Clavis CLAVIS Type 4 Meter

CLAVIS Belt Tension Gauging Equipment

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The CLAVIS hand held Belt Tension Meter (Type 4)

T he

The industry standard meter now has an enhanced specification: -

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•

•

•

•

•

•

30-600Hz Range

Clavis Patented sensor

160 hour battery life

Meter calibration checker

Interchangeable sensors

Carrying case

Calibration Certificate

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Integrated Display Systems Ltd., England, Tel: +44 (0)191-2620091


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The Clavis hand held beltmeter can be used for all belt tension gauging applications.

It produces readings which accurately reflect the tension in the belt, consistently and without operator skill. CLAVIS tension meters were introduced in 1988.

The equipment consists of a small sensing head which is held a cross the belt to be measured. The belt is then tapped to induce the belt to vib rate at its natural frequency. The vibrations are detected and the frequency of vibration is then displayed on the measuring unit.

The unit is suitable for measuring tension in all types of power transmission belts, ranging from toothed timing belts, poly-vee belts, and simple vee belts. The frequency measurement range is from 30Hz to 600Hz whi ch covers most automotive applications. A general purpose head is supplied. A range of interchangeable sensing heads with differing dimensions is available upon request.

A low frequency range Type 3 beltmeter is also available with a frequency measurement range from 10Hz to 300Hz. This meter is useful for wide belts with large spans. An optical sensor head (which only needs access to one side of the belt from distances of up to 50mm) may be used with this meter to extend the frequency range down to 4Hz.

Theory of operation

The Clavis belt tension meter measures the natural frequency of vibration of a belt span. This frequency is directly related to the tension in the belt. As the tension in the belt is increased the frequency of vibration also increases.

The relationship between the measured frequency and the tension of the belt should be determined from a calibration test on the belt span. A Clavis calibration rig is available for those users of this instrument who wish to perform their own calibrations, or we can undertake your calibration in our laboratory. Alternatively the relationship between belt tension (T) and frequency of vibration (f) may be calculated from knowing the mass per unit length of the belt (m), and the belt span

(l), using the expression;

T = 4 m l

2 f

2

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Where T is in Newtons, F in Hertz, I in metres, and m in Kg/metre. However as the belt does have some flexural stiffness the predicted tension for a given frequency will be slightly greater than the actual tension. This is most noticeable on short belt spans where the belt bending stiffness is the greatest. For belt spans greater than

250mm a calculation based on the above expression will provide results within 10% of the actual values.

Operational Use

1. Connect the sensing head to the lower central socket, and turn on the unit by pressing the ON/OFF button.

2. Hold the sensing head steady across the belt span.

3. Tap the belt gently near mid span using the handle of a small screwdriver or similar, to cause the belt span to vibrate.

4. The meter will now display the frequency of vibration, and BLEEP to indicate that a valid reading has been taken.

5. If a reading is not obtained check that the sensing head is not touching the belt, and try again.

Rechargeable batteries provide 40 hours of operation (dry batteries provide 160 hours). The meter automatically switches off 10 minutes after the last reading is taken, to prolong battery life. A 'LO BAT' indicator on the display shows when the unit needs recharging. The charging socket is adjacent to the sensing head connector. An overnight charge will fully restore the batteries. During charging the

'LO BAT' indicator will flash. The meter may be powered directly from the charger if required.

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Additional notes

The range of the meter is from 30 to 600Hz. Readings below 30Hz will cause the display to flash '030' and then clear to '000'. Readings above 600Hz will cause the display to flash '600' and likewise clear to '000'.

In most applications the meter is used to make comparative tension checks. Often two or three spans may be available on which to take measurements. As the frequency depends upon the span length, the span to be used for measurement must be defined. Normally it is found that the longer spans are easier to vibrate than the very short span lengths. If the belt tension adjuster is on the measurement span, ensure that the variation in span length created by the adjuster will not be significant.

Calibration

The Clavis Belt Tension Meter is based upon a microprocessor using digital signal processing techniques. A 8.0000 MHz quartz crystal provides the fundamental frequency reference which should ensure, for the life of the instrument, an accuracy of;

+ or - 1 digit below 100Hz

+ or - 1% of reading above 100 Hz

A high precision steel resonator is supplied for an easy spot frequency check of calibration. The resonator should be tapped on a hard surface and held steady between the jaws of the sensor. The meter should read 250Hz with a to lerance of

+ or - 1%. It is important that both the sensor and the fork are held still, otherwise doppler frequency change may occur due to relative motion.

However as with all gauging equipment a more comprehensive calibration check should be made periodically. A Clavis Belt Tension Meter Calibrator is available for this purpose, or the unit may be returned to the manufacturer for a calibration check and the issue of a certificate of calibration.

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The

Introduction

The correct tension in a drive belt is essential to maximise the life of the belt and the drive components. Slippage in timing belts due to the tension being too low can have catastrophic consequences. The CLAVIS hand held Beltmeter introduced in 1988 is a significant advance by applying acoustic principles to belt tension measurements.

The meter produces readings which accurately reflect the tension in the belt consistently without any operator dependence. The device is in use throughout the world, both as a production tool for accurate belt tension setting, and as a quality

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_________________________________________________________________________________ control gauge. The CLAVIS belt tension meter is both approved and recommended by all of the major manufacturers of drive belts. The sensor head is a CLAVIS patented design and offers superior performance over any other meter of this type

Method of Use

The equipment consists of a small sensing head which is held across the belt to be measured. The belt is then tapped to induce the belt to vibrate a t its natural frequency. The unit is suitable for measuring tension in all types of power transmission belts, ranging from toothed timing belts, poly-vee belts, and simple vee belts. A general purpose sensor head is supplied, however a range of sensing hea ds of differing dimensions are available upon request.

Newton Display Version

The TYPE 6 version of the meter has all the capability and functions of the Type 4 meter but with the following additional facilites.

The frequency range is from 10.Hz to 600Hz, which will cover virtually all belt tension measuring applications.

The display may show the belt tension in Newton Force units of measurement.

This value is calculated from the belt span and belt mass data, which is entered into the meter. Up to 3 sets of data may be stored in the meter for easy recall. The display may be changed from a Hz to a Newton Force reading by the press of a single key. Rechargeable batteries provide 30 hours of continuous operation.

Automatic power off occurs 2 minutes from the last use of the meter. A carrying case and a mains supply charger is supplied with the meter.

(Alternatively the TYPE 5 meter is available which produces a kgF display)

Specification

Model No

Range

Accuracy

Span Range

Mass Range

Temperature

Weight

TYPE 6

10.0 - 600Hz, 10 – 9999 Newtons

+/- 1% (100 - 600Hz),

+/- 1 digit (10 - 100Hz)

0.001 - 0.999m

0.001 - 0.999kg/m

-10 to 60 degree Celcius

280g

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Key Functions

This key is used to turn the meter on and off. Pressing the key once switches the meter on, pressing this key a second time switches the meter off. The meter will automatically switch off 10 minutes after the last reading has been taken.

This key is used to set the span when a result in Newtons is required. The span key should be held down, and the UP or DOWN keys used to set the span length in metres. Pressing the span key alone, shows the current belt span.

This key is used to set the mass when a result in Newtons is required. The mass key should be held down, and the UP or

DOWN keys used to set the mass of the belt in Kg/metre. Refer to the table of Kg/metre values for further assistance for determining this value. Pressing the mass key alone shows the current belt mass.

This key has two functions. The first use is to increase either the

SPAN or MASS parameters when used in conjunction with these keys. The second use is to switch back to the Hz measurement mode, from the Newton mode. The meter always enters the Hz measurement mode when switched on.

This key has two functions. The first use is to decrease either the SPAN or MASS parameters when used in conjunction with these keys. The second use is to switch to the Newton measurement mode. For valid Newton results the SPAN and MASS parame ters of the belt must be set. If a ‘000’ Newton reading is displayed accompanied by 3 BEEPS’, this indicates that the Newton result is out of range.

MEM1 to MEM3 provide 3 identical memory functions for saving the parameters of 3 frequently used belt types. To save the parameters of a belt, the SPAN and MASS must first be set by using the above keys. After either the SPAN or MASS keys have been used, the appropriate MEM key should be pressed. The MEM key should be pressed before the SPAN or MASS value is cleared from the display, which occurs after 3 seconds.To recall a saved entry, the appropriate

MEM key should be pressed. The recalled parameter can be displayed by pressing the SPAN and MASS keys.

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4T2.5-DL

6T2.5-DL

10T2.5-DL

6T5

10T5

16T5

25T5

6T5-DL

10T5-DL

16T5-DL


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Definition of SPAN and MASS

SPAN: The span is measured from the point of contact on one pulley to the point of contact on the other pulley. It is NOT the centre distance between pulleys.

MASS: The mass parameter is the mass per unit length of the belt measured in kilograms per metre. It may be determined by weighing the belt in kg, and dividing the result by the total length of the belt in metres. The table below details the MASS for generic synchronous belts. (See also the table at the end of this document for

Gates belt data).

BELT TYPE

4T2

MASS kg/m

.004

6T2

10T2

.007

.011

4M

6M

10M

4T2.5

6T2.5

10T2.5

.005

.007

.012

.006

.009

.015

BELT TYPE

25T5-DL

16T10

25T10

32T10

50T10

75T10

100T10

32T10-DL

50T10-DL

MASS kg/m

.068

.077

.120

.154

.240

.360

.480

.182

.285

BELT TYPE

25AT5

32AT5

50AT5

16AT10

25AT10

32AT10

50AT10

75AT10

100AT10

MASS kg/m

.085

.109

.170

.101

.158

.202

.315

.473

.630

.024

.038

.060

.006

.010

.016

.014

.016

.027

.043

16T10-DL

25T10-DL

32T20

50T20

75T20

100T20

32T20-DL

50T20-DL

10AT5

16AT5

.091

.143

.269

.420

.630

.840

.355

.555

.034

.054

32AT20

50AT20

75AT20

.339

.530

.795

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RS232 Serial Port

The format of the RS232 serial output is as follows;

Data Bits:

Stop Bits:

8

1

Parity:

Baud Rate:

NO

9,600

Each time a measurement is successfully taken, the meter after the 'BEEP', transmits the ascii character string. The following are examples of transmitted output for the alternative meter modes;

Hz Mode:

10.0 HZ

75.8 HZ

103 HZ

Kgf Mode (Type 5):

06.2 KGF

27.8 KGF

843 KGF

Newton Mode (Type 6):

0010 N

0287 N

6523 N

Between the numeric value and the units of measurement there is an ascii space character (decimal 32). Each character string is terminated by an ascii 'Carriage

Return', (decimal 13)

When the meter is first switched on, an identifying message string is transmitted of the following form;

CLAVIS TYPE 5 - REV 6.071294 or CLAVIS TYPE 6 - REV 7.010699

Calibration

All Clavis Belt Tension Meters are supplied with a certification of calibration valid for one year.

The meter is based upon a microprocessor using digital signal processing techniques. A 8.0000 MHz quartz crystal provides the fundamental frequency reference which should ensure, for the life of the instrument, an accuracy of;

+ or - 1 digit below 100Hz

+ or - 1% of reading above 100 Hz

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A high precision steel resonator is supplied for an easy spot frequency check of calibration. The resonator should be tapped on a hard surface and held steady between the jaws of the sensor. The meter should read 250Hz with a tolerance of

+ or - 1%. It is important that both the sensor and the fork are held still, otherwise doppler frequency change may occur due to relative motion.

However as with all gauging equipment a more comprehensive calibration check should be made periodically. A Clavis Belt Tension Meter Calibrator is available for this purpose, or the unit may be returned to the manufacturer for a calibration check and the issue of a certificate of calibration.

Standard Accessories supplied with the Type 6 Meter

Type 6 Meter

Universal Type 3 sensing head

Rechargeable Batteries

Battery Charger

Carrying Case

Calibration Resonator

Certificate of Calibration

Manufacture and Warranty

All CLAVIS belt tension measuring and setting equipment is designed and manufactured in England by;

Integrated Display Systems Limited,

Maurice Road,

Wallsend,

Tyne and Wear,

NE28 6BY.

Tel: +44 (0) 191 262769

Fax: +44 (0) 191 2620091

Email: [email protected]

Web: www.clavis.co.uk

All of the handheld tension meters include a warranty for a period of 12 months from the date of purchase.

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Introduction

The Type 14 meter is housed in a rugged ergonomic housing which has been CNC machined from aluminium billet. This meter is therefore an ideal tool for use on a production line. The integral sensor head rotates so that the display may always be in the field of view of the user, irrespective of belt alignment. Any CLAVIS sensor may be plugged into the base of the meter if access using the integral sensor is difficult. The meter is powered by a single 'AA' battery which will provide 40 hours of continuous operation. The Type 14 meter may also be supplied with a cylindrical sensor mounted on a flexible gooseneck, in place of the rotating jaw sensor.

Method of use

The meter is held with the sensor head in position across the belt. The belt is then tapped to induce the belt to vibrate at its natural frequency, which is dependent on the tension within the belt. The unit is suitable for measuring tension in all types of power transmission belts, ranging from toothed timing belts, poly-vee belts, and simple vee belts.

Model No

Range

Accuracy

Features

Temperature

Weight

TYPE 14

30.0 - 600Hz

+/- 1% (100 - 600Hz),

+/- 1 digit (30 - 100Hz)

Integral Sensor, separate remote sensor

-10 to 60 degree Celcius

500g

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Dimension indicator for Standard Type 3 sensor with rear cable entry

Type No. & Description

2-Small

- For small belts up to 10mm wide

The purpose of the sensor head is to detect the natural frequency of vibration of the belt. As the level of this acoustic signal is very small special patented techniques must be employed to recover this signal from the often high levels of ambient noise in a busy industrial environment. The twin transducers of the sensor head should be positioned in the centre of the belt for optimum performance. For belts up to 25mm wide the standard type 3 sensor is suitable.

For wider belts a sensor with longer jaws which enables the transducers to be positioned over the centre of the belt is more suitable.

It is important that the belt vibrates freely and does not come into contact with the sensor head. Therefore for belts with a heavy section the type 5 sensor is advised. On some applications it may not be possible to gain access to both sides of the belt. The type 10 cylindrical sensor is suitable in this case as it needs only to be pointed towards one face of the belt. However, its performance in rejecting high levels of background noise is poorer when compared with the standard dual transducer sensors, and therefore it may not be suitable for some measurement situations.

-A-B-C-D-E-FEntry

9 22 34 15 13 16 Top

3-Standard

- General purpose for all belts up to 25 mm wide. Particularly suitable for automotive belt drives.(Available until

stocks are exhausted)

3N-New Standard - A replacement for the Type 3

Sensor but with narrower body

9 40 38 20 23 20 Rear

10 36 40 18 22 16 Rear

5-Large - For wider synchronous and polyvee belts up to 60mm wide, where good access is available

12 52 50 25 34 20 Rear

6-Top entry

version of standard Type 3 sensor

7-Top Entry

- sensor for heavier section belts, giving good clearance between jaws

10

10

35

42

42

48

22

30

22

22

20

20

Top

Top

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8-Long Reach For wide belts up to 150mm wide.

May be used on all belts if positioned correctly

12 105 50 25 80 20 Rear

9-Medium Reach

- Low profile sensor for wider polyvee belts up to 75mm

10-Cylindrical - For all applications where only single sided access is possible. Can be used on belts of any width.

Also available in miniature form

10

18 dia

11 dia

11-Cylindrical Magnetic - For steel corded synchronous belts or tension measurement in steel cables

16 dia

50

130

60

80

38 18 35 20 Rear

12-Optical - High performance sensor for single sided access applications. Particulary suitable for miniature synchronous belts in printer mechanisms. Can only be used with meters having optical provision.

36 wide

100

Type 2 Type 3 Type 5

Type 6 Type 7 Type 8

Type 9 Type 10 Type 11

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Your Design Here!

We regularly make sensor heads to customer specifications. Typical turnaround from receipt of drawing or sketch is 2 weeks.

Type 12 Type XX

Custom sensor for DUCATI

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Examples for the conversion between Hz and Belt Tension in other Engineering Units

The relationship between Tension and Frequency is given by the following expression

T = 4 M L

2

F

2

T = Tension in Newtons

L = Span Length in metres

F = Frequency in Hz (as measured on the CLAVIS meter)

M = Mass per unit length of the belt, in kg/metre

For a 4 rib alternator belt as fitted to CE-14 diesel, the weight of the belt is 0.103kg. The length of the belt is 1.038m, therefore

M = 0.103/1.038

M = 0.1

For a 5 rib alternator belt as fitted to BE146, the weight of the belt is 0.096kg. The length of the belt is 0.868m, therefore

Example 1 - BE146

M = 0.096/0.868

M = 0.11

Setting frequency is 220Hz. What is the tension in lbs?

Top span length is 0.17m (where the frequency measurement was taken).

Mass per unit length is 0.11 for a 5 rib belt

T = 4 x 0.11 x (0.17 x 0.17) x (220 x 220)

T = 610N

To produce results in kg force divide by 9.81

T = 610/9.81 = 62 Kgf

To produce results in pound force, convert the kgf reading by multiplying by 2.2

T = (610/9.81) x 2.2 = 136.4 lbs

Example 2 - BE146

Setting tension is 140lbs. What should the frequency be?

140 lbs = 140/2.2kg = 63.6kg

63.6kg = 63.6 x 9.81N = 624N

T = 4 M L

2

F

2

We know that the span length (ie. the distance between the point of contact on one pulley, to the point of contact on the second pulley) is 0.17m, that the mass per unit length of a 5 rib belt is 0.11kg/m, and the setting tension is 624N. Therefore:

624 = 4 x 0.11 x (0.17 x 0.17) x F

2

F

2

F

2

= 624/ (4 x 0.11 x 0.17 x 0.17)

= 49,072

F = 221Hz

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GATES BELT DATA

Grams/metre length/millimetre width

PowerGrip timing belt

MXL (0.080”) - 1.3

XL (0.200”)

L (0.375”)

H (0.500”)

XH (0.875”)

XXH (1.25”)

-

-

-

-

-

2.4

3.2

3.9

11.3

14.9

Twin Power XL

Twin Power L

Twin Power H

PowerGrip HTD belts

3M (3mm)

5M

8M

14M

-

-

-

-

-

-

-

1.9

3.2

4.6

2.4

3.9

6.2

9.9

12.8

2.7

4.6

7.2

20M

Twin Power 3M

Twin Power 5M

Twin Power 8M

Twin Power 14M -

PowerGrip GT2 belts

8MGT (8mm)

14MGT (14mm)

-

-

PowerGrip GT belts

2MR (2mm)

3MR (3mm)

5MR (5mm)

-

-

-

-

-

-

-

12.3

5.8

9.7

1.4

2.8

4.1

Hi-Power belts

Z

A

B

C

D

E

Super HC belts

SPZ -

SPA

SPB

-

-

SPC

8V

-

-

Super HC MN belts

SPZ -

SPA

SPB

SPC

-

-

-

-

-

-

-

-

-

Hi-Power MN belts

Z non cogged - 56

Z cogged

A

B

C

-

-

-

-

51

99

156

240

70

126

211

373

721

1031

75

137

227

413

616

62

110

184

313.5

Poly Chain GT2v belts

8MGT (8mm)

14MGT (14mm)

-

-

4.7

7.9

Polyflex V-belts (grams/m/belt or strand)

3M Single - 4.2 / belt

5M Single - 11.2 / belt

7M Single

11M Single

5M-JB

7M-JB

11M-JB

-

-

27.5 / belt

56.1 / belt

- 13.1 / strand

- 34.3 / strand

- 74.0 / strand

Micro V-belts (grams/m/ribs)

H section - 5.9 / rib

J section

K section

L section

M section

-

-

-

-

8.4 / rib

20.0 / rib

30.9 / rib

124.1 / rib

Quad-Power II belts

XPZ

XPA

-

-

XPB

XPC

-

-

PowerBand belts

9J -

15J

SPB

SPC

8V

-

-

-

-

3VX-PB

6VX-PB

-

-

69

122

192

328.5

107

258

284

445

706

79

216

Note – For Powerband figure given is grams/metre/strand

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The CLAVIS Sonic Calibrator

In many applications where the Clavis belt tension gauging equipment is employed it is demanded by the Quality Assurance procedure that all the gauges used should have a calibration check performed at periodic intervals. Although all Clavis equipment may be returned to the manufacturer for the issue of a certificate of calibration, many Q.A. procedures require that a daily or weekly check be made.

The Clavis calibrator is a portable unit which drives a vibrating transducer at precise frequencies within the range of 30 to 600Hz. The transducer is inserted between the sensing head of the belt tension meter and a comparison between the m easured frequency and the driving frequency is made. The calibrator automatically steps through the frequency range in 50Hz intervals. All Clavis calibrators are issued with a certificate of calibration traceable to National standards.

The calibrator is equally suitable for both Clavis hand held belt tension meters and

Clavis production line belt tensioning equipment.

The calibrator and vibration transducer are supplied in a carrying case. The unit is powered by 4 standard AA size alkaline batteries.

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Specification

Model No

Range

Accuracy

Modes

Temperature

Dimensions

Weight

Sonic Calibrator

Spot frequency generation at;

35 - 75 - 125 - 175 - 225 - 275 -

325 - 375 - 425 - 525 - 575 Hz

> 1% error below 300Hz

> 0.2% error above 300Hz

Automatic advance, manual hold

Auto Power Off

-10 to 60 degrees Celcius

180 x 95 x 45mm

280g

For accurately translating the applied load in Newtons to a frequency in Hz the

CLAVIS belt calibration apparatus my be used. Loads of up to 800 Newtons may be applied to a belt in incremental stages and the frequency values recorded at each step.

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The CLAVIS handheld Belt Tension Sabre

The CLAVIS hand held Belt Tension Sabre is an optical tension meter with an integral electromechanical hammer. It is designed for use on production lines where the operator making the belt tension adjustment can measure tension easily and accurately using a one handed instrument. It is ideal for use on automotive production lines which have many engine variants with many belt layouts. Rather than use a number of jig plates with multiple sensor heads, the operator simply positions the 'Sabre' across each belt to be adjusted in turn. 4 tension readouts disposed at 90 degrees around the circumference enables the Sabre to be used at any orientation.

This is a robust tool designed and manufactured for continuous production use. It is machined from aluminium. The tool is powered through a linking cable to a control cabinet.

The measurement range is 30 - 400 Hz.

The sampling rate is typically 3 readings per second .

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CLAVIS optical technology is used to detect the belt vibration signal. This method is immune to all environmental conditions

The Sabre is held easily in one hand and is positioned so that the jaws are across the belt. The upper jaw is for guidance only and may be removed if required

With an update rate of 3 readings per second the operator can easily adjust the belt using a high speed power tools whilst observing the belt tension reading on the Sabre

The tension value may be read at any orientation as high Intensity LED numeric displays are located on all faces of the tool

A DVD showing this tool in use with a high volume Japanese automotive manufa cturer is available upon request.

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The display on the control cabinet shows the belt which is being tensioned and the target tension range.

Large LED red and green lamps show the state of the belt - either slack, tight or the correct tension.

The belt which is being tensioned can either be defined by a selection switch on the measurement

Sabre or by a PLC input to the CLAVIS control cabinet.

When the Sabre is not displaying a tension measurement reading, the display indicates the belt identification number. This number defines the correct tension range for which the green 'Tension

O.K' lamp illuminates.

The control cabinet has full PLC and Serial Data I/O interface capabilities for connection to any line side data collection and operation verification facility. The

Sabre is not suitable for fully closed loop operation as it is hand held by the operator which allows for the possibility of the sensor to be incorrectly positioned.

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Examples of Production Line Belt Tension Setting Systems

Engine Type:

Belt Type:

BMW 4 cylinder diesel

Polyvee for a/c drive

Adjuster: Pivoted plate, mechanically swung into position

CLAVIS features:

Lead screw system engages with pivoted tensioner plate to provide tension adjustement. The power tool which drives the lead screw is used in a closed loop mode, to provide fully automatic tension adjustment. The jig plate features an d optical sensor and electromechanical hammer. The power tool is used for other tightening operations at the same station.

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Engine Type:

Belt Type:

Adjuster:

FIAT 4 cylinder petrol

Polyvee for PAS drive

PAS pump mechanically swung into position


A pneumatic air cylinder pushes the PAS pulley away from the crankshaft pulley, therefore increasing belt tension. The air feed to the cylinder is controlled by the tension measurement system. Adjustment time is very rapid (less than 3 seconds). The tool is used for many variants of the same basic engine.

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On many automotive engine dress lines there is a requirement to tension a number of belts on a range of differing engines at a single station. In these situations it is not practicable to have a number of cable connected jig plates suspended above the track, due to the confined working area.

The Clavis 'Radio plate' tensioning equipment has been designed specifically for such situations, and is now in use in engine plants throughout the world.

In this system the operator places a small self contained battery powered jig plate onto the front of the engine. The belt is excited into vibration by a solenoid driven hammer, and the resulting frequency of vibration is transmitted back to the control

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_________________________________________________________________________________ cabinet by a UHF radio link. An electric nut-runner tool is placed onto the screw type belt tension adjuster, and adjustment is then performed automatically in a closed loop operation. Up to 3 sensors may be fitted to a single jig plate, so that sequential tension setting may be performed on Alternator, PAS, and Aircon belts, if all 3 are fitted. Cycle times for 3 belt adjustment are in the order of 22 seconds.

A different jig plate is required for different types of engines due to the differing belt layouts. On a typical engine dress line where the belt tensioning on a range of engines is being performed at one station, the jig plates are kept on a tray to one side of the track, just as any handtool would be treated. As the engine enters the station, the operator picks up the jig plate appropriate to the engine type, places it onto the engine, and then uses the common overhead electric power tool which is connected to the control cabinet. Alternatively the jig plates may be suspended from balancers.

Illlustrated above is a radio plate for a high mount PAS belt

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Engine Type:

Belt Type:

Adjuster:

FORD 4 cylinder diesel

Polyvee for PAS drive and A/C and Alternator

Jack screw idler pulleys


'Radio Plate' fitted with 2 sensor heads for differing combinations of

Alternator and A/C pump belt runs. Separate jig plate for highmount PAS pump. Closed loop, high precision adjustment. High throughput in excess of 80 engines per hour.

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Engine Type:

Belt Type:

Adjuster:

Ducati 2 Cylinder

2 x Timing Belt

Manually adjusted

Idler pulleys

CLAVIS Features

:

Jig plate featuring 2

Optical sensors with electromechanical hammers. Large display for the operator who makes the tension adjustment.

Purpose designed units for 2 valve,

3 valve and 4 valve engine variants.

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Engine Type:

Belt Type:

Land Rover 4 cylinder diesel

Timing Belt

Adjuster: Jack screw idler pulleys


Fully automatic timing belt adjustment station. CLAVIS unit engages with front face of engine. Both sides of the timing belt are adjusted. Unique detection system prevents idler pulley from tilting during the adjustment procedure.

Fast cycle time, less than 30 seconds.

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Engine Type:

Belt Type:

Adjuster:

Honda of America V6

PAS Belt

Jack screw on pivoted PAS pump


Lightweight jig plate locates easily on engine mount. Closed loop adjustment system. Optical sensor with electromechanical hammer.

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The CLAVIS G0 / NO GO System


Universal measurement system with easy to follow GO/NO GO indication

Up to 16 belt specifications including descsription may be entered from a PC

Belt type may be selected externally by a remote PLC or from buttons on the sensor head

A sensor head button may be used to signal the final set value after locking up for logging purposes

Full PLC and serial I/O available

Optical sensor head in robust aluminium housing with armoured connecting cable.

Suitable for continuous 24 hour production use.

Sensor requires access to one side of the belt only and is simply 'beamed' on.

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Sensor head may be used with a 10 metre cable. Remote inidcator lamp outputs are available if control cabinet cannot be positioned inview of the operator

Display may show description of belt to be measured, for example;

PAS - TOP SPAN 120-130HZ

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Clavis CLAVIS Type 4 Meter

GATES BELT DATA

The CLAVIS Sonic Calibrator

The CLAVIS handheld Belt Tension Sabre

Examples of Production Line Belt Tension Setting Systems

The CLAVIS G0 / NO GO System

Related manuals

SKF

PHL FM 10/400

LANDTEK

BTT-2880R5

Clavis

Type 7

Laser Tools

5846

HUTCHINSON

POLY V

Baumer

Idler pulley (Z 119.067)

Baumer

Idler pulley (Z 119.065)

LANDTEK

BTT-2880

Godiva

Prima PC1