Heidenhain encoder rod 426 pdf download

 
    Contents
  1. Heidenhain ROD426 Rotary Encoders
  2. Heidenhain ROD 426 2500 27S12-03 | ROD 426 | 376 846-LT | ROD426 |376-846-LT | 376 846 LT | TTL 5v
  3. Rotary Encoders November PDF
  4. ROD 426 Rotary Encoder

DATASHEET Rotary encoders for separate shaft coupling. This catalog supersedes all .. ROD ROD 3). ROD ROD Positions/rev: 13 bits. 50 to. lines. 1) (GSD) must be downloaded and imported into the. Rotary encoders with mounted stator coupling. Rotary Rotary encoders with integral bearing for separate shaft coupling. 9 . ROD HEIDENHAIN ROD b Industrial standard /b incremental rotary encoder with integral bearing and separete chaft coupling with 5v TTL Quadrature output and.

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Heidenhain Encoder Rod 426 Pdf Download

Full Line of Heidenhain ROD Rotary Encoders for seperate shaft coupling to and Rotary feedback whether your using a CNC or Manual Machine Tools. DOWNLOAD THE HEIDENHAIN ROTARY ENCODER CATALOG: CLICK HERE. Rotary encoders for separate shaft coupling. Rotary encoders from .. ROD ROD ROD 3 bits. to lines. to lines. to lines (GSD) must be downloaded and imported into the configuration. ROQ ROD ROD ROD ROD 28 s. Positions/rev: 13 bits. revolutions. Positions/rev: 13 bits. revolutions. 50 to.

These graduations are applied to a carrier substrate of glass or steel. These precision graduations are manufactured in various photolithographic processes. Graduations are fabricated from: extremely hard chromium lines on glass, matte-etched lines on gold-plated steel tape, or three-dimensional structures on glass or steel substrates. These processes permit very fine grating periods and are characterized by a high definition and homogeneity of the line edges. Together with the photoelectric scanning method, this high edge definition is a precondition for the high quality of the output signals. With the absolute measuring method, the position value is available from the encoder immediately upon switch-on and can be called at any time by the subsequent electronics. There is no need to move the axes to find the reference position. The absolute position information is read from the grating on the graduated disk, which is designed as a serial code structure or as on the ECN consists of several parallel graduation tracks. A separate incremental track on the ECN the track with the finest grating period is interpolated for the position value and at the same time is used to generate an optional incremental signal. In singleturn encoders the absolute position information repeats itself with every revolution. Multiturn encoders can also distinguish between revolutions. Circular graduations of absolute rotary encoders With the incremental measuring method, the graduation consists of a periodic grating structure. The position information is obtained by counting the individual increments measuring steps from some point of origin. Since an absolute reference is required to ascertain positions, the graduated disks are provided with an additional track that bears a reference mark.

Heidenhain ROD426 Rotary Encoders

Rotary encoders with clamping flange by the fastening thread on the flange face and an adapter flange see Mounting Accessories or by clamping at the clamping flange. The centering collar on the synchro flange or clamping flange serves to center the encoder.

The values given in the specifications for the shaft load are valid for all permissible speeds, and do not limit the bearing lifetime.

The diagram shows an example of the different bearing lifetimes to be expected at further loads. The different points of force application of shafts with 6 mm and 10 mm diameters have an effect on the bearing lifetime.

They are listed under file no. E Acceleration Encoders are subject to various types of acceleration during operation and mounting. The indicated maximum values for vibration apply for frequencies of 55 to Hz EN. Any acceleration exceeding permissible values, for example due to resonance depending on the application and mounting, might damage the encoder. Comprehensive tests of the entire system are required.

The maximum permissible acceleration values semi-sinusoidal shock for shock and impact are valid for 6 ms or 2 ms EN. Under no circumstances should a hammer or similar implement be used to adjust or position the encoder. Humidity The max. Condensation is not permissible. The natural frequency f N should be as high as possible. Protection against contact EN After encoder installation, all rotating parts must be protected against accidental contact during operation. The shaft inlet provides protection to IP 64 or IP Splash water should not contain any substances that would have harmful effects on the encoder parts.

If the standard protection of the shaft inlet is not sufficient such as when the encoders are mounted vertically , additional labyrinth seals should be provided. Many encoders are also available with protection to class IP 66 for the shaft inlet. The sealing rings used to seal the shaft are subject to wear due to friction, the amount of which depends on the specific application. Such applications require comprehensive tests of the entire system regardless of the specifications of the encoder.

The specifications given in the brochure apply to the specific encoder, not to the complete system. Any operation of the encoder outside of the specified range or for any other than the intended applications is at the user s own risk. In safety-oriented systems, the higherlevel system must verify the position value of the encoder after switch-on.

Mounting Work steps to be performed and dimensions to be maintained during mounting are specified solely in the mounting instructions supplied with the unit. All data in this catalog regarding mounting are therefore provisional and not binding; they do not become terms of a contract.

Any changes, even minor ones, can impair the operation and reliability of the encoders, and result in a loss of warranty. This also includes the use of additional retaining compounds, lubricants e. The operating temperature range indicates the temperatures that the encoder may reach during operation in the actual installation environment.

The function of the encoder is guaranteed within this range DIN. The operating temperature is measured on the face of the encoder flange see dimension drawing and must not be confused with the ambient temperature. Higher heat generation in the encoder means that a lower ambient temperature is required to keep the encoder within its permissible operating temperature range.

In 5-V versions, selfheating is negligible. The correlation between rotational speed and heat generation is nearly linear. These tables show the approximate values of self-heating to be expected in the encoders. In the worst case, a combination of operating parameters can exacerbate selfheating, for example a 30 V power supply and maximum rotational speed. Therefore, the actual operating temperature should be measured directly at the encoder if the encoder is operated near the limits of permissible parameters.

Then suitable measures should be taken fan, heat sinks, etc. For high speeds at maximum permissible ambient temperature, special versions are available on request with reduced degree of protection without shaft seal and its concomitant frictional heat. L2 min. It is therefore particularly recommended for use in applications with friction wheels, pulleys, or sprockets.

It prevents overload of the encoder bearing. Also, the threaded holes for fastening the stator coupling are already provided. D Mounting bracket for bearing assembly ID x 4. The following kits are available Wire torque support The stator coupling is replaced by a flat metal ring to which the provided wire is fastened. ID Pin torque support Instead of a stator coupling, a synchro flange is fastened to the encoder. A pin serving as torque support is mounted either axially or radially on the flange.

As an alternative, the pin can be pressed in on the customer's surface, and a guide can be inserted in the encoder flange for the pin. Tightening torque 0. The sinusoidal incremental signals A and B are phase-shifted by 90 elec. The illustrated sequence of output signals with B lagging A applies for the direction of motion shown in the dimension drawing. The reference mark signal R has a usable component G of approx.

Next to the reference mark, the output signal can be reduced by up to 1. This must not cause the subsequent electronics to overdrive. Even at the lowered signal level, signal peaks with the amplitude G can also appear. The data on signal amplitude apply when the power supply given in the specifications is connected to the encoder. They refer to a differential measurement at the ohm terminating resistor between the associated outputs.

The signal amplitude decreases with increasing frequency. Any limited tolerances in the encoders are listed in the specifications. For encoders without integral bearing, reduced tolerances are recommended for initial servicing see the mounting instructions.

For velocity control, interpolation factors are commonly over in order to receive usable velocity information even at low speeds.

Heidenhain ROD 426 2500 27S12-03 | ROD 426 | 376 846-LT | ROD426 |376-846-LT | 376 846 LT | TTL 5v

For special applications, other resolutions are also possible. The reference mark signal consists of one or more reference pulses U a0, which are gated with the incremental signals. In addition, the integrated electronics produce their inverse signals, and for noise-proof transmission.

The illustrated sequence of output signals with U a2 lagging U a1 applies for the direction of motion shown in the dimension drawing. The fault-detection signal indicates fault conditions such as breakage of the power line or failure of the light source.

It can be used for such purposes as machine shut-off during automated production. Reference-mark signal Pulse width Delay time Fault-detection signal Pulse width 1 or more TTL square-wave pulses U a0 and their inverted pulses 90 elec. The subsequent electronics must be designed to detect each edge of the square-wave pulse. The minimum edge separation a listed in the Specifications applies for the illustrated input circuitry with a cable length of 1 m, and refers to a measurement at the output of the differential line receiver.

Propagation-time differences in cables additionally reduce the edge separation by 0. The max. Measuring step after 4-fold evaluation Fault t S Inverse signals,, are not shown The permissible cable length for transmission of the TTL square-wave signals to the subsequent electronics depends on the edge separation a.

It is max. This requires, however, that the power supply see Specifications be ensured at the encoder. The sensor lines can be used to measure the voltage at the encoder and, if required, correct it with an automatic system remote sense power supply. The fault-detection signal indicates fault conditions such as failure of the light source.

The distance between two successive edges of the incremental signals U a1 and U a2 through 1-fold, 2-fold or 4-fold evaluation is one measuring step.

The minimum edge separation a listed in the Specifications refers to a measurement at the output of the given differential input circuitry. Measuring step after 4-fold evaluation Fault t S U as Inverse signals,, are not shown The permissible cable length for incremental encoders with HTL signals depends on the scanning frequency, the effective power supply, and the operating temperature of the encoder.

The bearing assembly can be fastened through the threaded holes on its face or with the aid of the mounting flange or the mounting bracket see page The following kits are available: Wire torque support The stator coupling is replaced by a metal plate to which the provided wire is fastened as coupling. ID Pin torque support Instead of a stator coupling, a synchro flange is fastened to the encoder.

A pin serving as torque support is mounted either axially or radially on the flange. As an alternative, the pin can be pressed in on the customer's surface, and a guide can be inserted in the encoder flange for the pin.

The encoder shaft is connected with the measured shaft through a separate rotor coupling. The coupling compensates axial motion and misalignment radial and angular offset between the encoder shaft and measured shaft. This relieves the encoder bearing of additional external loads that would otherwise shorten its service life. They can therefore also be mounted directly onto mechanical transfer elements such as gears or friction wheels.

The ROD is offered for very high bearing loads. The maximum permissible load of the shaft at shaft end is listed in the Specifications. The relationship between the bearing service life and the shaft speed at maximum shaft load is illustrated in the diagram for the shaft diameters 6 mm and 10 mm. With a load of 10 N axially and 20 N radially at the shaft end, the expected bearing service life at maximum shaft speed is more than hours.

Bearing lifetime [h] Bearing lifetime if shaft subjected to load Shaft speed [min 1 ] Bearing service life of ROD The ROD is designed for very high bearing loads together with long service life. The terminal box can be mounted in 90 offsets.

Shaft coupling The encoder shaft features a feather key for optimum torque transmission. The couplings C19 and C provided as accessories feature an appropriate holder.

These encoders operate as single-encoder systems with purely serial data transmission via EnDat 2. Reliable transmission of the position is based on two independently generated absolute position values and on error bits, which are then provided to the safe control.

This modular approach helps manufacturers of safety-oriented systems to implement their complete systems, because they can begin with subsystems that have already been qualified. Safety-related position measuring systems with purely serial data transmission via EnDat 2. In a safe drive, the safetyrelated position measuring system is such a subsystem. A safety-related position measuring system consists of: Encoder with EnDat 2.

The EnDat master assumes various monitoring functions with which errors in the encoder and during transmission can be revealed. For example, the two position values are then compared. The EnDat master then makes the data available to the safe control. The control periodically tests the safety-related position measuring system to monitor its correct operation. The architecture of the EnDat 2.

This is possible because the safety-relevant information is saved in the additional information. According to EN , the architecture of the position measuring system is regarded as a single-channel tested system.

Rotary Encoders November PDF

Documentation on the integration of the position measuring system The intended use of position measuring systems places demands on the control, the machine designer, the installation technician, service, etc.

The necessary information is provided in the documentation for the position measuring systems. In order to be able to implement a position measuring system in a safety-related application, a suitable control is required. The control assumes the fundamental task of communicating with the encoder and safely evaluating the encoder data. The requirements for integrating the EnDat master with monitoring functions into the safe control are described in the HEIDEN- HAIN document It contains, for example, specifications on the evaluation and processing of position values and error bits, and on electrical connection and cyclic tests of position measuring systems.

Document describes additional measures that make it possible to use suitable encoders for applications up to SIL 3, PL e, category 4. Machine and plant manufacturers need not attend to these details.

These functions must be provided by the control. Product information sheets, catalogs and mounting instructions provide information to aid the selection of a suitable encoder. The product information sheets and catalogs contain general data on function and application of the encoders as well as specifications and permissible ambient conditions.

The mounting instructions provide detailed information on installing the encoders.

The architecture of the safety system and the diagnostic possibilities of the control may call for further requirements.

For example, the operating instructions of the control must explicitly state whether fault exclusion is required for the loosening of the mechanical connection between the encoder and the drive. The machine designer is obliged to inform the installation technician and service technicians, for example, of the resulting requirements.

Measured-value acquisition Data transmission line Reception of measured values Safe control Interface 1 Position 1 Position 2 EnDat interface protocol and cable EnDat master Interface 2 Two independent position values. Internal monitoring. Protocol formation. Serial data transfer Catalog of measures Position values and error bits via two processor interfaces Monitoring functions Efficiency test For more information on the topic of functional safety, refer to the technical information documents Safety-Related Position Measuring Systems and Safety- Related Control Technology as well as the product information document of the functional safety encoders.

Acceleration Encoders are subject to various types of acceleration during operation and mounting. Vibration The encoders are qualified on a test stand to operate with the acceleration values listed in the Specifications at frequencies from 55 to Hz in accordance with EN However, if the application or poor mounting causes long-lasting resonant vibration, it can limit performance or even damage the encoder.

ROD 426 Rotary Encoder

Comprehensive tests of the entire system are therefore required. Shock On a test stand for non-repetitive semisinusoidal shock, the encoders are qualified for acceleration values and durations listed in the Specifications in accordance with EN This does not include permanent shock loads, which must be tested in the application.

This is the highest permissible acceleration at which the rotor will rotate without damage to the encoder. A sufficient safety factor is to be determined through system tests. Other values for rotary encoders with functional safety are provided in the corresponding product information documents. Humidity The max. Condensation is not permissible. The natural frequency f N should be as high as possible.

Protection against contact EN After encoder installation, all rotating parts must be protected against accidental contact during operation. Protection EN The ingress of contamination can impair proper function of the encoder. The shaft inlet provides protection to IP Splash water should not contain any substances that would have harmful effects on the encoder s parts.

If the protection of the shaft inlet is not sufficient such as when the encoders are mounted vertically , additional labyrinth seals should be provided. Many encoders are also available with protection to class IP 66 for the shaft inlet.

The sealing rings used to seal the shaft are subject to wear due to friction, the amount of which depends on the specific application. Noise emission Running noise can occur during operation, particularly when encoders with integral bearing or multiturn rotary encoders with gears are used. The intensity may vary depending on the mounting situation and the speed.

The storage location should be dry, free of dust, and temperature-regulated. It should also not be subjected to vibrations, mechanical shock or chemical influences. For encoders with integral bearing, every 12 months e. Preventive maintenance is not required. However, they contain components that are subject to wear, depending on the application and manipulation.

These include in particular cables with frequent flexing. Other such components are the bearings of encoders with integral bearing, shaft sealing rings on rotary and angle encoders, and sealing lips on sealed linear encoders.

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