Wittur WSG-21.2 Serie Instrucciones De Funcionamiento página 51

Installation and Operational Instructions for
®
ROBA -diskstop
Application
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 ROBA -diskstop for use as a holding brake with
occasional EMERGENCY STOP braking actions
 The max. permitted peripheral speed and friction work (see
Technical Data) must be observed.
Design
® ®
The ROBA -diskstop is a spring applied, electromagnetically
releasing safety brake - a component in terms of DIN VDE 0580.
It is designed for installation into gearless elevator machinery for
use as a holding brake with occasional EMERGENCY STOP
braking actions.
On dimensioning, the braking torque, the speed as well as the
permitted friction work in case of EMERGENCY STOP need to
be taken into consideration for safe holding of the load torque
and safe compliance with the required braking distance.
®
Furthermore, the ROBA -diskstop
device acting on the shaft of the traction sheave, as part of the
protection device against overspeed for the car moving in
upwards direction and as a braking element against unintended
car movement.
For a dual-circuit brake system, at least two brakes are
necessary.
Please also observe the Annex in the EU Type Examination
Certificate.
In order to guarantee the maximum braking distance while both
brakes act, an inspection of the protection device including all
control and brake times (detector / control / brake) is necessary.
The respective standards, regulations and directives must be
observed.
Function
® ®
The ROBA -diskstop brake is a spring applied, electromagnetic
safety brake.
Spring applied function:
In de-energised condition, thrust springs (10) press the
armature disk (2) against the brake disk.
The brake disk is held between the friction pads (4).
Electromagnetic function:
Due to the magnetic force of the coil in the coil carrier (1), the
armature disk (2) is attracted against the spring pressure to the
coil carrier (1).
The brake is released and the brake disk can rotate freely.
Safety brakes:
® ®
The ROBA -diskstop brakes reliably and safely
in the event of a power switch-off, a power failure or an
EMERGENCY STOP.
29/03/2016 TK/GB/SU
Page 11 of 16
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Type 894. _ _._ _ Sizes 6 – 8
®
can be used as a braking
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
www.mayr.com, E-Mail:
Scope of Delivery / State of Delivery:
The brake is pre-assembled.
Included loose in delivery are (options dependent on Type):
Guide bolts 1 (Items 11 / 11.1) and
guide bolts 2 (Items 12 / 12.1),
cap screw (13), washer (14) and components for the alignment
mechanism (Items 20 to 23).
Please check the scope of delivery according to the Parts List as
well as the state of delivery immediately after receiving the
goods.
®
mayr will take no responsibility for belated complaints.
Please report transport damage immediately to the deliverer.
Please report incomplete delivery and obvious defects
immediately to the manufacturer.
Brake Temperature
DANGER
At an ambient temperature of
+40 °C and a duty cycle of 60 %, the brake can
heat up to +65 °C.
Do not touch the brake
=> Danger of burns!
Adjustment
The brakes are equipped manufacturer-side with
the respective springs for the braking force
stated on the Type tag. Adjustment is not
necessary. Adaptions or modifications are not
permitted as a rule. This rule also applies to the
manufacturer-side adjusted noise damping.
The microswitches are also adjusted manufacturer-side.
Despite great care during the manufacturer-side adjustment, re-
adjustment might be necessary after installation due to
transportation and handling. Furthermore, such switches
cannot be considered fail-safe.
Please also observe the section 'Release Monitoring'.
Noise Damping (Item 18 / Fig. 1):
The noise damping was set and adjusted
manufacturer-side. However, this component is
subject to ageing dependent on the application
or operating conditions (torque adjustment,
switching frequency, ambient conditions,
system vibrations etc.).
Replacing the damping element is only
permitted at the mayr
[email protected]
(B.8.4.3.EN)
®
site of manufacture.