Mitsubishi Electric QD77MS User Manual page 47

(2) Deceleration stop
The output axis stops with deceleration according to the setting in "[Pr.37] Stop group 1
sudden stop selection" to "[Pr.39] Stop group 3 sudden stop selection". The
deceleration time is set in "[Pr.446] Synchronous control deceleration time" for
deceleration stop, and in "[Pr.36] Sudden stop deceleration time" for sudden stop. The
slope of deceleration is as follows.
Slope of deceleration
The cam axis current value per cycle is not updated, and only the feed current value is
updated, since the deceleration stop begins. Therefore, the path of the feed current
value is drawn regardless the cam operation with deceleration stop.
The input axis must be stopped when the output axis is stop synchronizing with the
input axis.
Md.407 Cam axis current
value per cycle
Md.20 Feed current value
(Cam operation)
Md.22 Feedrate
Cd.380 Synchronous control
start (Target axis bit)
Axis stop signal
BUSY signal
= "[Pr.8] Speed limit value"
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Chapter1 Outline of Synchronous Control
Deceleration time
/
(Sudden stop deceleration time)
Deceleration stop
t
t
t