Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 127

2) Adjustment procedure
(Note) Refer to the following flow chart for the procedure to change the SP087 and SP088
settings. (SP088 does not require changing.)
Adjust the deceleration time to the same time as the acceleration time using SP087.
Set the initial values SP087 = 75
and SP088 = 3000 (Note 1)
Measure the acceleration/
deceleration waveform at the
max. spindle speed command.
1.1Ta < Td?
N
0.95Ta < Td?
N
Measure the acceleration/
deceleration waveform at the
max. spindle speed command.
Y
Determine SP087 at this time
< Reference > Variable current loop gain adjustment
SP067 (VIGWA) : Change start speed (r/min)
SP068 (VIGWB) : Change finish speed (r/min)
SP068 (VIGWB) : Set the magnification of the current loop gain (torque amount or excitation
(Note) Refer to the following as a guideline for setting SP067 to SP069.
Max. motor
speed
SP017 (TSP)
0 ~ 6000
6001 ~ 8000
8001 or more
Observe the following when carrying out the settings above:
1) If there is a slight hunting (high frequency vibration) during operation at the max. speed, lower
SP068 in -8 increments to a setting where no problem occurs.
2) If there is a slight swelling (low frequency vibration) during operation at the max. speed, raise
SP068 in +8 increments to a setting where no problem occurs.
3) If "OVERCURRENT ALARM 32" or "OVERVOLTAGE ALARM 33" occurs when decelerating
from the max. speed, the current loop gain in the high-speed region is probably insufficient.
Raise SP068 in +16 increments to a setting where no problem occurs.
8. Adjustment Procedure
Measure with H gear in
machines with gears.
Use CN3 speed meter
output for measurement.
Y
SP087 (+5)
Measure the acceleration/
deceleration waveform at the
max. spindle speed command.
1.1Ta > Td?
Y
N
SP087 (−5)
0.95Ta > Td?
N
amount). The magnification is 1-fold when this is set to 0. (The magnification
becomes 1 when this setting value is 16.)
SP067 SP068
(VIGWA) (VIGWB)
0 0
5000 8000
5000 10000
Torque limit
(Note 1) Set the standard SP087 and SP088
settings for the SJ-PF Series Motor as
follows:
Y
• SP088 = "Fixed output max. speed/1.2"
• SP087 ≤ SP088 x 75/max. speed
Example)
SJ-PF2.2-01 → SP087=35, SP088=5000
SJ-PF7.5-01 → SP087=45, SP088=5000
SJ-PF11-01 → SP087=45, SP088=3750
SP069
SP069×(1/16)-fold
(VIGN)
0
45
64
8 − 8
Inverse proportion
speed
Speed
Speed meter
Gain
1-fold
Speed