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Smart encoders & actuators
SMRI2
SMRI5
• Magnetic modular encoder with incremental output
• For 2-mm (SMRI2) or 5-mm (SMRI5) pole pitch rings
• Resolutions up to 180,000 PPR
• Ring diameters for shafts up to 250 mm
• IP67 (standard) / IP69K protection rate
• Cable or M12 connector output
Suitable for the following models:
SMRI2-... + MRI/...-2-...
•
SMRI5-... + MRI/...-5-...
•
Lika Electronic
User's guide
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Tel. +39 0445 806600
Table of Contents
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info@lika.biz
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24
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www.lika.biz
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Summary of Contents for Lika SMRI2
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Page 1: Table Of Contents
SMRI2 SMRI5 • Magnetic modular encoder with incremental output • For 2-mm (SMRI2) or 5-mm (SMRI5) pole pitch rings • Resolutions up to 180,000 PPR • Ring diameters for shafts up to 250 mm • IP67 (standard) / IP69K protection rate •... - Page 2 Tous droits réservés. This document and information contained herein are the property of Lika Electronic s.r.l. and shall not be reproduced in whole or in part without prior written approval of Lika Electronic s.r.l. Translation, reproduction and total or partial modification (photostat copies, film and microfilm included and any other means) are forbidden without written authorisation of Lika Electronic s.r.l.
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Page 3: General Contents
General contents User's guide......................................1 General contents.....................................3 Typographic and iconographic conventions........................4 Preliminary information................................5 1 Safety summary............................. 6 1.1 Safety.....................................6 1.2 Electrical safety.................................6 1.3 Mechanical safety..............................7 2 Identification............................8 3 Mechanical installation........................9 3.1 Overall dimensions..............................9 3.2 Sensor and ring combination...........................10 3.3 Mounting instructions............................10 3.4 Mounting the magnetic ring..........................11 3.5 Mounting the sensor............................12 3.6 Mounting tolerances............................14... -
Page 4: Typographic And Iconographic Conventions
Typographic and iconographic conventions In this guide, to make it easier to understand and read the text the following typographic and iconographic conventions are used: parameters are coloured in GREEN; • alarms are coloured in RED; • states are coloured in FUCSIA. •... -
Page 5: Preliminary Information
The ring has alternating magnetic north/south poles that are magnetized at a fixed distance called the pole pitch (see Figure 7). The pole pitch is 2 mm for SMRI2; it is 5 mm for SMRI5. The conversion electronics inside the sensor translates the magnetic fields of the ring into electrical signals equivalent to those of an incremental encoder or a linear scale. -
Page 6: Safety Summary
• elsewhere in this manual violates safety standards of design, manufacture, and intended use of the equipment; Lika Electronic assumes no liability for the customer's failure to comply • with these requirements. 1.2 Electrical safety Turn OFF the power supply before connecting the device;... -
Page 7: Mechanical Safety
SMRI2 • SMRI5 - minimize noise by connecting the cable shield (or the connector housing) and the frame to ground. Make sure that ground is not affected by noise. The connection point to ground can be situated both on the device side and on user’s side. -
Page 8: Identification
Information is listed in the delivery document too. Please always quote the order code and the serial number when reaching Lika Electronic for purchasing spare parts or needing assistance. For any information on the technical characteristics of the product refer to the technical catalogue. -
Page 9: Mechanical Installation
SMRI2 • SMRI5 Mechanical installation WARNING Installation must be carried out by qualified personnel only, with power supply disconnected and mechanical parts compulsorily in stop. 3.1 Overall dimensions (values are expressed in mm) Figure 1 - Encumbrance sizes A Reference sensor “R” (page 21) -
Page 10: Sensor And Ring Combination
SMRI encoder must be compulsorily paired with MRI rings as stated in the previous section. See the order code of the rings: for example MRI/xxx-xx-2-xxx must be paired with SMRI2 encoder. Make sure that the mechanical installation always complies with the system requirements for distance, planarity and parallelism between the readhead and the ring indicated in Figure 4, Figure 5 and Figure 6. -
Page 11: Mounting The Magnetic Ring
SMRI2 • SMRI5 3.4 Mounting the magnetic ring Several types of MRI magnetic rings featuring different mechanical characteristics and mounting options are available. The rings can be fixed to the motor shaft by means of grub screws (Figure 2) or screws (Figure 3). -
Page 12: Mounting The Sensor
SMRI2 • SMRI5 The mark punched in the frame of the ring (see Figure 4) shows the side where the Reference track is coded. It further indicates the point when the Reference signal is transmitted. Please note that the punch mark may be provided also in the rings that do not have the Reference track. - Page 13 SMRI2 • SMRI5 The distance D (see Figure 4) between the bottom of the readhead and the MRI magnetic ring must be as follows: Distance D between sensor / ring Sensor without Reference with Reference 0.1 mm 1.0 mm 0.1 mm ...
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Page 14: Mounting Tolerances
SMRI2 • SMRI5 Figure 5 - Alignment of the readhead / ring 3.6 Mounting tolerances Always comply with the mounting tolerances indicated in Figure 4, Figure 5 and Figure 6. Make sure that the mechanical installation complies with the system requirements concerning distance, planarity and parallelism between the sensor and the ring. -
Page 15: Standard Counting Direction
SMRI2 • SMRI5 3.7 Standard counting direction The positive counting direction (the rising edge of A signal leads the rising edge of B signal) is achieved when the ring turns according to the arrow shown in Figure 4. For further information see the “4.7 Counting direction” section on page 21. -
Page 16: Electrical Connection
SMRI2 • SMRI5 Electrical connection WARNING Electrical connection must be carried out by qualified personnel only, with power supply disconnected and mechanical parts compulsorily in stop. WARNING If wires of unused signals come in contact, irreparable damage could be caused to the device. -
Page 17: M8 Cable Specifications
A = A signal; /A = inverted A signal (or complementary signal). All Lika's magnetic encoders can provide AB0, /AB0 output signals. You are advised to always connect the inverted signals if the receiving device will accept them. Otherwise each output should be insulated singularly. -
Page 18: Connection Of The Shield
SMRI2 • SMRI5 4.4 Connection of the shield For signals transmission always use shielded cables. The cable shielding must be connected properly to the metal ring nut 3 of the connector in order to ensure a good earthing through the frame of the device. To do this disentangle and shorten the shielding 1 and then bend it over the part 2;... -
Page 19: Ab0, /Ab0 Output Channels
(see the “4.8 Reference “R”” section on page 21). In the order code of the encoder you can find information about the interpolation factor. EXAMPLE SMRI2-L-1-1000-N-...: interpolation factor = 1000. MAN SMRI2_SMRI5 E 1.4 Electrical connection 19 of 28... - Page 20 * number of ring poles EXAMPLE As in the previous examples, let's suppose we are using the SMRI2-L-1-1000- N-... encoder paired with the MRI/114-182-2-100 magnetic ring where 182 is the number of ring poles. As you can see in the order code, the interpolation factor is x1000.
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Page 21: Counting Direction
It results from the following formula: pitch of the ring pole / interpolation factor The pole pitch is 2 mm for SMRI2 + MRI/...-2-...; it is 5 mm for SMRI5 + MRI/...- 5-..In our example it will be as follows: 2 / 1000 = 0.002 mm = 2 µm... -
Page 22: Diagnostic Leds (Figure 8)
SMRI2 • SMRI5 NOTE The Reference track can be available only in the magnetic rings having a 10 mm / 0.4” wide magnetic surface. Magnetic rings having a 5 mm / 0.2” wide magnetic surface cannot have the Reference track. -
Page 23: Recommended Circuit
SMRI2 • SMRI5 4.10 Recommended circuit Push-Pull (Y order code) Push-Pull (YC order code) Line Driver (L order code) MAN SMRI2_SMRI5 E 1.4 Electrical connection 23 of 28... -
Page 24: Maintenance And Troubleshooting
SMRI2 • SMRI5 Maintenance and troubleshooting The magnetic measurement system does not need any particular maintenance; please always consider it is a delicate electronic equipment and therefore it must be handled with care. From time to time we recommend the following... - Page 25 SMRI2 • SMRI5 The measuring error is caused by torsion of the machine structure. • Check parallelism and symmetry of machine movement. MAN SMRI2_SMRI5 E 1.4 Maintenance and troubleshooting 25 of 28...
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- Page 28 07.08.2013 First issue 07.11.2013 New web links 30.07.2014 Information about Reference 12.09.2014 Mounting instructions updated, general review General review, SMRI2/SMRI5 manuals merged, 20.12.2018 separate Italian and English versions Lika Electronic Via S. Lorenzo, 25 • 36010 Carrè (VI) • Italy Tel.
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