Acceleration/Deceleration Function; Acceleration/Deceleration Time Constant - Mitsubishi Electric MELSERVO-J5 Series User Manual

3.18

Acceleration/deceleration function

This function enables smooth acceleration/deceleration. The following methods are available for the acceleration/deceleration
function.
• [G] [WG]
Item Explanation
Acceleration/deceleration This is a method for performing acceleration/deceleration in accordance with the specified
time constant method acceleration/deceleration time constants [ms].
Set [Pr. PT01.1 Speed/acceleration/deceleration unit selection] to "0" to enable this method.
Acceleration/deceleration This is a method for performing acceleration/deceleration in accordance with the specified
*1
method acceleration/deceleration [command unit/s
Using this method together with S-pattern acceleration/deceleration time constant enables
smoother acceleration/deceleration.
Set [Pr. PT01.1 Speed/acceleration/deceleration unit selection] to "1" to enable this method.
*1 Available on servo amplifiers with firmware version A5 or later.
• [A]
Item Explanation
Acceleration/deceleration This is a method for performing acceleration/deceleration in accordance with the specified
time constant method acceleration/deceleration time constants [ms].
Using this method together with S-pattern acceleration/deceleration time constant [ms]
enables smoother acceleration/deceleration.

Acceleration/deceleration time constant

The acceleration/deceleration time constant is the period of time taken to reach the rated speed from 0 [r/min (0 [mm/s]) or to
reach 0 [r/min] (0 [mm/s]) from the rated speed for the commands or limits. The control mode influences whether the
acceleration/deceleration time constant is set in the servo parameters, objects, or other settable areas.
[Setting example]
For a servo motor with a rated speed of 3000 [r/min], set 3 [s] to accelerate from 0 [r/min] to 1000 [r/min] in 1 [s].
Servo motor speed
Rated speed
0 r/min
(0 mm/s)
Setting value of
acceleration time constant
Precautions
• Refer to the different servo parameters, objects, and other settable areas in each control mode.
2
].
If the preset command speed is lower than the rated speed,
the acceleration/deceleration time will be shorter.
Time
Setting value of
deceleration time constant
Reference
Page 143 Acceleration/
deceleration time constant
Page 145 S-pattern
acceleration/deceleration time
constant [G] [WG]
Page 145 S-pattern
acceleration/deceleration time
constant [G] [WG]
Page 147 Acceleration/
deceleration [G] [WG]
Reference
Page 143 Acceleration/
deceleration time constant
Page 146 S-pattern
acceleration/deceleration time
constant [A]
3 BASIC FUNCTION
3.18 Acceleration/deceleration function
3
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