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Measuring wheel systems

Slip-free detection of linear movements
  • Spring arms and spring brackets,  contact forces up to 40 N
  • Operating travel 10 mm to 80 mm
  • Different measuring wheel surfaces
  • Incremental and absolute encoders
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Systems for speed measurement, position detection and length measurement

Measuring wheel systems from Kübler are the ideal solution for reliable speed measurement, position detection and length measurement in applications with linear movements. These are recorded rotationally via the measuring wheel with attached encoder directly on the surface of the material to be measured and converted into linear data. Integrated springs ensure the necessary contact force of the measuring wheel on the measuring surface for reliable measured value acquisition.

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Speed measurement

Position detection

Length measurement

Measuring wheel systems – Basics

Measuring wheel systems are used for the detection of linear movements

The linear movement (1) of a material to be measured is converted into a rotational movement (2) by a contacting measuring wheel (or pulley or pinion).
An attached incremental or absolute encoder (3) detects this rotation and converts it into speed, position and distance values.
The linear resolution of the measuring wheel system (mm) results from the ratio of the measuring wheel circumference and the rotary resolution of the encoder (ppr).

3-part structure of the measuring wheel systems – System components

Detection of the linear movement
by a measuring wheel (2), a pulley with toothed belt (1) or a pulley with toothed belt (3), which travels along with a material to be measured.

Data detection / data transfer
by a Kübler Sendix encoder (6), which is connected to the measuring wheel.

Spring-loaded encoder holder
Spring arms (4) and spring brackets (5) in different sizes and with different contact forces.
Integrated springs ensure slip-free measurement.

Calculation of the measuring steps

The linear resolution of the measuring wheel system (mm) results from the ratio of the measuring wheel circumference and the rotary resolution of the encoder (ppr).

  • Distance per pulse = measuring wheel circumference / number of pulses encoder = mm / ppr
  • Pulse per distance = number of pulses encoder / measuring wheel circumference = ppr / mm

„IIoT / Industry 4.0 ready“

This means that, in addition to the classic measuring task and transmission of measured values, rotary encoders must also offer further functionalities for networking products and collecting or transmitting additional information.
Which Industrie 4.0 functionalities an encoder needs to be "Industrie 4.0 ready" depends on the overall concept. The decisive factor here is the role assigned to the encoder. Either as an independent Industrie 4.0 object (asset) or as part of it. This determines whether the encoder must have its own management shell or is integrated into an existing management shell.
Learn more

The use of Industrial Ethernet communication in modern industry is continuously increasing. In the future, in line with the Industrie 4.0 idea, all areas of industrial production plants will be united in a single network on the Industrial Ethernet platform, from the field devices to the control level to the cloud. And this with real-time data exchange.
The corresponding communication capability of the sensors plays an essential role here.

Measuring wheel systems – individually configurable


Pre-assembled systems consisting of spring arm or spring bracket with matching measuring wheel and encoder
Product details
Compact-Line
MWE11

Smallest size

  • Contact force max. 10 N
  • Spring travel max. 10 mm
  • Measuring wheel circumference 100 mm
  • Encoder size 24 mm
  • Incremental
Product details
Compact-Line
MWE21

Adjustable preload

  • Contact force max. 20 N
  • Spring travel max.16 mm
  • Measuring wheel circumference 200 mm / 6"
  • Encoder size 36/40 mm
  • Incremental or absolute
Product details new
Compact-Line
MWE31

Internal springs

  • Contact force max. 15 N
  • Spring travel max. 10 mm
  • Measuring wheel circumference 200 mm
  • Encoder size 36/40 mm
  • Incremental or absolute
Product details new
Performance-Line
MWE41

Internal springs

  • Contact force max. 25 N
  • Spring travel max. 10 mm
  • Measuring wheel circumference 300 mm / 12"
  • Encoder size 58 mm
  • Incremental or absolute
Product details new
Performance-Line
MWE51

Manual operation

  • Contact force max. 32.5 N
  • Spring travel max. 20 mm
  • Measuring wheel circumference 300 mm / 12"
  • Encoder size 58 mm
  • Incremental or absolute
Product details new
Performance-Line
MWE52

Double measuring wheel system

  • Contact force max. 32.5 N
  • Spring travel max. 20 mm
  • Measuring wheel circumference 300 mm / 12"
  • Encoder size 58 mm
  • Incremental or absolute
Product details new
Performance-Line
MWE61

Maximum contact force

  • Contact force max. 40 N
  • Spring travel max. 80 mm
  • Measuring wheel circumference 300 mm / 12"
  • Encoder size 58 mm
  • Incremental or absolute
Product details new
Performance-Line
MWE62

Double measuring wheel system

  • Contact force max. 40 N
  • Spring travel max. 80 mm
  • Measuring wheel circumference 300 mm / 12"
  • Encoder size 58 mm
  • Incremental

System components – spring arms and spring brackets


Freely combinable with matching encoders and measuring wheels
Product details
Compact-Line
MWE20

Adjustable preload

  • Contact force max.20 N
  • Spring travel max.16 mm
  • Encoder size 36/40 mm
Product details new
Compact-Line
MWE30

Interior springs

  • Contact force max. 15 N
  • Spring travel max. 10 mm
  • Encoder size 36/40 mm
Product details new
Performance-Line
MWE40

Interior springs

  • Contact force max. 25 N
  • Spring travel max. 10 mm
  • Encoder size 58 mm
Product details new
Performance-Line
MWE50

Manual operation

  • Contact force max. 32.5 N
  • Spring travel max. 20 mm
  • Encoder size 58 mm
Product details
Performance-Line
MWE60

Maximum contact force

  • Contact force max. 40 N
  • Spring travel max. 80 mm
  • Encoder size 58 mm

System components - Encoders


Incremental or absolute – the right sensor technology for every application


For MWE2x, MWE3x
Incremental and absolute shaft encoders size 36/40 mm
For MWE4x, MWE5x, MWE6x
Incremental and absolute shaft encoders size 58 mm
Product details
For MWE52, MWE62
KIS50 incremental encoder with shaft on both sides

System components – Measuring wheels


Precise measurement on different materials
Product details
Measuring wheels
  • Suitable measuring wheel coating
  • Measuring wheel circumference:
    - 100 / 200 / 300 / 500 mm
    - 6" / 12"
Rack with pinion
  • 100 % slip-free
  • For encoder shaft 6 mm und 10 mm
  • Rack 1 m, stackable
Pulley with toothed belt
  • 100 % slip-free
  • Encoder size 58 mm
  • Toothed belt to 100 m

Solutions


System components can be individually combined
Rack with pinion - spring bracket MWE40 - preset counter Codix 924
Pulley with toothed belt - spring arm MWE60

Evaluation


Extension of the functionality of the measuring wheel systems with Kübler products for evaluation and control
Preset Counters
Preset counter
Convenient control of pulses, times and speeds. Electromechanical and electronic preset counters.
Multifunction Devices
Multifunction devices
Conveniently display and control pulses, times, positions and speeds. Electromechanical
and electronic counters.
Process Controllers
Process devices
Recording, controlling and monitoring of processes or different measured values.

Application examples

Speed measurement on a guide shaft

Requirement
• Reliable speed measurement
• Continuous contact force
• Easy to integrate
• Compact design

Kübler Solution – Measuring wheel system MWE21

(1) Spring arm:  MWE20
(2) Measuring wheel:  circumference 200 mm, plastic smooth
(3) Encoder:  Sendix KIS40, 1000 ppr
(4) Preset counter:  Codix 924 – visualization and control of speeds

Speed measurement on a conveyor belt

Requirement
• Direct measurement on the measured material (Not via motor encoder → Slippage in the system)
• Can be mounted from below against the conveyor belt (Overhead mounting)
• High contact force
• Large spring travel (Tolerance compensation from conveyor belt)
• Redundant double measuring wheel system (two support points for the measuring wheels)

Kübler Solution – Double measuring wheel system MWE62

(1) Spring arm:  MWE60
(2) Measuring wheel:  circumference 300 mm, Double O-ring
(3) Encoder:  Sendix KIS50, 1000 ppr
(4) Preset counter Codix 571T – color change of the display when reaching or falling below measured values

Length measurement - example wooden boards

Requirement
• Precise length measurement
• High contact forces
• Easy maintenance
• Robust overall system

Kübler Solution – Measuring wheel system MWE51
(1) Spring arm:  MWE50
(2) Measuring wheel:  circumference 300 mm, Kreuzrändel
(3) Encoder:  Sendix KIS50, 1000 ppr diamond knurl
(4) Preset counter:  Codix 560 – adjustment of the measuring length

Position measurement on gantry crane

Requirements
• 100 % slip-free measurement
• Exact positioning
• Absolute position feedback
• High contact force
• High shock resistance

Kübler Solution – Measuring wheel system MWE61
(1) Spring arm:  MWE60
(2) Measuring wheel:  Pulley with toothed belt
(3) Encoder:  Sendix F5868 PROFINET

Technology in detail – spring arms

Mounting encoder on spring arm or spring bracket

The encoder is attached to the spring arm or spring bracket with 3 screws.

With the MWE20 and MWE50 spring arms, the encoder can be mounted on both sides:
(1) Mounting left (factory setting)
(2) Mounting right

Outgoing direction cable and connector

For a variable outgoing direction of the cables or connectors the encoders can be mounted in 30° steps (MWE60 120°) to the spring arm or spring bracket.

Wide range of installation options

The measuring wheel systems with spring arm can be mounted on the application in a variety of ways.

(1) downwards
(2) to the side
(3) upwards (over head)

Manual adjustment of the preload

As a special highlight, the MWE50 spring arm has an adjustment wheel with scale.
The contact force of the system on the material to be measured can be manually set to a value between 5 N and 30 N.

(1) Pull off the setting wheel to the front
(2) Turn to the desired position for the preload (possible in both directions)
(3) Arrow on the dial points to the corresponding value on the scale

Adjusting the preload and spring travel limitation on the MWE60 spring arm

Starting from the mounting on the application (1), the desired preload (2) for the contact force is selected via an adjustment wheel.
Starting from the preload, the spring arm can rotate in the direction of the spring force (3).
Against the spring force (4), the spring arm rotates up to a stop (5) corresponding to approx. 40 N.
This spring travel limitation prevents overloading of the spring.

Technology in detail – measuring wheels


Different measuring wheel coatings for different surfaces of the material to be measured

Measuring wheel with diamond knurled coating

  • Measuring wheel coating made of aluminum with cross knurl running surface
  • Suitable for cardboard, wood , textiles, rubber or soft plastic
  • Available with circumference 100 / 200 / 300 / 500 mm and 6" / 12"
Simply combine the measuring wheels with the matching Sendix encoder and an encoder spring arm. For evaluation, you can draw on a wide range of counters and displays from our Codix portfolio.
To the measuring wheels

Measuring wheel with smooth plastic coating

  • Measuring wheels made of aluminum with smooth plastic coating (polyurethane)
  • Suitable for cardboard, paper, wood, textiles, plastic, painted surfaces, wire, greased metals, steel profiles, leather
  • Available circumference: 100 / 200 / 300 / 500 mm and 6" / 12"
Simply combine the measuring wheels with the matching Sendix encoder and an encoder spring arm. For evaluation, you can draw on a wide range of counters and displays from our Codix portfolio.
To the measuring wheels

Measuring wheels with O-ring or double O-ring

  • Measuring wheel coating made of aluminum with single or double O-ring
  • Suitable for cardboard, paper, wood, textiles, plastic, painted surfaces
  • Available with circumference 200 / 300 mm and 6" / 12"
Simply combine the measuring wheels with the matching Sendix encoder and an encoder spring arm. For evaluation, you can draw on a wide range of counters and displays from our Codix portfolio.
To the measuring wheels

Measuring wheel with tufted rubber

  • Measuring wheel coating made of aluminum with tufted rubber (polyurethane)
  • Suitable for cardboard, paper, wood, textiles, plastic,carpet, cable, fleece
  • Available with circumference 200 / 300 / 500 mm and 12"
Simply combine the measuring wheels with the matching Sendix encoder and an encoder spring arm. For evaluation, you can draw on a wide range of counters and displays from our Codix portfolio.
To the measuring wheels

Measuring wheel with corrugated plastic coating

  • Measuring wheel coating made of corrugated plastic (polyurethane)
  • Suitable for cardboard, paper, wood, textiles, plastic, metals ungreased, glass, flooring, painted surfaces.
  • Available with circumference 200 / 300 / 500 mm and 12"
Simply combine the measuring wheels with the matching Sendix encoder and an encoder spring arm. For evaluation, you can draw on a wide range of counters and displays from our Codix portfolio.
To the measuring wheels

DOWNLOADS


new
Brochures
   09.2022

Measuring wheel systems

Catalogs
   05.2022

Short form Catalog

new
Brochures
   10.2022

Industrie 4.0 / IIoT ready

new
Catalogs
   10.2022

New Products 2023