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MDS-D-SVJ3/SPJ3 Series Instruction Manual
5-2 Adjustment procedures for each control
(3) Adjustment when the load inertia is large
When the load inertia is large and acceleration time is 10s or more, excessive speed deviation alarm
(ALM23) may occur because the time in which deviation between speed command and speed FB,
which is the actual spindle motor rotation speed, exists is prolonged. In this case, increase the time
constant (3101 to 3104) during spindle rotation by S command. When the acceleration time is 10s or
less, use the standard value 300 (300ms).
Alarm can be avoided by adjusting excessive speed deviation timer (SP117). However, in this case,
alarm detection will be delayed during constant speed operation.
In order to improve current ripple waveforms during acceleration/deceleration, adjust by using speed
command dual cushion explained later.
【#13117】 SP117 SETM Excessive speed deviation timer
Set the time to detect the speed excessive error alarm.
Set the time required to the machine.
The standard setting is "12".
---Setting range---
0 to 60 (s)
【#3101】 sp_t 1 Time constant for spindle rotation with S command (Gear: 00)
Set the acceleration/deceleration time constant for spindle rotation using the S command (spindle
control mode = speed operation mode) with gear 00 (Linear acceleration/deceleration pattern).
---Setting range---
0 to 30000 (ms)
【#3102】 sp_t 2 Time constant for spindle rotation with S command (Gear: 01)
Set the acceleration/deceleration time constant for spindle rotation using the S command (spindle
control mode = speed operation mode) with gear 01 (Linear acceleration/deceleration pattern).
---Setting range---
0 to 30000 (ms)
【#3103】 sp_t 3 Time constant for spindle rotation with S command (Gear: 10)
Set the acceleration/deceleration time constant for spindle rotation using the S command (spindle
control mode = speed operation mode) with gear 10 (Linear acceleration/deceleration pattern).
---Setting range---
0 to 30000 (ms)
【#3104】 sp_t 4 Time constant for spindle rotation with S command (Gear: 11)
Set the acceleration/deceleration time constant for spindle rotation using the S command (spindle
control mode = speed operation mode) with gear11 (Linear acceleration/deceleration pattern).
---Setting range---
0 to 30000 (ms)