ThyssenKrupp TW63, Operating Manual

Page: 40 / 60

O
PERATING
M
ANUAL
TW63
M
AINTENANCE
/
SERVICE
ThyssenKrupp Aufzugswerke GmbH
7.5 Setting and checking the brake block stroke and armature base plate
Before first commissioning and during monitoring, the working stroke of the
brake blocks, the pretension of the brake springs and movement of the
armature base plates are to be checked.
Sequence:
1. Check ease of movement of the armature base plate:
After a longer period of use, it can occur that the rubber disc settles between
the armature base plate and brake (Fig. 7.4.1, Item 6). This means that the
pretension of the armature base plate becomes insufficient.
To restore the pretension, the lock nuts between the brake block and
armature base plate must be adjusted. Correct pretension is achieved when
the armature base plate can be turned on the armature screw despite light
suction.
2. Check the stroke:
Align a dial gauge on the brake block at the height of the centre of the brake
disc. Switch the drive to operate the brake block while checking the stroke of
the brake block. The path should be 0.3 mm + 0.1 mm.
Adjusting: If there are deviations, loosen the lock nuts (Fig. 7.4.1, Item 8)
and adjust the anchor bolt with an Allen key. Secure the setting.
Note: On opening the brakes, make sure that both brake blocks work with
the same stroke.
3 . Setting the initial tension of the springs:
A correct setting of the initial tension is only possible within the framework of
a deceleration measurement. The maximum pretension path of 13.5 mm
must not be exceeded.
Note: If brake test switches SA3 are fitted, they must be
checked or adjusted after a brake adjustment.
See SA3 brake monitoring circuit, chapter 8
40 09-2012