Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 348

7. PARAMETERS
No./ Setting
symbol/name digit
PC02 Set a deceleration time constant for the automatic operation of the indexer method.
STB Set a deceleration time from the rated speed to 0 r/min.
Deceleration Additionally, when 20000 ms or more value is set, it will be clamped to 20000 ms.
time constant
1
Setting range: 0 to 50000
PC03 This enables to start/stop the servo motor or linear servo motor smoothly.
*STC Set the time of the arc part for S-pattern acceleration/deceleration.
S-pattern Setting "0" will make it linear acceleration/deceleration.
acceleration/
Servo is usually operated with linear acceleration and deceleration; however, smooth
deceleration
start and stop are enabled by setting [Pr. PC03 S-pattern acceleration/deceleration
time constant
time constants]. When the S-pattern acceleration/deceleration time constants are set,
smooth positioning is enabled as shown in the following figure. Note that when it is set,
a time period from the start to output of MEND (Travel completion) is longer by the
S-pattern acceleration/deceleration time constants.
Rated speed
Preset speed
Servo motor
speed
0 [r/min]
When the STC value is set longer than the constant speed time, the speed may not
reach to the command speed.
Additionally, when a value of 1000 ms or more is set, it will be clamped to 1000 ms.
Setting range: 0 to 5000
PC05 Set a positioning speed for the automatic operation speed 1, 2 of the indexer method.
SC1
Automatic
operation
speed 1 Setting range: 0 to permissible instantaneous speed
PC06 Set a positioning speed for the automatic operation speed 1, 2 of the indexer method.
SC2
Automatic
operation
speed 2 Setting range: 0 to permissible instantaneous speed
PC07 Set a JOG speed of the manual operation mode, JOG operation, and home position
return mode of the indexer method.
SC3
Manual
operation
speed 1 Setting range: 0 to permissible instantaneous speed
Function
Acceleration Deceleration
time constant time constant
Ta
Ta + STC
7 - 43
www.kavrammuhendislik.com.tr
Ta: Time until preset
speed is reached
Tb: Time until stop
Tb + STC
Tb
Control mode
Initial
value
[unit]
0
[ms]
0
[ms]
100
[r/min]
500
[r/min]
1000
[r/min]