Kistler 9366CDsp Owner's manual

Instruction

Manual

Multicomponent

Force Link Set

Type 9366CD

9366CD_002-412e-04.23

Fz

Fx

Fy

Foreword

9366CD_002-412e-04.23 Page 1

Foreword

Information in this document is subject to change without

notice. Kistler reserves the right to change or improve its

products and make changes in the content without obligation

to notify any person or organization of such changes or

improvements.

provided herein, no part of this manual may be reproduced

for any purpose without the express prior written consent of

Kistler Group.

Kistler Group

Eulachstrasse 22

8408 Winterthur

Switzerland

Tel. +41 52 224 11 11

Fax +41 52 224 14 14

info@kistler.com

www.kistler.com

Multicomponent Force Link Set, Type 9366CD

Page 2 9366CD_002-412e-04.23

Content

1. Introduction............................................................................................................................... 4

2. Important Information ............................................................................................................... 5

2.1 For Your Safety ................................................................................................................................ 5

2.2 How to Treat the Instrument ............................................................................................................ 6

2.3 Tips for Using the Instruction Manual ............................................................................................... 6

2.4 What Happens After Modifications? ................................................................................................. 6

3. General Description of the Instrument .......................................................................................... 7

3.1 What Does a Multicomponent Force Plate Do? ................................................................................ 7

3.2 Functional Principle ........................................................................................................................... 8

3.3 Design of the Multicomponent Kit .................................................................................................... 9

4. Assembly, Installation and Putting Into Operation ........................................................................ 10

4.1 Important Remarks.......................................................................................................................... 10

4.2 Design Variants of Force Plate......................................................................................................... 11

4.2.1 Size of Top Plate ................................................................................................................ 12

4.2.2 Suggested Cover Plate Materials....................................................................................... 13

4.2.3 Thickness of Top Plate ....................................................................................................... 13

4.2.4 Weight of Top Plate........................................................................................................... 13

4.2.5 Measuring Ranges ............................................................................................................. 14

4.2.6 Natural Frequency ............................................................................................................. 15

4.2.7 Cover Plate Mounting Dimensions .................................................................................... 16

4.3 Mounting Set on Cover Plate .......................................................................................................... 20

4.4 Installing the Force Plate ................................................................................................................. 24

4.5 Basic Circuity and Cabling of the Measuring System....................................................................... 25

4.5.1 Measuring System ............................................................................................................. 25

4.6 Triaxial Force Measurement............................................................................................................ 26

4.7 6-Component Force Measurement ................................................................................................. 28

5. Operation ................................................................................................................................ 29

5.1 Range selection ............................................................................................................................... 29

5.2 Measuring Small Force Changes...................................................................................................... 29

5.3 Useful Frequency Range .................................................................................................................. 31

5.4 Temperature influences .................................................................................................................. 33

5.5 Polarity of the Measuring Signal ..................................................................................................... 33

6. Maintenance ............................................................................................................................ 34

6.1 Recalibration of Sensor ................................................................................................................... 34

7. Troubleshooting ....................................................................................................................... 35

7.1 Diagnosis and Rectification of Faults ............................................................................................... 35

7.2 Defective Multicomponent Kit ........................................................................................................ 36

8. Technical Data .......................................................................................................................... 37

Content

9366CD_002-412e-04.23 Page 3

9. Annex ...................................................................................................................................... 38

9.1 Glossary ........................................................................................................................................... 38

9.2 Measurement Uncertainty .............................................................................................................. 41

9.3 Linearity .......................................................................................................................................... 42

9.4 Frequency Range ............................................................................................................................. 44

9.5 Influence of Temperature ............................................................................................................... 45

Total pages: 46

Multicomponent Force Link Set, Type 9366CD

Page 4 9366CD_002-412e-04.23

1. Introduction

Please take the time to thoroughly read this instruction

manual. It will help you with the installation, maintenance,

and use of this product.

To the extent permitted by law Kistler does not accept any

liability if this instruction manual is not followed or

products other than those listed under Accessories are

used.

Kistler offers a wide range of products for use in measuring

technology:

 Piezoelectric sensors for measuring force, torque, strain,

pressure, acceleration, shock, vibration and acoustic-

emission

 Strain gage sensor systems for measuring force and

moment

 Piezoresistive pressure sensors and transmitters

 Signal conditioners, indicators and calibrators

 Electronic control and monitoring systems as well as

software for specific measurement applications

 Data transmission modules (telemetry)

Kistler also develops and produces measuring solutions for

the application fields engines, vehicles, manufacturing,

plastics and biomechanics sectors.

Our product and application brochures will provide you

with an overview of our product range. Detailed data

sheets are available for almost all products.

If you need additional help beyond what can be found

either on-line or in this manual, please contact Kistler's

extensive support organization.

Important Information

9366CD_002-412e-04.23 Page 5

2. Important Information

Please keep to the following rules without fail. This will

ensure your personal safety when working, and assure

long, trouble-free performance by the instrument.

2.1 For Your Safety

 This instrument has been tested thoroughly and it left

the works in a perfectly safe condition. To maintain this

condition and assure safe operation, the user must

observe the directives and warnings contained in these

instructions.

 The multicomponent kit allows to design your own

force plate. General information in this Instruction

Manual refer to the mounted force plate.

 The force plate must be installed, operated and

maintained only by persons who are familiar with it and

adequately qualified for their particular tasks.

 When it must be assumed that safe operation is no

longer possible, the instrument must be taken out of

operation and secured against unintentional use.

It must be assumed that safe operation is no longer

possible if:

 the instrument is visibly damaged,

 it no longer functions,

 it has been in lengthy storage under adverse

conditions,

 it has received rough treatment during transport.

Fix the force plate on the mounting surface according

to the instructions. See section 4.6 "Assembling the

force plate", for details.

Fix all parts mounted on the top plate of the force plate

according to the forces expected!

Multicomponent Force Link Set, Type 9366CD

Page 6 9366CD_002-412e-04.23

2.2 How to Treat the Instrument

 The force plate may be used only under specified

environmental and operating conditions.

 The insulation resistance is crucially important with

piezoelectric measurements. It must be around 1014 Ω (but

at least 1013 Ω).

 To obtain this resistance, all plug and socket connections

must be kept meticulously clean and dry.

 The insulation resistance can be measured with the

insulation tester Type 5493.

 Protect the signal output against dirt and do not touch it

with your fingers. When the connection is not being used,

cover it with the cap provided.

 The connecting cable (from the force plate to the charge

amplifier) is highly insulating. Use the proper cable only.

 Do not remove the connecting cable from the force plate.

 When performing long-time measurements, make sure

that the temperature of the force plate remains as

constant as possible.

2.3 Tips for Using the Instruction Manual

We recommend reading the entire Instruction Manual as a

matter of principle. If you're in a hurry, however, and you've

already gathered experience with Kistler force plates you can

confine your reading to the information that you really need.

We have arranged these instructions so that you can find the

information you need without difficulty.

Please keep this Instruction Manual in a safe place where they

can be consulted any time.

If the instructions get lost, just turn to your Kistler distributor

and they will be replaced without delay.

2.4 What Happens After Modifications?

Modifications to instruments result in alterations of the

Instruction Manual as a rule. In such cases, enquire at your

Kistler distributor about the possibilities of updating your

documentation.

All information and directives in this Instruction Manual may

be modified at any time without notification.

General Description of the Instrument

9366CD_002-412e-04.23 Page 7

3. General Description of the Instrument

3.1 What Does a Multicomponent Force Plate Do?

The multicomponent force plate provides dynamic and quasi-

static measurement of the 3 orthogonal components of a

force (Fx, Fy, Fz) acting from any direction onto the top plate.

With the aid of optional evaluation devices the 3 moments Mx,

My and Mz can be measured as well.

The force plate has high rigidity and hence high natural

frequency. The high resolution enables very small dynamic

changes to be measured in large forces.

The force plate measures the active force regardless of its

application point. Both the average value of the force and the

dynamic force increase may be measured. The usable

frequency range depends mainly on the resonance frequency

of the entire measuring rig (top plate, foundation)

Fig. 1: Multicomponent force plate as viewed from below

Typical applications for the multicomponent force plate are

 Cutting force measurements in milling and grinding

 Measurements on wind tunnel models.

 Ergonomic measurements.

 Measurements on stamping machines and presses.

 Measurements of impact forces.

 Measurements of wheel forces.

 Measurements of supporting forces.

Multicomponent Force Link Set, Type 9366CD

Page 8 9366CD_002-412e-04.23

3.2 Functional Principle

The force to be measured is introduced via a top plate and

distributed among four triaxial force sensors arranged in a

force measuring element.

Each of the sensors has three pairs of quartz plates, one

sensitive to pressure in the z direction and the other two to

shear in the x and y directions respectively. The measurement

is virtually without displacement.

In these four force sensors the force introduced is broken

down into three components.

Fig. 2: Triaxial Force Sensor

Depending on the direction of the force, positive or negative

charges occur at the connections. Negative charges give

positive voltages at the output of the charge amplifier, and

vice versa.

General Description of the Instrument

9366CD_002-412e-04.23 Page 9

3.3 Design of the Multicomponent Kit

The multi-component force link kit consists of four force

measuring elements and a summing box with integrated

cables. Each force link contains a preloaded triaxial force

sensor.

The 3-core cables of the summing box are routed in protective

hoses and the screw connections to the sensor are marked

with the corresponding position of the force measuring

platform.

The four sensors are installed ground-isolated. This largely

eliminates ground loop problems.

For complete ground isolation the four connecting cables

and the summing box have to be mounted with electrical

insulation on the cover plate.

The multicomponent kit is rustproof and protected against

ingress of splash water and coolant.

Fig. 3: Dimensions of the multicomponent force link Set and

the summing box

Together with the connecting cable (Type 1687B...

or 1677A…) the multicomponent kit meets the requirements

of degree of protection IP 67.

Fischer flange 9-pole, neg.

Cable length: l

Summing box

93x93x33 mm

Multicomponent Force Link Set, Type 9366CD

Page 10 9366CD_002-412e-04.23

4. Assembly, Installation and Putting Into Operation

4.1 Important Remarks

The multicomponent force plate is a precision instrument, but

its inherent accuracy can be exploited and retained only if it is

treated with care. The following rules should therefore be

noted:

Never drop the force plate or expose it to heavy impacts!

The maximum force of a shock of this kind could exceed the

measuring range of the instrument and cause permanent

deformations.

Never use a hammer to position the workpieces, as such

blows might also cause deformation!

On the following pages you will find directions:

 for four different design variants of force plates;

 to build your own top plate;

 to mount the multicomponent kit on the top plate;

 to install the force plate on the machine table;

 for the base circuitry and cabling of the measuring

equipment.

Assembly, Installation and Putting Into Operation

9366CD_002-412e-04.23 Page 11

4.2 Design Variants of Force Plate

Fig. 4: Design variants of force plates

Variant 1: Main solution for minimum overall height

Variants 2, 3 and 4: Additional solutions

Variant 1

Standard model

Variant 2

Variant 3

Variant 4

Top plate

Variant 2

Multicomponent Force Link Set, Type 9366CD

Page 12 9366CD_002-412e-04.23

4.2.1 Size of Top Plate

The cover plate must be between 300x300 mm (minimum)

and 900x900 mm (maximum) in size. Steel versions chosen

must not exceed 600x600 mm.

A cable length of 0.5m is long enough for cover plates up to

750x750 mm in size. For larger cover plates the length of the

cable must be specified accordingly

Fig. 5: Dimensions of cover plate and layout of force links

(plan view)

Assembly, Installation and Putting Into Operation

9366CD_002-412e-04.23 Page 13

4.2.2 Suggested Cover Plate Materials

Steel

DIN 1.4057* X17CrNi162

DIN 1.4021* X20Cr13

DIN 1.2316* X36CrMo7

DIN 1.1191 Ck45

* rust-resistant

Aluminum

DIN 3.4345 Al Zn Mg Cu0.5

EN AW-7022-T651

4.2.3 Thickness of Top Plate

The thickness depends on the size, load and material of the

top plate. It must not be less that the recommended values.

Fig. 6: Thickness of cover plate as a function of its length

4.2.4 Weight of Top Plate

The weight of the top plate can be calculated from the

dimensions as follows:

Weight of steel top plate

L x B x H x 7,8 x 10-6 (kg)

Weight of aluminum top plate

L x B x H x 2,8 x 10-6 (kg)

Multicomponent Force Link Set, Type 9366CD

Page 14 9366CD_002-412e-04.23

4.2.5 Measuring Ranges

The maximum allowed measuring range of the force plate

depends on the dimensions and material of the top plate and

on the point of force application. The maximum measuring

ranges (see Fig. 7) applied for a point of force application

within and no more than 100 mm above the surface of the top

plate.

Fig. 7: Measuring ranges as a function of cover plate

length

Assembly, Installation and Putting Into Operation

9366CD_002-412e-04.23 Page 15

4.2.6 Natural Frequency

A carefully mounted force plate of the recommended

thickness achieves the following approximate natural

frequencies.

Fig. 8: Natural frequency as a function of cover plate

length

Multicomponent Force Link Set, Type 9366CD

Page 16 9366CD_002-412e-04.23

4.2.7 Cover Plate Mounting Dimensions

The dimensions for mounting the force links on the cover

plate for the four variants listed in Section 4.2 are given below.

Variant 1

Fig. 9: Mounting dimensions of variant 1 (standard

model)

The force link can be aligned using mounting socket/pin or

alignment surfaces.

Top plate

Assembly, Installation and Putting Into Operation

9366CD_002-412e-04.23 Page 17

Variant 2

Fig. 10: Mounting dimensions of variant 2

The force link can only be aligned using the alignment

surfaces.

Top plate

Intermediate ring

Multicomponent Force Link Set, Type 9366CD

Page 18 9366CD_002-412e-04.23

Variant 3

Fig. 11: Mounting dimensions of variant 3

The force link can only be aligned using the alignment

surfaces.

Intermediate ring

Top plate

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Kistler 9366CDsp Owner's manual

Kistler 9366CDsp Owner's manual

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