Posted on Leave a comment

Dynapar ACURO absolute encoders


The Danaher Industrial Controls Group (DICG) announced an expansion of its Dynapar ACURO series of absolute encoders with two new models that incorporate the company’s new opto-ASIC technology platform. ACURO is already a market leader in several key performance metrics, such as communication compatibility, networking speed, high resolution, and lowest current draw, among others.

The application / function are as follows:
The new opto-ASIC platform extended throughout the ACURO line now provides advantages that make absolute encoder technology applicable to a wider range of motion control and servomotor feedback applications. The new ACURO 36 and ACURO 110 models extend the ACURO series to applications in the small motor, packaging and textile machinery, and medical equipment sectors.

Absolute encoders improve machine reliability because, unlike incremental encoders, they always know their position, even at startup or after a power failure. DICG technology and manufacturing breakthroughs have reduced the cost of absolute encoders, so that they are now finding acceptance in every kind of application, not just the high end, demanding few.

Broader range of sizes – Only 36mm in diameter, the new hollowshaft ACURO 36 encoder is more than a third smaller than previous models in the ACURO line. At 110mm, the new hollowshaft ACURO 110 encoder accepts shaft sizes up to 50mm. Both are available in motor drive or standard industrial versions.

Low-profile gears shrink size, increase reliability – The ACURO 36 is one of the few encoders that use a gearbox instead of a battery to provide multiturn resolution. The low-profile mechanical gearbox allows a lower installation height than battery-buffered counter solutions.

Thin as a dime, the gear set facilitates an installation depth of just 31 mm – one of the shortest in the industry. Small encoders are especially important to motor OEMs, who are under pressure to continually shrink their designs.

In addition, the gears eliminate dead batteries as a potential source of downtime, and eliminate the need for battery maintenance. Running at speeds up to 12,000 rpm, the gear set is nonmagnetic and immune to interference in such applications as welding or motors equipped with powerful brakes.

New OPTO-ASIC generation platform:
The ACURO 36 and ACURO 110 encoders are based on DICG’s new generation platform based on opto-ASIC electronics, into which multiple functions are highly integrated. ACURO was engineered for field dependability, re-designed from the predecessor’s 150 parts and five circuit boards to less than 30 parts and just one board. Reliability is enhanced by minimizing the number of printed circuit boards and soldered connections. The new electronics also enabled Danaher designers to increase the temperature specs on the motor drive version to an industry-leading 120 degrees C – ideal for today’s smaller, hotter running motors.

The ACURO Series has the lowest current draw of any absolute encoder, at just 45mA for the single-turn version and 85mA for the multiturn version.

The new platform is consistent across DICG’s manufacturing plants worldwide. Globally based companies are assured of receiving the same design encoder no matter which region it was manufactured in. This allows company managers to reduce costs through component standardization.

The most communications protocols -The ACURO Series encoders can communicate with any type of control system using common formats, ranging from parallel to such field buses as profibus, DeviceNet, CANopen, CAN Layer2 Interbus, and SSI.A 2048-step sine/cosine signal (1Vpp) is also available for dynamic control. No other encoder offers as many communication options.

Network speeds five times faster:
The ACURO Series was the first to use the new BiSS (Bidirectional Synchronous Serial Interface) protocol. This freely licensable, open-standard protocol supports networking speeds five times faster than proprietary encoder protocols. Using the BiSS protocol, engineers free themselves from restrictive, proprietary bus standards, and achieve data throughput up to 10Mbaud using standard drivers and cables longer than 50m.

As BiSS is all digital, it eliminates the added cost of A/D converters needed in drive systems that connect to encoders using proprietary protocols. BiSS is hardware-compatible with the SSI protocol, simplifying integration.

Differentiate features are:
High accuracy:
The ACURO 36 offers up to 12-bit multiturn and 22-bit single turn resolution – one of the highest accuracy encoders on the market. The ACURO 110 offers 17-bit single turn resolution. High resolution allows precise control of machine motion and increases machine reliability.

More diagnostics than any other encoders:
The new ACURO Series offers more built-in diagnostics and alarms to monitor current and temperature than any other encoder. Optical sensors internally monitor the amplitude of the encoder signals, and exceeding the limit values will result in warning messages. A single-step code check ensures that the encoder signal reflects the recorded turn, bit by bit. The internal signal processing function checks each individual increment for possible occurrence after the previous event. Any violation of this rule, possibly due to disk breakage or mechanical overload, will lead to an alarm.

In addition, a self-monitoring feature checks the operating hours and signals a warning message to initiate preventive maintenance. What’s more, the BiSS protocol can report operation information that can be used diagnostically, such as torque, temperature, and acceleration.

Posted on

TWK-Inductive Linear Transducers

Inductive Linear Transducers for engineering and instrumentation.

The half-bridge technology for 1 to 360 mm stroke. The wide range of inductive linear transducers includes items with 10, 12 and 25 mm outside diameter and for measuring ranges from 1 to 360 mm. The smaller IW 10 and IW 120 series require external electronic modules for excitation and signal conditioning. IW 250 series with 25 mm housings have integral electronics consisting of oscillator, demodulater and amplifier. Analogue output signals are either 0(4) to 20 mA, 0 to 10 VDC or ± 10 VDC for full range or calibrated strokes. The transducers are completely potted to meet protection grades up to IP 68. Electrical connection is made either by leads, plug and socket or through cable glands. Various mechanical configurations are available to suit specific mounting conditions.

The IW 260 displacement transducers operate according to the new principle of fractional inductivity allotment within the hollow coil. Depending on the position of the core the inductivity changes within the corresponding coil section. This kind of layout provides for more position data than the classical half-bridge or LVDT configuration. An integral electronic circuit transforms these data into a signal proportional to the displacement of the plunger core.

The electronic circuit contains an oscillator, a demodulator, an amplifier and in some cases a current output source. Its SMD-design is short-circuit proof and protected against reverse polarity. The sensor system is completely sealed within a non-corrosive steel case to ensure positive protection against vibration, shock, humidity, oil and corrosive matter.

The new principle of fractional inductivity allotment as described above brings about an outstanding increase of the measuring stroke. In comparison to the IW 250 model the useful range of the IW 260 model increases by 70 to 100% based on the same length of the case.

Learn More

Posted on

Opkon-Wire Draw Position Potentiometers & Encoders.

Draw Wire Potentiometer:

● Potentiometric, voltage divider
● Easy mounting
● High protection degree
Main Applications:
Offers easy mounting and quick solution for linear transducers
Hydraulic transducers
Medical applications
General automation applications

  • Measurement type Resistive
  • Linearity 0,5%, 0,1% or 0,05%
  • Measurement stroke – 800mm, 1800mm
  • Output signal type Voltage divider
  • Output signal Analogue voltage
  • Supply voltage + 28 VDC max
  • Electrical connection 2.5 meter cable (standard)
  • Working temperature -20°C ….+80°C
  • Case material Plastic, steel
  • Protection Degree IP 64

Draw Wire Encoder:
● Incremental output
● Easy mounting
● High protection degree
Main Applications:
Offers easy mounting and quick solution for linear transducers
Hydraulic presses
Wood working, profile and metal processing machinery
Medical applications
General automation applications

  • Measurement type Optical
  • Resolution 200mm/1000pulse
  • Measurement stroke – 1000mm, 2000mm,3000mm,4000mm
  • Output signal type Totempole, TTL, Linedriver or HLD
  • Output signal A, B, Z or A,A’, B,B’, Z, Z’
  • Supply voltage 8-24 VDC or 5VDC
  • Electrical connection 2.5 meter cable (standard)
  • Working temperature -20°C ….+80°C
  • Case material Plastic, steel
  • Protection Degree IP 64

Opkon Literature …

…. Learn More



Posted on 1 Comment

Tekel Bicoder

The Bicoder® are an encoder family with a monolithic structure equipped with two discs, two electronics, two reading systems completely different from each other, operating on the same shaft.

The bicoders can be either incremental or incremental/absolute.

Incremental Bicoder®
They are manufactured with two incremental discs with a number of lines different or equal to each other.
The resolution can be between from 2 to 9000 square-wave pulses per revolution on unidirectional, bidirectional version with or without absolute zero index.
Size and body dimensions are those typical models such as:
TK50 (F, SG, FRE) and  TK60H


  • Interface with limited counting frequency

It can be manufactured with a low resolution disc (for example 500 ppr) for fast displacement and with a high resolution disc (for example 5000 ppr) used for reaching, with low displacement, the tooling point.

  • Tachometric calculation + displacement control of an axis

A disc and its respective electronic will be dedicated to the control of the motor speed and the second disc and its respective electronic will be used as counting steps of an axis positioning.

  • Displacement control of two axis

Spindle rotation control + rotation control of a table
It is a typical application with a disc of 1024 steps per revolution for the control of the spindle and a second disc with a final resolution of 36.000-(9.000×4) ppr (equal to 1/100 of mechanical degree).

  • Incremental – Absolute Bicoder®

They are manufactured with an incremental disc and an absolute disc assembled on the same rotative shaft. The incremental disc can be chosen from 2 to 9,000 square-wave signals per revolution. The coded GRAY disc can have a resolution of up to 10 bit per revolution (1024 step per turn max).

The available resolutions for the absolute discs are:

  • 180-360-720
  • 64-128-256-512-1024
  • 500-1000

Incremental section:
The selection and  the characteristics will be those of the incremental encoders TK50 (F, SG, FRE) and TK60H series.

Absolute section:
The output code may be chosen from GRAY  BINARY  BCD and the related electronics will be those normally available for the absolute encoders TKC 50 and TKC 60H series.
Available electronics: NPN, PNP, Push-pull, Analogue interface and optional function: Up/down – Strobe – Parity (Even and Odd) – Zero point – Zero point intermediate (pre-signal).

For the analytic characteristics, please refer to the technical detailed specification of the chosen model shown on our single-turn absolute encoders TKC series catalogue.