Installation and Operational Instructions for
ROBA-stop
®
-S brake Type 856. _ _ _ . _
Sizes 8, 9 and 10
(B.8.3.GB)
03/11/2010 TK/KE/GC/SU
Chr. Mayr GmbH + Co. KG
Tel.: 08341 / 804-0
Eichenstraße 1
Fax: 08341 / 804-421
D-87665 Mauerstetten
http://www.mayr.de
Page 8 of 14
Germany
E-Mail:
Air Gap Re-adjustment (Figs. 3, 4, 9 and 10)
It is possible to re-adjust the air gap once by removing the
distance washers (Item 21, on Size 8: 6 pieces, on Sizes 9 and
10: 3 pieces) between the flange plate (3) and the coil carrier (2).
If the air gap exceeds the max. value (acc. Table 1) again and
the distance washers (21) have already been removed, the rotor
(4) must be replaced (see section "Replacing the Rotor" (4)).
Please observe the min. air gap for re-
adjustment acc. Table 1.
1. Unscrew the screw plugs (10) inc. the copper sealing rings
(11).
2. Screw in both emergency release screws (7) up to contact on
the coil carrier (2)
DANGER
Caution with hoist drives!
Actuating the emergency release nullifies the
braking torque.
Load crashes must be prevented.
3. Loosen the cap nuts (19) inc. the washers (20).
4. Remove the brake from the flange plate (3).
Do not damage the O-rings (3.2 and 3.3)! Remove abraded
particles from the rotor - clean the brake (do not use grease
or oil).
5.
Remove the distance washers (21) from the flange plate (3).
Fig. 10
6. Clean the brake interior!
7. Push the brake over the stud screws (3.1) and join it with the
flange plate (3).
Do not damage the O-rings (3.2 and 3.3)!
8. Screw on the brake using the cap nuts (19) or the washers
(20).
Please make sure that there is no tilting!
Observe the tightening torque acc. Table 1!
9. Important!
Unscrew both emergency release screws (7) in
the armature disk (5).
Unscrew the screws, but do not remove them.
10. Screw the screw plugs (10) inc. the copper sealing rings (11)
back in. The emergency release screws (7) are spring
applied.
11. Check the air gap.
Replacing the Rotor (4)
1. Follow the procedure as described in section "Air Gap Re-
adjustment", points 1 - 4.
2. Replace the rotor (4).
Check that the toothing moves easily.
The rotor (4) must be placed onto the hub so
that the toothing remains engaged even after
wear on the friction linings.
3. Screw the distance washers (21) onto the flange plate (3)
using the cap screws M6 x 8 DIN 84.
(The distance washers and the cap screws are part of the
delivery set: replacement rotor).
4. Attach the brake following the procedure as described in
section "Air Gap Re-adjustment", points 6 - 10.
5. Check the air gap acc. "Air Gap Inspection".
When ordering replacement rotors, please state the
following Article Numbers:
Size 8:
1924657
Size 9:
1924350
Size 10:
1924494
6. Check the release monitoring device
(see section "Release Monitoring") and re-adjust it if
necessary.
Tacho Attachment (Option)
For tacho generator attachment, the sealing cover (16) must be
removed.
Please make sure that there is appropriate sealing between the
tacho generator and the coil carrier (2).
Electrical Connection and Wiring
DC current is necessary for operation of the brake. The coil
voltage is indicated on the Type tag as well as on the brake body
and is designed according to the DIN IEC 60038 (± 10 %
tolerance). Operation can take place with AC current using a
rectifier or another suitable DC power supply. The connection
possibilities can vary dependent on the brake equipment. Please
follow the exact connections according to the Wiring Diagram.
The manufacturer and the user must observe the applicable
directives and standards (e.g. DIN EN 60204-1 and DIN VDE
0580). Their observance must be guaranteed and double-
checked!
For brake release at max. air gap and with a
braking torque adjustment > 100 % of the
nominal value stated in the catalogue,
overexcitation is mandatory.
Flange plate (3)
Fixing screw
Distance ring (21)
Distance ring (21)
