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

S-pattern acceleration/deceleration time constant [G]

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, profile velocity mode, point table mode, and JOG
operation mode.
• This function is disabled when [Pr. PT51] is set to "0".
• In the point table mode and JOG operation mode, the time from start to output of MEND (traveling
completion) becomes longer by the set amount of S-pattern acceleration/deceleration time constant.
• 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, point table mode, and JOG operation 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
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]
3.20 Acceleration/deceleration function [G] [A]
3 BASIC FUNCTION
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