Miniature LM Guide Actuators Featuring Caged Ball Technology

Miniature LM Guide Actuators Featuring Caged all Technology Caged all Technology Offers Long life and long-term, maintenance-free operation Excellent high speed performance Excellent Sliding Smooth Motion Capability SKR/ TOKYO. JAPAN CATALOG No.-E Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

T e Inner block QZ Lubricator all screw shaft Outer rail Caged ball alls Fig.1 Construction of SKR-type LM Guide Actuator with Caged all Technology Construction and Features The SKR-type LM guide actuator with Caged all Technology is a compact actuator that places an inner block(s) with integrated LM block and ball screw nut onto the inside of the U-shaped outer rail. Caged ball technology in the LM guide sections and QZ lubricator in the ball screw sections are integrated in the design. The SKR/-type LM guide actuator assures excellent sliding, higher speed, longer maintenance-free operation and other features in comparison with the conventional KR-type. The inner block, outer rail, ball screw shaft (excluding normal and high-accuracy grades -mm leads), and balls are made of stainless steels. 1. Four-way Equal Loading Capacity Each row of balls is arranged at a contact angle of 4 so that loads acting on the inner block in the four directions (radial, reverse-radial, and two lateral directions) show the same rated load. Thus, the SKR-type LM guide actuators can be mounted in any orientation. 4 4 4 4 Fig. Load-carrying Capacity and Contact Angles of the SKR. High Rigidity The adoption of the U-shaped outer rail allows improved rigidity against moment loads. Axis Y Center of gravity Axis X SKR SKR lx ly Mass: [kg/100mm].0 10 4.14 10 0. 1. 10 4 1.4 10 0.9 Unit: mm 4 Fig. Sectional View of Outer Rail lx = geometrical moment of inertia around axis X [mm 4 ] ly = geometrical moment of inertia around axis Y [mm 4 ] 1 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

. High Precision The linear motion guide raceway has four rows of circular arc grooves that provide smooth motion under pre-load, delivering clearance-free guidance with high rigidity against moment and torsion. In addition, changes in frictional resistance resulting from load variations are minimized, allowing the SKR-type to achieve high-precision feed. Rolling center of a ball Fig.4 Contact Structure of SKR-Type 4. Space Saving The integration of a miniature LM guide and a miniature ball screw allow the SKR/-type to achieve high rigidity and high precision in a minimal space. 10mm SKR SKR 10mm Fig. Cross Section of SKR-Type. Long Life Span and Long-term Maintenance-free Operation Utilizing the caged ball technology in the LM guide sections, and by adopting a QZ lubricator in the ball screw sections, the SKR has improved grease retention, and hence which leads to a long life span and long-term maintenance-free operation.. Excellent Smooth Motion Capability Caged all Technology also helps the SKR-type eliminate ball-to-ball friction, significantly improving the torque characteristics. It minimizes torque variations, allowing excellent smooth motion capability. Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Specifications Rated Loads LM Guide all Screw Support earing Radial clearance asic dynamic load rating Ca [N] asic static load rating C0a [N] asic dynamic load rating C [N] asic static load rating C0 [N] Screw shaft outer diameter Lead Root diameter all center diameter Normal grade / High-accuracy grade Precision grade Normal grade / High-accuracy grade Precision grade Normal grade / High-accuracy grade Precision grade asic dynamic load rating Ca [N] Permissible static load P0a [N] Notes: The rating of the LM Guide is the rated load per Inner block. SKR 010 00-0.004 to 0-0.00 to -0.004 1..0.1. 0 0 0 100 110 140 110 100 110 SKR 1000 100-0.00 to 0-0.00 to -0.00....4 0 190 0 90 40 10 40 900 00 10 Accuracy Standard Accuracy Standard Normal grade High-accuracy grade (H) Precision grade (P) Positioning Repeatability Accuracy ±0.01 ±0.00 ±0.00 Positioning Accuracy 0.00 0.0 SKR Running Parallelism 0.0 0.010 acklash 0.0 0.010 0.00 Starting Torque [N-cm] 0. 0. 1. Positioning Repeatability Accuracy ±0.01 ±0.00 ±0.00 Positioning Accuracy 0.00 0.0 SKR Running Parallelism 0.0 0.010 acklash 0.0 0.010 0.00 Starting Torque [N-cm] 1. 1. 4.0 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Permissible Static Moment / Equivalent Moment Factor SKRA SKR SKRA SKR Direction MA [kn-m] 0.0 0. 0.11 0.9 Permissible Static Moment M [kn-m] 0.0 0. 0.11 0.9 MC [kn-m] 0.09 0.19 0. 0. Equivalent Moment Factor KA, K.4 10-1 4. 10-1.9 10-1.1 10 - Note: The values for models SKR- indicate the values when two blocks are used in close contact with each other. Note:KA: moment equivalent coefficient in the MA direction K: moment equivalent coefficient in the M direction KC: moment equivalent coefficient in the MC direction KC.0 10 -.0 10 -.1 10 -.1 10 - Maximum Travel Speed The SKR-type is compatible with the latest high-speed rotational AC servo-motors (000 min -1 ) Moreover, the lineup of the -mm lead type allows a higher feed rate. The maximum manufacturing length is shown as the outer rail length. SKR SKR all Screw s Lead 1 Outer rail Length 100 10 0 100 10 0 10 0 0 00 10 0 0 00 Maximum Travel Speed [mm/s] 100 100 100 00 00 00 0 0 0 0 00 00 00 00 Maximum Manufacturing Length Note: Maximum Travel Speed is when the rotational speed of the motor is 000 min -1. 0 0 4 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Accuracy Standards The precision of the SKR is determined by positioning repetitive repeatability, positioning accuracy, backlash, and running parallelism. Positioning Repetitive Repeatability After repeating positioning to a given point in the same direction seven times, measure the halting point and obtain the value of half the maximum difference. Perform this measurement in the center and both ends of the travel distance, use the maximum value as the measurement value and express the value of half the maximum difference with symbol "±" as positioning repeatability. t1 t t Fig. Repetitive Positioning Accuracy Positioning Accuracy The positioning accuracy is expressed as the absolute value of maximum difference in error between the actual distance traveled from the reference position and the commanded value when the maximum stroke is defined as the reference length. (+) A (Error) Reference position 0 A Instructed value A Distance traveled A= Distance actually traveled Instructed travel distance value ( ) Fig. Positioning Accuracy acklash Feed and slightly move the inner block and read the measurement on the test indicator as the reference value. Subsequently, apply a load to the inner block from the same direction (table feed direction), and then release the inner block from the load. Use the difference between the reference value and the return as the backlash measurement. Perform this measurement in the center and near both ends, and use the maximum value as the measurement value. acklash Screw feed Load Return Load displacement (including elastic displacement) Fig. acklash Running Parallelism Place a straightedge on the surface table where model SKR is mounted, measure almost throughout the travel distance of the inner block using a test indicator. Use the maximum difference among the readings within the travel distance as the running parallelism measurement. Straightedge Fig.9 Travel Parallelism Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

How to Interpret the Number 10 SKR 0 A +0L P 0-0 0 0 0 1 4 9 1 number all screw lead Type of inner block 4 Outer rail length Accuracy grade Presence/Absence of a motor Presence/Absence of a cover Sensor specifications 9 Type of Motor bracket (housing-a, intermediate flange) (See page 1) 10 Control number Accuracy grade Provision of Motor Provision of Cover Description Symbol Description Symbol Description Symbol Normal grade No Symbol Not provided 0 Not provided 0 High-accuracy grade Precision grade H P Provided (assembled at THK) 1 Provided 1 Sensor Specifications Symbol 0 1 4 9 A C D E F Description None With sensor rail photosensors proximity sensors Normally OPEN proximity sensors Normally OPEN photosensors proximity sensors Normally OPEN proximity sensors Normally OPEN proximity sensors Normally CLOSED proximity sensors Normally CLOSED proximity sensors Normally CLOSED Proximity sensor Normally OPEN (1), Normally CLOSED () Proximity sensor Normally OPEN (1), Normally CLOSED () Proximity sensor Normally OPEN (1), Normally CLOSED () Proximity sensor Normally OPEN (1), Normally CLOSED () (PNP OUTPUT) Type EE-SX1 (OMRON) GL-1F (SUNX) GXL-N1F (SUNX) EE-SX4 (OMRON) APM-DA1-001(YAMATAKE) GL-N1F (SUNX) GL-N1F (SUNX) GXL-N1F (SUNX) APM-D1-00(YAMATAKE) GL-N1F (1 unit), GL-N1F ( units) GXL-N1F (1 unit), GXL-N1F ( units) APM-DA1-001 (1 unit), APM-D1-00 ( units) GXL-N1F-P (1 unit), GXL-N1F-P ( units) Accessory Mounting screw Mounting screw/nut, detecting plate, sensor rail, mounting plate, connector (EE-1001) Mounting screw/nut, detecting plate, sensor rail, fixture (MS-GL1) Mounting screw/nut, detecting plate, sensor rail, fixture (MS-GXL1) Mounting screw/nut, detecting plate, sensor rail, mounting plate, connector (EE-1001) Mounting screw/nut, detecting plate, sensor rail Mounting screw/nut, detecting plate, sensor rail Mounting screw/nut, detecting plate, sensor rail Mounting screw/nut, detecting plate, sensor rail, fixture (MS-GXL1) Mounting screw/nut, detecting plate, sensor rail Mounting screw/nut, detecting plate, sensor rail Mounting screw/nut, detecting plate, sensor rail, fixture (MS-GXL1) Mounting screw/nut, detecting plate, sensor rail Mounting screw/nut, detecting plate, sensor rail, fixture (MS-GXL1) Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

SKR Standard Specifications SKR A (with a single long block) SKR (with two long blocks) L1 49 Outer rail length 10 14 4 (44.*).. 4h 1 -M. depth 4 4-M depth -M1. depth.4 n-.4 through hole. counter bore depth 1 1 4MIN (Dimension with two inner 10 blocks in close contact) A h 10 0.9 M. depth 4 (Same position on the opposite side). G 0 (n-1) 0 (G). 9. 4-M depth. 0 0 9.. 9. PCD9 4-.4 through hole 0. 0 11 1 1 1. 40 View A Section - *: lock length for calculating available stroke length. lock length of SKR (with two blocks) is 90. mm. Outer rail Length 100 10 0 Overall Length L1 19 9 9 Available Stroke Range Type A Type 40.9 90.9 44.9 140.9 94.9 G 1 40 n Overall main unit mass [kg] Type A Type 0.4 0. 0. 0. 0. Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

SKR (with the Cover) SKR A (with a single long block) SKR (with two long blocks) L 1 Outer rail length. 4-M4 depth 14. 1 1 A 9. 4-M depth. 0. 9. 0 9. PCD9 0. 1. 1 (1) 4 -M depth 4. (Same position on the opposite side) h 1 0 4-.4 through hole 40 View A Section - Outer rail Length Overall Length L1 Available Stroke Range Type A Type G n Overall main unit mass [kg] Type A Type 100 19 40.9 0. 10 9 90.9 44.9 1 0.4 0. 0 9 140.9 94.9 40 0.9 0.91 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

SKR Standard Specifications SKR A (with a single long block) SKR (with two long blocks) L 1 0 Outer rail length 10 1. 1 4. (.*) 10 4.4 h 0 4-M4 depth 4 -M depth -M depth n-4. through hole counter bore depth 4 1 4 14 1 4 MIN (Dimension with two inner blocks in close contact) A 4h M. depth 4 (Same position on the opposite side) 49.4 4 1 0. G (n-1) 0 (G). 4-M depth 1 4 11 0.. 1 1. PCD 4-. through hole 4 1. 0 View A Section - *: lock length for calculating available stroke length. lock length of SKR (with two blocks) is 1. mm. Outer rail Length Overall Length L1 Available Stroke Range Type A Type G n Overall main unit mass [kg] Type A Type 10.4 0.99 0 0 11.4 4. 1. 1. 0 1.4 104. 4 1.41 1.9 00 0 1.4 14. 0 4 1. 1. 9 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

SKR (with the Cover) SKR A (with a single long block) SKR (with two long blocks) L 1 Outer rail length 4.4 0 4-M4 depth 1 1 4 14 -M depth 4 (Same position on the opposite side) A 49.4 4-M depth 4 4 4 0. 1 11. 40. (0.) 4. PCD 4-. through hole 4 0 View A Section - Outer rail Length 10 0 0 00 Overall Length L1 0 0 Available Stroke Range Type A Type.4 11.4 4. 1.4 104. 1.4 14. G 4 0 n 4 Overall main unit mass [kg] Type A Type 1.1 1. 1. 1.4 1.9 1..01 10 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Seals The SKR is equipped with an end seal and side seal as standard for dust-proofing. Side seal End seal Sensors Proximity sensors and photosensors are available as options for the SKR and SKR. When a customer specifies a model with a sensor, specially designed sensor rails and sensor dogs are supplied with the product. (See page for details.) Sensor rails It is also possible to install a sensor rail only. Unit: mm Proximity sensors GL-1F GL-N1F() GXL-N1F() GXL-N1F()-P (SUNX) (a) (b) a b c Unit: mm d SKR 4. 4 SKR 9. (c) (d) 11 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Proximity sensors APM-DA1-001 APM-D1-00 (YAMATAKE) (a) (b) a b c Unit: mm d SKR.. SKR. (c) (d) Photosensors EE-SX1 (OMRON) (f) (e) (g) (h) (j) (i) Unit: mm e f g h i j SKR 41 4 1 9.4 1 9. SKR 4.. 1 11. 11. Photosensors EE-SX4 (OMRON) (f) (e) (g) (h) (j) (i) Unit: mm e f g h i j SKR. 4 1. 11 0. 11 SKR 44 0 1. 1. 1 1 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

0 0 Intermediate Flanges Applicable Motors and Applicable Intermediate Flanges The SKR-type is provided with intermediate flanges so that a variety of motors can be installed. The table below shows the control number of the intermediate flanges meeting the applicable motors on a model number basis. At the time of order, specify the intermediate flange control number. AC Servo Motors Stepping Motors Yaskawa Electric Mitsubishi Electric Matsushita Electric SANYO Electric Oriental Motor OMRON FANUC KEYENCE MELSERVO -% -# -@ -mini J J Super J-Jr MINAS A4 MINAS A # SANMOTION Q1 OMNUC W SMARTSTEP A Five phase Two phase is series MV Step Motor CSK@ RK UMK CSK SGMJV-A (0W) SGMAV-A (0W) SGMAS-A (0W) SGMAH-A (0W) SGMAH-A (0W) SGMM-A1 (10W) SGMM-A (W) SGMM-A (0W) HF-MP0 (0W) HF-KP0 (0W) HC-MFS0 (0W) HC-KFS0 (0W) HC-AQ01 (10W) HC-AQ0 (W) HC-AQ0 (0W) MSMD A (0W) MSMA A (0W) MSMA A (0W) Q1AA0400D (0W) Q1AA0400D (0W) RM-W000 (0W) RM-W000 (0W) RM-A000 (0W) RM-A000 (0W) 0./000is (0W) MV-M0 (0W) ASC* AS 4, ASC4, AR4 CSK* CSK4* RK4* UMK4* CSK4* Flange angle 40 40 40 40 40 40 4 4 4 4 4 SKR Note 1: Symbols in the SKR type columns show the lower two digits of the intermediate flange control numbers. Note : Please contact THK regarding the coupling when installing motors in the above table. N M 0A 0F 0F SKR 0N 0M 0A 0F 0F SKR Dimensions of the Intermediate Flanges 0A Intermediate flange model Last two symbols of control No... 40. 4-.4 through hole. counter bore depth 4-M 0. through hole (PCD9) (PCD4, 90 equidistant) 4-.4 through hole. counter bore depth. (PCD9) 4-M4 0. through hole (PCD4, 90 equidistant) 4 1 0F 9. 1 1 0 0. 4-.4 through hole counter bore depth. (from the back side) 4-M 0. through hole 4- through hole counter bore depth 4 (from the back side) 4-M 0. through hole 1 1 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Dimensions of the Intermediate Flanges M 9. N 9. 19. 4-M through hole 4-M. through hole (PCD, 90 equidistant) 1. 4-M through hole 4-.4 through hole. counter bore depth. (from the back side) SKR 0A Intermediate flange model Last two symbols of control No... 40. 4-.4 through hole. counter bore depth (PCD, 90 equidistant) 4-M 0. through hole (PCD4, 90 equidistant) 4-M4 0. through hole (PCD4, 90 equidistant) 4-.4 through hole. counter bore depth. (PCD, 90 equidistant) 1. 0F 49 4 4 4-.4 through hole counter bore depth. (from the back side) 4-M 0. through hole 4- through hole counter bore depth 4 (from the back side) 4-M 0. through hole 0M 49 0N 49 19. 4 1 4 1 4 4 49 4-M. through hole (PCD, 90 equidistant) 4-M through hole. 4-.4 through hole. counter bore depth. (from the back side) 4-M through hole 14 Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com

Type SKR/ Miniature LM Guide Actuator with Caged all Technology Precautions on Use Handling Do not disassemble the product; doing so may result in the entry of foreign material or the decreased accuracy of the assembly. Handle the product carefully. Dropping or striking it may result in breakage. Applying shock to the product may result in functional damage even if the product appears to have no visible damage. Lubrication Thoroughly wipe off the rust-preventive oil from the product and then fill it with lubricant before use. Do not mix and use lubricants with different properties. If the product is to be used in locations constantly exposed to vibration or in special environments such as clean rooms, vacuum, low temperature, or high temperature, there are cases where ordinary grease cannot be used. In such cases, contact THK. When special lubricants are used, contact THK. When oil lubrication is to be used, contact THK. To obtain maximum performance from the SKR, lubrication is essential. Use of the product without lubrication may result in increased abrasion at rolling sections or a shorter life. Standard grease: THK AFA grease. The standard SKR model has no grease nipples. Apply grease directly to the rolling surfaces. Please contact THK if you wish to have a grease nipple provided on the product. A low dust-generating grease, THK AFF, is available for use in clean rooms. Contact THK. Precautions on Use Entry of foreign material may cause damage to the ball circulating path or loss of function. Prevent foreign material, such as dust or chips, from entering the system. When using the system in an environment where coolant penetrates the inner block, contact THK. This product must be used within a temperature range of 0 to +40 C (no freezing or condensation must occur). When using the system at temperatures of +40 C or higher, contact THK. If foreign material, such as dirt or chips, penetrates the system, replenish the lubricant after cleaning the product. For available types of cleaning fluid, contact THK. Operating the product exceeding the permissible revolution speed may lead to part breakage or accidents. The operating rotational speed should be limited to the range specified by THK. When using the product in locations constantly exposed to vibrations or in special environments such as clean rooms, vacuum, low temperature or high temperature, contact THK. Precautions on Safety When the product is in operation or is ready for operation, DO NOT touch any moving parts of the product. Do not come within the operating range of the actuator. When two or more persons engage in work concerning the product, previously confirm the procedure, signaling, and measures against abnormal conditions and arrange for an observer. Strage When storing the SKR, pack it in the package specified by THK and store it in the horizontal state while avoiding low and high temperatures, and high humidity. LM GUIDE and are the registered trademarks of THK CO., LTD. There may be differences between products appearing in photographs and the actual product. The appearance, specifications, and other information are subject to change without prior notice to improve reliability, function, etc. When deciding to adopt the product, contact us beforehand. We have exercised great care in preparing this catalog, but it is still possible that there are misspellings, omissions of letters, etc. THK assumes no responsibility or liability for damage resulting from such errors possibly contained herein. We employ the basic policy of observing the Foreign Exchange and Foreign Trade Control Law of Japan with regard to the export of our products/technologies or sales for export. For export of our products as discrete components, consult THK beforehand. All rights reserved. HEAD OFFICE -11-, NISHI-GOTANDA, SHINAGAWA-KU, TOKYO 141-0 JAPAN INTERNATIONAL SALES DEPARTMENT PHONE:+1--44-01 FAX:+1--44-0 NORTH AMERICA THK America,Inc. HEADQUARTERS Phone:+1-4-10-1111 Fax:+1-4-10-11 CHICAGO OFFICE Phone:+1-4-10-1111 Fax:+1-4-10-11 NEW YORK OFFICE Phone:+1-4-9-40 Fax:+1-4-9-4909 ATLANTA OFFICE Phone:+1-0-40-990 Fax:+1-0-40-9 LOS ANGELES OFFICE Phone:+1-949-9-14 Fax:+1-949-9-149 SAN FRANCISCO OFFICE Phone:+1-9-4-94 Fax:+1-9-4-9 OSTON OFFICE Phone:+1-1--111 Fax:+1-1--99 DETROIT OFFICE Phone:+1-4--90 Fax:+1-4--94 TORONTO OFFICE Phone:+1-90--00 Fax:+1-90--11 SOUTH AMERICA THK rasil LTDA Phone:+-11--0100 Fax:+-11--0101 EUROPE THK GmbH EUROPEAN HEADQUARTERS Phone:+49-10-4-0 Fax:+49-10-4-1 DÜSSELDORF OFFICE Phone:+49-10-4-0 Fax:+49-10-4-99 FRANKFURT OFFICE Phone:+49-10-4-0 Fax:+49-10-4-99 STUTTGART OFFICE Phone:+49-10-9199-0 Fax:+49-10-9199- MÜNCHEN OFFICE Phone:+49-9-01-0 Fax:+49-9-01- U.K. OFFICE Phone:+44-190-0-00 Fax:+44-190-0-00 ITALY MILANO OFFICE Phone:+9-09-4-9 Fax:+9-09-4- ITALY OLOGNA OFFICE Phone:+9-01-41-11 Fax:+9-01-41-0 SWEDEN OFFICE Phone:+4--44-0 Fax:+4--44-9 AUSTRIA OFFICE Phone:+4-9-1400 Fax:+4-9-1400-9 SPAIN OFFICE Phone:+4-9--40 Fax:+4-9--4 TURKEY OFFICE Phone:+90-1--400 Fax:+90-1-9-10 PRAGUE OFFICE Phone:+4--410-100 Fax:+4--410-199 THK France S.A.S. Phone:+-4-49-1400 Fax:+-4-49-1401 CHINA THK (CHINA) CO.,LTD. HEADQUARTERS Phone:+-411--111 Fax:+-411--000 SHANGHAI OFFICE Phone:+-1-19-000 Fax:+-1-19-990 EIJING OFFICE Phone:+-10-441- Fax:+-10-90- CHENGDU OFFICE Phone:+---0 Fax:+--- GUANGZHOU OFFICE Phone:+---41 Fax:+--01-04 THK (SHANGHAI) CO.,LTD. Phone:+-1--0 Fax:+-1-19-990 TAIWAN THK TAIWAN CO.,LTD. TAIPEI HEAD OFFICE Phone:+---1 Fax:+---19 TAICHUNG OFFICE Phone:+-4-9-10 Fax:+-4-9-10 TAINAN OFFICE Phone:+--9- Fax:+--9-9 KOREA SEOUL REPRESENTATIVE OFFICE Phone:+--4-41 Fax:+--4-4 SINGAPORE THK LM SYSTEM Pte. Ltd. Phone:+-4-00 Fax:+-4-0 INDIA ANGALORE REPRESENTATIVE OFFICE Phone:+91-0-0-14 Fax:+91-0-14- THK CO., LTD. 000 E Printed in Japan Polígono Indutrial O Rebullón s/n. 41 - Mos - España - rodavigo@rodavigo.com