Brake(0.75～2.2Kw) - Mitsubishi Electric Super Helicross Series Instruction Manual

10. Brake（0.75～2.2kW）
1) Structure and operation
Fig. 9 shows the structure of the brake. The non-excitation braking method (spring-driven braking method) is used for all the models
2) Gap adjustment procedure (Refer to the structural drawing of the brake (Fig.9).
If the brake is abraded due to long use, the gap between the field core and Armature will be
larger than the limit gap specified in Table 5. Such a large gap may cause a braking operation
error or brake releasing error. For this reason, if the gap is larger than the limit gap, adjust the
Step １ gap by following the procedure below.
Loosen the fan cover clamp screws (4 screws), and then remove the fan cover.
The fan is fixed by hexagon socket head set screws. Remove the fan and End-face
Step ２ Inside the brake cover, loosen 3 locknuts(item 4), and then equally adjust the V seal(Outdoor type), and then loosen the screws (item 3) to remove the brake
cover (item 1).
gap(A) between the field core and Armature to the initial gap (refer to Table 5) by
Step ３ Use the specified thickness gauge (initial thickness gauge) to measure the gap. If
tightening the outer hexagon nut(item 5).
the lower limit thickness gauge can be inserted into the gap but the upper limit
thickness gauge cannot be inserted into the gap at any point around the cores,
Step ４ Tighten 3 locknuts(item 4)
judge that gap is properly adjusted.
Step ５ Finally check the gap(A) in the same way as step 3.
Step ６ Attach the brake cover, and then tighten the screws (item 3) through the flat
washers (item 2).
Notes: To adjust the gap, observe the following items.
After adjusting the gap, be sure to tighten al the nuts.
After tightening the locknuts (item 4) at step 4, the gap may be slightly changed. For
this reason, be sure to check the gap at step 5.
Adjust the gap so that the gap difference (difference between the maximum gap and
minimum gap) is reduced to 0.05 mm or less.
Periodically check the gap.
Be careful not to damage the O-ring (item 6) during adjustment. The waterproofing or
soundproofing function may be deteriorated.
If the thickness of the brake lining is reduced to the limit value specified in Table5,
replace the lining.
Fig.9
－ 11 －
Item DESCRIPTION
1 Brake cover
2 Flat washer
3 screw
4 Locknut
Ｏ-ring
5 Hexagon nut
6
7 Fan cover
8 Clamp screw
9 Field core
10 Armature
11 Brake lining
12 Side plate
13 End-face V seal
(Outdoor type)