S-Pattern Acceleration/Deceleration Time Constant [G] [Wg] - Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual

S-pattern acceleration/deceleration time constant [G] [WG]

This function is available on servo amplifiers with firmware version A5 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.
Setting speed
Servo motor speed
0 [r/min]
Ta + S-pattern acceleration/deceleration time constant
Ta: Acceleration time
Tb: Deceleration time
• 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.
• If the S-pattern acceleration/deceleration time constants are set to values of 1000 ms or more in the profile
position mode, the value is clamped to 1000 ms.
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 Symbol
parameter
PT51 STC
3 BASIC FUNCTION
140
3.18 Acceleration/deceleration function
Ta
Name
S-pattern acceleration/
deceleration time constant
Tb
Tb + S-pattern acceleration/deceleration time constant
Outline
Set the S-pattern acceleration/deceleration time constant.
Initial value: 0 [ms]