WITTUR WSG-25, Руководство по эксплуатации

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Commissioning and operation
INTORQ | BA 14.0201 | 04/2016 26
6.1.2 Microswitch
These spring-applied brakes are equipped with two microswitches. One microswitch is for release monitoring
and one is for wear monitoring (see Figure 1). The microswitches are either connected in series (NC con-
tacts, black and grey wire strands) or in parallel as NO contacts (black and blue wire strands).
Checking the release control
Fig. 9 Release monitoring
Check the setting of the microswitch for release monitoring using a feeler gauge with thickness "Y
max
and
Y
min
" between hexagon head cap screw (1) and microswitch tappet (2).
NOTICE
Each of the two microswitches should be checked for correct operation when the brake is
applied (not actuated). During the check, the other microswitch must not be actuated.
NOTICE
The brake is deenergized, the transport screws are removed.
1 Hexagon head screw 2 Microswitch tappet
Feeler gauge thickness NC contact N/O contact
Y
max.
= s
L
- 0.10
Switch open Switch closed
Y
min.
= s
L
- 0.25
Switch closed Switch open
Commissioning and operation
INTORQ | BA 14.0201 | 04/2016 27
Checking the wear monitoring
Fig. 10 Wear monitoring
1. Measure the air gap "s
L
" between brake disc (1) and friction linings (2) using a feeler gauge (with brake
energized, refer to 25).
2. Switch off the voltage supply
3. Calculate the thickness "X" of the feeler gauge: 0.75 - "s
L
" = X
4. Insert a feeler gauge of thickness "X" between microswitch tappet (3) and friction lining carrier (2) (with
brake deenergized). The feeler gauge must lie flat. The switch must be actuated.
5. Use a feeler gauge with a thickness lower by 0.05 mm and check if the switch remains in the original
switch position. The feeler gauge must lie flat.
6.1.3 Test that the manual release functions
1 Brake disc 2 Friction lining 3 Microswitch tappet
NOTICE
This operational test is to be carried out additionally!
DANGER
The drive system must be free of loads. The motor must not run!
NOTICE
When the maximum permissible working air gap "s
Lmax
" ( 14) is exceeded during brake
operation, the braking torque is considerably reduced by the manual release. Proper brake
function is no longer ensured.