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MDS-D-SVJ3/SPJ3 Series Instruction Manual
5-2 Adjustment procedures for each control
5-2-8 Deceleration coil changeover valid function by emergency stop
If a large workpiece is mounted on a large workpiece chuck in lathe, the acceleration/deceleration time
increases because of the increase of the total inertia. When the deceleration stop time at emergency stop
exceeds the upper limit value (29900ms) of the gate shutoff delay time (SP055), the spindle motor will coast.
This function enables the coil changeover motor to change to low-speed coil during emergency stop and if
the deceleration time is reduced to complete within the gate shutoff time, the spindle enters an emergency
stop state.
【#13225】 SP225 SFNC5 Spindle function 5
bit 8 : mken Coil switch allowance in deceleration control
This enables a coil changeover while decelerating after an emergency stop for a spindle motor with
coil changeover specification. A coil changeover may enable an excessive load inertia to stop within
the maximum delay time.
0: Normal (Disable) 1: Enable
【#13055】 SP055 EMGx Max. gate off delay time after emergency stop
Set the time required to forcibly execute READY OFF after the emergency stop is input.
Normally set to "20000".
When "0" is set, READY OFF is forcibly executed with "7000ms".
When the set time is shorter than the time to decelerate and stop, the spindle will stop with the
dynamic brake after the set time is out.
---Setting range---
0 to 29900 (ms)
【#13056】 SP056 EMGt Deceleration time constant at emergency stop
Set the time constant used for the deceleration control at emergency stop. Set the time required to
stop from the maximum motor speed (TSP).
When "0" is set, the deceleration control is executed with "7000ms".
---Setting range---
-29900 to 29900 (ms)
bit8=0
bit8=1
Coast
Max. delay time only
Max. delay time Coil changeover enabled
Low-speed coil
Emergency stop
High-speed
coil
Enable
Disable
After the elapse of maximum delay time,
the motor cannot stop but caost
Because of the changeover to high-speed coil,
deceleration finishes in time and the motor stops
Stop
Max. delay time
29900ms
Max. delay time
29900ms
Emergency stop
High-speed
coil
Low-speed coil
Low-speed coil
command
Low-speed coil
command
Deceleration
Deceleration
Deceleratie using
low-speed coil