Operating and Installation Instructions FDB (Getriebebau NORD)
Operating and Installation Instructions Version 08.2011
for the electromagnetically released
Spring-Applied Brakes (Getriebebau NORD Design)
FDB 08 … FDB 40
Version 08.2011 Page 1 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
Table of Contents
1. Information on Operating and Assembly Instructions
1.1 Validity
1.2 Purpose and Use
1.3 Terms and Identification of Notices
2.1 Persons
2.1.1 Operator
2.1.2 Personnel
2.2 Product
2.2.1 Area of Application
2.2.2 Environment of Application
2.2.3 State of Application
2.2.4 General Conditions of Operation
2.3 Proper Use
2.4 Legal Aspects
2.4.1 Liability
2.4.2 Warranty
2.4.3 Directives and Standards
2.5 Delivery scope and state
3.1 Labelling
3.1.1 Lettering
3.1.2 Type Designation Code
3.2 Technical Information
3.2.1 Operation of the Brake
3.2.2 Technical Data
4. Assembly
4.1 Mechanical Installation
4.1.1 Prerequisites and Preparation
4.1.2 Counter-Friction Surface
4.1.3 Hub and Rotor
4.1.4 Brake
4.2 Electrical Installation
2. Conditions for Assembly and Operation
3. Product Description
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Operating and Installation Instructions FDB (Getriebebau NORD)
4.3 Conversions and Supplements
4.3.1 Change of Braking Torque
4.3.2 Subsequent Assembly of Manual Release
5.1 Brake in Operation
5.1.1 Commissioning
5.1.2 Running Operation
5.1.3 Maintenance
5.2 Brake out of Operation (Malfunctions)
6. Disassembly / Exchange
6.1 Removing the Brake
6.2 Exchange of Components
6.3 Exchange of Brake / Disposal
6.4 Spare parts
5. Operation
Version 08.2011 Page 3 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
1. Information on Operating and Assembly Instructions
1.1 Validity
These operating and assembly instruction (in accordance with their title) are generally valid only
for the Getriebebau NORD design of the electromagnetically released spring-applied
brakes FDB 08 to FDB 40 of M/s. PRECIMA Magnettechnik GmbH. Moreover, they are a
necessary element of every brake delivery and generally only valid for such simultaneously
delivered brakes. The operating and assembly instruction will even continue to be valid for such
brakes, if a later version of the instructions exists, unless M/s. PRECIMA expressly declares to
the customer that the later version replaces the older one.
In individual cases, the above mentioned principles may be deviated from (e.g. in case of
special designs or repeated deliveries). In any case, an indicative or supplementing information
of M/s. PRECIMA will be required.
1.2 Purpose and Use
These operating and assembly instructions are to contribute to a safe and proper
assembly and operation of the spring-applied brake.
In order to meet this requirement and purpose, all the persons dealing with the assembly and
the operation of the brake (qualified according to 2.1.2) have to completely and thoroughly
read these instructions before carrying out their respective activities (assembly, commissioning,
operation, maintenance, etc.). Furthermore, said persons of course have to observe and
implement the given instructions when carrying out their respective activities. The
instructions themselves must be accessible any time (even after completion of the respective
activity) and within short time in a clean, complete and well legible condition.
Despite careful and thorough elaboration of the instructions, mistakes, defects and
incompleteness in the operating and assembly instructions cannot be excluded. For this reason,
please consult M/s. PRECIMA if in doubt. Other technical questions, notes and suggestions for
improvement can also be directed to the following address:
Röcker Straße 16
D – 31675 Bückeburg
Telefon Nr.: +49 (0) 57 22 / 89 33 2 -0
Telefax Nr.: +49 (0) 57 22 / 89 33 2 -2
E-mail: info@precima.de
Version 08.2011 Page 4 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
1.3 Terms and Identification of Notices
Important notices in Chapter 4 (Assembly), Chapter 5 (Operation) and Chapter 6 (Disassembly /
Exchange) referring to technical security as well as to industrial safety are particularly
highlighted by the following signal words:
Data sheet = Technical data sheet
End plate = Motor end plate = end plate of an electric motor
Dimension sheet = Dimension drawing
PRECIMA = M/s. PRECIMA = PRECIMA Magnettechnik GmbH, Bückeburg
Shaft = Motor shaft = shaft of an electric motor
In the scope of these operating and assembly instructions, the spring-applied brake is
ÎDanger! Refers to processes and operation procedures which are to be thoroughly
observed in order to exclude a hazard to persons.
ÎAttention! Refers to safety measures which must absolutely be followed in order to
avoid brake failures.
ÎStop! Refers to instructions that have to be particularly observed when carrying
out the work described.
In order to simplify the text of these operating and assembly instructions, certain longer and
complicated terms are replaced by shorter ones which will have the following meanings in the
scope of these instructions:
Instructions = Operating and assembly instruction
Working brake = Brake which implements friction work in regular operation, i.e. performs a
braking function
Brake = Spring-applied brake = electromagnetically released spring-applied brake
Holding brake = Brake which does not
holds the load in position. In case of an emergency, however, it may also perform a braking
function.
considered to be a machine element to be connected to an electric motor since this
combination represents the most frequently used variant. Accordingly, certain designations
refer to said fact (motor shaft, motor end plate Î see above). However, this is no general
limitation of the validity of these instructions to such combinations - just as there is no
comparable limitation to the application of the spring-applied brake at all.
perform friction work in regular operation but merely
Version 08.2011 Page 5 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
2. Conditions for Assembly and Operation
2.1 Persons
2.1.1 Operator
Operator is that natural person or entity using the spring-applied brake or instructing the springapplied brake to be used. The operator and/or a person assigned by him must safeguard the
proper use according to 2.3 and the observance of relevant standards and provisions,
regulations and laws. In particular, he has to take care of the fact that only qualified personnel
according to 2.1.2 is entrusted with work at the brake.
2.1.2 Personnel
Personnel to carry out work at the brake must exclusively be qualified personnel who -
based upon their education, experience, instructions as well as knowledge concerning
relevant standards and provisions, accident prevention, regulations and operating
conditions - have been authorised by the person being responsible for safety, to carry
out the activities described in these instructions and who - when doing so - are in a
position to recognise possible risks early and to avoid them.
2.2 Product
2.2.1 Area of Application
The area of application of the brake is limited to plants and machines and is defined by the
general operating conditions stated in 2.2.4 as well as by the boundary conditions,
performance data and dimensions indicated in the dimension drawing and on the name plate
(lettering) of the brake (see: 3.1). Any deviation from these directives require a particular
agreement with PRECIMA. Particularly pay attention to the application as a working and an
application as a holding brake (definition: see 1.3).
2.2.2 Environment of Application
The environment of application of the spring-applied brake must be designed such that after its
proper assembly the brake may fulfil its function in perfect operation and will not pose any risk
for persons and material assets. Changes in the environment of application (e.g. at the machine
or plant which the brake is connected with) must only be carried out, if they have no influence
on the first mentioned condition.
2.2.3 State of Application
The permissible state of application of the brake includes the operationally perfect state of all
components (in case of worn parts: exchange in time) and the observance of the operating and
assembly requirements specified in these instructions as well as the omission of any retrofits,
changes or modification of the brake, unless authorised by PRECIMA. The latter also includes
the use of only original spare and exchange parts.
Version 08.2011 Page 6 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
ÎAttention!
Friction surfaces and the friction lining should not under any circumstances be in
contact with oil or grease since already small quantities reduce the braking torque
considerably!
2.2.4 General Operating Conditions
Operating time: 100%
Ambient temperature: -10…+45°C
Should any of the above parameters be exceeded . M/s. PRECIMA should be contacted
for advice.
2.3 Proper Use
At the time of delivery, the spring-applied brake represents the state of the art technology, and
is generally considered to be reliable in operation. Only use it properly in order to avoid any risk
to persons and material assets.
The spring-applied brake is properly used, if qualified personnel (according to 2.1.2) by applying
the valid operating and assembly instructions (as per 1.1, according to 1.2) produces and
maintains a permissible state of application (according to 2.2.3) in an admissible environment
of application (according to 2.21).
The improper (inappropriate) use includes hazards which could not be completely taken
into account when designing and construction the brake and which are unforeseeable in
this sense.
2.4 Legal Aspects
2.4.1 Liability
On the basis of the information, data and directions given and of the illustrations and
descriptions included in these operating and assembly instructions, no claims for brakes outside
the area of application of these instructions (compare 1.1) may be submitted.
In general, an inappropriate use of the brake (compare 2.3) will exclude the liability of M/s.
PRECIMA.
2.4.2 Warranty
For the warranty terms refer to the General Terms of Sales and Delivery of M/s. PRECIMA
(www.precima.de
immediately after establishing a deficiency or a defect. The exclusion of liability according to
2.4.1 simultaneously means that no warranty claim exists.
/ AGB). In all cases, warranty claims are to be submitted to PRECIMA
Version 08.2011 Page 7 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
2.4.3 Directives and Standards
The spring-applied brake was produced in accordance with the following EC directives
and standards:
- EC Directive Machinery (2006/42 EC)
- EN ISO 12100-1 and 12100-2: Safety of Machinery (Basic Concepts)
- EC Directive Electromagnetic Compatibility (2004/108 EG). Compliance with this directive has
to be safeguarded with the appropriate switchgear of the user.
The spring-applied brake is not an independently operable machine but intended to be
installed in other machinery. Its commissioning is prohibited until the establishment is
reached that the machines comply with the provisions of the EC Directive.
2.5 Delivery Scope and State
Check the delivery scope and state immediately upon receipt of the brake.
M/s. Precima will not assume any warranty for subsequently claimed defects
(refer to 2.4.2).
Immediately report damage in transit to the forwarders and the incompleteness of the delivery
and visible defects to the manufacturer plant.
ÎAttention!
Should any uncertainties or discrepancies occur during the examination or should the
delivery be incomplete or defective, the brake must not be installed or commissioned
without previously contacting PRECIMA.
Version 08.2011 Page 8 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
3. Product Description
3.1 Labelling
3.1.1 Lettering
The lettering of the spring-pressure brake includes all important data.
These data and the contractual provisions for the brakes establish the limits of their use.
Lettering on the brake housing:
Braking torque in Nm
Year of manufacture
Month of manufacture
Operating voltage (DC) in Volt
3.1.2 Type Designation Code
Example:
FDB 15 N H F R T S M 20 H7 24 VDC
Operating voltage
Hub bore
Micro switch
Dust guard ring
Tapped bores
for encoder mounting
Friction plate
Flange
Manual release
without code:
Operating noise-damped
Brake type: N – standard; C – adjustable
Brake size (sizes: 08, 10, 13, 15, 17, 20, 23, 26, 30, 40)
Brake designation (series)
*) The Options I are specified in this Operating and Installation Instructions. These options, if re-
quired, have to be indicated at the time of order (e.g. by using the code)
**) The Options II are not specified in this Operating and Installation Instructions. At FDB series it
is only the option M (=Micro switch). This option, if required, has also to be indicated at the time
of order and it is not retrofittable. There are seperate Operating and Installation Instructions for
Options II which have to be observed.
103V 12 09 40
1)
1)
Options II *)
only design N
Options I *)
Version 08.2011 Page 9 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
3.2 Technical Information
3.2.1 Operation of the Brake (Illustration 3.1)
The electromagnetically released spring-applied brakes of the FDB series are fail-safe brakes,
this means that the braking torque is generated by means of spring force, and released by
magnetic force.
During braking, the pressure springs (item 4, illustration 3.1) apply pressure to the armature
plate (item 2) trapping the rotor (item 3.1 / 3.2) which is keyed to the machine shaft, against the
counter-friction surface (flange (item 7), friction plate (item 8) or motor flange). The two friction
sides of the rotor and the armature disk and/or the counter-friction surface produces the braking
torque.
During releasing, a magnetic force is produced through applying a direct voltage to the magnet
body (item 1.1 / 1.2) via the field winding. Said magnetic force draws the armature disk (item 2)
to the magnet body and the brake rotor is released.
During manual releasing (only if brakes are designed with manual release), the armature disk
is mechanically pulled against the magnet body by pulling the manual release handle (item 5,
with screwed-in manual releasing lever (item 5.1)) and thus the rotor is released. This enables
you to release the brake, for example, even if there is a power failure.
ÎAttention!
For safety reasons, the adjustment of the manual release must not be changed!
Illustration 3.1:
Operation of the
brake (sectional
view)
Version 08.2011 Page 10 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
Brake type N (Illustration 3.1 top)
The standard type of the spring-pressure brake is delivered with a fixed braking torque MbN. Via
the number of springs (item 4), this torque can be varied as per 3.2.2.1.
Brake type C (Illustration 3.1 bottom)
The braking torque for this brake type with central adjusting ring (item 10) is also adjustable via
the number of springs as per 3.2.2.1 similar to type N. Furthermore, it can additionally be
adjusted by screwing in and screwing out the adjusting ring. The nominal braking torque
has been adjusted as soon as the ring firmly contacts the magnet housing (item 1.2). Screwing
out will result in a step-by-step reduction of the braking torque as per 3.2.2.2.
3.2.2 Technical Data
3.2.2.1 Nominal braking torques and number of springs
Size
08 10 13 15 17
N 20 C 23 N 23 C
20
26 30 40
Nominal
braking
torques
M
bN
[Nm]
7,5* 15* 30* 60* 90* 150* 150* 225* 225* 375* 600* 1500*
5 10 20 40 60 100 100 150 150 250 400 1000
3,5 7 14 28 43 70 80 107 105 187 300 850
3 6 12 23 34 57 50 85 63 125 200 675
2 4 8 17 26 42 65 500
* only with holding brake possessing emergency-stop properties
— Permissible deviations of the real braking torque:
Working brake: -30% (new) or ±20% (run-in)
Holding brake: ±20% (new) or -10/+30% (run-in) —
Size
Number
of
springs
for the
above M
08 10 13 15 17
― Please, ask for spring quantities for nominal braking torques deviating from M
7 7 7 7 7 7 8 7 8 8 8 12
5 5 5 5 5 5 6 5 6 6 6 10
4 4 4 4 4 4 4 4 4 4 4 8
bN
3 3 3 3 3 3 3 6
N 20 C 23 N 23 C
20
26 30 40
―
bN
3.2.2.2 Torque reduction (design C)
Size
Torque reduction
/ latching step
[Nm]
Number of usable
latching steps
(max. permissible
turning out the
threaded ring)
08 C 10 C 13 C 15 C 17 C 20 C 23 C 26 30 40
0,2 0,2 0,3 1 1,3 1,5 2
no standard design C
6 12 12 9 12 18 24
Version 08.2011 Page 11 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
3.2.2.3 Dimensions, masses, attachment (illustration 3.2)
Illustration 3.2:
Main dimensions of
the brake
a (air gap) and s (rotor size): see
3.2.2.4
Hub dimensions
[mm]
Hexagon
Size
hub
H7
Ød
08
10
13
15
17
20
23
26
30
40
d d d
11/14/15 11/14*/15* 20 18 1,5 0,5 85 / 89 40 / 1,5 / 6 22 100
15/19/20* 14/15 25 20 2,5 1 105 / 109 48 / 1,5 / 7 21 110
15/20/25 15/20 33 20 3,5 1,5 130 / 135 53 / 1,5 / 9 33 130
20/25/30 20/25 42 25 3 2 150 / 155 60 / 1,5 / 9 38 140
- 25/30/35* - 30 3 - 170 / 175 70 / 2 / 11 42 165
- 30/35/40 - 30 3 - 195 / 201 80 / 2 / 11 48 186
- 35/40/45 - 35 4 - 225 / 231 90 / 2 / 11 51 200
- 40/45/50/55* - 40 4 - 258 / 264 99 / 2 / 11 57 285
- 50/55/60/65* - 50 4 - 306 / 312 105/ 2 /12,5 59 310
- 65/70/75/80* - 70 4 - 400 / 408 120,6 / 18** 69 415
Standard feather key groove of the hub as per DIN 6885/1-JS9
* deviating feather key groove as per DIN 6885/3-JS9 // ** no option Friction plate; dimension h2 (Flange)
*** seperate inner pole: 8 mm without thread (through-hole)
Toothed
hub
H7
Ød
Mounting
dimensions
m n1 n2d7 / d8
1
General brake dimensions
[mm]
Brake
without /
with dust
guard ring
Brake in new
condition
g / h1 / h2
Brakes with
manual
release
t z e2 k
c
89
111
132
151
172
196
224
258
304
403
Dimensions of
tapped bores [mm]
- only design N -
Hole
circle
Øe1
±0,1
34 (3 x) M4 8
40 (3 x) M5 12
54 (3 x) M6 12
65 (3 x) M6 12
75 (3 x) M8 15
85 (3 x) M8 15
95 (3 x) M8 15
110 (6 x) M10 25
138 (6 x) M10 25
180 (6 x) M12 43***
(Bore
qty.)
x thread-
nom.-Ø
p
2
thread
depth
2
Version 08.2011 Page 12 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
Tightening
torque
[Nm]
Fastening
screws
Size
Brake without
manual
release and
flange
Masses
[kg]
Manual
release
Attachment dimensions
[mm]
Hole
Øe
±0,1
(Bore qty.)
1
thread-
nom.-Ø
b
1
Flange
circle
e1 k
Thread depth
x
with-out /
with friction
plate
2
/ b1 M
Threaded
(design C)
p…p
A
Adjusting
dimensions
[mm]
ring
max
Manual
release
y
08
10
13
15
17
20
23
26
30
40
** no option Friction plate; thread depth for option Flange
1,10 0,05 0,20 72 (3 x) M4 6 / 9,5
1,90 0,08 0,34 90 (3 x) M5 7 / 10,5
3,10 0,10 0,68 112 (3 x) M6 9 / 12,5
4,60 0,13 0,90 132 (3 x) M6 9 / 12,5
6,30 0,17 1,40 145 (3 x) M8 11 / 14
10,00 0,24 1,90 170 (3 x) M8 11 / 14
14,70 0,29 2,50 196 (3 x) M8 11 / 19
21,50 0,80 3,50 230 (3 x) M10 11 / 19
35,00 0,90 5,20 278 (6 x) M10 19 / 17
60,00 0,90 13,10 360 (6 x) M12 17 / 19**
3
6
10
10
25
25
25
50
50
85
3...6 1
3...9 1
3,5...9,5 1
3,5…8 1
4,5...10,5 1
7…14 1,2
8…17 1,2
- 1,5
- 1,5
- 1,5
Dimension y see 4.3.2 or illustration 4.2
3.2.2.4 Air gaps, rotor values
Size
08
10
13
15
17
20
23
26
30
40**
Nominal air
gap
[mm]
a
a
nenn
+0,15
0,2
+0,15
0,2
+0,15
0,3
+0,15
0,3
+0,15
0,3
+0,15
0,4
+0,15
0,4
+0,2
0,5
1,20 0,90* 20,0
+0,2
0,5
1,20 0,90* 20,0
+0,2
0,6
1,20 1,20* 22,0
max. air
gap
[mm]
s
max
0,60 0,45* 7,5
0,70 0,45* 8,5
0,80 0,55* 10,3
0,90 0,60* 12,5
1,00 0,60* 14,5
1,10 0,80* 16,0
1,10 0,80* 18,0
Rotor size
(new state)
[mm]
s
neu
-0,1
4,5 0,015 x 10-3 6000
-0,1
5,5 0,045 x 10-3 6000
-0,1
7,5 0,173 x 10-3 6000
-0,1
9,5 0,45 x 10-3 6000
-0,1
11,5 0,86 x 10-3 3600
-0,1
12,5 1,22 x 10-3 3600
-0,1
14,5 2,85 x 10-3 3600
-0,1
16,5 6,65 x 10
-0,1
16,5 19,5 x 10
-0,1
18,5 44,5 x 10
Rotor size
(minimum)
[mm]
J n
min
Mass
moment of
inertia rotor
[kgm
2
]
-3
-3
-3
Max. speed
rotor
-1
[min
]
n
max
max
rotor
weighed heavy
6000
6000
6000
1500 3000 / 6000*
1500 3000 / 6000*
1500 3000 / 6000*
* Holding brakes with emergency-stop properties
** Switched with fast acting rectifier (over-excitation)
Version 08.2011 Page 13 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
3.2.2.5 Friction work, friction capacity
Max.
Size
permissible
friction
capacity** [J/h]
08
10
13
15
17
20
23
26
30
40
288 x 10
360 x 10
468 x 10
576 x 10
720 x 10
900 x 10
1080 x 10
1260 x 10
1440 x 10
1620 x 10
Working brake Holding brake ***
P
W
Rmax
3
3
3
3
3
3
3.2.2.6 Electrical specific values
Max. permissible
friction work /
braking [J]
P
Rmax
3 x 103 144 x 103 1.5 x 103 16 x 106
6 x 103 180 x 103 3 x 103 30 x 106
12 x 103 234 x 103 6 x 103 42 x 106
25 x 103 288 x 103 12 x 103 70 x 106
35 x 103 360 x 103 17 x 103 85 x 106
50 x 103 450 x 103 25 x 103 140 x 106
3
75 x 103 540 x 103 37 x 103 170 x 106
3
105 x 103 630 x 103 52 x 103 230 x 106
3
150 x 103 720 x 103 75 x 103 310 x 106
3
200 x 103 810 x 103 100 x 103 400 x 106
** in case of a uniform timely distribution of brakings
*** with sizes 08…13: Lining HT; with sizes 15…40: Lining HD
Max.
permissible
friction
capacity** [J/h]
W
Rmax
Max. permissible
friction work /
braking [J]
Qr 0,1
Rmax
Friction work /
0.1 mm
wear
[J]
Size
P
08
10
13
15
17
Electric
power
(average)
[W]
U IN P
20°C
22
28
34
45
55
Nominal
Voltage
[VDC]
current
(guide
Size
value) [A]
24 0,92
103 0,25 103 0,86
180 0,12 180 0,46
20
Electric
power
(average)
[W]
U IN
20°C
85
Nominal
Voltage
[VDC]
current
(guide
value) [A]
24 3,30
205 0,11 205 0,44
24 1,17
103 0,31 103 0,86
180 0,16 180 0,40
23
76
24 3,20
205 0,13 205 0,34
24 1,42
103 0,38 103 1,12
180 0,19 180 0,60
26
105
24 4,17
205 0,15 205 0,54
24 1,69
103 0,46 103 1,36
180 0,25 180 0,78
30
140
24 5,90
205 0,24 205 0,68
24 2,18
103 0,59
180 0,30 180 0,77
40
144
— —
— —
205 0,28 205 0,73
Version 08.2011 Page 14 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
3.2.2.7 Switching times
Nominal
Size
braking
torque
[Nm]
Separating
time
[ms]
Response
delay
[ms]
Linkage time
[ms]
Response
delay
[ms]
Linkage time
[ms]
M
08
10
13
15
17
20
23
26
30
40**
= t2 = t
bN
7,5* 60* 12* 32* 40* 70*
5
15* 85* 15* 45* 80* 125*
10
30* 125* 20* 60* 140* 200*
20
60* 140* 18* 68* 80* 155*
40
90* 190* 18* 78* 120* 210*
60
150* 175* 26* 106* 160* 280*
100
225* 290* 40* 140* 250* 400*
150
375* 360* 46* 166* 200* 400*
250
600* 450* 50* 180* 250* 600*
400
1500* 450* 120* 280* 2500* 2950*
1000
switched on d.c. side switched on a.c. side
= t
11DC
= t
1DC
= t
11AC
1AC
=
35 18 38 60 90
60 20 50 100 145
85 25 65 220 280
100 20 70 150 225
120 22 82 200 290
150 35 115 300 420
270 45 145 320 570
300 58 178 400 600
400 65 195 550 900
320 160 320 3000 3450
* Holding brakes with emergency-stop properties
** Switched with fast acting rectifier (over-excitation)
— The switching times indicated are to be understood as tolerance-afflicted
t
= separating time = time from switching on the current to cessation of braking torque (Mb ≤ 0,1*MbN)
2
– Over-excitation by fast acting rectifier results in approx. half the separating times –
t1DC = linkage time = response time when braking with interruption at d.c. side by mechanical switches =
time from switching off current to reaching the full braking torque (M
t1AC = linkage time = response time when braking with shutdown at a.c. side, i.e. by interrupting a
separately supplied rectifier
t
DC / t
11
11
(included in the respective linkage time)
– Depending on operating temperature and wear of the brake disks, the real response times (t2, t1DC, t1AC)
may deviate from the guide values indicated here. In case of a voltage reduction by a fast acting rectifier, there
will be reduced linkage times –
Version 08.2011 Page 15 of 23
AC = response delay = time from switching off current to the rising of the braking torque
guide values with nominal air gap —
≥ 0,9*M
b
bN
)
Operating and Installation Instructions FDB (Getriebebau NORD)
4. Assembly
4.1 Mechanical Installation
4.1.1 Prerequisites and Preparation
- When unpacking the spring-applied brake check for damage, and missing parts (according
to delivery note). Complaints regarding damages in transit have to be immediately made with
the supplier, complaints of missing parts or short supply have to be made with PRECIMA
(also refer to 2.5).
- Compare the data on the name plate of the brake with the suppliers invoice and customers
order.
ÎAttention!
Should the checks result in any uncertainties or discrepancies, the brake must not be
installed and commissioned without prior consultation with PRECIMA.
4.1.2 Counter-friction surface
4.1.2.1 Motor endsheild or adaptor, etc. as counter-friction surface
- Check whether the existing counter-friction surface meets the relevant requirements
(material: steel, steel casting, grey cast iron - no aluminium / stainless steel with limitations -
surface quality Rz 6.3 and whether it is free from grease and oil.
4.1.2.2 Flange, friction plate
- If the counter friction surface ís supplied in the form of a flange (item 7, illustration 4.1) or a
friction plate (item 8), first of all flange or friction plate have to be bolted to the motor
(independent of the brake). The thread of the screws to be used corresponds with the thread
of the fastening screws of the brake. The hole pitch circles must be identical as well. In
general, it is also possible to do without this screw connection, however, for reasons of
performance this approach and practice is not recommended by M/s. PRECIMA
particularly with regard to the friction plate.
ÎAttention!
Should the counter-friction surface not meet the relevant requirements, the brake must
not be installed and commissioned without prior consultation with PRECIMA. Completely
remove grease and oil from the counter-friction surface before processing the brake
further!
4.1.3 Hub and rotor (illustration 4.1)
ÎStop!
Before actually mounting the rotor, its thickness has to be checked in accordance with
3.2.2.4. S
permissible rotor thickness. When installing a new rotor, s = s
case of a reassembly (e.g. after a dismounting caused by maintenance work), s > s
must be guaranteed, otherwise the rotor has to be replaced.
is the value for a new rotor (tolerance = 0/-0.1 mm), s
new
is the minimum
min
must be guaranteed. In
new
min
Version 08.2011 Page 16 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
(
)
The rotor is fixed to the motor shaft and revolves with the motor shaft and brakes the shaft when
power is removed from the brake:
- Insert the first circlip (item 14) into the rear radial groove of the shaft
- Insert the feather key (item 15) into the axial groove of the shaft
- Push the toothed hub (item 6.1) or the hexagon hub (item 6.2) onto the shaft and over the
feather key
- Axially fix the hub by inserting the second circlip (item 16) into the front radial groove of the
shaft
- Push the rotor (item 3.1 or 3.2) onto the hub The rotor must be able to move axially on the
hub.
ÎAttention! Pay attention to the smooth running of the rotor/hub pair!
Illustration 4.1:
Brake assembly
sectional view
4.1.4 Brake (illustration 4.1)
The brake is attached to the flange or to the motor flange (if this is the counter-friction surface or
if a friction plate is used). The important adjustments need to be made for safe operation of the
brake, if necessary, the brake will be supplemented by additional component parts:
- Fit the brake onto the rotor, insert the fastening screws (item 11) until hollow screws (item
12) rest on the counter-friction surface.
- Check the size of air gap a in order to keep the nominal value (+ tolerance) by means of a
feeler gauge at three positions on the circumference and, if necessary, correct it by turning
the hollow screws (for values of nominal air gap and tolerance: see 3.2.2.4).
Î How to proceed in order to correct the air gap refer to 5.1.3.1.
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Operating and Installation Instructions FDB (Getriebebau NORD)
- Tighten the fastening screws with the tightening torque according to 3.2.2.3
- Position the O-ring (item 13; only for brakes with option “Operating noise-damped”)
- Position the dust ring (item 9; only for brakes with option S )
- Screw the manual release lever (item 5.1) with the washer in position into manual release
bracket (item 5) and tighten it at the hexagon faces (only brakes with manual release =
option H )
- Adjust the braking torque by means of the threaded ring (item 10). Adjusting values: refer to
3.2.2.2 (only brakes according to design C)
4.2 Electrical Installation
Carry out the electrical connection with power off. The operating voltage (DC) of the brake is
indicated on the magnet housing (see 3.1.1 and illustration 3.2
ÎStop! For the electrical connection the detailled Instruction „Electrical connection
of PRECIMA Spring-Applied Brakes“ has to be observed!
4.3 Conversions and Supplements
4.3.1 Change of Braking Torque
A change of the braking torque (with design C in addition to the adjusting ring as per 3.2.2.2)
can be carried out by changing the number of springs according to table 3.2.2.1. In doing so,
pay attention to the uniform distribution of the externally arranged springs.
4.3.2 Subsequent Assembly of Manual Release (illustration 4.2)
Brakes that were directly ordered as brakes with a manual release (option H), have already a
manual release mounted and the adjustment must not be changed (refer to safety information
undsr 3.2.1).
A manual release handle can be fitted by the customer using the procedure below:
- Place the manual release handle (item 5) onto the magnet body (item 1.1 / 1.2) and insert
the two pins with cross threaded hole (item 23) in the appropriate bores of the manual
release handle.
- Insert the screw (item 20) with the washer in position (item 21) and the pressure spring (item
22) into the bores of the armature disk. The screws will pass through the armature plate and
magnet body; the washer is positioned between the head of the screw and the armature
plate The pressure spring runs through the armature and is held by the washer and magnet
body on the other side.
- Screw the screws into the pins (item 23) and adjust the dimension y according to 3.2.2.3.
Lock both screws in the correct adjusting position by means of screw sealing wax.
Î Attention!
For safety reasons, the adjustment of the manual release must not be changed even after
a subsequent mounting by the customer! A readjustment of the braking air gap a (refer to
5.1.3.1) does not
require any adjustment of dimension y!
).
Version 08.2011 Page 18 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
Illustration 4.2:
Assembly of the
manual release
(partial sectional view)
5. Operation
5.1 Brake in Operation
5.1.1 Commissioning
Before commissioning the brake, a functional test has to be carried out. This can normally be
carried out together with the motor & brake attached. For possible malfunctions refer to: 5.2.
ÎStop!
The complete braking torque will only be effective after the brake linings at the rotor have
run in! Î For deviation values to M
5.1.2 Running Operation
Without any malfunctions occurring, the running operation does not require any maintenance
except for checking the size of the air gap (this increases as the lining on the rotor wears). This
has to be checked in accordance with the following schedule (also refer to 5.1.3), unless a
particular sensor for wear monitoring has been included in the brake. In case of malfunctions,
proceed according to 5.2.
Working brake: + according to service life calculation
+ according to specifications made by the customer
: see 3.2.2.1
bN
Check intervals:
Version 08.2011 Page 19 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
Holding brake: + at least every two years
+ according to specifications made by the customer
+ use shorter intervals in case of frequent emergency stops
Furthermore, check the rotor size s after a number of re-adjustments of the air gap a (see
5.1.3). A suitable control interval results from the relation of the difference s
difference a
5.1.3 Maintenance
5.1.3.1 Readjusting the air gap
The spring-applied brake is virtually maintenance-free. However, when the maximum air gap
stated under 3.2.2.4 is reached, a re-adjustment (new adjustment) of the air gap a will be
required for the safe operation of the brake. The functional capability of the brake which may in
certain cases go beyond the maximum air gap does not change the aforesaid requirement: “a
proper use” will no longer exist in such a case. In this case, functional capability and safety
function of the brake will be compromised with a further increase in wear.
How to proceed when readjusting the air gap:
- Viewing in direction of the brake (see illustration 5.1) loosen the fastening screws (item 11)
by turning them half a rotation counter-clockwise.
- Turn the hollow screws (item 12) into the magnet body by also turning them counter-
clockwise.
- Turn the fastening screws (clockwise) into the (motor) flange until the nominal air gap is
reached (to be measured with feeling gauge) at three positions on the circumference.
- Reset the hollow screws, i.e. turn them out of the magnet body (clockwise) until locked
against the counter-friction surface.
- Tighten the fastening screws with the tightening torque as per 3.2.2.3.
- Subsequently control of the air gap, if necessary, carry out a readjustment
nenn
– a
considering the respective tolerances.
max
(illustration 5.1)
neu
– s
min
to
Illustration 5.1:
Readjusting the air gap
(sectional view)
Version 08.2011 Page 20 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
5.1.3.2 Replace the rotor
When the minimum rotor size s
gap “a” is no longer possible and the rotor has to be replaced. An operative readiness of the
brake in certain cases falling below the minimum rotor size does not change the above
statement; in such a case “a proper use” is no longer existing.
ÎStop!
Even after an exchange of the rotor, the complete braking torque will only be effective
after the brake linings at the rotor have run in!
Î For deviation values to M
ÎAttention!
During the task of replacing the rotor, all the mechanical parts associated with the
transmission of the braking torque have to checked for excessive wear (armature disc,
hollow screws) and/or integrity (springs) and, if required, to be replaced!
5.2 Brake out of Operation (Malfunctions)
The following table includes typical problems during commissioning or running in, their possible
causes and instructions on solving them.
Malfunction Possible causes Solution .
Brake does not Air gap too large Check and readjust air gap
release
Brake is not supplied Check electrical
with voltage connection
Voltage at the coil Check the supply voltage
too low of the coil
Armature plate obstructed Remove obstruction
Brake releases Air gap too large Check and readjust air gap
with delay
Voltage at the coil Check the supply voltage
too low of the coil
Brake does not Voltage at the coil Check the supply voltage
apply too large of the coil
Armature plate obstructed Remove obstruction
Brake applies Voltage at the coil Check the supply voltage
with delay too large of the coil
according to 3.2.2.4 is reached, a re-adjustment of the air
min
: see 3.2.2.1
bN
Version 08.2011 Page 21 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
6. Disassembly / Exchange
6.1 Removing the Brake
Removing the brake is the reverse of the assembly must only be done with the brake and motor
being switched off, de-energised and torque-free.
Î Danger!
The disassembly of the brake will result in a suspension of its holding torque. No risks must
be takes with said suspension!
6.2 Exchange of Components
The only component to be regularly exchanged on site is the rotor when it reaches the wear limit
(refer to 5.1.3.1); and if the hub shows signs of noticeable wear, it may be exchanged as well.
Furthermore, however, all the other components indicated under 6.4 Spare Parts may generally be
exchanged.
ÎAttention!
Before any re-assembly of the brake, check the fastening screws for damage and, if
necessary, exchange them!
6.3 Exchange of Brake / Disposal
Because of the different material components, the components of our spring-applied brakes have to
be disposed of for recycling separately. Moreover, pay attention to the official regulations.
Important AAV (List of Wastes Ordinance) key numbers are indicated below. Depending on the
material connection and the kind of separation, other key numbers may apply to components made
of such materials.
- Ferrous metals (key number 160117)
- Non-ferrous metals (key number 160118)
- Brake linings (key number 160112)
- Plastics (key number 160119)
6.4 Spare Parts
Illustration 6.1 shows all the spare parts that you can order for the spring-pressure brakes of the
FDB series indicated in the list below it.
When ordering spare parts, please always state the data from the brake lettering (see 3.1.1)!
ÎAttention!
For damage caused by other than original spare parts and accessories any liability and
warranty on behalf of PRECIMA Magnettechnik GmbH shall be excluded (refer to 2.3.3).
Version 08.2011 Page 22 of 23
Operating and Installation Instructions FDB (Getriebebau NORD)
Illustration 6.1:
Spare parts
(Sectional view)
Item Designation Item Designation
1.1 Magnet part cpl. design N 6.2 Hub for rotor 3.2
1.2 Magnet part cpl. design C 7 Flange
2 Armature plate 8 Friction plate
3.1 Rotor cpl. (Alu design) 9 Dust guard ring
3.2 Rotor cpl. (plastic design) 10 Adjusting ring
4 Springs 11 Fastening screw
5 Manual release cpl. 12 Hollow screws
5.1 Manual release lever 13 O-ring
6.1 Hub for rotor 3.1
Version 08.2011 Page 23 of 23
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