Magtrol TM Series User manual

TM SERIES

IN-LINE TORQUE TRANSDUCERS

USER MANUAL

Via Paolo Uccello 4 - 20148 Milano

Tel +39 02 48 009 757 Fax +39 02 48 002 070 [email protected] www.dspmindustria.it

While every precaution has been exercised in the compilation of this document to ensure

the accuracy of its contents, MAGTROL assumes no responsibility for errors or omissions.

Additionally, no liability is assumed for any damages that may result from the use of the

information contained within this publication.

Copying or reproduction of all or any part of the contents of this manual without the ex-

press permission of Magtrol is strictly prohibited.

TRADEMARKS

National Instruments™, LabVIEW™ and NI-VISA™ are trademarks of

National Instruments Corporation.

Microsoft® and Windows® are registered trademarks of Microsoft Corporation.

2nd English Edition | Revision A | December 2020

TM series

SAFETY PRECAUTIONS

WARNING! IN ORDER TO MINIMIZE RISKS, IT IS OF UTMOST IMPORTANCE TO RESPECT THE

CURRENT SAFETY STANDARDS WHEN PLANNING, CONFIGURING AND OPERATING THE

TORQUE MEASUREMENT DRIVE TRAIN.

CAUTION: OPERATE THE TS SERIES INLINE TORQUE SENSOR WITH GREAT CAUTION! THE

SENSOR MAY BE IRREVERSIBLY DAMAGED IF IMPACTED MECHANICALLY FALL, CHEMI

CALLY ACIDS OR THERMALLY HOT AIR, VAPOR.

1. Make sure that all Magtrol electronic products are earth-grounded, to guarantee personal safety and

proper operation.

2. Check line voltage before operating electronic equipment.

Make sure that all rotating parts are equipped with appropriate safety guards.

Detailed information regarding the safety guards or protective systems can be found see

section2.5 - Protective systems.

3. Periodically check all connections and attachments.

4. Always wear protective glasses when working close to rotating elements.

5. Never wear a necktie or baggy clothes when standing close to rotating elements.

6. Never stand too close or bend over the rotating drive chain.

QUALIFIED PERSONNEL

Persons in charge of installing and operating the TM Series In-Line Torque Transducer must have read and

understood this user manual, paying extra close attention to all safety-related information.

The TM In-Line Torque Transducer is a high-precision product integrating the most recent measurement

techniques. The sensor can give rise to residual dangers if used and manipulated in a non-compliant way

by unqualiﬁed personnel.

This sensor must be handled by qualiﬁed personnel according to the technical requirements and the

above-mentioned safety instructions. This is also true when using torque sensor accessories.

WARNING

CAUTION

NOTICE

TM series

TABLE OF CONTENT

SAFETY PRECAUTIONS C

TABLE OF CONTENT V

PREFACE VII

1. INTRODUCTION 1

1.1 GENERAL INFORMATION 1

1.2 TM TRANSDUCER RANGE PRESENTATION 1

1.3 DATASHEET 2

2. INSTALLATION / CONFIGURATION 13

2.1 MOUNTING POSSIBILITIES 13

2.1.1 Suspended Installation 13

2.1.2 Supported Installation 14

2.1.3 TM/TMB in Vertical Installation 14

2.2 PARASITIC FORCES 15

2.2.1 Radial Forces (Bending) 15

2.2.2 Axial Forces (Thrust) 16

2.3 MEASURING SHAFT VIBRATIONS 17

2.3.1 Permitted Vibrations on Measuring Shaft 17

2.3.2 Torque Signal Conditioning Electronic Circuit 19

2.4 MOUNTING LIMITS 20

2.4.1 Dynamic Torque 20

2.4.2 Natural Frequency of Drive Train 20

2.4.3 Natural Measuring Shaft Torsional Frequency 22

2.4.4 Maximum Dynamic Amplitude 22

2.5 PROTECTIVE SYSTEMS 23

2.6 ELECTRONIC SIGNAL PROCESSING 24

2.6.1 MODEL3411 - Torque Display 24

2.6.2 DSP7000 - High-speed Programmable Dynamometer Controller 25

2.7 ELECTRICAL CONNECTIONS 26

2.7.1 Grounding 26

2.7.2 Connecting Cable 27

2.7.3 Cable Assembly ER107 (Pigtail Wires) 27

2.7.4 Cable Assembly ER113 (14-pin Connector) 27

2.7.5 Connection to Non-Magtrol Electronics 28

TM series TABLE OF CONTENT

3. OPERATING PRINCIPLES 31

3.1 TORQUE TRANSDUCER ARCHITECTURE 31

3.1.1 Dierential Transformer 31

3.2 SPEED CONDITIONING CHAIN 32

3.3 BUILTIN SELFTEST CIRCUIT B.I.T.E. 32

4. MAINTENANCE, REPAIR & CALIBRATION 33

4.1 MAINTENANCE 33

4.2 REPAIR 34

4.3 CALIBRATION 34

4.4 PACKAGING 34

SERVICES INFORMATION 35

RETURNING EQUIPMENT TO MAGTROL INC. UNITED STATES 35

RETURNING EQUIPMENT TO MAGTROL S.A. SWITZERLAND 36

REVISIONS TO THIS MANUAL 37

TM seriesTABLE OF CONTENT

PREFACE

PURPOSE OF THIS MANUAL

This manual contains all the information required for the setup, connection and general use of Magtrol’s

TM Series In-Line Torque Sensor. To achieve maximum capability and ensure proper use, please read this

manual in its entirety before operating the unit. Keep the manual in a safe place for quick reference when-

ever a question should arise.

WHO SHOULD USE THIS MANUAL

This is written for operators installing a torque transducer as part of a test system that meausres the torque

on transmission chains. The operator is assumed to have the necessary technical knowledge in electronics

and mechanical engineering enabling him to install the In-Line Torque Transducer without risk.

MANUAL ORGANIZATION

This section gives an overview of the structure of the manual and the information contained within it.

Some information has been deliberately repeated in dierent sections of the document to minimize cross-

referencing and to facilitate understanding through reiteration.

The structure of the manual is as follows:

Chapter 1: INTRODUCTION – Contains the technical data sheets for Magtrol’s TM In-Line Torque

Transducers, which describe the units and provide detailed technical characteristics.

Chapter 2: INSTALLATION / CONFIGURATION – Provides information needed for the setup of the TM

Transducers in a test system, and their integration with Magtrol electronic control units.

Chapter 3: OPERATING PRINCIPLES – Information pertaining to theory of operation including details

about the transducer’s architecture, speed conditioning chain and B.I.T.E. (Built-In Test

cirEquipement).

Chapter 4: MAINTENANCE, REPAIR & CALIBRATION – Provides information on maintenance, repair

and calibration procedures, should the need arise.

Chapter 5: SERVICES INFORMATION - Information, contacts and addresses relative for repair and/or

calibration.

SEMANTICS

In this manual, dierent terminologies may be used to speak about the «TM Series In-Line Torques Trans-

ducer». The primary purpose is to make this user manual useful and easy to read.

Below you will ﬁnd dierent terminology used such as: «In-Line Torque Sensor», «Torque Sensor», «Sensor»,

«In-Line Torque Transducer», «Transducer or «Torque Transducer» are synonyms; «TMXXX Series», «TM3XX

Series» or «TMSeries» are all abreviations for «TM Series In-Line Torque Transducer», etc.

The term «Series» stands for all the products of the series (e.g. TM3XX Series refers to TM301 - TM399).

VII

TM series PREFACE

CONVENTIONS USED IN THIS MANUAL

The following symbols and type styles may be used in this manual to highlight certain parts of the text:

Indicates information considered important but not hazard related.

This is intended to draw the operator’s attention to complementary information or advice

relating to the subject being treated. It introduces information enabling the correct and

optimal function of the product.

INDICATES A HAZARDOUS SITUATION THAT, IF NOT AVOIDED, COULD RESULT IN MINOR OR

MODERATE INJURY.

THIS IS ALSO USED TO DRAW THE OPERATOR’S ATTENTION TO INFORMATION, DIRECTIVES,

PROCEDURES, ETC. WHICH, IF IGNORED, MAY RESULT IN DAMAGE TO THE MATERIAL BEING

USED. THE ASSOCIATED TEXT DESCRIBES THE NECESSARY PRECAUTIONS TO TAKE AND

THE CONSEQUENCES THAT MAY ARISE IF THESE PRECAUTIONS ARE IGNORED.

INDICATES A HAZARDOUS SITUATION THAT, IF NOT AVOIDED, COULD RESULT IN DEATH

OR SERIOUS INJURY.

THIS INTRODUCES DIRECTIVES, PROCEDURES, PRECAUTIONARY MEASURES, ETC. WHICH

MUST BE EXECUTED OR FOLLOWED WITH THE UTMOST CARE AND ATTENTION, OTHER

WISE THE PERSONAL SAFETY OF THE OPERATOR OR THIRD PARTY MAY BE AT RISK. THE

READER MUST ABSOLUTELY TAKE NOTE OF THE ACCOMPANYING TEXT, AND ACT UPON

IT, BEFORE PROCEEDING FURTHER.

INDICATES A HAZARDOUS SITUATION THAT, IF NOT AVOIDED, WILL RESULT IN DEATH

OR SERIOUS INJURY. THE SIGNAL WORD «DANGER» IS TO BE LIMITED TO THE MOST EX-

TREME SITUATIONS.

THIS INTRODUCES DIRECTIVES, PROCEDURES, PRECAUTIONARY MEASURES, ETC.

WHICH MUST BE EXECUTED OR FOLLOWED WITH THE UTMOST CARE AND ATTENTION,

OTHERWISE THE PERSONAL SAFETY OF THE OPERATOR OR THIRD PARTY MAY BE AT

RISK. THE READER MUST ABSOLUTELY TAKE NOTE OF THE ACCOMPANYING TEXT, AND

ACT UPON IT, BEFORE PROCEEDING FURTHER.

The safety symbol may subsequently vary depending on the source of the hazard. Below are examples:

Various safety pictograms according to ISO 7010

NOTICE

CAUTION

WARNING

DANGER

VIII

TM seriesPREFACE

1. INTRODUCTION

1.1 GENERAL INFORMATION

The TM Series In-Line Torque Transducers represent a generation of high-precision torque sensors with

integrated electronic processing circuitry developed by Magtrol. The TM Series Transducers are available

in three versions: TMB, TM and TMHS; TMB for all standard applications, TM for high-precision applications

and TMHS for High-Speed applications.

The TM3XX Series includes transducers with the following torque ratings: 0.1N·m, 0.2N·m, 0.5 N·m, 1N·m,

2N·m, 5N·m, 10N·m, 20N·m, 50 N·m, 100N·m, 200N·m, 500N·m, 1000 N·m, 2000N·m, 5000N·m and

10000N·m.

The TM Series In-Line Transducers, together with Magtrol’s TS Series Torque Sensors and Magtrol’s TF Se-

ries Torque Flange Transducers, oer a wide range of torque measurement requirements for the most

demanding applications.

1.2 TM TRANSDUCER RANGE PRESENTATION

All TM Series In-Line Torque Transducers consist of a torque measuring shaft and built-in signal processing

electronics. These elements, along with two sealed bearings having lifelong lubrication, are all contained

in an aluminium housing which also supports the shaft.

The upper part of the unit contains the built-in electronics. This part is sealed according to the IP44 stan-

dard and oers protection against splashed water. A Souriau connector allows the torque transducer to

be connected to an external signal processing unit - such as the Magtrol MODEL3411 Torque Display - via

a special cable assembly.

Fig.1-1 TM314 & TM306 |In-Line Torque Transducers

TM Torque Transducers perform the following main functions:

1. Measurement of static and dynamic torque and detection of torque direction.

2. Measurement of the shaft’s rotational speed and detection of rotational direction.

3. Self-check.

The transducer’s integrated electronic circuitry ﬁlters the torque signal and its built-in self-test function

checks the operation of the measuring chain. Each transducer also has a built-in temperature compen-

sation circuit. This assures that the accuracy of the measured torque is maintained regardless of operating

temperature.

TM series INTRODUCTION

1.3 DATASHEET

www.magtrol.comDATASHEET

TM SERIES

SERIES

IN-LINE TORQUE TRANSDUCERS

FEATURES

▪Integrated torque and speed conditioning

▪Torque Range: from 0.1N·m to 10 kN·m

(0.07 lb·ft to 7375 lb·ft)

▪Accuracy: < 0.1 %

▪Overload Capacity: 200 %

▪Breaking Limit: > 400 %

▪High Speed Applications: up to 50 000 rpm

▪Non-Contact (no sliprings)

▪No Electronic Components in Rotation

▪High Electrical Noise Immunity

▪Single DC Power Supply: 20 VDC to 32 VDC

▪Immediate Speed Detection

▪Adjustable Torque Signal Frequency

Pass Band up to 5 kHz

▪Built-In Test Function (B.I.T.E.)

▪Stainless Steel Shaft

▪EMC Susceptibility Conforms to

European Standards

DESCRIPTION

Magtrol’s In-Line Torque Transducers provide extremely

accurate torque and speed measurement over a very broad

range. Each model has an integrated conditioning electronic

module providing a 0 VDC to ± 10 VDC torque output and an

open collector speed output. Magtrol Torque Transducers are

very reliable, providing high overload protection, excellent long

term stability and high noise immunity.

All transducer models employ our unique non-contact

differential transformer torque measuring technology. This

measuring technology offers many benefits, most notably that

no electronic components rotate during operation.

To provide customers with several price/performance options,

Magtrol offers three torque transducer models: basic model

(TMB Series), high accuracy (TM Series) and high speed with

high accuracy (TMHS).

Each transducer consists of a hardened stainless steel shaft

with smooth, splined or keyway shaft ends, an anodized

aluminium housing containing the guide bearings and an

electronic measurement conditioner.

The integrated electronic circuit, supplied by single DC

voltage, provides torque and speed signals without any

additional amplifier. The transducer is a stand-alone

measuring chain. Connections are made by means of a

6-pole male connector mounted on the housing. A removable

aluminium base (delivered as standard with TM and TMHS

models, and as an option for TMB transducers) allows fixed

mounting of the transducer.

Fig. 1: TM 312 & TM 308 In-Line Torque

Transducer with smooth shaft

www.magtrol.comDATASHEET

TM SERIES

OPERATING PRINCIPLES

The measuring system, based on the principle of a variable,

torque proportional transformer coupling, consists of two

concentric cylinders shrunk on the shaft on each side of the

shaft’s deformation zone, and two concentric coils attached

to the housing.

Both cylinders have a circularly disposed coinciding row of

slots and rotate with the shaft inside the coils. An alternating

current with the frequency of 20 kHz flows through the primary

coil. When no torque is applied, the slots on the two cylinders

fail to overlap. When torque is applied, the deformation zone

undergoes an angular deformation and the slots begin to

overlap.

Thus a torque-proportional voltage is on the secondary

coil. The conditioning electronic circuit incorporated in the

transducer converts the voltage to a nominal torque signal of

0VDC to ± 5VDC. A low-pass filter (Butterworth / 2nd order),

adjustable from 5 kHz to 1 Hz, allows tuning of the torque

signal frequency limitation.

An optical sensor reads the speed on a toothed pattern

machined directly on the measuring system. The electronic

conditioner outputs a frequency signal proportional to the shaft

rotational speed. An active circuit compensates the zero and

sensitivity temperature drifts within a tolerance of 0.1 % / 10 K.

APPLICATIONS

TM, TMB and TMHS Series Torque Transducers provide

dynamic torque and speed measurement of:

▪Propellers - aerospace, marine and helicopter

▪Windshield wipers, electrical windows, starters,

generators and brakes in automobile industry

▪Pumps - water and oil

▪Reduction gears and gearboxes

▪Clutches

▪Motorized valves

▪Drills, pneumatic tools and other machine tools

SYSTEM CONFIGURATION

ELECTRICAL CONFIGURATION

SUPPORTED & SUSPENDED

INSTALLATIONS

TheTMB Series is dedicated for use in a basic configuration

or for low speed applications. The TMB Series ranges from

TMB 304 (1 N·m) to TMB 313 (500 N·m). Due to dedicated

low speed usage,the TMB Series is delivered without base

mount however, a base is available as an option.

The TM Series ranges from TM 309 to TM 317 and can

also be installed without the base mount in a suspended

configuration. This configuration is only allowed for low

speed measurment. The benefit of this configuration is the

use of a single element coupling, creating a shorter drive train.

TM Series

Torque Transducer

MODEL 3411

Torque Display

Computer with

TORQUE Software

Fig. 2: TM connected with MODEL3411 Torque Display and a

computer with TORQUE Software

Power Supply

20 to 32 VDC / 100 mA (max.)

Test

Torque 0 to ±10 VDC (max.)

Speed

Fig. 3: TM's electrical input and output

Fig. 4: Supported installation

Mandatory for standard and high speed applications

Fig. 5: Suspended installation for low speed application only.

Use single element coupling to create a shorter drive train.

2agtrol.co

TM seriesINTRODUCTION

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