Germany
Manufacturer/ Producer
Germany
Finger Joystick Series TRY22 Industrial joystick for three axes of the highest quality in terms of mechanics, materials and workmanship Exceptional quality of mechanics and sensors For demanding applications Contact-less, wear-free Hall Effect technology Redundant outputs available Protection available up to IP65 (above panel) The TRY22 series was developed strictly following criteria such as cost efficiency, high quality level, high IP classes und easy installation.
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The medium-sized hand joysticks of the 870 series with stock grip handle were specially developed for the multi-axis control of machines in demanding applications with highest requirements on quality and feel. The joysticks are a guarantee for success in demanding applications with up to three axes, where quality, durability and reliability are paramount. The precision manufacturing of the joystick results in a particularly high-quality feel that conveys a safe operating feeling and enables the user to precisely control movements in several dimensions. Thanks to the non-contact Hall effect technology and the optional double outputs, the joysticks are extremely reliable and safe to use even in the toughest conditions. The joystick is electrically connected via a 12-pin connector, which enables easy installation. The installation depth of <49 mm is particularly advantageous when space is limited.
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The potentiometers of the series 46 are used as multiturn sensors or manual adjusters, with outstanding linearity and resolution for measuring ranges from 3 to 30 turns. The optionally integrable limit switches can be factory-configured within the electrically effective angle of rotation or within the signal plateau. Potentiometer with many options. Multiturn 3…20 turns (30 turns on request) Power rating up to 10 W Single-wire versions have nearly infinite resolution
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The thumb joysticks of the TRY14 series cover a great variety of different applications due to their high number of configuration options The TRY14 is the all-rounder in the field of thumb joysticks because of the extensive selection of handles, limiters and output options. The size of these joysticks can be compared with the ones that are widely used in gamepads, but the TRY14 is integrated into an industrial-suited housing with a reliable mechanism. Typical applications range from remote controls, arm rest integration or integration into larger joystick handles to industrial or medical robot arms.
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HTx36E ‐ Hall encoder with battery- and gear-less true-power-on technology, up to 43 bit resolution, CAN-bus or incremental output, solid or hollow shaft Absolute rotary encoder: — Only digital signal outputs, CANopen, CAN SAE J1939, SSI — Patented battery and gear-less true-power-on multiturn technology — Singleturn resolution up to 16 Bit — Multiturn resolution up to 43 Bit — Patented technology for system accuracy < 0.35° (singleturn) Incremental rotary encoder: — From 1 to 16384 ppr in 1 incremental stepwidth order-able ex works — Optional user-parameterizable index pulse (Z) position
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The displacement sensors of series SPR18 are used in industrial applications, which require a compact linear transducer with spring-suspended probe tip, long lifespan, high accuracy, rear and front guided push rod with measuring length from 25 to 100 mm. The compact and robust linear potentiometers of the series SPR18 are designed for industrial applications. The housing profile made of anodized aluminium corresponds to the usual industrial dimension with 18x18 mm. The transducer has a stainless steel ball in the probe tip, for example for scanning profiles or for monitoring distances. In the displacement sensor series SPR18, the mechanical detection of linear movement is done by a rear and front guided push rod.
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ETx25F encoders are used for reliable angle measurement with a hardened and tempered sleeve bearing made of metal: as singleturn variant (360°) with analogue, PWM, incremental, SER or SPI output or as multiturn variant (up to 72000°) with analogue output. ETx25F can be used up to medium environmental requirements (from shaft side max. IP55M/IP66S). Singleturn electronics: ETA25F absolute encoder (ETA25F X redundant version): Provides an absolute analogue signal with 12 bit resolution. ETP25F absolute analogue encoder: PWM output. ETI25F incremental encoder: With up to 1024 pulses / per revolution and availability of following output signals: TTL, Push-Pull or Open Collector. ETS25F absolute encoder with digital output: 12 bits resolution with SER interface and in 14 bits resolution with SPI interface. Multiturn electronics: ETP25F PM multiturn encoder with analogue output, direct programmable on site: The ETA25F PM measures angles from 0…10° up to 0...72000° (absolute).
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High-quality haptics for one-dimensional control tasks The proportional rockers of the PW30 series meet the highest demands on quality and reliability for long-term use in industrial environments. With the look of a rocker switch but the sensor technology of industrial joysticks, the PW30 series combines the advantages of joysticks (for transmitting an analogue control variable) with those of toggle switches (flat design, low space requirement). In addition to two different rocker shapes, choices between potentiometric or Hall-effect sensor technology, as well as between spring return to the centre position or to the end position, are possible. Redundant versions are also available on request.
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The programmable multiturn sensor ETA25PM can be parameterized by the customer on site to the desired angular measuring range and sense of rotation up to 10,000 times. Only one device for different angles of rotation, sense of rotations direct parametrizable on site. These advantages enable the user the possibilities to set up the ETA25PM multiturn encoder to the requirements of the application on site. Only one angle encoder device for different requirements is needed, which can be parameterized almost as often as required. The ETA25PM measures angles from 0…10° up to 0…72000° (absolute). The ETA25PM is available until protection class IP66 and has a long durability of more than 100 million shaft revolutions. The compact sensor in the 25 mm housing with Ø6 mm or Ø6.35 mm shaft diameter is e.g. optimally suited for use in drive units as position feedback. A variant of the ETA25PM with integrated buttons for angle programming and sense of rotation is available on request.
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Unbeatable small installation depth and the highest stability in its class. The joysticks of the series 844 exhibit properties, which are normally found in heavy-duty products only, even though it is a very compact finger joystick. For example, with handle "T" the 844 becomes the most compact stock grip joystick with push button (see picture above in the center). In this configuration, the 844 has the advantage over larger models of lower price and space requirements. The joysticks of the series 844 are equipped with wear-less Hall Effect sensors, are available with up to 3 axes, and exhibit a robust mechanical construction, with a ball-socket pivot. It withstands high push, pull, translational and rotational forces, up to a load of 400 N (vertically). The operational lifetime is up to 10 million operations. With protection up to IP65, a variety of handle shapes, limiters and output options, the optimum product can be selected for the application.
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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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