cemp DB 30 - Adjusting the Air Gap Motors 63÷160

29
ENGLISH
Table 4A - Adjusting the braking torque
Frame
size
Brake
type
A
0
[mm]
Braking torque [Nm] for A =
A
0
A
0
+1mm A
0
+2mm A
0
+3mm A
0
+4mm A
0
+5mm A
0
+6mm
63
AC1 0 4,5 --- --- --- --- --- ---
71
MEC 63 14 9,0 6,0 3,0 --- --- --- ---
80
T80 12 17,0 13,5 10,0 6,5 --- --- ---
90
MEC80 18 35,0 32,0 29,5 27,0 24,0 21,5 18,5
100
MEC90(
◆
)
17 48,0 42,0 36,0 30,0 24,0 18,0 12,0
112
MEC100(
◆
)
20 70,0 57,0 44,5 32,0 19,0 --- ---
132
MEC112(
◆
)
23 90,0 77,0 63,0 49,0 35,5 21,5 ---
160
T140(
◆
)
23 130,0 110,0 90,0 70,0 55,0 35,0 ---
A
0
= distance for the standard braking torque value
(
◆
) = 2 braking disks available on request
The recommended air gap, with a tolerance of ± 0,05
mm is shown in table 4B.
The air gap Y (fig. 2C and 2D) is the gap between
the faces of the electro-magnet and the mobile arma-
ture, when the brake is not powered (motor brake on).
This value must be adjusted when, due to wear on
the brake disc friction material, the air gap increases
beyond the values shown in table 4B, affecting the
brake’s performance.
The maximum acceptable air gap under maximum
torque conditions is 0,7 mm.
Table 4B - Recommended air gap
For size 71÷160 motors (fig. 2C) the air gap is
adjusted by turning the nuts
fk A and fk B to move
the electro-magnet to the original gap from the
mobile armature.
For size 63 motors (fig. 2D) the air gap is adjusted by
turning the fixing screws es after having slackened
the adjustment nuts fk A. Once the required gap has
been set, the adjustment nuts must be tightened
against the single unit.
Before carrying out this operation make sure that
the brake casing has not overheated.
Failure to adjust the air gap may result in the
brake not opening properly, which in turn results
in the motor and the brake heating up.
For motors with a manual release, if the air gap
exceeds the maximum value, rotating the release
spanner may not be sufficient to adequately
release the brake.
Frame
size
Brake
type
Air gap
[mm]
63
AC1 0,2
71
MEC 63 0,3
80
T80 0,3
90
MEC80 0,3
100
MEC90 0,3
112
MEC100 0,3
132
MEC112 0,5
160
T140 0,3
4.4 Adjusting the air gap
motors 63÷160