortest rotating indexer, which is to
automatically change the rotation direction for the shortest distance and execute positioning to a station.
Rotation direction specifying indexer Shortest rotating indexer