Mitsubishi Electric QD77MS User Manual page 171

Current value after composite main shaft gear when starting synchronous control
The current value after composite main shaft gear is restored as follows according to the
main input axis operation executed before starting synchronous control.
Operation of main input axis
(Before synchronous control start)
OPR
Current value change
(Note-1)
Speed control
Fixed-feed control
Speed-position switching control
(Note-1)
Position-speed switching control
(Note-1)
Connection to servo amplifier
Connection to synchronous
encoder
Others
(Note-1): When "[Pr.300] Servo input axis type" is either "1: Feed current value" or "2: Real current value", and
when "[Pr.21] Feed current value during speed control" is "2: Clear feed current value to zero" only.
Restoration method 1): The new current value after composite main shaft gear is
Current value
after composite =
main shaft gear
Restoration method 2): The travel value of the main input axis from the last synchronous
Current value
after composite =
main shaft gear
The current value after composite main shaft gear at the last synchronous control session
is restored when "0: Invalid" is set in "[Pr.400] Main input axis No.", or when a servo input
axis or a synchronous encoder axis as the main input axis is not connected.
REMARK
"The last synchronous control session" indicates status just before the last
synchronous control session was stopped as follows. These are listed with the last
synchronization status.
• Just before "[Cd.380] Synchronous control start" turns from ON to OFF.
• Just before deceleration stop by a stop command or an error, etc.
• Just before the system's power supply turned OFF to the Simple Motion module.
Chapter 5 Synchronous Control Initial Position
Servo input axis
Absolute position
detection system valid
Restoration method 1)
Restoration method 1)
Restoration method 1)
Restoration method 1)
Restoration method 1)
Restoration method 1)
Restoration method 2)
Restoration method 2)
calculated based on the current value of the main input axis.
Main input direction of
composite main shaft gear
control session is reflected to the current value after composite
main shaft gear.
Current value after
composite main
Main input direction of
shaft gear at the +
composite main shaft gear
last synchronous
control session
5 - 3
Absolute position
detection system invalid
Restoration method 1)
—
Main input axis
current value
Synchronous
encoder axis
—
Restoration method 1)
—
—
—
—
—
Restoration method 1)
Restoration method 2)
Amount of change
of main input axis
current value from
the last
synchronous
control session