Germany
Manufacturer/ Producer
Germany
Despite the small size of 13x22mm (DxL) the MOT13 incremental encoder allows high resolution up to 16000 pulses per revolution. It is especially suitable for use with low space requirement. Typical applications are medical robots, medical equipment and special robots. Ø13 mm housing 100…16000 ppr 2 channels and index TTL, open collector or line driver output Supply voltage 5 V Ball bearings Also, with hollow shaft Size: 13x20mm (Housing D x L) 1,5 x 10 mm (Shaft D x L) Mass: 10g
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The FHx58 family is ideally suited for use in the food industry, pharmaceuticals and offshore applications. Encoders are available in two sensor technologies: Optoelectronic: incremental encoder (FHI58) 3D Hall: absolute encoder (FHB58 & FHS58) The high-class mechanical encoder design is independent of the installed sensor technology. High-quality ball bearings allow shaft loads up to 100 N. The dead-space-free sealing and bearings elements guarantee a wobble free shaft operation and ensures that no impurities can infiltrate. The FHx58 can be cleaned with high pressure and steam jets (IP67/P69k). The stainless steel encoder body which is specially surface-treated in combination with PTFE, TPE sealing elements allow that the FHx58 can be used in applications with high hygienic standards. Precisely it is this design which allows to operate the FHx58 also in salty atmospheres permanently or to clean the encoder with cleaning-fluids containing acids and chemicals.
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The MUP potentiometers in 22 mm housing are suitable for applications in which a compact sensor with good quality and reasonable price is important. The precision potentiometers of the series MUP are space-saving, economical and universal wirewound potentiometers. Models with electrical rotation angle of 320° (MUP1300 / 1350) and 270° (MUP1307) are available.
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The potentiometric displacement sensor series MBX is excellently suited for very limited installation space due to its extremely flat design with an overall height of only 7 mm. In addition, the universal cursor can be coupled mechanically in a flexible manner, so that no push rod is required, thus saving space in the customer's housing. With its open design, the displacement encoder is designed for installation in a customer housing.
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HTx36 encoder - robust, ball bearing, sealed, with solid or hollow shaft. The encoders of the HTx36 series are specially designed for use between simple applications and heavy-duty applications. The contactless encoders in the Ø36 mm metal housing can be precisely matched to the respective area of application thanks to their numerous electronic and mechanical options. Absolute encoder: — Single- or multiturn — Analogue: Voltage/current output, PWM - 12 bit — Digital: SSI, SSI+UVW up to 16 pole pairs, SER, SPI - up to 14 bit — Also redundant Incremental encoder: — A, B, Z also differential A, A/, B, B/, Z, Z/ — OC, TTL, PP signal outputs — Free selection of the number of pulses - up to 1024 ppr. — UVW signals for motor commutation of DC motors up to 16 pole pairs
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Panel encoder MRX25 with 25 pulses and push button are suitable for individual detent torques according to customer requirements The panel encoders MRX25 stand for the unique combination of 25 ppr. and IP65. The high quality of the series was confirmed by our customers, who subjected the encoder to extensive testing before adopting the manual encoder in their application. The result of the tests was consistently the same: even after many hundreds of thousands of operations, the haptic properties, such as the detent torque and the shaft play, have changed only insignificantly. The electrical values could be received precisely at the output of the sensor as on the first day. This makes the panel encoder the first choice when special emphasis is placed on longevity with consistent quality. MEGATRON customizes the panel encoders on customer request.
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The MCP40 potentiometers with precision ball bearings and servo flange are suitable for applications where a very long life with very high linearity and precisely mountable sensor is important. The precision potentiometers of the MCP40 series are designed for high demands on accuracy and reliability. They have outstanding linearity and excellent life expectancy. The sensor is available in a high-resistance version for power-saving requirements. The potentiometer is equipped with a servo flange for precise mounting. In closed loop controlled systems, the conductive plastic potentiometers can be used particularly advantageously. As passive components, they do not cause any dead times due to immediate signal availability, and the signal is continuous without steps available. Very long life Very precise sensor Servo flange for precise mounting 2 Precision ball bearings Robust metal housing Power saving in applications
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The MCP30 potentiometers with precision ball bearings and servo flange are suitable for applications where a very long life with high linearity and precisely mountable sensor is important. The precision potentiometers of the MCP30 series are designed for high demands on accuracy and reliability. They have good linearity and excellent life expectancy. The potentiometer is equipped with a servo flange for precise mounting. In closed loop controlled systems, the conductive plastic potentiometers can be used particularly advantageously. As passive components, they do not cause any dead times due to signal propagation and the signal is infinitely available. Very long life Very precise sensor Servo flange for precise mounting 2 Precision ball bearings Robust metal housing
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Optical Kit-Encoder SPEH - Very flat optical hollow shaft kit encoder with speeds up to 60,000 rpm and up to 1000 ppr. Flat design 11 mm Up to 60,000 rpm Limit frequency 100 kHz Up to 1000 pulses per revolution Kit design Option through-hole in cover This very flat optical incremental encoder with only 11 mm height and limit frequency of 100 kHz uses the bearing of the application. The encoder is completely wear-free. In addition this allows measurements at speeds up to 60.000 rpm. Interfaces are TTL or Line Driver for longer transmission distances. Through holes for the cover are available as an option for through shafts. In addition, the ready-made Molex plug-in connection enables convenient mounting.
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The compact displacement sensors of series RC13 are used in applications with harsh environmental conditions, which require a robust linear transducer with long lifetime, high accuracy and a guided push rod with measuring lengths from 25 to 250 mm. The compact linear potentiometers of the series RC13 are designed for applications with harsh environmental conditions. For mechanical coupling, the displacement sensors are available in three mounting versions: mounting brackets, ball joints or flange. The variant with ball joints compensates movements transversely to the push rod, so that non-linear movements can also be coupled simply and without stress. The mechanical detection of linear movement is done by a front guided push rod.
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Hermann-Oberth-Straße 7
85640 Putzbrunn - Germany
Germany
If, in a highly sensitive control system, the amplification should, for example, be so arranged that the control circuit will be stable with the mean slope (gradient) of the sensor, then it is important to be aware of any variations there may be in that slope (Fig. 12a, Fig. 12b). If, at any point, the gradient is appreciably steeper than the mean gradient, then there will be a higher closed-loop gain in this position and this could lead to feedback oscillation. If, on the other hand, the gradient is less steep at some point than the mean gradient, then repeatability would be reduced and there would be less control accuracy. If we relate this type of local gradient variation gl to the mean gradient go of the potentiometer, then this criterion is independent of the potentiometer length and can be used for the direct comparision of various potentiometers.
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Smoothness is a measure of the deviations from perfect regularity that appear in the output voltage of a potentiometer. This irregularity is measured over a specified travel increment, for example 1 %, and is expressed as a percentage of the applied voltage. For the measurement of smoothness, the VRCI definition calls for a bandpass filter to be used as a means of suppressing any linearity error and for the potentiometer to be operated with a load resistance (e.g. 100 . Rp). This method has certain disadvantages: a) The use of a filter causes both the absolute wiper velocity and any changes in such velocity to affect the smoothness values. Since the filter partly integrates and partly differntiates, the chart-recorded smoothness curve does not accurately indicate the variations in the output signal. b) The load applied to the potentiometer also contributes to error by causing variation in the contact resistance which is greatest with the wiper at the voltage application end and...
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When, some 60 years ago conductive plastic potentiometers were first introduced onto the market, it was apparent that although the winding jumps which were a feature of wire-wound potentiometers had been overcome, absolute smoothness of the output voltage could not be achieved. Following some basic reserach by. h. Wormser 4, 5, 6 , the term "smoothness" was included in the standard issued by the Variable Resistive Compontents Institute (VRCI). Although this definition was adequate at that time it cannot serve as a system definition for many applications. This is because it is now possible to produce potentiometers with appreciably better smoothness and linearity values. For this reason, Novotechnik has sought over the past years to develop definitions better suited to the current state fo the art. The various methods used are discussed and evalutated below.
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If there is axial misalignment (eccentricity) between the drive shaft and the shaft of a potentiometer used to sense angular, motion, this will cause a linearity error that increases as the coupling radius decreases in relation to the degree of eccentricity. The following equation determines the maximum relative error Fmax = E/Pi · rk where E = Eccentricity und rk = the coupling radius. It is only possible to take full advantage of the linearity or conformity of any rotationary sensor system, if coupling alignment errors (offset and angular misalignment) are avoided or at least reduced to a mimimum. This means that with highly accurate measurement systems, due allowance must be made for any coupling misalingment in accordance with the above equation.
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