What Is The Synchronous Control; Synchronous Control Modules - Mitsubishi Electric FATEC MELSEC iQ-R Training Manual

Chapter 7 Advanced Synchronous Control Practice
7.1

What is the Synchronous Control?

"Synchronous control" can be achieved using software instead of controlling mechanically
with gear, shaft, speed change gear or cam, etc.
"Synchronous control" synchronizes movement with the input axis (servo input axis or
synchronous encoder axis), by setting "parameters for synchronous control" and starting
synchronous control on each output axis.
7.1.1

Synchronous control modules

The module is used in synchronous control as follows.
Input axis module
Synchronous encoder
axis parameters
Synchronous encoder axis
Servo input axis
parameters
Servo input axis
POINT
• Input axis module can be set to one of servo input axis or synchronous encoder axis.
• Speed change gear can be arranged on one of main shaft side, auxiliary shaft side or after
composite auxiliary shaft gear.
• Set the travel value of input axis module so large as possible to prevent the speed fluctuation of
output axis module in the synchronous control. If the travel value of input axis module is small,
the speed fluctuation of output axis module may occur depending on the setting for
synchronous parameter.
• The following items can be monitored using the simple motion module setting Function; each
synchronous control monitor data and the rotation direction of main shaft main input axis, main
shaft sub input axis, auxiliary shaft axis, and output axis (cam axis feed current value).
Synchronous parameters
Main shaft module
Input axis Main shaft
(Main shaft main) composite gear
Input axis
(Main shaft sub)
Auxiliary Auxiliary
shaft gear shaft clutch
Auxiliary shaft
Auxiliary axis module
Main shaft
gear
Main shaft
clutch
Auxiliary
shaft
composite
gear
Speed
Speed
change
change
gear module
gear
Output axis
module
Cam
Output axis
7-1
Cam data