Brake Models Fb-1D, Fb-2D, Fb-1E, Fb-1He, Fb-2E And Fb-3E - Sumitomo Hyponic 1120 Operating And Maintenance Manual

b) Manual brake release procedure
FB-01A1, FB-02A1, and FB-05A1 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 up and out from its holder and push it forward
towards the reducer. Releasing the lever will re-engage the brake.
4. Gap Inspection
The brake lining will wear after the unit has been used for a long period of time. Regularly check that gap G (Figure
15) is at an acceptable value. If the gap G become 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 cover (9).
b) Remove fan (12) by loosening set screw (10) (models FB-02A1 and FB-05A1).
c) Remove waterproof seal (16).
d) Insert a gap gage into the space between stationary core (1) and armature plate (3). Measure the gap size at
three appropriate circumferential points.
e) The gap needs to be adjusted if the values are close to the allowable limit listed in Table 11.
Table 11. Brake Gap Size
Gap value G, in. (mm)
Brake Type
Spec. value Allowable limit
FB-01A1
0.008 - 0.014
FB-02A1
(0.20 - 0.35)
FB-05A1
5. Gap Adjustment
If the brake lining is so heavily worn that gap adjustment is required, follow these steps:
a) Remove cover (9).
b) Remove fan (12) by loosening set screw (10) (models FB-02A1 and FB-05A1).
c) Remove waterproof seal (16).
d) Loosen restraining bolts (14), rotate the brake shoe completely counterclockwise, and re-tighten the restraining
bolts (14). After tightening the restraining bolts, measure the gap G to verify that it falls within the specification
value and the allowable limit shown in Table 10. (This procedure reduces the gap approximately 0.012 inch (0.30
mm).)
e) Check for brake performance by turning system power on and off a few times.
f) Reinstall waterproof seal (16) and fan(12).
g) Replace cover (9).
22 Hyponic® Operating and Maintenance Manual
0.02
(0.5)
Brake Models FB-1D, FB-2D, FB-1E, FB-1HE, FB-2E, and FB-3E
1. Standard Brakemotor Specifications
Table 12 lists the standard specifications for Models FB-1D, FB-2D, FB-1E, FB-1HE, FB-2E, FB-3E.
Table 12. Models FB-1D, FB-2D, FB-1E, FB-1HE, FB-2E, FB-3E Standard Specifications
Standard Brak-
Motor Capacity
Brake
ing Torque
Model
ft - lbs (N - m)
HP x 4P kW x 4P Standard Wiring
FB-1D 1/2 ~ 3/4 0.4 ~ 0.55 5.8 (7.5)
FB-2D 3/4 0.55 11 (15)
FB-1E 1 0.75 5.5 (7.5) 0.25 ~ 0.45
FB-1HE
1.5 1.1 8.0 (11) 0.45 ~ 0.65
FB-2E
2 1.5 11 (15) 0.35 ~ 0.55
FB-3E 3 2.2 16 (22) 0.75 ~ 0.95
Notes: Above table applies to standard brake specification under standard brake torque. Special brakes may perform differently from those shown. Initial
brake torque may be lower than specified brake torque. If this is the case, under light load start and stop the motor to wear-in the braking surface. To improve
performance for positioning accuracy or lifting applications, consider using fast braking action circuit. If the brake is operated at a rate greater than the Allowable
Brake Work Capacity, E0, the brake performance may degrade or become inoperable.
[1] Also applies to wiring where brake is powered separately from the motor leads.
2. Construction and Operating Principles
a) Construction
Figure 16 illustrates the construction of the brake. The restraining bolt (16) fastens the brake shoe (8), gap adjusting
shims (17) and spacer (18) onto the stationary core (1). The armature plate (4) is kept from rotation by the restraining
bolt (16) but moves axially by electromagnetic attraction and the tension of the pressure spring (2). The brake lining
(9) is fitted to the hub (11) which is secured to the motor shaft with a key. The solenoid coil (19) is energized via a
rectifier provided within the terminal box.
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Braking Delay Time (sec) Brake Work Capacity
Normal Braking Action
Fast Braking Allowable
[1] Action E (J/min)
Inverter Wiring
0
1620
0.2 ~ 0.3 0.1 ~ 0.15 0.01 ~ 0.02
2580
0.15 ~ 0.25 2580
0.25 ~ 0.35 0.01 ~ 0.03
3360
0.15 ~ 0.25
0.4 ~ 0.5 0.02 ~ 0.04 5720
Hyponic® Operating and Maintenance Manual
Gap Adjust Total
(x 10 7 J) E (x 10 7 J)
1
7.0 33.1
6.8 29.5
11.6 38.7
20.8 46.3
26.3 105.3
23