Encoders & Resolvers

June 2008

Incremental Rotary Encoder
The CH25 incremental rotary encoder from Celesco Transducer Products has a powder- coated enclosure rated for use in IP67 environments. It has a 2 1⁄2 -inch square flange and a 3⁄8-inch diameter shaft.

The encoder will handle input voltages from 5 to 30 VDC and ships with a push-pull output driver and a quadrature signal format. Its available resolution range is 100 to 5,000 pulses per turn. Electrical connections are achieved with a universally accepted M12 connector; an additional shielded 6 1⁄2 -foot cord set is also available. The encoder weighs just 10.5 ounces.

For Free Info Visit http://info.hotims.com/15132-320

Encoder Interface
Swiftcomm is a wireless interface for encoders from BEI Industrial Encoders (Goleta, CA). Unlike other wireless technology such as Wi-Fi, SwiftComm’s fast boot-up and transmission time allow it to seamlessly interface with existing control systems. Simply connect the SwiftComm transmitter to your encoder and the SwiftComm receiver to your control system and apply power. Costly and time-consuming cabling can now be a thing of the past.

The SwiftComm system includes the transmitter-receiver pair, which communicates using a point-to-point, 2.4 GHz RF protocol. SwiftComm’s proprietary radio protocols include a broad security code range, data encryption, handshaking, and error checking that together provides a secure and robust wireless interface system. Ruggedness and flexibility are further enhanced with SwiftComm’s NEMA 4 weatherproof enclosures, panel mounting options, antenna choices and wide-range DC power inputs.

For Free Info Visit http://info.hotims.com/15132-321

April 2008

Absolute Encoder
The Acuro(TM) AD34 and AD35 absolute encoders from Dynapar (Gurnee, IL) utilizes the company’s proven OptoASIC engine for reliable absolute positioning and speed feedback up to 10,000 RPM. This high-speed capability, coupled with an operating temperature range of up to 120°C, suits it for servomotors. In addition to its compact 37 mm diameter and short mounting depth, the encoder is available with a Mylar code disc capable of up to 17 bits of single-turn resolution.

The OptoASIC technology enables the user to transition to a digital drive system. The encoder will provide digital position data up to 17 bits over the BiSS interface with a variable clock rate up to 10 MHz. An integrated diagnostic system controls and regulates the data signals within the encoder. Maximum motor uptime is achieved through monitoring system errors or component aging, before they affect the encoder’s functionality. A code plausibility check guarantees that the output data always represents true position. The encoder’s notched 6 mm shaft allows one-step mounting, simply by pressing it on the motor shaft and then securing a flexible tether or torque arm. The encoder has a traditional hub shaft that eliminates the need for flexible couplings.

For Free Info Visit http://info.hotims.com/15128-305

December 2006

Magnetic Encoders
Baumer Electric (Southington, CT) released four magnetic encoders for harsh or contaminated environments. The devices come in diameters of 30 and 40 mm. The EcoMag 30 and EcoMag 40 are incremental encoders, offering resolution from 2 – 1,024 ppr. Their absolute counterparts, the MagRes 30 and MagRes 40, provide single-turn resolution up to 10 bits and SSI output. Maximum rotational speed for the sensors is 12,000 rpm. The 30 mm sensors have shaft diameters of 5 mm; the 40 mm hollow shaft sensor accepts shaft diameters of 12 mm. Both models are resistant to high shock and vibration.

For Free Info Visit http://info.hotims.com/10958-327

October 2006

Angle Encoders
Heidenhain (Schaumburg, IL) expanded its ERA 4000 series of angle encoders with the ERA 4×80, 4×81, and 4×82 versions. The ERA 4x80 is mounted using a centering collar method, with a low profile encoder system. With seven standardized diameters, system accuracies are offered with the 20 μm grating period version from ±6.1 arc seconds with the smallest diameter to ±2.8 arc seconds on the largest. The ERA 4×81 is a weight-reduced T profile version, mounted using the 3-point centering method. Encoder system accuracies of ±8.6 arc seconds are offered with the smallest diameter of the series using 20 μm grating periods and ±2.8 arc seconds for the largest diameter. The ERA 4×82 uses the 3-point centering method for installation. It lacks a centering collar, and offers system accuracies from ±5.1 arc seconds to ±2 arc seconds for the largest diameter.

For Free Info Visit http://info.hotims.com/10952-301

Magnetic Ring Encoder
Madison Electric Products (Mentor, OH) has released the Model HPRT C-Face Magnetic Ring Encoder, compatible with AC vector drive applications. Standard features include digital square wave quadrature-signal (064, 128, 256, 512, 1024, or 2048 cycles per revolution), stainless steel components, detachable screw terminal block, and differential line driver output. A feeler gage to set the air gap (0.020 to 0.040") is provided. Both sides of the rings are C-face mounts. Input voltage is 5 VDC or 7 to 24 VDC, operating temperature is -40°C to +125°C. Options include a synchronized on-board index pulse, cable with gland nut, and 7- and 10-Pin MS or 10-Pin heavy-duty industrial connectors. The unit is short circuit protected.

For Free Info Visit http://info.hotims.com/10952-324

June 2006

Rotary Encoders
Pepperl+Fuchs (Twinsburg, OH) has introduced the 40-mm-diameter, IP54-protected TVI401 Series incremental rotary encoders capable of providing pulse outputs of up to 1024 ppr. Offering a tangential cable outlet for buckle-free connection, the encoders operate at 4.75 to 30 VDC with short-circuit-proof, push-pull output, or 5 VDC operation with RS-422 functionality. The encoders use Opto-ASIC technology and can accept heavy loads via a loadable metal disk.

For Free Info Visit http://info.ims.ca/5659-322

February 2006

Linear Encoders
Heidenhain Corp. (Schaumburg, IL) has introduced LC absolute linear encoders with multiple scanning units for use with machine concepts where more than one slide is moving along a machine axis — especially through directly driven linear axes. The multi-unit linear encoders include the bidirectional digital EnDat 2.2 interface, which outputs absolute position values, and requests or updates information stored in an encoder.

For Free Info Visit http://info.ims.ca/5655-330

Rotary Encoders
RESM rotary/angle encoders from Renishaw (Hoffman Estates, IL) combine stainless steel mounting ring/scale and dirt-filtering options with signal processing and IN-TRAC™ auto-phase bidirectional optical reference mark. The device offers speeds to 3,600 rev/min and accuracy to ±0.5 arc seconds, with resolution and repeatability to 0.02 arc seconds. The encoders are available in a range of shaft diameter sizes from 52 to 413 mm. The device is rated for temperatures to 85°C. Its taper mechanism corrects for eccentricity of the mounting shaft. The Si interfaces can be mounted remotely and a small connector on the readhead cable enables feed-through where access is restricted.

For Free Info Visit http://info.ims.ca/5655-313

Wire Draw Encoders
SICK Stegmann (Dayton, OH) has released the PRF incremental wire draw encoders providing resolution to 0.025 mm at lengths to 50 m. They are available with HTL or TTL interfaces. The encoders consist of the wire draw mechanism and an encoder. The rotation of the drum is proportional to the length being measured. The drum rotation is converted to an incremental signal, which is transmitted by a standard rotary encoder.

The encoders are suitable for applications including crane, drilling, and excavator systems; presses, punching, and injection machines; weir systems and locks; high-bay shelving and theater stages; woodworking and stone processing machines; machinery construction; and medical technology.

For Free Info Visit http://info.ims.ca/5655-319

December

Magnetic Incremental Encoder
The MagRes magnetic incremental encoder from Baumer Electric (Southington, CT) monitors speed and slip on the wheels of trains, transit vehicles, and heavy equipment. The encoder is used on each axis of the vehicle and mounted onto the wheel hub. It features a cast iron and graphite housing, a speed range from 0 to 1,500 rpm, and a temperature range of -30 to 85°C. It has a 6" diameter and a 3" depth, and can withstand high levels of shock and vibration.

A cable with a specially designed connector, cable gland, and protective cover resists kinking, creasing, and bending in extreme operating conditions. The encoder features a redundant signal output that allows the controller to verify the encoder’s output data.

For Free Info Visit http://info.ims.ca/5294-310

Incremental Encoders
SICK Stegmann (Dayton, OH) has introduced the DGS60 incremental encoders that are IP67-rated and offer resolution up to 10,000 pulses. Six- and 10-mm solid shaft versions are available, with servo flange or face mount flange. They are also available with through or blind hollow shafts with connector or cable outlet, and TTL or HTL electrical interfaces. The incremental encoders are applicable for use in machine tool, textile, and packaging applications.

For Free Info Visit http://info.ims.ca/5294-311

Linear Encoder
Heidenhain Corp. (Schaumburg, IL) offers the LS 1679 sealed linear scale with an integrated roller guide. The encoder is available with a resolution of 5 µm or 1 µm after four-fold evaluation. It has no plug cable assembly, and is available with left and right cable exit for mechanical compatibility with press brakes. The four ball bearings of the carriage are guided along two steel rails that are integrated in the aluminum housing. The position of the guide in the encoder protects the bearing surfaces from dust or contamination. Standard measuring lengths up to 470 mm are available, with longer lengths to 720 mm also available.

For Free Info Visit http://info.ims.ca/5294-320

August

Rotary Encoder
Micronor's (Newbury Park, CA) MR312 ZapFree™ Incremental Rotary Encoder is a passive, fiber-optic rotary encoder for harsh and hazardous environments. The all-optical design requires a single multimode 62.5/125 optical fiber connection to the remotely located MR310 Remote Encoder Interface (REI) module. MR312 offers immunity to EMI/RFI in industrial environments, is insensitive to lightning and atmospheric static, and allows link lengths to 1,000 m. It is available in standard size 58 (58-mm OD) encoder housing; standard (-40°C/+80°C) or extended temperatures (-60°C/+150°C); and 100/256/360 ppr configurations.
For Free Info Visit http://info.ims.ca/5215-302

June

Optical Angle Encoders
Signum™ RESM optical angle encoders from Renishaw (Hoffman Estates, IL) are comprised of the RESM ring, SR readhead, and Si interface. The encoders offer accuracy to ±0.5 arc second, and resolution and repeatability to 0.02 arc second.

Available in industry standard ring diameters from 52 mm to 413 mm, the encoders feature a 20-µm scale marked on the ring periphery and an embedded IN-TRAC™ auto-phase optical reference mark, which is repeatable, regardless of direction. Suitable for direct drive rotary (DDR) motors, the encoders eliminate position error and backlash while delivering speeds to over 3,600 rev/min.
For Free Info Visit http://info.ims.ca/5081-309

April

Rotary Encoders
RVI25 Series Incremental Rotary Encoders from Pepperl+ Fuchs (Twinsburg, OH) are available with a choice of 1/4" and 3/8" shafts and servo or face mounts. They offer a rugged, 2.5" diameter housing with IP54 protection (optional to IP65) and a variety of options (e.g., a unique alarm output) making them suitable for industrial applications. Electrical options include push-pull and RS-422 outputs with either Mil-Spec connectors or cables. The units offer outputs of up to 5,000 ppr, with operating voltage of 10-30 VDC or 5 VDC.
For Free Info Visit http://info.ims.ca/4834-300

Feedback Encoder
MicroE Systems (Natick, MA) offers the Mercury™ 1800 (M1800) digital kit encoder, available in 50 nm and 100 nm resolutions (linear), or up to 6.5 million CPR (rotary). Just 8.9 mm tall it provides 50-nm resolution from the sensor. All electronics are inside the sensor, making it suitable for high-noise industrial applications.

The encoder’s high resolution minimizes cogging for smooth motion control, while its 1-LSB optical index (integrated into the scale) allows system repeatability and ease of setup. Two connector options are available: an EMI shielded, standard high-density D-sub connector and a high-density micro connector. RS-422 compatible, digital A-quad-B output is standard.
For Free Info Visit http://info.ims.ca/4834-302

Motor Feedback System
Sick Stegmann (Dayton, OH) offers the SKS 36 SinCos Motor Feedback System with HIPERFACE interface. The rotary encoder features innovative Mini-Disc (MiDi) technology, a very small code disc with a 2-mm track radius. This permits integral (full) scanning of the entire code disc, eliminating eccentricity errors of the code disk, ball bearings, and shaft. Mounted in the center of the axis of rotation, high angular velocities are no longer limited by the code disk.
For Free Info Visit http://info.ims.ca/4834-305

All-Optical Encoder
With no mechanical contacts, Elma Electronic’s (Fremont, CA) alloptical encoder uses infrared LEDs for signal generation and a proprietary magnetic system for indexing. The E50 encoder has a rotational life of over 10 million rotations for military, medical, industrial, and other mission-critical applications.

The E50 utilizes an LED system to shine light through a coding rotor mask. With various shapes on the mask creating different keying sequences, it outputs two unique pulse trains 90° apart. It is available in 24 or 32 pulses per channel per rotation versions with four standard switching torques (1.5, 1.3, 0.6, and 0.45 Ncm).
For Free Info Visit http://info.ims.ca/4834-306

Optical Encoder
The Series 62M Magnetic Detent Optical Encoder from Grayhill (La Grange, IL) has an ultra-smooth detent feel and a minimum of 10 million rotational cycles. The encoder is available in 16 and 24 positions. Additional choices include an optional pushbutton and a choice of cable lengths. The switch can be customized including terminations, shaft, and bushing configurations and resolutions to meet specific requirements.
For Free Info Visit http://info.ims.ca/4834-308

Rotary Absolute Encoder
The second member of Gurley Precision Instruments’ (Troy, NY) new family of true absolute rotary encoders, the A58, is a high resolution compact encoder for applications requiring precise measurements of distances and angles in a relatively small package.

The low cost and high accuracy of this encoder make it a suitable solution for practically all applications requiring absolute positioning. Mechanical features include a 58-mm diameter aluminum housing, a 3-mm to 0.25" diameter stainless steel shaft, and precision ball bearings. Output formats include serial, parallel, and multiplexed versions of Gray code or natural binary.
For Free Info Visit http://info.ims.ca/4834-314

Large Bore Encoder
The HS45 encoder from BEI Industrial Encoder Division (Goleta, CA) accepts motor shafts up to 1-5/8" in diameter (1-7/8" optional) and provides data for position and velocity control. This model incorporates the precise feedback capabilities of an optical encoder with an easily mounted configuration to larger motors. There is no need to step down or alter most large motor shafts. The encoder provides an option for dual electrically isolated outputs, allowing a quick connection change to get it back up and running quickly if one set of outputs sustains electrical damage. Alternatively, the dual output can be used to feed two different controllers from a single encoder.
For Free Info Visit http://info.ims.ca/4834-318