With a very compact design, the encoder measures only 50 mm in diameter and 20 mm deep. This makes the encoder easy to fit into tight areas where installation space is limited. In addition, its large through-hollow shaft eliminates the need for additional space at the shaft end, while enabling installation anywhere on the motor shaft.

The new series completes the company’s HDmag encoder portfolio, which excels through absolute reliability, non-contact magnetic sensing and maximum availability. MHAD absolute encoder unites high-precision incremental and absolute signals in a single device. Its additional incremental signal of up to 8192 steps per turn offers speed feedback while its current position will be output as absolute value with 16-bit resolution. The air gap and the large permissible tolerances on axial and radial tolerances allow for quick and safe installation of the encoder. Its LED serves as an installation aide as well as an activity indicator.

In its standard configurations the encoder offers IP67 protection, enabling it to withstand operating temperatures ranging from -40°C to +85°C. The encoder’s magnetic sensing technique and robust design delivers dependable operation not only in humidity and dust but also during severe vibration and shock.

Motion Control Tips

Absolute encoders can be either single-turn or multi-turn. Single-turn encoders are well suited to short travel motion control applications where position verification is needed within a single turn of the encoder shaft. Multi-turn encoders, on the other hand, are better for applications that involve complex or lengthy positioning requirements.

Absolute encoders have a number of advantages. First is the non-volatility of memory. An absolute encoder works as a non-volatile position verification device. True position is not lost if power is lost or the system moves while power is switched off. A continuous reading of position is not needed. This is specifically useful in those applications, such as satellite-tracking antennas, where position verification is key.

Absolute encoders also provide programming flexibility. By removing the need for system homing, the encoders can be controlled to give positioning programs based on setting up reference from point-to-point, rather than from a home position. Additionally, a microprocessor interface module allows for programming various operating parameters, such as resolution.

Safety is another benefit. In some applications where a loss of position could lead to operator injury or machine damage, an absolute encoder automatically provides position verification when the power is switched on.

Absolute encoders also have good immunity to electrical noise. The device determines position by frequently reading a coded signal. Stray pulses from electrical noise will not build up and accurate position is presented again on the next reading.

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Available in a modular package, this high-resolution absolute optical encoder can be mounted in space-limited locations with several mounting requirements, effectively shortening assembly time and simplifying design.

The AEAT-9000 single-turn encoder provides a maximum of 17-bit resolution for accurate angle measurement in a full rotation of 360 degrees. The modular design of the encoder consists of a high-precision code disc and a read head module. Unlike traditional encoders, the AEAT-9000’s modular package allows it to be integrated directly on the motor, offering better overall performance and system cost savings. The absolute encoder leverages differential external and internal signal paths as it provides optimum noise cancellation for industrial environment’s robust system noise-immunity. This makes it suitable for factory automation equipment, high-precision test and measurement equipment, industrial and maritime valve control applications, servo motors and more.

With 2048 counts per rotation, the new AEAT-9000 absolute encoder offers precise positioning with two-channel true differential Sine/Cosine outputs as well as A/B incremental analog outputs. Its multiple output configurations provide flexibility to support both incremental and absolute position information. The encoder also comes with photo detectors for electrical alignment on the tilt and radial.

Additional features of the AEAT-9000 encoder includes on-chip interpolation and code correction that compensate for mounting tolerance, an integrated monitor track for monitoring LED light level and a selectable direction for Up/Down position counters.

Motion Control Tips

A series of non-contact, infrared probes offer operator-assisted visual notification through a laser stripe showing the measured area. A tube or wire allows operators to view acquired data points during the inspection process. The probes can be interchanged with traditional ball probes without requiring for re-calibration and presenting true plug-and-play capability. Flanges, bosses, brackets or other geometric features can now be integrated in the measurement routine. Aside from saving time, its no re-calibration feature also offers the field an extra layer of error proofing. ROMER’s legacy systems enables measurement of the most versatile wires or tubes with diameters ranging between 4 mm to 130 mm, without risk of deflection.

In summing up the latest tube inspection line of ROMER, Zvonimir Kotnik, Director of the Business Management group of Hexagon Metrology, Inc., said, “The straightforward operation of the overall system guarantees simple, flawless operation. By making the measurement process easier for the operator, we have improved efficiency, accuracy, and productivity for the entire tube shop”.

Based on the patented ROMER Absolute Arm portable CMM, the system’s proprietary absolute encoders are fitted in the arm’s primary axes, enabling the arm to know the exact position of its joints and effectively eliminating antiquated homing procedures. To stabilize its weight for effortless control above and below its centerline and for one-handed operation, the articulating arm comes with low profile, Zero-G counterbalance.

Motion Control Tips

Featuring internal electronics that are resistant to condensation and contamination, the new A3M is ideal for use in outdoor applications and harsh environment. Based on the design of magnetic technology that utilizes few moving parts, the new encoder’s advance versions can communicate through the DP V2, wherein Profibus can be directly used by motion control applications instead of a secondary motion control bus.

The new encoder’s conformal coating for resistance against a high IP rating and condensation makes it suitable for outdoor applications such as cranes and outdoor warehousing systems. The advanced models of the A3M60, which provides the DP V2 protocol, can be utilized in motion control applications where fast cycle times and speed are very important.

Aside from bag forming, palletizers, labeling, filling, sealing, and folding machines, the A3M60 can also be used in collision avoidance and position control applications. Other typical applications where the new encoder can be used include AGVs, assembly machine, welding and paint spraying robots.

The A3M60 is also suitable for the various needs of general manufacturing applications where a Profibus fieldbus network is utilized.

Motion Control Tips

Resolute was designed to deliver sub-micron accuracy and resolution to one nm. A true absolute encoder, Resolute automatically determines absolute position upon switching on, effectively eliminating the need for reference returns or battery backup.

The new absolute encoder utilizes a detection method that is similar to an ultra-high-speed digital camera reading from a fine-pitch, non-repeating barcode scale.

Users can easily capture images, analyze and interpolate them to fine resolutions of up to one nm, even when operating at a maximum speed of 100 m/sec.

With immunity from contamination, this technique achieves broader setup and running tolerances attributed to the absolute encoder’s dirt-rejection and cross-checking capability.

Renishaw guarantees safety since the absolute encoder has been integrated with separate checking algorithm, which regularly monitors position and ensures problems are flagged up before reaching the controller.

To provide users with remarkably higher-fidelity encoder feedback, Resolute offers a harmonious mixture of scale technology and high-performance redhead.

With Sub-Divisional Error (SDE) controlled to within +/-40 nm, the dynamic response of the absolute encoder is optimized. As standard on RELA Invar scales, Resolute offers overall accuracy that is better than +/-1 um, while high accuracy at lengths up to five m is offered on RSLA stainless-steel scales.

RTLA-S and RTLA rugged steel tape scales, which offer +/-5 um/m accuracy, quicker and easier installation as well as lengths up to 10 m, are also available.

Motion Control Tips

RESOLUTE’s high performance is the result of a unique method of operation. Think of the readhead as an ultra-fast miniature digital camera, taking photos of a scale that consists of a long, non-repeating bar code. RESOLUTE analyzes these photos to determine position with extremely low noise (jitter) and SDE (Sub-Divisional Error). This increases encoder feedback fidelity and ensures smoother velocity control and positional stability.

Using a unique single-track optical scale, RESOLUTE acquires absolute position immediately upon switch-on, without battery back-up, simplifying machine design by completely eliminating the need for reference returns. The system’s ruggedness, ultra-high speed capability and exceptional resolution make it ideal for high-performance lathes, as well as slower-moving axes requiring the highest levels of precision and motion control integrity.

To learn more, visit:

http://www.renishaw.com/en/resolute-absolute-optical-linear-and-absolute-optical-rotary-angle-encoder-system–10852

www.renishaw.com

Motion Control Tips

Expanding on the established ExI 13xx and ExI 11xx series, the HEIDENHAIN ECI 119 is a single turn, absolute encoder offering 524288 (19 bit) positions per revolution, and provides ±90” system accuracy.

The ECI 119 is a bearingless design, eliminating problems with bearing wear or loading, and concerns of mechanical self-heating of the encoder and shaft currents. If all the mounting tolerances are met, the encoder requires virtually no maintenance outside of contamination protection.

The ECI 119 uses HEIDENHAIN’s EnDat serial data interface. Two types of output are offered:  purely serial data (EnDat21) or serial data with 1 Vpp incremental signals (EnDat 01). The SSI interface can also be implemented, but requires a minimum value order. Not only does EnDat allow the user to transfer incremental and absolute position data, it also enables online diagnostics.

A new version of the Adjusting and Testing Software is available with the ECI 119. This software allows diagnostic checks of the encoder position signals. And the new ExI Mounting Wizard allows the scanning gap and signal amplitude to be checked in order to assess mounting quality.

www.heidenhain.us

Motion Control Tips

The device can be used to replace potentiometer-based angle encoders by combining position and motor feedback in one component or for low-cost servo feedback in rotary and linear actuators. Absolute position feedback is also very useful for machine homing. The device’s multi-turn option consists of an integral rechargeable battery, which maintains full position information for 20 hours if machine power is removed,

Rotalink designs and produces a variety of gearboxes in spur and planetary gearbox designs that feature polymer gears on ball or sintered bearings. The range also consists of ovoid-style gearheads, which include planetary gear assemblies for the output stages and a combination of spur gears for input stages. These are available in a choice of ultra-polymer materials.

The new absolute encoders are included in the company’s latest catalogue, which also features three new ranges of DC motor technologies – brushless, rare earth and heavy case – and new brushless version of the Red Drive motion controller and several gearbox lines.

Motion Control Tips

NR25 EtherNet/IP DuraCoder Encoder Features:

• Up to 30 bit (65536 steps x 16384 revolutions) Resolution
• Absolute Single-turn and Multi-turn
• Power over EtherNet (PoE)
• Resolver-based Durability
• IP67 Ingress Protection Rating
• Solid Shaft and Hub Shaft Versions
• Stainless Steel Units Available
• ODVA Compliant

AMCI’s NR25 EtherNet/IP encoder comes standard with Power over Ethernet (PoE), making it possible to install this encoder using a single Ethernet cable that transmits data and power. The connector and cabling requirements are cut in half, plus installation is simpler and less expensive. Additionally, the ability to program with implicit and explicit messaging allows the NR25 series encoders to easily integrate with PLCs and PACs supporting EtherNet/IP. Position resolution, counting direction, velocity format, and presets are all configured easily through the EtherNet/IP port. And the ability to configure parameters simultaneously makes the NR25 encoder quick and easy to set up.

LEDs on the NR25 EtherNet/IP DuraCoders help technicians troubleshoot from the factory floor by displaying diagnostic information including module status, network status, and link/activity status.

The ODVA compliant NR25 EtherNet/IP encoders are offered in a 2.5” diameter package with two M12 connectors on the back, supplying power and EtherNet/IP connectivity. Using Power over Ethernet, users can save time and money while also simplifying wiring, as only one connector is needed for power and EtherNet/IP connectivity. The NR25 encoder is resolver based, meaning that it was designed to provide absolute position feedback without glass discs or sensitive LED components, enabling it to withstand high levels of shock and vibration. The IP67 rated package is the solution for single-turn and multi-turn position applications requiring protection from dust and water ingress. Stainless steel versions are also available for food grade and marine environments.

Advanced Micro Controls Inc.
www.amci.com

Motion Control Tips

This single turn absolute encoder provides 16-bits of resolution over 360 degrees of shaft rotation. The HBA4 is available with a 12mm or 0.500” diameter bore size with either a ball bearing or sleeve bushing bearing assembly and is sealed to an IP66 rating.

The absolute encoder slips over a shaft and is locked in place with a non-marring clamp mount. A flexible anti-rotation tether provides single point mounting for bolt circles ranging from 2.50” up to 5.00” in diameter and compensates for shaft run out. The HBA4 communicates serially to a host via the industry standard RS485 bus.

US Digital
www.usdigital.com/hba4

Motion Control Tips

With its sturdy bearings and enclosure, the Leine & Linde 1000 series encoder achieves extraordinary durability in all applications with similar demands. The enclosure, rated IP67, easily protects the encoder’s internal components from dust and liquids. Stainless steel housing is available as a special option.

Different incremental and absolute versions of the 1000 series are available, and a combination of the various encoder types can even be integrated in the same 1000 series product. For the first time ever, absolute pulse encoders with the PROFIBUS interface can now be used in extremely tough industrial environments by using this 1000 Series from Leine & Linde. The absolute variants are also available with interfaces such as SSI, EnDat, CANopen, DeviceNet™ or with a parallel output with resolutions up to 25 bit.

Leine & Linde
www.leinelinde.com

Motion Control Tips

Sensor Protect technology incorporates fully-encapsulated electronics and a separate mechanical bearing assembly, which provide an IP69K protection rating for both the encoder housing and flange. Due to this design, the Sendix M3658 and M3678 encoders can withstand the high-pressure water or steam cleaning that construction machinery requires without experiencing humidity or moisture ingress.

The encoders’ robust interlocking bearing design utilizes Safety-Lockplus technology that mechanically protects the shaft seal, allowing it to better tolerate installation errors and abrasion. A high resistance to shock and vibration enhances the encoders’ reliability, thus ensuring machines and motors run safely and dependably–without costly downtime due to repairs or unnecessary shutdowns.

The Sendix M3658 and M3678 encoders provide a resolution of up to 14 bits and a non-contact, wear-resistant measuring system. With the wide temperature range from -40 to 85° C and a high resistance to humidity, the encoders are well equipped to withstand outdoor applications that experience wide temperature fluctuations.

The new encoder series is equipped with a two-color LED located on the rear of the housing that indicates safe operation or fault status, as well as internal diagnostic status. A compact, 36 mm housing design allows the encoders to be easily installed in areas where space is limited.

TURCK
www.turck.us

Motion Control Tips

“Often the differences between two encoders seem to be small, and this guide will help users quickly and easily identify these differences en route to selecting the right encoder for a given application,” says Cathy Castle, Marketing Manager for SICK STEGMANN, INC.

The guide includes a helpful dictionary of some of the most commonly used technical terms, as well as a helpful overview describing the primary differences between incremental and absolute encoders; absolute single-turn and absolute multi-turn encoders; as well as wire draw encoders and linear encoders.

SICK STEGMANN, INC.
www.stegmann.com

Motion Control Tips

F36 singleturn encoders have a resolution of up to 17 bits; multiturn encoders have a resolution of up to 41 bits with over 16 million revolutions. An IP 67 protection rating and a temperature range of -40 to 90°C ensure the encoders are able to withstand harsh environmental conditions.

Kübler by TURCK encoders employ state-of-the-art OptoASIC technology with high integration density that results in fewer components and connection points, increasing operational reliability. The encoders additionally offer a patented Safety Lock™ bearing structure, which enhances their ability to withstand vibration and eliminates installation errors.

TURCK
www.turck.us

Motion Control Tips

This Leine & Linde series supports 13-bit singleturn or 25-bit multiturn with screw terminal or miniature M12 connection. Mechanically, various shafted- and hollow-shafted versions are available. The DeviceNet™ encoder supports encoder profile revision 2 and the functionality has been fully tested in compliance with the ODVA conformance test.

Overall, fieldbus technology is rapidly gaining acceptance and integration into automation applications worldwide. Based on network topology, system requirements and performance, various types of fieldbus systems are available, all developed and supported by individual standardization organizations. The key principle of fieldbus technology is to enhance device functionality, achieve communication transparency, simplify and standardize installations, as well as limiting the installation and maintenance costs. Sensors, like encoders, with support for various fieldbus interfaces have been available for several years and are increasingly gaining in acceptance and installed market share.

www.leinelinde.com

Motion Control Tips

A robust and secure wireless interface, SwiftComm has the built-in reliability needed for real-time industrial control. Able to interface with any SSI absolute or incremental sensor, SwiftComm allows critical position and speed feedback data to be seamlessly sent to control systems without expensive cabling. The SwiftComm system includes the transmitter-receiver pair, which communicates using a point-to-point frequency-hopping 2.4 GHz RF protocol. SwiftComm is ideal for a wide variety of industrial applications where cable runs are expensive to install and maintain.

www.beiied.com/wireless

Motion Control Tips

Using a simple PC interface, this module can be programmed through the USB port for number of bits with absolute encoders. For incremental encoders, count mode (X1, X2, X4), reset, preset, and preset/reset on index are programmable through the USB. Incremental encoder counter register length is programmable, up to 32 bits. The Dual Encoder to USB Converter is ideal for system setup and debugging, data acquisition, analysis, monitoring and PC based control applications.

www.beiied.com

Motion Control Tips

Products offered by the new Baumer Motion Control division will include incremental and absolute encoders, magnetic encoders, intelligent compact drives for actuators and positioning systems, heavy duty encoders, heavy duty tachogenerators, absolute encoders with fieldbus interfaces, mechanical and electronic counters and tachometers, electronic shaft positioning systems with absolute sensing, compact incremental encoders, ultra-precise encoders with sine output signals, and incremental encoders with large hollow shaft diameters.

www.baumergroup.com

Motion Control Tips

www.beiied.com

Motion Control Tips