LINEPULS & LINECOD catalogue 2016 in English

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LINEPULS • LINECOD Technical information www.lika.biz The magnetic tape is the carrier of the incremental and absolute encoded position information. Magnetic tape It is primarily made up of a bonded ferrite material where the datum position is coded. During the encoding process, the sensitive material is magnetized to obtain either a systematic sequence of North-South poles with alternating magnetic field having the same pole pitch dimension (incremental version) or a coded sequence of North-South poles generating an absolute pattern (absolute version). Sometimes the absolute encoders are paired with a double-track magnetic tape encompassing both the absolute pattern and an incremental poles track for speed feedback. The bonded ferrite layer is mounted on a ferromagnetic stainless steel strip in order to be self-supporting, have both robustness and flexibility and shield the encoded material from the magnetic fields that may influence from the bottom. A cover strip in stainless steel can be supplied on request to be stuck on the sensitive surface and protect it from scratching and contaminants (see the magnetic tape's order code). The tape can be easily applied/removed via a self-adhesive backing (liner) pre-applied under the stainless steel strip. The tape is insensitive to light, dust, fingerprints, moisture, oil, grease, water, many chemical agents; thus it can be mounted in the most aggressive industrial environments. In specific encoders that require the sensing head to be guided by a track profile (see the SMIG and SMAG series), the magnetic tape is inserted in an aluminium track section. On demand the measurement tape can be protected using an aluminium profile (order code PS1-x). Furthermore it can be fitted with plastic terminals to protect the ends and prevent them from peeling off (order codes KIT LKM-1439 and KIT LKM-1440). For availability and additional information see the section “Accessories” on page 119. For specific applications Lika Electronic is able to provide incremental modular encoders for toothed-wheels and racks. In such measurement systems a ferromagnetic toothed structure is used as a passive measurement scape instead of the active measurement tape with magnetized poles described above. For more information about such applications see on page 23. Passive scale 11
LINEPULS • LINECOD Technical information There are two types of magnetic tapes for incremental encoders: MTx tapes and MTSx tapes. MT tapes are 10 mm wide while MTS tapes are 5 mm wide. As in an incremental measuring system the tape has a systematic sequence of North and South poles recurring indefinitely, there is virtually no limit to its measuring length (see on page 14). Standard incremental tapes up to 100 m long can be supplied, they can be cut to length accorwding to application requirements. You are required to indicate the desired size under the option LENGTH in the order code. Tape dimensions The magnetic tapes for absolute encoders, MTAx type tapes, are 10 or 20 mm wide, according to models. An absolute tape encompasses a coded sequence of North-South poles generating a pseudo-random absolute pattern, so there is a limit to the number of information it can provide as well as to its overall length. The max. measuring length of the absolute encoders is indicated in the datasheet under the section “Mechanical specifications”. Unless otherwise indicated, any absolute tape section shorter than the max. measuring length can be supplied on request. When you need to order the tape please calculate its length as follows: length of the travel to be measured + length of the sensing head + two safety sections at both ends each one being min. 1-pole pitch long + additionally 1 cm at both ends if you mount the optional tape terminals. The magnetic sensors (MR magneto-resistive sensors or Hall sensors) are located inside the readhead and designed to translate the information from the magnetic field generated by the North-South poles of the tape into an electrical signal. In an incremental encoder the magnetic sine waves are converted into two separate sinecosine signals phase-shifted by 90 electrical degrees. While in an absolute encoder the sequence of coded poles is converted into an absolute serial signal. The signals are processed and optimized by the converting circuitry before being output. The sensing elements are designed and arranged in order to minimize the effects of the external static magnetic fields. The converting circuitry (otherwise referred to as translation circuitry) is designed to collect the signals from the magnetic sensor and convert them into standard output signals. Signal conditioning processes allow to obtain signals that are optimized for the subsequent controller and the different environmental conditions. Using interpolation techniques further allows to interpolate the signals, that is to convert the signals to a higher sampling rate (upsampling). In this way it is possible to provide enhanced measuring resolutions to output. The converter can provide the following output signals or information to the subsequent controller: • square wave signals phase-shifted by 90 electrical degrees; • sine-cosine signals phase-shifted by 90 electrical degrees; • absolute information via serial SSI and BiSS interfaces; • absolute information via fieldbus interfaces; • current and voltage analogue signals. Magnetic sensors Converting circuitry 12
Page 1: Smart encoders & actuators Incremen
Page 4 and 5: An international family company, co
Page 6 and 7: Quality policies at Lika Electronic
Page 8 and 9: LINEPULS • LINECOD Technical info
Page 24 and 25: LINEPULS Output signals Most increm
Page 26 and 27: LINEPULS Output signals SMEx1 linea
Page 28 and 29: LINEPULS Output signals SMI2 Resolu
Page 30 and 31: LINEPULS Output circuits Differenti
Page 32 and 33: LINEPULS LINECOD Cable lenght We hi
Page 34 and 35: LINECOD Output codes The absolute e
Page 36 and 37: LINECOD Absolute output circuits an
Page 38 and 39: LINECOD Absolute output circuits an
Page 40 and 41: LINECOD Additional functions for SS
Page 42 and 43: LINECOD Additional functions for an
Page 44 and 45: LINECOD Output circuits and fieldbu
Page 46 and 47: POSICONTROL IF55 converter series I
Page 48 and 49: LINECOD Output circuits and fieldbu
Page 50 and 51: Index Overview catalogue page 52 LI
Page 52 and 53: LINEPULS • LINECOD incremental &
Page 54 and 55: ROTAPULS • ROTACOD bearingless en
Page 56 and 57: ROTACOD absolute encoders for gener
Page 58 and 59: ROTACOD absolute encoders with fiel
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ROTAPULS • ROTACOD encoders with
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ROTAPULS • ROTACOD specialty enco
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DRIVECOD rotary actuators for forma
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POSICONTROL interfaces, gateways &
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www.lika.biz MT MTS Order code MT50
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www.lika.biz SME51 LKM-1309/5 MT50
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www.lika.biz SME52 LKM-1309/5 • L
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www.lika.biz SMS11 • SMS21 LKM-13
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www.lika.biz SMS12 LKM-1309/1 • L
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www.lika.biz SMB2 • SMB5 MT20 •
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www.lika.biz SMI2 • SMI5 MT20 •
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www.lika.biz SMSR MT10 Order code -
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www.lika.biz SMG Toothed-structure
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www.lika.biz SMX2 • SMX5 MT50 •
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www.lika.biz SMK MT50 Order code -
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www.lika.biz SML • SMH MT32 • M
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www.lika.biz SMIG • MTIG Order co
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www.lika.biz SMP MT50 Order code -
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www.lika.biz Series L1 L2 Tape term
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www.lika.biz SMA2 MTA2 Order code -
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www.lika.biz Series L H SMAG - CB s
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www.lika.biz SMAX • SMAZ MTAX •
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LINEPULS • LINECOD Absolute linea
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LINEPULS • LINECOD Accessories Pi
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Notes 121
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Lika Electronic Srl Via S. Lorenzo,
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LINEPULS & LINECOD catalogue 2016 in English

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