operating recommendations synchronous motors

OPERATING RECOMMENDATIONS

SYNCHRONOUS MOTORS February 2013

Motors

Operating instructions Page 1 February 2013

Synchronous motors Version 09

Index

Index ................................................................................................................................................. 1

1. Introduction ............................................................................................................................. 3

1.1 Objective 3 1.2 Safety 3

1.2.1 Security symbols 3 1.2.2 Basic instructions 4

2. Motors...................................................................................................................................... 5

2.1 Characteristics 5 2.1.1 Technology 5 2.1.2 Families of motors 6 2.1.3 Grade of protection 9 2.1.4 Characteristics plate 9

3. Transport and storage.............................................................................................................. 9

3.1 Transport 9 3.2 Storage 9

4. Installation and assembly....................................................................................................... 10

4.1 Environmental conditions 10 4.2 Positioning and fastening 11

5. Electrical connection .............................................................................................................. 11

5.1 Election of the type of power net 11 5.2 Motor connection – Protection of the coiling 12

5.2.1 Thermistors 13 5.2.2 Earthing 13 5.2.3 Short-circuiting between terminals 13

5.3 Connection of the brake 13 5.3.1 Description of the brake 14 5.3.2 Connection of the brake 14 5.3.3 Brake sizes 15 5.3.4 Micro switches –Regulation and ajustment 15

5.4 Encoder connection – Measuring system 16 5.4.1 Encoder ECN413 16 5.4.2 Encoder ERN487 16 5.4.3 Connection encoder-inverter 17

6. Traction rope.......................................................................................................................... 19

6.1 Traction rope 7x7+7x19W 19 6.2 How to handle the rope 19 6.3 Recommendations for the correct usage of the rope 21

6.3.1 Transport 21 6.3.2 Storage 21 6.3.3 Unwinding 22 6.3.4 Actions to avoid 22 6.3.5 Alignment and tension in the installation 23

7. Service and maintenance ....................................................................................................... 24

Motors



7.1 General 24 7.1.1 Fastening screws 24 7.1.2 Bearings 25 7.1.3 Traction rope 25 7.1.4 Pulleys 25 7.1.5 Brake (According to the norm EN81-1/12.4) 25

7.2 Emergency rescue operations 25 7.2.1 Manual rescue (please see norm EN 81-1/12.5.1) 26 7.2.2 Rescue with power supply “UPS” (norm EN 81-1/12.5.2) 26

7.3 Replacing the encoder (measuring system) 26 7.3.1 Disassembly 26 7.3.2 Assembly 26

7.4 Ajustment of the brake microswitches 27 7.5 Troubleshooting 28

8. Alignment............................................................................................................................... 29

8.1 NKL-70 tooling 29 8.2 Alignment of the guides 29 8.3 Positioning of the motor 29 8.4 Alignment of pulleys and fastening clamps 30

9. Rope-socket assembly............................................................................................................ 31

10. Annex 1. Bekaert Flexisteel Discard Criteria...................................................................... 32

Nork-2, S.L. reserves itself the right to amend or modify the content and details of its products

wihout prior notice. We expressly reserve the right to perform technical changes to improve the lifting

machines or to increase the security standard also without any type of special notice.

No liability will be accepted for damages, injuries or expenses that may be attributed to the

above mentioned reasons. We can not assume any guarantee as to the accuracy or completeness of the

documents.

Any reproduction, translation or copy, inclusive a resumme, needs the written authorization of

the company NORK-2 S.L.

Motors



1. Introduction

1.1 Objective

This manual provides the customer the necessary information for the connection and the

installation of the lifting motors KRON2 and KRON2US and the necessary specifications to operate and

for its maintenance.

The manual must be read by the installation and maintenance personnel.

The liability of NORK-2 is limited only to the motor and does not cover nor the system nor the

installation modes chosen by the customer.

1.2 Safety

The user should read and understand the present documentation before performing any

operation on the motor.

To prevent damages to the motor and its surroundings, the user should follow the security

instructions described and should comply with the prevention measures and the existing health and

safety legislations.

In case of any doubt or missing information regarding installation procedures, safety or any

other aspect, please get in touch with NORK-2 or its authorized distributor.

NORK-2 S.L. rejects any kind of liability for possible

accidents or damages to the material if the procedures

and safety instructions of this manual are not followed.

1.2.1 Security symbols

As follows we describe the security symbols which we use in this manual, in our products and

its significance:

Warning

Signals the danger of an electric shock for the user. It

can cause death.

Caution

Signals the danger for the equipment. It can be

destructive for the equiment. It can lead to a dangerous

situation for the user.

Caution

The magnetic component (rotor) should not be placed

near metallic parts or other magnetic components. The

attraction forces between rotor and stator are very

high.

Warning Do not lubricate. The presence of oil on the rope or

traction pulley can disable the installation.

Motors



Warning

Means strong magnetic induction; dangerous for the

user. The magnetic induction can cause irreversible

heart problems to persons with pacemakers, etc.

Caution

Do not approach sensitive elements and magnetic

inductors as watches, credit cards, etc.

Warning

Means that in the case that the corresponding warnings

are not followed, it can produce death, serious injuries

or considerable material damages.

Caution

Means sensitive device to ESD (Electrostatic discharge).

The user must take all necessary precaution to avoid

the ESD.

Warning

Means important information and warnings about

service. If not observed, damages, disturbances or

breakdowns can happen.

1.2.2 Basic instructions

The planning works, assembly and start can only de done by qualified personell and

training for the purpose.

The repairings of the motor can only be done by the manufacturer. An inadequate handling

can cause personal injuries, so as material.

The electric installation of the location should comply with the specifications which

guarantee the electric security of the motor.

The KRON2 motors must be powered through an inverter and not directly to the power

source.

The security brakes (certified) have been calculated for a limited number of emergency

brakings. These can not be used as a service brake.

When the rotor rotates, high peaks of tension can de produced.

The NORK2 motors are designed to be used in a closed room into which only the

customers authorized qualified technical personell has access.

Motors



2. Motors

2.1 Characteristics

2.1.1 Technology

The synchronous motors with permanent magnets offer great advantages over traditional

lifting machines.

The use of traction rope composed by very thin strands of high breaking load and embedded in

polyurethane, allows working with very small traction pulleys, obtaining very small machines which

optimizes space and consumption. The ropes need no lubrication and the user does not need to clean

himself, he will not loose time with the lubricants (revisions, incompatibilities, lubrication), nor will the

user have to watch out not to stain the rest of the elements of the installation.

Other particularities to be highlighted are the reduced noise emisions, the traction pulley has

no wear, a high grade of efficiency, etc.

Thanks to its design, the motors offer the best characteristics as:

o Compact and light

o Ecologic

o Precise and silent

o Secure

The synchronous motors with permanent magnets KRON2, KRON2US and KRON2USL are

manufactured entirely in our installations (rotors, stators, brakes, etc.). These motors do not need extra

ventilation.

The coilings of the stators, so as the coils of the brake and rotors are encased into resin in order

to improve the thermal performance and insulation. The interconnections are in the interior of the resin

and the connections are taken to the outside. The rotor assembly, including the magnets, is also

encapsulated in resin, contributing to a great compactness to the whole motor assembly.

The NORK-2 designs maintain a very high motor constant and a very low termal resistance.

Motors



2.1.2 Families of motors

2.1.2.1 MOTORS KRON2

12 poles

DIMENSIONS MOTOR S LOAD

[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX. LT L1 L2 L3

WEIGHT [kg]

1:1 160 - 225 KRON2.70 2:1 320 - 450

2.100 3 399 71 328 115 100

1:1 260 - 340 KRON2.105 2:1 525 - 675

2.100 5 449 86 363 150 115

1:1 400 - 450 KRON2.150 2:1 800 - 900

2.100 5 494 86 408 195 135

1:1 500 - 630 KRON2.225 2:1 1.000 - 1.250

2.700 7 591 108 483 270 160

1:1 800 KRON2.300 2:1 1.600

3.300 9 707 130 577 345 195

16 poles


[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX. LT L1 L2 L3

WEIGHT [kg]

1:1 1.000 KRON2.350 2:1 2.000

4.700 11 701 157 544 145 265

1:1 1.250 KRON2.400 2:1 2.500

4.700 11 776 157 619 182.5 285

Motors



2.1.2.2 MOTORS KRON2US

12 poles


[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX. LT L1

WEIGHT [kg]

1:1 160 - 225 KRON2US1.70 2:1 320 - 450

2.200 5 452 284 105

1:1 260 - 340 KRON2US1.105 2:1 525 - 675

2.200 5 488 320 120

1:1 400 - 525 KRON2US1.150 2:1 800 - 1.000

2.200 5 528 360 135

16 poles


[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX. LT L1 L2 L3 L4 L5

WEIGHT [kg]

1:1 630 - 675 KRON2US2.105 2:1 1.250

2.500 7 535 345 190 185 113,6 71,4 170

1:1 800 - 1.000 KRON2US2.180 2:1 1.600 - 2.000

3.700 9 654 424 230 225 130,6 94,4 220

Motors



2.1.2.3 MOTORS KRON2USL2 -MINIGEARLESS

22 poles


[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX. LT L1

WEIGHT [kg]

1:1 160 KRON2USL2.80 2:1 320

2.200 5 440 272 80

1:1 225 KRON2USL2.120 2:1 400 - 450

2.200 5 480 312 90

1:1 320 KRON2USL2.160 2:1 525 - 630

2.200 5 520 352 100

2.1.2.4 MOTORS KRON2USLHL2 -HOMELIFT

22 poles

BALANCE 50%


[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX.

ED LT L1

WEIGHT [kg]

385 3 KRON2USLHL2.80 1:1 300 620 4

20%ED 440 272 80

BALANCE 0%


[kg]

MAX. LOAD ON

SHAFT [kg]

No OF ROPES MAX.

ED LT L1

WEIGHT [kg]

385 3 KRON2USLHL2.120 1:1 300 620 4

20%ED 480 312 90

Motors



2.1.3 Grade of protection

The KRON2 lifting motors are designed with a protection grade IP44.

2.1.4 Characteristics plate

All the motors include a

plate in which all the

characteristics of the motor are

resumed.

It has to be revised as

soon as the motor is received and

secure that all the details

correspond with those of the

order and with those of the

installation were it will be

mounted.

You can not use a

motor in an

installation for which

it has not been

dimensioned.

3. Transport and storage

All our motors are individually checked on our test bench. Afterwards a visual inspection is

carried out to guarantee the correct supply.

If any kind of damage is produced during the transport, we recommend opening a damage

report in presence of the forwarder / transporter.

3.1 Transport

The transport must be carried out correctly observing delicate and conflictive elements of

the motor.

The eyebolt hitch is designed to hold the motor weight and it is forbitten to add extra

weights.

3.2 Storage

The storage must be done in spaces which are closed, dry, dust free, ventilated and without

vibrations. These can not be stored outdoors. With the time, those parts without surface coating rust

could appear.

Motors



4. Installation and assembly

After a long period of storage (> 4 months), turn the motor in both directions to a low

number of revolutions (< 30 min-1

). These operations will properly distribuye the grease on

the bearings.

Stator coils do not need any special drying treatment as these are “tropicalized” by

encapsulation in EPOXI resin.

It is essential that the base or frame on to which the motor is to be installed has been

correctly calculated.

The assembly and electrical installation, as well as the start of the machine must only be

performed by qualified personnel.

Cover the motor with a plastic in order to project it against dust, shavings, etc., paying

special attention to the electromagnetic brakes, microswitches, etc.

The measuring system (encoder) is only accesible from one side. Please install the motor

with sufficient space from the wall, so that you can work on it and change it if necessary.

4.1 Environmental conditions

The installation must comply with the following room conditions:

o Maximum altitude of installation: 1.000m a.s.l.

o Ambient temperature: -5oC to 40

oC.

o Maximun relative humidity: 85% to 20oC (without condensation).

The location of the motor must be done in such a way that the ventilation of the motor is

not obstructed by any way of convection or radiation.

The motor torque indicated in the different lists is valid for a room temperatura and assembly

heights as indicated before. If differences are observed, the reduction factor “K” must be applied as per

following graphic:

Motors



4.2 Positioning and fastening

To reduce vibrations in the installation it is necessary to use dampers, preferably

polyurethane foam. A study must be carried out to perform a study of the loads and chose

the dimension and density of the polyurethane to be used.

The screws to fasten the motor to the motor frame will require a tightening torque

dependant on their metric size.

It is important to align the traction pulley with the deviation pulleys and the fastening

clamps. For this, a good positioning of the guides is essential. We recommend to use the

tool NKL-70 which facilitates the installation and the later inspection (please see the

instructions in point 8).

5. Electrical connection

The electric installation must be done only by qualified personnel.

Before starting to work on the motor, make sure it is disconnected from the voltage

supply.

The connectors must be dust-free, without moisture and free of any foreign particles.

The motors insulation system is designed so that it can be connected to a converter with a

maximum continuous voltage of 700 VDC.

5.1 Election of the type of power net

The present norms do not demand the choosing of an type of power net (ECT) and these are

selected according to the working requirements (continuity of service compulsory due to safety reasons,

due to location problems, frequent storms, external commutation processes, etc.).

The KRON2 motors are approved, in general, to work with “TN” and “TT” networks with

neutral to earth and “IT” networks. Nevertheless, the referenced motors can only be

connected to the electrical network by means of an inverter and this connected to the

electric network using a “residual current device” (RCD), according to DIN VDE 0100-300:

1996-01.

The compatibility between equipments and these protection devices must be certified

(please see norm EN50178 chapter 5.2.11.2).

On phase to earth conductors an insulation transformer with neutral to earth (on the

secundary) must be connected between the network and the drive and the network to in

order to avoid an excessive charge on the motor insulation.

Usually the “TT” networks count with a phase to earth conductor. In this case an insulation

transformer (galvanic insulated) must be used.

On “IT” networks, the appearance of a first defect between an active part and earth must

be signposted through a surveillance device. According to “IEC 60364-4-41” it is

recommended that the 1st defect must be solved as fast as possible.

Motors



5.2 Motor connection – Protection of the coiling

The electrical connection of the motor and the thermistor (temperature controller of the stator

coils) is made through a 6 poles rotary connector attached to the motor. The connector and the motor

exit rope of the motor must be connected.

MOTOR CONNECTOR

KRON2.70...225

KRON2US

MOTOR EXIT ROPE

PIN SIGNAL SECTION

1 (1) U (Black)

2 (2) V (Black)

6 (3) W (Black)

EARTH

(Yellow-Green)

2,5mm2

4 SENSOR TENP.

(White)

5 SENSOR TENP.

(Black)

1,5mm2

SHIELD

MOTOR CONNECTOR

KRON2.300...400

MOTOR EXIT ROPE

PIN SIGNAL SECTION

U (1) U (Black)

V (2) V (Black)

W (3) W (Black)

EARTH

(Yellow-Green)

6mm2

+ SENSOR TENP.

(White)

- SENSOR TENP.

(Black)

1,5mm2

SHIELD

The rope connection of the motor has to be shielded. The shield contacts with the connector

housing on one side and with the inverter mass on the other.

The motor phases U-V-W must coincide with the inverter phases U-V-W of the inverter. These

can not be interchanged.

Motors



5.2.1 Thermistors

The STM-150.DS thermistor is a component that depending on

the temperatura variations produces strong variations of the ohmic value.

The reference temperature is 150oC.

In the motors Kron2 and Kron2US it is situated in the winding

and this way it informs the stator of the temperatura changes.

When three STM-150.DS thermistors are used in serie (see

diagram) the resistance variation of each thermistor is approximatelly one

third of its value, causing a resistance variation in the values indicated in

the diagram.

5.2.2 Earthing

For safety reasons, the earth connection must be done very carefully.

The motor shall be connected to earth with its corresponding terminal and the yellow-

green rope must be connected to an earth screw.

5.2.3 Short-circuiting between terminals

The short-circuiting between motor terminals is used to obtain a slow displacement of the

cabin, having opened the brake manually or electrically.

5.3 Connection of the brake

The security brakes type “CR” act on the single axis of the traction pulley as a protection device

against the uncontrolled upwards and downwards movements of the cabin.

Since they are security brakes, only qualified personnel are allowed to perform assembly,

adjustment or maintenance works.

The partial supply of the brakes is done with continuous voltage coming from the

controller unit.

Motors



5.3.1 Description of the brake

The security brakes types CR basically

are formed by a fix plate, two bodies with coils

and a brake disc.

Hereto belongs the fixing and guiding

elements, connection and control.

5.3.2 Connection of the brake

The connections of the coils of the brake and the control terminals end in the base connector

and to this connector you should connect an exterior rope called “brake outlet rope” (see picture).

BRAKE CONNECTOR

BRAKE OULET ROPE

SOLUTION 1

CONNECTION – DISCONNECTION BY THE AC SIDE

Recommended for “normal service”.

When the brake acts, the motor has tension,

but to zero revolutions. The brake connection

happens very quietly. During disconnection the

brake “falls” slowly and very quietly.

SOLUTION 2

CONNECTION – DISCONNECTION BY THE DC SIDE

Recommended for emergency braking

or inspection. This mode the “fall” of the brakes

is fase and with more noise, obtaining this way

a minor movement of the cabin.

Motors



5.3.3 Brake sizes

FRENO

DIMENSIONS

(H x A x F)

[mm]

MOTOR

CR200 210 x 210 x 86,4

Kron2-70

Kron2US1-70

Kron2USL2

Kron2USLHL2

250 x 226 x 86,4

Kron2US1-105

Kron2US1-150

CR236

250 x 270 x 86,4

Kron2-105

Kron2-150

Kron2US2-105

CR270G 280 x 280 x 86,4

Kron2-225

Kron2-300

Kron2US2-180

CR290G 300 x 296 x 101,4

Kron2-350

Kron2-400

5.3.4 Micro switches –Regulation and ajustment

The micro switches are delivered already regulated and sealed from factory. These shall not be

manipulated. Our technicians follow a regulation and controlling process which guarantees the correct

functioning.

The micro switches used in the brakes CR are bilevel with AgCdO or AgSnO2 AgNi terminals.

Motors



5.4 Encoder connection – Measuring system

5.4.1 Encoder ECN413

No. of pulses: 2.048 Service tension: 5V Interfaz: En Dat.

PIN SIGNAL COLOR ENCODER CONNECTOR

1 SENSOR Up BLUE

2 - -

3 - -

4 SENSOR Ov WHITE

5 - -

6 - -

7 Up (5v) BROWN-GREEN

8 CLOCK (+) VIOLET

9 CLOCK (-) YELLOW

10 Up (Ov) WHITE-GREEN

11 SHIELD A+ A-B+B-

12 B + BLUE-BLACK

13 B - RED-BLACK

14 DATA (+) GRAY

15 A + GREEN-BLACK

16 A - YELLOW-BLACK

17 DATA (-) PINK

5.4.2 Encoder ERN487

No. pulses: 2.048

Service tension: 5V

Signals: 1 signal sine & cosine with 1

period/turn (Z1 TRACK).

PIN SIGNAL COLOR ENCODER

CONNECTOR 1 SENSOR Up BLUE

2 R - BLACK

3 R + RED

4 SENSOR Ov WHITE

5 - -

6 - -

7 Up (5v) BROWN-GREEN

8 D - VIOLET

9 D + YELLOW

10 Up (Ov) WHITE-GREEN

11 SHIELD A+ A-

B+ B-

12 B + BLUE-BLACK

13 B - RED-BLACK

14 C + GRAY

15 A + GREEN-BLACK

16 A - YELLOW-BLACK

17 C - PINK

Motors



5.4.3 Connection encoder-inverter

Motors



Motors



6. Traction rope

6.1 Traction rope 7x7+7x19W

o Minimum braking load: 28kN

o Friction coeficient: µ=0,25

o Outer wrapping: clockwise direction.

o Usage of Ø150 or smaller pulleys.

The traction rope is used with a ratio “diameter pulley/diameter rope” of D/d= 40 (Norm EN81).

But, due to the excellent results of fatigue it is feasible to use a coefficient lower than 30, even 20.

The excellent results of resistance and fatigue of our rope and its long life time are due to the

fact that no contact exists between the ultra resistant strands of the rope and the steel of the traction

pulley thanks to the polyurethane coating. This coating gives also a great comfort to its way through the

traction pulley disappearing noises, vibrations, etc.

The rope has a very high longitudinal stiffness. This is why the entry of persons into the cabin

causes a very slight change in position and the stop accuracy is excellent, together with the joint act with

the CR brakes.

The traction is clean and the maintenance and the changes are faster as no lubricant is needed:

the technician does not get durty and doesn´t have to be aware of not staining and cleaning the rest of

the components.

6.2 How to handle the rope

As follows we have setup the principle attention points valid for all the ropes for lifts:

1. By unpacking the rope, never pull sideways from the spool. Leave the spool turn and take out

the rope straight of the spool.

2. Avoid knots in the rope during its unwinding. In the case it happens do not intend to undo it by

pulling on the rope because this will inevitably produce damages in the rope. The only way to

eliminate it, is by turning the end of the rope.

The PU coated rope must be handled with some additional care:

1. It is recommended to unwind the rope only immediatelly after having introduced it in the

elevator shaft in order to prevent any kind of contamination.

2. Do not use any sharp tools in order to open the packaging because it can damage the coating of

the rope.

3. If for some reason, the rope is covered by dust (concrete, cement, sand, etc) it is necessary to

remove with a cloth.

4. Prevent damages on the rope avoiding its friction against sharp edges when winding, unwinding

or inserting the rope into the elevator shaft. In the case this happens, carefully check the coating

conditions along the entire rope. If any damage is seen (for example a notch, groove or cut)

replace the rope by a new one.

Motors



5. Do not get the rope or any other part of it in contact with grease, oils or lubricating substances

(standard gasoline, diesel, etc). This can cause loss of traction. In the case that an accidental

contact happens with a lubricant, please clean the rope carefully. This cleaning can be done with

the following product which does not damage the polyurethane coating: isopropyl alcohol.

6. Avoid contact with any substance which can damage the exterior coating of the rope. As follows

a list of products which should not come into contact with the rope:

a. Dimetilformina.

Tetrahidrofuran.

N-menil pyrrolidone.

Toluene

These products cause partial or total dissolution of the coating (or other

solvents, as for example: esters of short chain and halogenated hydrocarbons which

can cause swelling of the polyurethane coating. The process of expansion and the

associated effect on the resistance are reversible).

b. Alcohols: the alcohols can degrade la coating through alcoholises, especially at high

temperaturas (> 80 o

C.). For cleaning purposes use only isopropyl alcohol.

c. Hot water (>60 o

C) causes a gradual hydrolytic degradation of the coating.

d. Fossil fuels that contain alcohol or aromatic fuels (example: Premium fuel)

e. Acids and álcalis (a brief contact is possible is the contact area is immediately cleaned

with cold water).

7. The rope must not enter in contact with heat sources because the polyurethane coating can

melt. Furthermore, the rope must be stored in conditions in which the room temperature does

never surpass 40oC.

8. The grinding and welding (both arc welding, laser, TIG, gas, etc) near the rope are strictly

prohibited. Sparks, molten metal chips and similars can damage the polyurethane coating.

9. The rope must be completely vibration-free and loose throughout its length into the traction

pulley. If this is not the case, the outer coating can be damaged. A detailed analysis of the rope is

needed and if a defect is found, the rope must be replaced by a new one.

10. The coated rope can only be used in a pulley designed for coated ropes. This pulley has a round

groove without inner slot and has a special surface treatment.

11. It should meet the long-term requirements of EN81-2001 on rope trasmisions. The junction of

the rope termination shall be 80% of the minimum breaking load of the rope. Terminations

(wedge shots) used with this coated rope must be specialy designed to hold coated ropes. If this

is not the case, the rope can get out of the clamps. The clamps must show the correct diameter

which corresponds to the external diameter of the rope. The needed protection of traction

pulleys shall be given in order to prevent suspension of derailments, kinks and so on.

Motors



6.3 Recommendations for the correct usage of the rope

6.3.1 Transport

► Dangerous and incorrect:

Any of these options can damage the outside coating of the rope. The contact with the truck

blades is dangerous.

► Correct: These are different options for the correct transport avoiding the direct contact on the rope.

6.3.2 Storage

► Dangerous and incorrect: ► Correct:

Maintain the ropes clean and dry on the pallets. The spools can not be stored outdoors during

long periods of time and it is necessary to cover them to prevent deterioration. Assure correct

ventilation in order to avoid condensations.

Motors



6.3.3 Unwinding


► Correct:

The incorrect unwinding of a spool can cause mainly knots and torsions which have an influence

in the life of the rope. The rope must be inert and never in tension or twisted.

6.3.4 Actions to avoid

► Dangerous and incorrect: ► Correct:

The friction caused by edges and the continuos movement of the rope cause irreparable

damages, so it is highly recommended to protect them during the handling of the rope so as during its

own installation.


Avoid sharp objects and activities that can produce sparks near the rope.

Motors



6.3.5 Alignment and tension in the installation

It is imperative to ensure that the installation of the rope is correct in order to obtain the

maximum efficiency and the longest useful life time of the ropes. The following aspects have to be taken

into account:

► Dangerous: ► Correct:

In order to obtain a correct installation, it is necessary to level the motor which is obtained by

checking the position of the ensemble by means of a leveller. In the drawings we show the levelling of

the motor with its frame used for modernizations.

► Dangerous:

Avoid the lateral deviation of the ropes when they exit the pulleys. This provokes turns in the

rope and reduces its life, mainly with turns in opposite directions (prescind unnecessary pulleys). The

rope must be set up as aligned as possible.

► Dangerous: ► Correct: ► Dangerous: ► Correct:

In order to avoid lateral deviations, verify that the traction pulley and the deviation pulley are

aligned. Also, centre each pulley with its corresponding fastening clamps.

Note: exaggerated images

for illustrative purposes

Motors



It is very important to remember that this rope MUST NOT BE LUBRICATED. Thanks to its

design and configuration of the rope, we guarantee an excellent interaction between the

rope and the pulley and avoid problems which arise due to the lubrication: inicial

lubrication, revisions, chemical incompatibility, differences between theoretic and real

traction, grease removal, etc.

In the case the rope is accidentially soiled, please clean it with ISOPROPYL ALCOHOL, avoiding

the rope to glide on the traction pulley.

► Dangerous: ► Correct: ► Dangerous: ► Correct:

Verify that all the ropes have the same tension and that none of them has been twisted during

its installation [the marking on the exterior coating of the rope can be used as reference for a correct

alignment]. The control of the tension must be done during the installation and shall be repeated 4-6

weeks afterwards. Carry out several measurements in each case until a value is obtained that maintains

itself constant during several consecutive further measurements.

7. Service and maintenance

7.1 General

The customer is responsable to carry out the correct assembly from the technical and

safety point of view. The customer also has to do the controlings of the security

components and the inspections and the maintenance in accordance with the norms on

elevators.

The repair of the motors has to be done by qualified personnel. The motors are

maintenace-free and only need a brake control.

7.1.1 Fastening screws

It is not necessary to revise the tightening of the screws as they all are accompanied by security

washers type NORD-LOCK.

Motors



7.1.2 Bearings

None of the bearings in the motor and in the deviation pulleys need maintenance. These are

sealed bearings and need no adicional lubrication.

7.1.3 Traction rope

The rope needs no lubrication (prohibited), so that it needs no revision of the situation of the

lubricant, or an analysis of incompatibilities. Revise marks and deterioration.

7.1.4 Pulleys

Revise the pulleys in order to detect notches which can affect the rope.

7.1.5 Brake (According to the norm EN81-1/12.4)

The checking of the brake shall be done when the cabin is located approximately halfway of the

travel of the installation. The switch which short-cuts the stator unwinding must be disabled in order to

verify individually the efficiency of the brake.

7.1.5.1 Overload (EN81-1/12.4.2.1)

The brake must be able for itself to stop the motor when the cabin goes down at its nominal

speed with a nominal load increased by a 25%. Under these conditions the deceleration of the cabin

shall not surpass the resultant of the action of the parachute or the impact against the dampers.

7.1.5.2 Control of the brakes

The installed brakes are of doble action so as the norm EN81-1 demands. Each brake,

individually, must be able to decelerate the cabin with a nominal load and a nominal speed.

In order to simulate the correct individual functioning of each brake, it is necessary to

disable one of them and proceed to make operations with the other one. Observe the

correct functioning and afterwards perform the reverse operation. Revise also the correct

functioning of the micro-switches. Any error in the signal of the micros must not allow the

functioning of the cabin.

7.2 Emergency rescue operations

If a failure in the network happens and the cabin has stopped between two floors, it is

necessary to perform a rescue.

We mention two rescues, but with an independant power supply it is possible to make other

rescues which we can not count.

Motors



7.2.1 Manual rescue (please see norm EN 81-1/12.5.1)

The procedure for a manual rescue is as follows:

o Short-circuit the coils of the stator. This

action prevents an uncontrolled

acceleration of the cabin.

o Remove angular “N1”. Automatically the

series of security will open, leaving inactive

all the installation.

o Introduce the wheel drive.

o Operate the actuator in the direction

indicated by the arrow. Manual opening of

the brake occurs.

o Turn the wheel drive in the favourable

direction (upwards or downwards) until the

cabin arrives to the floor.

7.2.2 Rescue with power supply “UPS” (norm EN 81-1/12.5.2)

The procedure to be followed is:

o Short-circuit the stator coils avoiding an uncontrolled acceleration of the cabin.

o Open the brakes through the power supply “UPS”. The cabin moves upwards or downwards

direction until the cabin arrives the floor.

7.3 Replacing the encoder (measuring system)

The encoder must be removed when it is certain that it has a defect.

7.3.1 Disassembly

1. Loosen the hexagonal 2 mm interior

screw.

2. Loosen screw cap.

3. Loosen (turn 360º) the interior 4mm

hexagonal screw.

4. Introduce hexagonal screw M 10; tighten

to unlock the cone of the encoder.

5. Remove hexagonal interior M10 screw.

6. Remove hexagonal interior M5 screw.

7. Remove encoder.

7.3.2 Assembly

1. Locate encoder in the tapered bore.

2. Tighten M5x 50 DIN6912 screw (5 Nm).

3. Place closing end cap (5 Nm).

4. Tighten hexagonal interior 2 mm screw

(1,25 Nm).

Motors



7.4 Ajustment of the brake microswitches

The micros are preset at factory and it is not necessary to modify the regulation. If necessary,

please proceed as follows:

(Brake without voltage)

1. Connect the multimeter 5 between the blue and black ropes of the micro 4 .

According to the schema in paragraph 5.3.2 the connection between the blue and black

rope shall de done as follows:

MICRO 1 - between pin 9 and 7

MICRO 2 – between pin 9 and 8

The drawing section 5.3.1, Description of the brake, clarifies the designation of MICROS 1 and 2.

2. Bring the regulador screw closer 1 until the micro 4 acts.

3. Pretense the spring washer 3 by turning the counternut 2 .

4. Turn back the regulador screw 1 until the micro does not function any more.

5. Softly turn the regulador screw 1 until it is set back 0.1mm more, approximatelly 1/7 of turn [the

hexagonal sides of the screw serve as reference. Pitch 0.8mm, 6 faces. 0.8/6=1.3mm/turn face].

6. Fix the nut.

7. Revise varios times in order to ensure its correct ajustment.

Motors



7.5 Troubleshooting

EVENT CAUSE RECOMMENDED OPERATION

- The motor is not connected to

the correct phase.

- Connect correctly the motor phases.

- Measuring system is not

correctly connected.

- Connect correctly the measuring

system.

- Incorrect introduction of the

parameters of the inverter.

- Verify the parameters of the inverter.

-EMC perturbations. - Perform shield measure and earthing

according to inverter instructions.

- Offset angle adjustment of the

measuring system is not correct.

- Control the angular offset of the

measuring system.

The motor does not

work; it works

uncontrolled or the

torque of the machine

is not achieved.

- Faulty encoder. - Replace the encoder.

- Faulty bearing. - Call custom service.

- Inverter parameters incorrect. - Check inverter parameters. Noises from the motor.

- Faulty encoder. - Replace the encoder.

- Brake system does not receive

voltage.

- Check electrical connection.

- The tension of the

electromagnets is too low.

- Control the tension of the

connections of the electromagnets.

Brake system is not

released.

- The brake is mechanically

blocked.

- Remove mechanic blockage.

The brake system does

not function.

- The brake is blocked

mechanically.

- Remove mechanic blockage.

Brake system functions

late.

- Disconnection time on

continuos current connection is

insufficient.

- Control connection on continuos

current of the over-excitation rectifier.

- The continuous current switch is

in “normal service”.

- Change brake control switch of

continuous current to “normal

service”.

Connection noise of

the lifting brake.

- The brake gap is too big. - Replace brake disc.

- Brake surface or cover dirty. - Clean brake surface / cover.

- Strange objects between the

brake surface and the cover.

- Remove strange objects.

Braking moment too

low. - Brake surface or cover has been

in contact with oil or products

containing grease.

- Replace brake and perfectly clean the

surface of the brake.

Motors



8. Alignment

We strongly recommend the installations having aligned pulleys,

without turns of 90º which produce side deviations of the rope in the

pulley. Avoid the turns and use only the necessary pulleys.

In order to ensure a correct and long useful life of the ropes, it is imperative to have a good

alignment of the pulleys and fastening clamps. Herefore, the installation should be correctly aligned,

starting with the guides. For its assembly and supervisión we recommend the usage of the NKL-70 tool.

8.1 NKL-70 tooling

The NKL-70 tool is a mechanism which sends a laser beam. This light projects as a line on to the

surfaces which serves as a centering and aligning reference. On the opposite side it has two bolts

actuated by springs which permits its positioning and together with the inner magnet, ensures a correct

coupling.

The laser NKL-70 is an ideal tool for the alignments during the assemblies and in order to verify

the correct position of the installation elements afterwards.

8.2 Alignment of the guides

As the whole installation is focused on the guides, it is basic they are correctly aligned. In order

to align, please use the NKL-70 tool, situating the proyector in one of the guides and the receptor on the

other guide. Verify that the laser line is straight and centered.

8.3 Positioning of the motor

It is necessary to level the motor which is

obtained by checking the placement of the assembly by

means of a leveller (pictures show levelling of the motor

with frame for modernizations).

Note: exaggerated images for illustrative purposes

Motors



8.4 Alignment of pulleys and fastening clamps

In order to avoid lateral deviations between the ropes and the pulley, you have to verify that

each pulley is centered in regard to its corresponding fastening clamps. Also, you have to ensure that

the traction pulley and the deviation pulleys are aligned (when needed).

In order to obtain a correct alignment we recommend using the NKL-70 device.

Motors



9. Rope-socket assembly

Motors



10. Annex 1. Bekaert Flexisteel Discard Criteria

Motors



operating recommendations synchronous motors

Documents