Mitsubishi Electric CNC Specifications And Instruction Manual page 50

Direct Drive Motor Specifications and Instruction Manual
3 Characteristics
(2) Coasting rotation distance during emergency stop
The angle that the motor coasts when stopping with the dynamic brakes can be approximated with the following
expression.
F
t
L { +
e
MAX
60
L
MAX
F
N
J
M
J
L
t
e
A
B
Emergency stop (EMG)
Dynamic brake control output
Actual dynamic brake operation
< MDS-E and MDS-D2 Series >
TM-RBP012C20
TM-RBP036E20
TM-RBP048G20
TM-RBP105G10
TM-RBP105G20
TM-RBP150G20
TM-RBP340J20
TM-RBP500J20
< MDS-EJ and MDS-DJ Series >
TM-RBP012C20
TM-RBP036E20
TM-RBP048G20
TM-RBP105G10
J
L
A N 2 B }
1
J
M
: Motor coasting angle
: Axis feedrate
: Motor speed
: Rotor inertia
: Motor shaft conversion load inertia
: Brake drive relay delay time
: Coefficient A (Refer to the following table)
: Coefficient B (Refer to the following table)
OFF
ON
OFF
ON
OFF
ON
Motor speed
N
Dynamic brake braking diagram
Coasting amount calculation coefficients table
-4
Motor type
J (×10 kg•m
M
22
127
280
393
395
510
2778
3538
Coasting amount calculation coefficients table
-4
Motor type
J (×10 kg•m
M
22
127
280
395
[deg]
[deg/min]
[r/min]
-4
[×10 kg•m
-4
[×10 kg•m
[s] (Normally, 0.03s)
Coasting amount
t
e
2
A
)
-9
3.51×10 7.62×10
-9
7.64×10 9.51×10
-9
27.79×10 9.30×10
-9
33.49×10 6.16×10
-9
28.73×10 7.74×10
-9
24.73×10 7.59×10
-9
28.41×10 20.58×10
-9
35.06×10 15.89×10
2
A
)
-9
3.31×10 8.09×10
-9
6.89×10 10.55×10
-9
24.43×10 10.59×10
-9
21.67×10 9.62×10
25
2
]
2
]
Time
B
-3
-3
-3
-3
-3
-3
-3
-3
B
-3
-3
-3
-3
IB-1501068-C