Magnetic Length Measuring System

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1 SERIE EMIX1 Magnetic Length Measuring System With index pulse Resolution 0.01 mm (at 4 edge triggering) Repeating accuracy +/- 1 increment Small sensor with integrated translator Speed proportional output of the square waves Only functional with an ELGO MB R magnetic tape! EMIX1-000-E_03-06.doc Doku Art. Nr

2 1. INTRODUCTION 3 2. INSTALLATION Active Sensor Area 3 3. FUNCTIONALITY OF THE SAMPLING SENSOR 4 4. CONNECTIONS (D-SUB CONNECTOR) 4 5. TECHNICAL SPECIFICATIONS OF EMIX SAFETY Interference suppressions Place of installation: 6 7. DIMENSIONS 7 8. MAGNETIC TAPE MB R 8 9. TYPE DESIGNATION EMIX LIABILITY EXCLUSION / GUARANTEE 12 2

3 1. Introduction The magnetic linear encoder EMIX1 consist of a small sensor head and an external translator which is located in the 9 pin D-SUB connector housing. Basic data: 1. Resolution : 0.01 mm (at four edge triggering) 2. Power supply : 5 VDC or VDC 3. Output levels : V-HTL or 5V-TTL line driver Please note: To reach the best resolution, the edge multiplier of the follow up circuit should be adjusted to Installation 1) +/- 3 mm 2) < +/- 5 3) < +/- 5 4) < +/- 1,5 Gap max. 0.8 mm Magnetic tape Magnetic tape Magnetic tape Installation place: The installation place must be at least 0.5 m away from inductive and capacitive interference sources as contactors, relays, engines, switch power pack, clocked controllers, etc. The EMIX2 cable must principally be wired separately from heavy duty current wires and a distance to interference sources must be kept. Supply voltage: The supply voltages must be stabilized DC voltages and should not exceed a tolerance of +/- 2.5 % in case of a 5 VDC power supply. Allowed ripple: VDC < 5 % respective 5 VDC < 50 mv. 2.1 Active Sensor Area The active sensor area is shown in the following drawing as a hatched area. These area must be covered completely by the magnetic tape, resp. the sensor should be installed centric onto the tape. active sensor area* 14,5 19,5 Top view magnetic tape Measurements +/- 0,5 mm 3

4 3. Functionality of the sampling sensor Integrated in the sensor head are the magneto-resistor-measuring-bridges as well as the interpolation circuit and the output drivers. The bridge generates the distance dependent count pulses for the signal processing electronic. Note: The distance between sensor and tape must not be larger than 0.8 mm. Every smaller value ( mm) is allowed. 4. Connections (D-SUB connector) 5 V / 5 V-TTL variant - order index V / V-HTL variant only V / 5 V-TTL variant - order index 01 - order index 00 Pin Funktion 1 0 VDC 2 + 5V bzw VDC 3 A 4 B 6 A 7 B Pin Funktion 1 0 VDC VDC 3 A 4 B Z 9 Z 4

5 5. Technical specifications of EMIX1 Specification EMIX1 Sensor Mechanic Unguided Measurement principle Inkremental Translator location External (in D-SUB connector) Outer dimensions of sensor head L x W x H 25 x 10 x 15 mm Resolution at 4 edge multiplier 0.01 Repeat accuracy +/- 1 Increment Accuracy in mm (20 C) +/ x L* * L = Measuring length in meters Distance to the tape max. 0.8 mm Housing material (sensor) Zinc die cast Protection class IP 67 Working temperature C Service temperature C Stock temperature C Humidity max. 80 % not condensing Outputs Push/Pull, short circuit proof Output levels V-HTL oder 5 V-TTL Output currency per channel 20 ma Index pulse Pulse time depends on operating speed DC power supply V +/- 10 % or 5 V +/- 2.5 % Ripple (power supply) max. 5 % at V-HTL resp. < 50 mv at 5 V Consumption 150 ma at V-HTL resp. 200 ma at 5 V Operation speed at V out max. 4 m / s at optimal evaluation (= 100 KHz) Operation speed at 5 V-TTL out max. 4 m / s (= 100 KHz) max. possible measuring length theoretically unlimited Sensor cable Dragchain suitable, 8 wires (twisted pairs) Sensor cable length Standard = 1.5 m (others on request) 5 V / 5 V-TTL = 10 m max. cable length (theoretically) V / V-HTL = 30 m V / 5 V-TTL = 50 m Magnetic tape type (accessories) MB R 5

6 6. Safety Attention! To ensure a perfect function of EMIX1 the following installation guide-lines must be strictly observed and followed. Otherwise the guarantee expires and ELGO Electric GmbH takes no liability and guarantee for malfunctions or damages caused e.g. by incorrect installed wires or other external sources of error or interference, which are exactly explained below. Please read the instructions carefully before putting the controller into operation. As well the company ELGO Electric GmbH is not responsible for possible machine and/or personal injuries, which can result from incorrect material at the measuring system and follow-up electronics. The machine manufacturer is obligated to accomplish safety-relevant measures 6.1 Interference suppressions The screen of the signal cables should be connected only on one side with follow-up circuits. The signal output cable is to be laid in principle separately from load current lines and a distance from at least 0.5 m to inductive and capacitive interference sources like contactors, relays, engines, switch power packs, clocked automatic controllers etc. must be kept. If disturbances should arise despite adherence to all points described above, must be proceeded as follows: Attach from RC elements over contactor coils of AC contactors (e.g. 0,1 µf / 100 Ω). Attach recovery diodes over DC inductances. Attach from RC elements over the individual engine phases and over the brake (in the terminal box of the engine). 6.2 Place of installation: Principle install EMIX1 separately from load current lines. A distance from at least 0.5 m to inductive and capacitive interference sources like contactors, relays, engines, switch power packs, clocked automatic controllers etc. must be kept. Lay the EMIX1-cable separately from load current lines and keep distance to interference sources. When assembling in the proximity of foreign magnets a minimum distance from 100 mm is necessary to the magnetic tape. 6

7 7. Dimensions Sensor head: Width = 10 mm Bottom side X = active sensor area max 0.8 mm Connector with integrated translator circuit: 56, ,5 36 7

8 8. Magnetic Tape MB R Construction of the magnetic tape wit 3 components In the standard case the magnetic tape is delivered as described here. The tape must be bonded on the mounting surface. C Magnetic permeable cover band for protection (unnecessary for measurement) Scanning side A Magnetized plastic tape (Magnetic tape) B Magnetic conductive steel band (makes a magnetic short circuit) Installation surface, e.g. machine bed Thickness: A + B + C = 1.8 mm Available lengths: See technical specifications The Magnetic tape consists of 3 components: A The magnetized, highly flexible plastic tape, connected on the lower side with: B Magnetic conductable and flexible stainless steel tape. It protects the plastic tape from mechanical damages and is a magnetic short circuit at the same time. This increases significantly the functional security under extreme magnetic influences. Both parts A and B are already factory-bonded (by ELGO). Alternatively the single components can be ordered separately (see type designation). C To keep the flexibility for transport and installation, the third part a stainless, magnetic permeable steel tape is delivered separately. It serves for mechanical protection of the plastic tape, is already equipped with a sticky tape and must be bonded on the magnetic plastic tape after installation. 8

9 Processing hint for the sticking of magnetic tapes Materials to stick: The provided sticky tapes stick well on clean, dry and plain surfaces. Typical solvent for cleaning surfaces are a 50/50 mixed isopropyl-alcohol / water mixture or heptane. (Important: Please observe carefully the caution hints of the producer when using the solvent.) The surfaces of materials as copper, brass etc. should be sealed to avoid an oxidation. Proof: The stability of the adhesion is directly depending on the contact, which the adhesive develops to the surfaces stuck together. A high proof results in a good surface contact. Sticking temperature: The optimal sticking temperature is between + 21 C and 38 C. Avoid colder sticking surfaces than + 10 C, because in this case the adhesive becomes to hard and perhaps a sufficient immediate adhesion is hardly to achieve. After proper sticking the stability of the connection is ensured also when the temperature is below zero. The final tackiness of a sticking is from experience reached after approximately 72 hours (at + 21 C). Note for storage: In order to avoid tensions in the tape, it should be stored in stretched or rolled up condition - with the magnetized plastic tape resp. scanning side outward (see image). Resistance against chemical influences Chemicals, showing no or only small effects: - formic acid - glycerol 93 C - linseed oil - soy beans oil - cotton seed oil - N-hexane - lactic acid - formaldehyde 40% - iso octane - petroleum Chemicals, showing small to medium effects: - acetone - gasoline - acetic acid 30% - Olein acid - acetylene - steam - acetic acid, pure acetic acid - sea water - ammonia - acetic acid 20% - isopropyl ether - stearic acid 70 C - anhydrous - kerosene Chemicals, showing strong effects: - benzene - nitric acid 70% - nitrobenzene - lacquer solvent - turpentine - nitric acid, red, vitriolic - carbon tetrachloride - trichloroethane - tetrahydrofuran - xylene - hydrochloric acid 37%, 93 C 9

Technical specifications of the tape Working temperature range 0... + 70 C Operating temperature range - 20... + 85 C Stock temperature range - 40... + 95 C Operation height max.

10 Technical specifications of the tape Working temperature range C Operating temperature range C Stock temperature range C Operation height max m above sea level Humidity max 80 % (not condensing) Linear extension (relative) L L = L x α x ϑ (L = Measuring length in meters) ( ϑ = relative change of temperature in K, based on 20 C room temperature) Coefficient of extension α 16 x /K Bending radius minimum 150 mm Protection class IP67 Width 10 mm +/- 0.2 mm Thickness 1.8 mm +/- 0.1 mm (incl. cover band) max. possible length Standard roll 32 m (up to 70 m on request) Pole length 2 mm Influence of external magnets External magnetic fields must not exceed 64 mt (640 Oe; 52kA/m) at the surface of the magnetic tape. Higher values will damage or destroy the magnetic tape code. Magnetic fields > 1 mt at the measuring system has negative influences on the system s accuracy. Determination of pole length on already installed tapes: Incremental tape (2mm pole length) A special pole foil (app. 4 cm x 4 cm) is available as accessories and is useful to make the tape magnetization visible. The pole length can be determined, in order to replace an already installed or unknown tape correctly. The pole foil can be ordered by using the following Article Number:

11 9. Type designation EMIX1 EMIX X XXXX Series EMIX1 = small sensor head, external translator Version No. 000 = Standard 001 = first special variant ect. Sensor cable length (meters) Standard = 1.5 m (others on request) Resolution 2 = 0,01 mm Power supply / Output levels 00 = V / V 01 = V / TTL - line driver 11 = 5 V / TTL - line driver Options V = sealed version IP 67 R = integrated 120 Ω resistors Magnetic tape (accessories) MB R- XX.X ELGO Magnetic tape Pole distance 2.0 mm Width 10 mm Number of magnetic tracks 1 = Single track system Tape construction R = Standard Tape length Please indicate the desired Length in XX.X Meters 11

12 10. Liability exclusion / Guarantee We have checked the contents of this instruction manual carefully, to the best of our knowledge and belief for conformity with the described hardware and software. Nevertheless errors, mistakes or deviations can not be excluded, therefore we do not guarantee complete conformity. Necessary corrections will be included in the subsequent editions. We appreciate your ideas and improvement suggestions very much. Reprint, duplication and translation, even in extracts, are only allowed with a written authorization by the company ELGO Electric GmbH. We constantly strive for improving our products, therefore we keep all rights reserved for any technical modifications without any notice. ELGO Electric does not assume any liability for possible errors or mistakes. The guarantee period is one calendar year from the date of delivery and includes the delivered unit with all components. ELGO Electric GmbH will at its option replace or repair without charge defects at the unit or the included parts, verifiable caused by faulty manufacturing and/or material in spite of proper handling and compliance to the instruction manual. Damages verifiably not caused by ELGO Electric GmbH and due to improper handling are excluded from any guarantee e.g. by applying faulty voltage, diffusion of liquid into the interior of the engine, using force, scratching the surface, chemical influences etc.! Subject to modifications - ELGO Electric GmbH

Magnetic, Incremental - Length Measuring System. Only functional with an ELGO MB R magnetic tape!

GMIX1A Series Magnetic, Incremental - Length Measuring System 5 different adjustable resolutions between 0.1 and 0.01 mm s (at 4 edge triggering) repeat accuracy +/- 1 increment 5V-TTL or 10...30 V Push/Pull