3 BASIC FUNCTION
3.14 Acceleration/deceleration function
101
3
S-pattern acceleration/deceleration time constant
This time constant is available on servo amplifiers with firmware version B2 or later.
Setting S-pattern acceleration/deceleration time constant enables smooth start/stop of the servo motor.
This function operates when [Pr. PT51 S-pattern acceleration/deceleration time constants] is set.
• This function is enabled in the profile position mode and profile velocity mode.
• This function is disabled when [Pr. PT51] is set to "0".
• This function is disabled in the homing mode.
Precautions
• If the setting of acceleration or deceleration time is too long, the timing error may occur on the arc part against the setting of
the S-pattern acceleration/deceleration time constant.
• If the S-pattern acceleration/deceleration time constant is set longer than the constant speed time, the speed may not reach
the command speed.
• The upper time limit on the arc part of the S-pattern acceleration/deceleration is limited by the acceleration time and
deceleration time. Refer to [Pr. PT51] for details.
Setting method
Servo
parameter
Symbol
Name
Outline
PT51
STC
S-pattern acceleration/deceleration time
constant
Set the S-pattern acceleration/deceleration time constant.
Initial value: 0 [ms]
0 [r/min]
Ta
Tb
Setting speed
Ta + S-pattern acceleration/deceleration time constant
Ta: Acceleration time
Tb: Deceleration time
Tb + S-pattern acceleration/deceleration time constant
Servo motor speed
Summary of Contents for MELSERVO-JET MR-JET-G-N1 Series
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