Mitsubishi Electric MDS-D-SPJ3 Specification Manual page 107

MITSUBISHI CNC
4 Characteristics
(2) Coasting rotation distance during emergency stop
The distance that the motor coasts (angle for rotary axis) when stopping with the dynamic brakes can be
approximated with the following expression.
L
MAX
F
N
J
M
J
L
t
e
A
B
Emergency stop (EMG)
Dynamic brake control output
Actual dynamic brake operation
4 - 14
: Motor coasting distance (angle)
: Axis feedrate
: Motor speed
: Motor inertia
: Motor shaft conversion load inertia
: Brake drive relay delay time
: Coefficient A (Refer to the next page)
: Coefficient B (Refer to the next page)
OFF
ON
OFF
ON
OFF
ON
Motor speed
N
Dynamic brake braking diagram
Coasting amount calculation coefficients table
2
Motor type
JM (kg•cm )
HF75 2.6
HF105 5.1
HF54 6.1
HF104 11.9
HF154 17.8
HF224 23.7
HF204 38.3
HF354 75.0
HF123 11.9
HF223 23.7
HF303 75.0
HF142 17.8
HF302 75.0
HF-KP13 0.88
HF-KP23 0.23
HF-KP43 0.42
HF-KP73 1.43
[mm, (deg)]
[mm/min, (deg/min)]
[r/min]
2
[kg•cm ]
2
[kg•cm ]
[s] (Normally, 0.03s)
Coasting amount
t
e
A B
-9 -3
0.41×10 20.66×10
-9 -3
0.31×10 29.01×10
-9 -3
2.85×10 30.40×10
-9 -3
2.82×10 4.57×10
-9 -3
2.34×10 5.06×10
-9 -3
1.98×10 6.44×10
-9 -3
6.78×10 7.75×10
-9 -3
4.09×10 10.11×10
-9 -3
3.78×10 3.57×10
-9 -3
3.02×10 4.27×10
-9 -3
7.82×10 7.10×10
-9 -3
5.04×10 2.76×10
-9 -3
11.23×10 5.29×10
-9 -3
0.25×10 3.12×10
-9 -3
0.41×10 2.47×10
-9 -3
0.39×10 1.39×10
-9 -3
0.27×10 17.43×10
Time