Germany
Manufacturer/ Producer
Germany
Unique: The TRY20 offers 3 axes and is still a compact thumb joystick The joysticks of the TRY20 series are unique in their class thanks to their rotatable knob, which, as a z-axis, offers an additional third, proportional degree of freedom for controlling the application. The industrial joysticks achieve the highest level of quality in terms of mechanics, materials and workmanship. The high-quality haptics convey a secure operating feeling and enable the user to precisely control movements in several dimensions. Double (redundant) outputs are optionally available, which enable use in safety-critical applications. Variants with protection class IP40 (hardcover) and sealed variants (rubber bellows) with protection class IP54 are available. If the z-axis (the rotatable knob) is not required, the 2-axis version with protection class IP65 can be implemented as a special version.
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The adaptability of the sensors in the premium joystick series 826 is unequalled in the field of joysticks The joystick series 826 fulfils the highest demands on quality. It shows its strengths at challenging applications with up to 2 axes, where no compromises are made when it comes to endurance and reliability, and the application asks for special sensor configurations. Die configuration options of the series 826 are unique: both axes exhibit a separated shaft for the sensors, so that the sensors, micro switches and return mechanism (spring return/friction clutch) can be adjusted individually. Especially for safety critical applications, this series is often the only series that offers the necessary options to fulfil the requirements.
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The series MM10 without spring return / MMR10 with spring return is used in applications with very confined space, which require a miniaturized displacement sensor with long lifespan, high accuracy and guided push rod on both sides. The linear potentiometers of the series MM10 / MMR10 are especially space-saving designed and therefore very suitable for applications with very confined space. The potentiometric distance measurement is carried out with a high-resolution conductive plastic resistive element. Thanks to this Comolded conductive plastic technology and the high-quality sleeve bearings, the compact displacement encoder has a very long lifetime and high accuracy due to its good linearity. In the displacement sensor series MM(R)10 the mechanical detection of linear movement is done by a rear and front guided push rod. The displacement sensor can be used both as a probe and with a guided push rod. The internal or external spring return opens up additional applications.
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The compact MRX50 panel encoders with 50 ppr. prove their precision and quality even after many hundreds of thousands of operations and are customizable on request The panel encoder MRX50 is, in the sum of its characteristics, out of competition. This product design with this fine-stepped 50 detents and push button even under increased environmental requirements (IP65) cannot be found a second time. The robust and precise panel encoder ensures, even after many hundreds of thousands of operations, the largely unchanged quality of its haptic properties, such as the detent and the shaft play. This was confirmed to us by customers who have undergone this sensor comprehensive testing and have opted for the MRX50. This makes the manual 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 hollow shaft potentiometers of the MHP24 series are suitable for applications where easy mounting in a limited space and a stable output signal are required. Thanks to the flat hollow-shaft and the anti-rotation protection pin; the MHP24 conductive plastic potentiometer offers not only easy installation but also the simultaneous alignment of the zero point. The very compact design means that it can be easily used in very compact spaces. Space-saving flat housing (Ø24 x 7.1 mm) Simple mounting on flatted hollow shaft hub and anti rotation pin Conductive plastic and high-quality multi finger wiper (precious metals) gives a reliable signal output
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Multiturn-Wirewound Potentiometer SMT The Smallest 10-turn potentiometer in the world Only Ø10.5 mm 5 or 10 turn versions The SMT potentiometers in 10,5 mm housing are suitable for applications where a miniaturized and precise multiturn potentiometer is important. The precision potentiometers of the series SMT are the smallest multiturn wirewound potentiometers in the world. The potentiometer is as a 5 or 10 turn version and optionally with rear shaft available. A potentiometer with many options. Smallest 10-turn potentiometer in the world Only Ø10.5 mm 5 or 10 turn version Robust metal housing Options: Front shaft adjustment Rear shaft and shaft geometry Screwdriver slot Improved linearity Improved resistance tolerance
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The all-round panel encoder for high radial and axial forces with or without detents/push button at an attractive price level The MRS panel encoders are the most compact manual setpoint devices in the MEGATRON portfolio, with an attractive price level. It is a true all-rounder because of its variety of variants, its solid mechanical construction, and its finely tuned selection of components. Quality at a low price hasn't to be a contradiction. This is reflected in its lifespan of 1 million revolutions and an optional shaft seal with IP65 protection. Particularly noteworthy are the high radial and axial forces with which the panel encoder can be operated. The MRS series has been successfully represented on the market for many years. It has proven its worth, and is used in many applications.
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Thanks to the broadest selection of actuation haptics, the panel encoder can be optimally adapted to the application. The MRB panel encoders are used as manual setpoint devices. Thanks to their's low power consumption, the panel encoder are also suitable for battery-powered applications. Particularly noteworthy is the diverse selection of detent torques and push-button operating forces. Its electrical connection options are also impressive. This variety allows the combination of a great number of operation knobs. For example, an actuating knob with a small diameter in combination with a high detent torque can ensure that the setpoint can only be changed via a higher actuating force. This structure prevents unintentional changes to the pre-set values, for example.
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The HH17/19 potentiometers in Ø22 mm housing are suitable for applications where a long lifespan and very high-resolution multiturn potentiometer is important. The high-resolution precision potentiometers of the HH17/19 series have a wire-wound resistor element, which is finished with a conductive plastic layer. Thus, the so-called winding jumps are omitted and the resolution is almost infinite. Due to the smooth surface of the resistance element, the hybrid potentiometer has a significantly longer life and qualifies it as a position feedback in closed loop control circuits. The shaft diameters is Ø6,35 / Ø6.00 mm (HH17 / HH19) and is equipped with a screwdriver slot. In addition, an optional integrated slipping clutch protects the potentiometer from damage by overrunning the end stops and facilitates the zero point adjustment. The potentiometer is available in a 3, 5 or 10 turn version.
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Reliable switching with spring return mechanism thanks to the 851 joystick with good price/performance ratio The series 851 switch sticks feature a functional but space-saving design. The optimized mechanics, including a stainless steel metal shaft, combined with micro switches allow for reliable switching for currents up to 10 A and voltages up to 240 V, while only taking less than 24 mm space below the panel. The spring return mechanism guarantees for safe control of the application. A cross- and one-dimensional limiter are both supplied with the shipment. The protection is IP65 above the panel. On request, switches with gold-plated contacts are available for corrosive surroundings.
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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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From here onwards, we are only concerned with the linear characteristics (linearity). Relationships must be suitably adapted for applications with non-linear characteristics (conformity) but there are no essential differences. As already mentioned in Section 2, the required linearity values can only be utilized so long as the signal output by the sensor "potentiometer" carries no current. We have now to consider the effect of wiper current on linearity. Fig. 10a illustrates the functional relationship between wiper current, contact resistance and linearity error. As is shown by the example in Fig. 10b (Characteristic 4), with a wiper current of 10 µA and a contact resistance of 10 kOhm, a potentiometer which has a resistance of 2 kOhm already has linearity error of 1.1 %. A similar situation arises with an ohmic load. This clearly shows how important are the roles played by both wiper current and contact resistance. Fig. 10a Fig. 10b
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