Instruction manual

9 - 2
9. CHARACTERISTICS
9.2 Dynamic Brake Characteristics
Use the next equation to calculate an approximate coasting distance to a stop when the dynamic brake is
operated.
Lmax
V
0
{0.03 + M (A + B V
0
2
)}
Lmax : Machine coasting distance [m]
V
0
: Brake time speed [m/s]
M : Movable part total mass [kg]
A : Coefficient (according to the table below)
B : Coefficient (according to the table below)
Linear servo motor Coefficient A Coefficient B Linear servo motor Coefficient A Coefficient B
LM-H2P1A-06M 2.91 10
-2
8.44 10
-3
LM-U2P2B-40M 1.38 10
-3
1.37 10
-5
LM-H2P2A-12M 1.01 10
-2
5.71 10
-3
LM-U2P2C-60M 1.04 10
-3
8.19 10
-6
LM-H2P2B-24M 3.14 10
-2
7.26 10
-4
LM-U2P2D-80M 8.60 10
-4
5.63 10
-6
LM-H2P2C-36M 1.57 10
-3
4.16 10
-4
LM-H2P2D-48M 1.28 10
-3
3.16 10
-4
LM-H2P3A-24M 3.28 10
-2
7.59 10
-4
LM-H2P3B-48M 1.12 10
-3
2.72 10
-4
LM-H2P3C-72M 9.05 10
-4
1.50 10
-4
LM-H2P3D-96M 8.01 10
-4
1.20 10
-4
CAUTION
The coasting distance is a theoretically calculated value which ignores the running
load such as friction. The calculated value is considered to be longer than it really
is. However, if a sufficient braking distance is not obtained when some margin is
allowed, it may result in crashing into the stroke edge, which is highly dangerous.
Install the anti-crash mechanism such as an air brake or an electric/mechanical
stopper such as a shock absorber to reduce the shock of movable parts. No linear
servo motor with an electromagnetic brake is available.