Mitsubishi Electric MR-J4-_GF Instruction Manual page 174

7. PARAMETERS
No./symbol/
Setting
name digit
PT51 This parameter is used to smooth start/stop of the servo motor or linear servo motor.
STC Set the time of the arc part for S-pattern acceleration/deceleration.
S-pattern Setting "0" will make it linear acceleration/deceleration.
acceleration/d
eceleration
time constant
The actual operation time for the arc part is limited as shown by the following
calculations. Thus, if a large value is set to STA (acceleration time constant) or STB
(deceleration time constant), the actual operation time for the arc part may differ from the
setting value of the S-pattern acceleration deceleration time constant. The setting will be
disabled during home position return.
When a value exceeding 1000 ms is set, the parameter value will be clamped to 1000
ms.
The upper limit value of the actual time for the arc part is limited by
2000000
(Example) At the setting of STA = 20000, STB = 5000 and STC = 200, the actual times
Setting range: 0 to 5000
PT65 Set the Jog speed command.
PVC If a value smaller than "1.00" is set, the servo motor may not rotate.
Jog speed
command
Setting range: 0.00 to instantaneous permissible speed
Acceleration time
constant
Rated speed
Preset speed
Servo motor
speed
0 [r/min]
Ta
Ta + STC
for acceleration and by
STA
for the arc part are as follows:
During acceleration: 100 ms
2000000
= 100 [ms] < 200 [ms]
20000
Therefore, it will be limited to 100 [ms].
During deceleration: 200 ms
2000000
= 400 [ms] > 200 [ms]
5000
Therefore, it will be 200 [ms] as you set.
Function
Deceleration time
constant
Tb + STC
Tb
2000000
for deceleration.
STB
7 - 25
Initial
value
[unit]
[ms]
Ta: Time until preset
speed is reached
Tb: Time until stop
100.00
[r/min]/
[mm/s]
Control
mode
C P
P S
0