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The collapse of magnetic field due to the interruption by a ferrous gear tooth provides an analog signal output (sine wave) that does not require an outside power source. Variable reluctance sensor or Mag-pickup is suitable for speed sensing with a range from 30 to 1000 inches per second with a target gear from one tooth per revolution to 32 pitch gear.
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Application
Incremental rotation sensors are used wherever displacement, positions or speeds have to be measured accurately. They are therefore important interfaces between the mechanical and electronic parts of a machine.
Mechanically robust, electrically reliable and resistant to extreme ambient conditions; these are the outstanding properties offered by this sensor.
Typical applications include:
Machine tools
Wood and plastic machining
Textile machines
Lifts
Door systems
Paper machines
Drive equipment
Assembly and handling equipment
Packaging machines
Scales
Test machines
Conveying equipment
Doors and gates
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Harowe Resolvers™ - are the first choice for rugged, noise resistant housed and brushless resolvers trusted for heavy duty construction and non-stop performance in tough conditions for over 50 years. Our Harowe brand resolvers are the first choice for feedback in adverse operating conditions involving extreme temperature, high shock or vibration and dirty environments. Rugged, noise resistant and brushless, these resolvers are trusted for non-stop performance in tough conditions. Harowe became a division of Danaher Industrial Controls Group in 2004.
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Absolute encoders are devices used to measure lengths or angles and are used as distance gauges in machine tools, in handling and automation technology and on testing units.
Absolute encoders
These output positional information in the form of a numerical value (code). This numerical value is unique across the entire resolution range of the absolute encoder. For this reason no initial reference run is required, as is the case with incremental encoders.
With rotary encoders, a distinction is made between single-turn encoders, which provide a resolution on just a single rotation and then revert to 0, and multi-turn encoders that provide a resolution over several rotations. A further distinction is made between optical and magnetic encoders.
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Absolute encoders have a unique value (voltage, binary count, etc) for each mechanical position. When an absolute encoder is turned on, the position of an absolute encoder is known.
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Model 600 Series (Robust)
Field bus interfaces based on Ethernet, PROFIBUS or CAN are examples of the communication protocols often used in automation. These interfaces are available on the Model 600 Series absolute coded singleturn or multiturn encoders. A robust mechanical design in shaft or hollow shaft design ensures that installation and start-up of these models are always reduced to a minimum. Serial point-to-point interfaces such as EnDat or the popular SSI are examples of other communication interfaces often used for position feedback from absolute coded encoders.
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The new TM 50 and TS 50 series of rotary encoders features an electromagnetic contactless sensing system with Hall elements. The maximum resolution is 13 bits per 360°, the measuring range can be programmed between of 1 to 32768 revolutions. Among many applications in machinery and engineering equipment it can be used for measurement of long displacements in connection with toothed belts and racks, cable type converters, friction wheels and spindle drivers.
The housing is either in aluminium or stainless steel for use under water and within aggressive ambiance. Besides CANopen, SSI and PROFIBUS interfaces analogue voltage and current signals as well as additional incremental outputs can be made available. The electronic circuit is completely potted and withstands high shock and vibration stress.
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Rotation sensor type DDR
Two solutions :
Pulses output: DDR 12 (+ Electronic control ULSA)
Inductive relay output: DDR 30
Main Advantages :
This robust and compact device is fixed to the tailshaft of the rotating machine
It delivers pulses by the threshold monitor by means of an inductive
When the predetermined threshold has been reached, a change-over relay is released and an indicator circuit is established.
A chain prevents from any rotation of the body
The circuit can be linked up to auxiliary electrical equipment and visual or sound indicator systems
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Ex and IP Encoders
Explosion protection is a sub-field of technology that deals with protecting against the occurrence of explosions and their effects. It is part of the field of safety technology and serves to prevent damage to people and property caused by technical products, systems and devices. Explosion protection comprises technical solutions and statutory provisions. Our EX encoders have been developed for this purpose and satisfy these requirements. Corresponding test certificates have been issued by external testing institutes.
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The prestigious Belgian institute ISSeP of Liege provided Elcis with the latest certifications ATEX II 2 G D Ex d II C T6 - Ex tD A21 IP 6x T85°C and Ex d II C T5 - Ex tD A21 IP 6x T100°C, according to CENELEC rules and CESI provided the Product Quality Assurance Notification.
This absolute encoder series is suitable for use on working environments with explosive atmosphere (except for mines with grisù) due to gas (G) and/or dust (D).
The available models are extremely sturdy; they are made in turned from rod metal with precision bearings and stainless steel shaft.
On request these encoders can be completely stainless steel.
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- Cover: Aluminium (or stainless steel)
- Body: Aluminium (or stainless steel)
- Solid shaft: Stainless steel
- Bearings: 2, ballraces
- Weight: Approx.1700gr.(EXHA 4000gr)
- Protection: IP65
- Rpm: 6000 Max
- Torque: 5Ncm
- Inertia: 100gcm²
- Shaft loading: Axial 200N - Radial 200N
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The most complete range of the ATEX encoders market has been developped by BEI IDEACOD: explosion proof and intrinsically safe encoders.
PULSATEX™
Delivering pulses, PULSATEX™ encoders are available with a 12mm solid shaft or a 30mm hollow through shaft. Certified EEx d IIC T6, they have been developped for category 2 applications: zone 1 (gas) and 21 (dust).
VELATEX™
Offering a speed in the form of impulses and/or an analogical tension, encoders VELATEX are labeled EEx D IIC T6. Ideal for an operation of category 2 zone 1 gas and dust.
POSATEX™
Delivering an absolute position, POSATEX™ single or multi turn encoders are certified EEx d IIC T6, they have been developped for category 2 applications: zone 1 (gas) and 21 (dust)
INTRATEX™
After the success of the marketing of its flame-proof encoders, BEI IDEACOD launches INTRATEX: range of incrémental encoders with intrinsic safety.
These encoders are especially designed for explosive atmosphere gas or dust. Their grounds of application are the chemical industry (painting, solvent, perfumes, rubber), the textile, the food one, wood, storage or petrochemistry....
They are labeled Ex II 1G/D, Eex ia IIC/b T4.
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IGP Series
Using this potentiometer a maximum angular rotation of 3800° can be converted into a voltage proportional to the angle of rotation, through the medium of a conductive-plastic potentiometer.
This special "heavy-duty" version is designed to measure angular or linear displacement under the most difficult of enviromentat conditions. Simply yet robustly built, these units are suitable for use in all manner of industrial applications and engineering industry.
The cast housing is watertight. The single stage gearing is exceptionally backlash-free. Heavy-duty bearings allow for high axial loading on the shaft; gearwheels or even chain drives may be used directly drive the shaft.
Sealing is achieved through the use of a stepped bush whilst electrical connections are made via plug and socket mounted on the side of the unit.
Special features
- reduction gearing 3:1, 5:1, 10:1
- good linearity 0.1 % (standard)
- long life typically 100 x 106 movements
- mechanical rotation
- robust construction with 10 mm shaft
- Protection class IP 65
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Geard potentiometers are well known for their robust analog technology. Measured values are recorded absolutely, which means there is no need for referencing.
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Model 800 Series (Heavy duty)
When the most robust, maintenance-free and cost-effective pulse encoder solution is sought after, the encoders in the Model 800 Series are the first choice of the majority of designers. The optional ADS™ (Advanced Diagnostic System) is a built-in system used for condition-based or preventative maintenance, guaranteeing the reliability of the application. Demanding environments and electrically or mechanically stressful installations are circumstances the encoders in the Model 800 Series are often exposed to and for which they are well-protected. Accessories and ready-made design solutions meant to guarantee operation and increase service life which reduce the total cost of the application are also offered as options for the encoder series.
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Rotary Shaft Encoders are ideal for use on any rotating shaft to provide a digital output signal to tachometers, counters, speed switches, motor controls, or anything requiring a pulse input. Flexible shaft couplings are available as an option to compensate for shaft misalignment, and are recommended for most applications.
Electro-Sensors Rotary Shaft Encoders convert shaft rotation into square wave output pulses. They provide an accurate means of transmitting actual speed information for detecting rate, position, or direction of rotation. The shaft encoder produces an output signal by rotating a disc with clear and opaque segments between a light emitting diode and a photo-transistor sensor. The output signal from the encoder is then converted into a square wave signal by an internal squaring circuit. The number of output pulses per shaft revolution is determined by the number of clear and opaque segments on the disc. Quadrature (bi-directional) models have a second LED and sensor positioned 90-degrees apart to produce two square wave signals.
Features:
- Ideal for Use on Slow Speed Applications
- Provides Precise Pulse Train for use with Tachometers, Counters, Speed Switches and Speed to Analog Converters
- Multiple Mounting Configuration for easy Installation
- Wide Variety of Pulse per Revolution Counts are Available
- Please Specify PULSES PER REVOLUTION (PPR) When Ordering
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The new T160 series of electromagnetic encoders have been developed for position feedback and integration into servo control devices and valves of power stations. They feature an electromagnetic sensor system which supplies an analogue signal of 0(4) to 20 mA or 10 VDC for any rotary movement within the range of 45 to 360 degrees. The housing and the mounting flange are milled out of one piece of aluminium or stainless steel. The shaft runs within two sturdy bearings. As an alternative serial SSI, CANopen or PROFIBUS-DP outputs can be made available. The unit complies to protection grade IP68 and can be used under water.
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The precision photoelectric angle encoder is used for very precise position measurement of rotary tables, dividers, comparators, antennas and other high precision equipment. It gives information about the value and direction of the motion components. The encoder is used in automatic control, on-line gauging, in process monitoring systems, etc.
The encoder has a rigid stainless steal construction and an internal coupling. Hollow shaft of encoder is connected with an object shaft by screws.
Model: A170
Type: High precision photoelectric angle encoder;
Diameter, mm: 170;
Number of pulses per revolution: 18000 to 900000;
Output signals/Power supply: ~11 µApp; ~1 Vpp; TTL/+5V;
Accuracy, arc. sec.: ±2.5.
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The Series 9x25 is a family of optical incremental encoders designed for industrial-grade
applications that require high resolution and high accuracy. All 9x25s share these features:
- LED illumination for long life (>100,000 hours)
- Differential photo-detectors for signal stability
- Single-board, surface-mount electronics for reliability
- RS-422 differential line driver output for noise immunity
- Zero index signal
- SealedABEC7 bearings for contamination resistance.
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< Functional description of incremental encoders
< Mechanical connections for incremental encoders
< Connectivity for incremental encoders
< Different ways of mounting the encoder
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3.5" dia x 2.4" long body; fits shafts up
to 1.20" dia
- Internal bellows-type precision flexible
shaft coupling
- Up to 90,000 cycles/rev (A quad B) at
500 kHz with internal electronics
- Up to 225,000 cycles/rev (A quad B) at
1 MHz with external electronics
- Buffered sinusoid (11,250 cycles/rev
Max), TTL, open collector or RS-422
output
- Three accuracy grades
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Pulses: 1.000, 1.024, 2.048, 2.500, 4.096
Housing: Ø 100 mm, L 37 mm
Continiuous hollow shaft: Ø 25-42 mm
Max. RPM: 3.500 U/min
Loading on shaft end: max 200 N radial, 100 N axial
Output channels: ABN, ABN inv.
Pulse frequency: 200 kHz
Power supply: 4.75 - 5.5 VDC, 10 - 30 VDC
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Incremental Encoder HS15
Performance Benefits:
With high-performance, high-resolution digital feedback in an extremely small package, the new DataTorque HS15 combines the resolution and performance common with much larger encoder packages with the stability of a bearing encoder design.
The HS15 provides a bearing design that simplifies encoder attachment, resulting in a longer service life with less downtime (from feedback device failure). It delivers high noise immunity. In addition, the DataTorque HS15 is cost competitive with modular encoders.
Design Features:
The DataTorque HS15 is miniature in size, only 1.5 inches (38 mm) in diameter and low profile, only 0.87 inches (22 mm) in assemble height, yet it provides resolutions up to 5,000 lines with or without commutation. Output options are single-ended or differential line driver.
The DataTorque HS15 has low supply current requirements. The optional 5 to 26 VDC can help reduce inventory. It is constructed of a conductive carbon fiber composite that provides the EMI shielding of an all-metal housing and the performance of a lightweight robust assembly.
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The encoder is used to measure angular position of the key components of machines, industrial robots, comparators, rotary tables, servo drives, dividing equipment and to establish an informational link with DCC, NC or Digital Readout units. The encoder has integrated stator coupling so it can be fixed directly on the object shaft. Adapter (delivered on option) can be used for mounting convenience. The encoder is used in automatic control, adjusting and monitoring systems.
Model A58H
Design: With integral coupling and hollow shaft;
Diameter, mm: 50;
Number of pulses per revolution: 100 to 108000;
Output signals/ power supply: ~11 µApp; ~1 Vpp; TTL/+5V;
Accuracy, arc. sec: ±0,1T; ±0,05T; ±12" according to special order.
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PRECILEC optical incremental encoders are designed with the same reliability than the RADIO-ENERGIE tacho generator. They measure with the highest accuracy the angular speed and position of rotating shafts in industrial environment : machine tools, specific machineries, robots, motor drives, lifts, handling, cranes, speed controllers, packing machines and various industries.
Main Characteristics of our encoder diameter 58, RCI 58 HS
PRECILEC encoders use a differential optical and ratio metric principle.
Their universal complementary push-pull output interface and their large supply voltage range make them very easy to connect to most of electronic control units.
Shaft type : 12, 14, 15mm and ½inch, stainless steel hollow through shaft.
Housing diameter : 58mm.
Pulses per turn : from 1 to 5400.
Fixation spring plate – Termination Radial cable, M23 and MS310 receptacle.
Operating temperature range (encoder body) : - 25° C / 85° C.
Electrical Characteristics :
Supply voltage : 4,5 to 30V DC with reverse polarity protection.
Output signals Universal complementary push pull, short circuit protected (7272) RS422 compatible with 5V supply voltage.
Mechanical Characteristics :
Max speed : 6000rpm.
Protection : IP64 at shaft end, IP 65 at housing (IEC60529).
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The incremental coder is planned for demanding applications relating to the detection of angles, direction of rotation and speeds. It delivers a signal whose values are in relative connection with the position of reference zero.
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G080
Contact load <30 W (100 VA)
<230 V (approx. 2 A)
Operating mode Impulse emission in both rotating directions
Output frequency <0.025 kHz
Output signals Contact
Resolution (steps/turn) 0.2...15
Supply voltage range 12...220 V
Other products available:
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ELCIS range of incremental encoders is composed of more than 130 transducers with Ø 19 ÷ Ø 250 mm, with resolutions from 1 to 900000 pulses/revolution according to the model chosen (the Customer can multiply the resolution by two or by four).
There are several available output electronics and power supplies can be choosen from 5VDC to 30VDC.
Standard operating temperature is 0°C ÷ +70°C or -40°C ÷ +100°C upon request. Max frequency is available from 100kHz to 1MHz according to the model.
Elcis philosophy towards his customers is not limited to supply a reliable standard encoder, but also to design, at no extra cost, customized units based on their specific requirements.
Thanks to the extremely wide model range, proved quality and sturdiness, Elcis encoders are thus world-wide used.
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Incremental encoder is the term given to sensors for recording changes in position (linear or rotating) that can measure both the distance and direction of travel.
They are also known as optical encoders.
Unlike measuring systems that work continuously, incremental encoders have a solid measure with a repeating periodic counting track. The measurement is based on a directional reference and a count.
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The very resistant but compact design combines versatility of use with highly diversified characteristics. so that any application requirement whatsoever can
be met with excellent results.
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Angular encoders, Angular sensors
