Mitsubishi Electric MELSERVO-JN Series, Instruction Manual

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4. PARAMETERS
No. Symbol Name and function
Initial
value Setting
range
Unit
Control mode
Position
Internal
speed
Internal
torque
PC03 STC S-pattern acceleration/deceleration time constant
Used to smooth start/stop of the servo motor.
Set the time of the arc part for S-pattern acceleration/deceleration.
Set "0" to select the linear acceleration/deceleration.
Speed command
0r/min
STA
STC
Time
STC
STB
STC STC
Se
rv
o
mot
or
speed
STA: Acceleration time constant (parameter No. PC01)
STB: Deceleration time constant (parameter No. PC02)
STC: S-pattern acceleration/deceleration time constant
(parameter No. PC03)
Long setting of STA (acceleration time constant) or STB (deceleration
time constant) may produce an error in the time of the arc part for the
setting of the S-pattern acceleration/deceleration time constant.
The upper limit for the actual time of the arc part is as follows:
At acceleration: 2000000
STA , At deceleration:
2000000
STB
(Example) Settings of STA = 20000, STB = 5000 and STC = 200 limit
the actual arc part times as follows:
At acceleration: 100 [ms]
2000000
20000
Since
=100[ms]<200[ms],
the time is limited to 100[ms].
At deceleration: 200 [ms]
2000000
5000
Since
=400[ms]>200[ms],
the time is as-is.
0 0
to
1000
ms
PC04 TQC Torque command time constant
Used to set the constant of a low-pass filter in response to the internal
torque command.
TQC TQC
Time
Torque
Internal torque command
After filtered
TQC: Torque command time constant
0 0
to
20000
ms