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5 Spindle Adjustment
MITSUBISHI CNC
Relation between SP071 (variable current limit during deceleration, lower limit value) and
SP072 (variable current limit during deceleration, break point speed)
【#13071】 SP071 DIQM Variable current limit during deceleration, lower limit value
Set this parameter to adjust the deceleration time by changing the current limit value during
deceleration depending on the motor speed.
As shown below, set the lower limit rate of the current limit in SP071 (DIQM), and use with SP072
(DIQN).
When DIQM is set to 100%, the current limit value in deceleration (TMRL) set in the motor constants
is applied.
---Setting range---
0 to 999 (%)
【#13072】 SP072 DIQN Variable current limit during deceleration, break point speed
Set this parameter to adjust the deceleration time by changing the current limit value during
deceleration depending on the motor speed.
As shown below, set the lower limit rate of the current limit in SP071 (DIQM), and use with SP072
(DIQN).
When DIQM is set to 100%, the current limit value in deceleration (TMRL) set in the motor constants
is applied.
---Setting range---
1 to 32767 (r/min)
100
SP072
SP071
0
0
<1>
<2>
SP072
SP026
<1> SP152(SP184)×SP071/100
<2> SP152(SP184)
0
Current limit
Motor rotation speed
Max. rotation speed
Decreasing current value
”100” is the setting value for the current limit
during regeneration (SP152 (high-speed coil),
SP184 (low speed coil)).
(1) Rotation speed – Decreasing current value curve
Time
(
s
)
Motor rotation speed
Deceleration time
q axis command/FB
(2) Rotation speed/current command FB waveform
DIQN
0
DIQM
100%
(TMLR)
Motor speed
DIQN
0
DIQM
100%
(TMLR)
Motor speed