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Installation- and Operational Instructions
for ROBA-stop

-M Brakes

Type 891. _ _ _ . _ Sizes 2 – 500

(B.8.1.GB)

16/11/2005 TK/KE/RJ

Chr. Mayr GmbH + Co. KG

Tel.: 08341 / 804-0

Eichenstraße 1

Fax: 08341 / 804-421

D-87665 Mauerstetten

http://www.mayr.de

Page 13 of 17

Germany

eMail:

[email protected]

12. Permitted Brake Friction Work

The stated permitted friction work (dependent on the switching frequency), as shown in the characteristics (pages 13 and 14), must never
be exceeded, even in an emergency stop operation.
The following diagrams show the permitted friction work Q

of the various braking sizes and rated speeds (Table 1) relevant to the switching

frequency on which it is based.

Содержание ROBA-spot-M 891 Series

Страница 1: ... Data dependent on size Table 7 Technical Data dependent on size Table 8 Technical Data dependent on size Page 8 Torque Time Diagram Design Functions Delivery range Delivery condition Page 9 Installation Conditions Installation Page 10 Brake torque adjustment Brake inspection Installation hand release Page 11 Electrical connection for brake Building up of magnetic field Page 12 Removal of magnetic...

Страница 2: ...and may only be used in the situations for which they are ordered and confirmed Using them for any other purpose is not allowed Guidelines for Electromagnetic Compatibility EMC In accordance with the EMC Regulations 89 336 EEC the single components produce no emissions However functional components such as the line side energising rectifier for the brakes along with the phase demodulator the ROBA ...

Страница 3: ...ed in open air conditions unprotected from the weather Take precautions against freeze up of the armature disc and the rotor in high humidity and low temperatures Guidelines Standards and Regulations followed 98 37 EC Machine regulations 73 23 EEC Low Voltage regulations 89 336 EEC EMC regulations DIN VDE 0580 Electromagnetic devices and components general specifications Please observe the followi...

Страница 4: ...st spring Torque 19 Hexagon nut see Page 10 Fig 5 7 Magnetic coil 20 Washer see Page 10 Fig 5 8 Cap screw 21 O Ring see Page 10 Fig 5 9 Flat sealing ring Type 891 _ _ _ 1 22 Intermediate plate see page 10 Fig 5 10 Shoulder screw not shown 23 Set screw Adjustable central torque 11 O ring Type 891 _ _ _ 1 24 Straight pin Adjustable central torque 12 Flange plate sealed Type 891 _ _ _ 1 25 Thrust spr...

Страница 5: ...ign with flange plate Pos 12 13 DIN Tightening torque Nm 2 0 15 0 4 0 9 0 1 1 7 3 x M4 x 45 6912 3 x M4 x 50 912 2 5 4 0 15 0 4 0 9 0 1 1 7 3 x M4 x 45 6912 3 x M4 x 50 912 2 5 8 0 2 0 45 1 1 0 1 1 5 3 x M5 x 50 6912 3 x M5 x 55 6912 5 0 16 0 2 0 7 1 6 0 1 2 0 3 x M6 x 60 6912 3 x M6 x 65 6912 9 0 32 0 2 0 7 1 8 0 1 2 0 3 x M6 x 60 6912 3 x M6 x 70 912 9 0 60 0 25 0 8 2 2 0 1 2 0 3 x M8 x 75 6912 ...

Страница 6: ...0 6 700 x 10 6 11 15 10 6 100 16 54 x 10 4 140 x 10 6 840 x 10 6 14 0 13 4 150 31 68 x 10 4 150 x 10 6 950 x 10 6 15 5 14 9 250 61 82 x 10 4 160 x 10 6 1000 x 10 6 17 16 4 500 222 6 x 10 4 200 x 10 6 2000 x 10 6 18 5 17 9 The stated values Qr 0 1 and Qr tot are merely approximate values for specific friction work 0 5 J mm2 and sliding speeds 10 m s Table 5 Technical Data dependent on size Referrin...

Страница 7: ...5 50 250 40 55 55 60 40 50 50 55 40 55 40 50 50 55 500 50 75 75 80 50 75 75 80 50 75 50 75 Table 7 Technical Data dependent on size Braking torque Nm with tolerance 30 10 40 20 Size 125 Type 891 _8_ _ 112 Type 891 _7_ _ Standard brake 100 Type 891 _1_ _ 84 Type 891 _2_ _ 68 Type 891 _3_ _ 50 Type 891 _4_ _ 34 Type 891 _5_ _ Holding brake Type 891 10_ _ 2 2 5 2 2 2 1 7 1 4 1 0 7 4 4 5 4 5 4 3 4 2 8...

Страница 8: ... springs 6 press against the armature disc 3 The rotor 4 is held frictionally locked between the armature disc 3 and the friction disc 5 the flange plate 12 or 13 dependent on type or the user machine wall The braking torque is induced into the drive line via the rotor gearing 4 and the hub 1 Electromagnetic release The armature disc 3 is pulled against the spring pressure on the coil carrier 2 by...

Страница 9: ...user The user can also carry out the design according to the valid basis calculation DIN 6892 The quality of the hub is to be calculated as follows for sizes 2 and 4 with Re 230 N mm2 and for sizes 8 to 500 with Re 300 N mm2 The length of the key should cover the whole hub Please note the usual permitted tensions for mechanical engineering when measuring the dimensions of the key connections Befor...

Страница 10: ...g torque with the braking torque stated on the Type tag 26 Release inspection This is done by energising the brake or by manually operating the hand release dependent on type The braking torque is not reached until the run in procedure has been completed The braking torque switching torque is the torque effect in the shaft line when the brake slips at a sliding speed of 1 m s in relation to the mi...

Страница 11: ...10 Magnetic field build up When the voltage is switched on a magnetic field is built up in the brake coil which attracts the armature disc 3 to the coil carrier 2 The brake is released Magnetic field build up with normal excitation When a nominal voltage is applied to the magnetic coil 7 via a half wave or a bridge rectifier the coil current will not reach its nominal value immediately The inducti...

Страница 12: ...the switching contacts caused by the resulting sparks and insulation destruction short brake engagement time e g for an Emergency stop however higher switching noises Protection wiring For D C side switching the coil must be protected by a suitable protection wiring according to VDE 0580 This is already integrated in mayr rectifiers To protect the switch contact from corrosion when switching D C s...

Страница 13: ...r de Page 13 of 17 Germany eMail info mayr de 12 Permitted Brake Friction Work The stated permitted friction work dependent on the switching frequency as shown in the characteristics pages 13 and 14 must never be exceeded even in an emergency stop operation The following diagrams show the permitted friction work Qr of the various braking sizes and rated speeds Table 1 relevant to the switching fre...

Страница 14: ...uctions for ROBA stop M Brakes Type 891 _ _ _ _ Sizes 2 500 B 8 1 GB 16 11 2005 TK KE RJ Chr Mayr GmbH Co KG Tel 08341 804 0 Eichenstraße 1 Fax 08341 804 421 D 87665 Mauerstetten http www mayr de Page 14 of 17 Germany eMail info mayr de ...

Страница 15: ...ewed from the motor bearing shield or from the machine wall 13 1 Remove the fixing screws 8 13 2 Clean the brake keep an industrial vacuum handy and wear a mask Continue work as described in Points 6 2 and 6 4 Remove abrasion particles using pressurised air 13 3 Pull the rotor 4 off the hub 1 13 4 Check the hub 1 for damage and if necessary replace it 13 5 Inspect the armature disc 3 and the count...

Страница 16: ...ticles in the hub gearing teeth Worn or knocked out hub and rotor gearing teeth Broken gearing teeth The brake doesn t fully release permanent slipping of the rotor Reduced axial movement of rotor rotor jams axially Damaged or deformed hub and rotor gearing teeth Check the hub and rotor gearing teeth keep to suitable maintenance intervals Wrong voltage no D C voltage Check the voltage observe the ...

Страница 17: ... water cleaning products condensation formation Ensure protection from ambient influences Wrong type and quality of the counter friction surface Check the counter friction surface Braking torque change Very low friction speeds Check the design Excessive tension path caused by wear over the permitted limits Check for wear replace the rotor Continuous slipping or permanent brake slipping under load ...

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