30
Hyponic®
Operating and Maintenance Manual
Hyponic® Operating and Maintenance Manual
31
www.SumitomoDrive.com
When the power is disconnected, the solenoid coil and electric motor are not energized. This causes the pressure
spring (2) to actuate the armature plate (4), which in turn presses the brake lining (9) against the brake shoe (8) and
brings the motor to a quick stop.
a) At regular intervals, check that:
•
the unit is operating normally.
•
the brake lining is not excessively worn (or gap G is normal).
•
all the mounting screws are securely tightened.
b) Manual brake release procedure
FB-5E, FB-8E, FB-10E, and FB-15E brakemotors are equipped with a one-touch release mechanism. To manually
release the brake with power to the unit turned off, pull the brake release lever out from its holder and push it forward
toward the reducer. Releasing the lever will re-engage the brake.
3. Inspection
The brake lining will wear after the unit has been used for a long period of time. Regularly check that gap G
(Figures
17-a and 17-b)
is at an acceptable value. If gap G becomes too large, the solenoid coil may fail to pull in the armature
plate, and hence cannot release the brake, resulting in the unit remaining in a continuously braked condition. Follow
these steps to inspect the brake gap:
a)
Remove shifting pin (5) and brake release lever (6).
b)
Remove cover (13).
c)
Remove fan (15) by removing retaining ring (14).
d)
Remove waterproof seal (26).
e)
Insert a gap gage into the space between the stationary core (1) and armature plate (4). Measure the gap size at
three appropriate circumferential points.
f)
Check for brake performance by turning system power on and off a few times.
g)
The gap needs to be adjusted if the values are close to the allowable limit listed in
Table 16
.
4. Gap Inspection
Table 16. Brake Gap Size
Brake Type
Gap value G, in. (
mm
)
Spec. value
Allowable limit
FB-5E, FB-8E
0.014 - 0.017
(0.35 - 0.45)
0.040
(1.0)
FB-10E, FB-15E
0.047
(1.2)
If the brake lining is so heavily worn that gap adjustment is required, follow these steps:
a)
Remove shifting pins (5) and brake release lever (6).
b)
Remove the cover (13). Remove fan (15) by removing retaining ring (14). Remove V-Ring (24) waterproof seal
(26) and waterproof cover (25).
c)
Insert a gap gage into the space between the stationary core (1) and armature plate (4) and rotate the nut (16) at
the tip of the stud bolt (19) clockwise until the gap measures an appropriate size. If the gap is too large to adjust
by this procedure, decrease the number of adjusting washers (18) in use. Evenly adjust the three nuts (16) until
the gaps at the three circumferential points are equal and fall within the specification range shown in
Table 16
.
d)
After completing the gap adjustment, turn the system power on and off a few times to check the brake
performance.
e)
Replace waterproof cover (25), waterproof seal (26), V-Ring (23), fan (15), retaining ring (14), cover (13), shifting
pins (5), and brake release lever (6).
5. Gap Adjustment
Follow these steps to replace the brake lining when its thickness has reached the allowable limit shown in
Table 17
,
or when sleeve adjustment is no longer an effective means of gap adjustment:
a)
Remove shifting pins (5) and brake release lever (6).
b)
Remove the cover (13). Remove fan (15) by retaining ring (14). Remove V-Ring (24) waterproof seal (26) and
waterproof cover (25).
c)
Remove all three nuts (16)
d)
Remove the brake shoe (8) and take out the brake lining (9).
e)
Fix the leaf spring (10) as shown in
Figure 18
.
f)
Apply a small amount of grease along the spline of the new brake lining (9), taking care not to apply any to the
wear surface.
g)
Fit the new brake lining (9) onto the hub (11) and check that it moves smoothly. Remove any excess grease.
h)
After reassembling the brake, measure gap G. If the gap is out of the specification range, adjust by rotating the
gap adjusting nut (16).
i)
Turn the system power on and off a few times to check the brake performance. If no abnormalities are detected,
replace the fan (15), retaining ring (14) and cover (13).
j)
Measure gap G. Readjust if the gap is not within the specification value range.
k)
Turn the system power on and off a few times to check the brake performance. If no abnormalities are detected,
replace waterproof cover (25), waterproof seal (26), V-Ring (24), fan (15), retaining ring (14), cover (13), shifting
pins (5) and brake release lever (6).
6. Brake Lining Replacement
Table 17. Brake Lining Size
Fig. 18 Leaf Spring
Brake Type
Brake lining
dimension
Initial Thickness
t
0
, in.
(mm)
Allowable Thickness
t
0
, in.
(mm)
FB-5E, FB-8E
0.394
(10.0)
0.236
(6.0)
FB-10E, FB-15E
0.433
(11.0)
0.276
(7.0)
Leaf Spring
