HIWIN LINEAR GUIDEWAYS - Ruch Servomotor

1 Ruchservomotor JV 220141, Kooprevicha Str. 1/3, Minsk, Republic of Belarus. LINEAR GUIDEWAYT echnical Information 31. General 31-1 Advantages and Features of LINEAR 31-2 The Principles of Selecting LINEAR 61-3 Basic Load Rating of LINEAR 71-4 The Service Life of LINEAR 71-5 Acting 101-6 121-7 131-8 The Butt-joint 131-9 Layout 141-10 Installation of LINEAR 152. HIWIN LINEAR Guideway Product 192-1 LG 202-1-1 Features of the LG Series LINEAR 202-1-2 Construction of LG 202-1-3 Model Number of LG 202-1-4 222-1-5 Accuracy 232-1-6 262-1-7 272-1-8 272-1-9 Dust Protection 292-1-10 302-1-11 The Accuracy Tolerance of Mounting 312-1-12 Cautions for 322-1-13 Standard Length and Max. Length of 332-1-14 Dimensions for HIWIN LG 352-2 AG 402-2-1 Features of the AG Series LINEAR 402-2-2 Construction of AG 402-2-3 Model Number of AG 402-2-4 422-2-5 Accuracy 43 Ruchservomotor JV 220141, Kooprevicha Str.

2 1/3, Minsk, Republic of Belarus. 452-2-7 452-2-8 452-2-9 Dust Protection 472-2-10 482-2-11 The Accuracy Tolerance of Mounting 482-2-12 Cautions for 502-2-13 Standard Length and Max. Length of 512-2-14 Dimensions for HIWIN AG 522-3 Miniature MGN / MGW 562-3-1 Features of MGN 562-3-2 Construction of MGN 562-3-3 Features of MGW 562-3-4 Construction of MGW 572-3-5 572-3-6 Model Number of MGN / MGW 572-3-7 Accuracy 592-3-8 602-3-9 Dust Protection 602-3-10 Shoulder Heights and 612-3-11 Standard Length and Max. Length of 612-3-12 Dimensions for HIWIN MGN / MGW 632-4 E1 (Self-Lubricated) Option 652-5 Q1 (Low Noise) Option 672-6 SE (Heat resistant) Option 68* The specifications in this catalogue are subject to change without JV 220141, Kooprevicha Str. 1/3, Minsk, Republic of Belarus. LINEAR guideway allows a type of LINEAR motion that utilises rolling balls.

3 By using circulating balls between the railand the block, a LINEAR guideway can achieve high precision LINEAR motion. Compared to a traditional slide, the coefficientof friction for a LINEAR guideway is only 1/50th. Because of the restraint effect between the rails and the blocks, linearguideways can take up loads in both the up/down and the left/right directions. With these features, LINEAR GUIDEWAYS cangreatly enhance moving accuracy, it is especially true when accompanied with precision General Information1-1 Advantages and Features of LINEAR Guideway1-1-1 Advantages of LINEAR GUIDEWAYS (1) High positional accuracyWhen a loaded plate is driven by a LINEAR motion guideway, the frictional contact between the loaded plateand the bed is rolling contact. The coefficient of friction is only l/50th of traditional contact, and the differencebetween the dynamic and the static coefficient of friction is small.

4 Therefore, there would be no slippage whilethe table is moving.(2) Long life with highly accurate motionWith a traditional slide, errors in accuracy are caused by the counter flow of the oil film. Insufficientlubrication causes wear between the contact surfaces, which become increasingly inaccurate. In contrast,rolling contact has little wear; therefore, machine can achieve a long life with highly accurate motion.(3) High speed motion is possible with a low driving forceBecause the LINEAR guideway has little friction resistance, only a small driving force is needed for movingthe loaded table. The result of this fact is the power savings. This is especially true for the reciprocating parts.(4) Equal loading capacity in all directionsBecause of its special constraint design, a LINEAR guideway can take up loads in either the up/down orleft/right directions. Conventional LINEAR slides can only take up small loads in the direction parallel to thecontact surface.

5 They are also more likely to become inaccurate when they are subjected to these loads.(5) Easy installation and interchangeabilityInstalling a LINEAR guideway is fairly easy. Grinding or milling the machine surface, following arecommended installation procedure, and tightening the bolts to their specified torque can achieve highaccuracy LINEAR motion. However, a traditional slide takes more time to scrape the tracks. If any errors inaccuracy arise, the surface must be scraped again. In contrast, LINEAR GUIDEWAYS are interchangeable.(6) Easy lubricationWith a traditional sliding system, insufficient lubrication wears out the contact surfaces. Also, it can bequite difficult to supply sufficient lubrication to the contact surfaces because finding an appropriate lubricationpoint is not very easy. With a LINEAR motion guideway, grease can be easily supplied through the grease nippleon the LINEAR guideway block.

6 It is also possible to utilise a centralised oil lubrication system by piping thelubrication oil to piping JV 220141, Kooprevicha Str. 1/3, Minsk, Republic of Belarus. Features of the HIWIN LINEAR Guideway(1) Gothic contactThe HIWIN LINEAR guideway has the Gothic archcontact design. Because of the special constraintdesign, the LINEAR guideway can take up loads inup/down and left/right directions. Furthermore, thesymmetrical four-point constraint design gives nopositional deflection while the LINEAR guideway isrunning. Accordingly, the rigidity and accuracy of theHIWIN LINEAR guideway is higher than that of circularcontact. Table Load loadUpward loadLateral loadMoment load Table Comparison of Both Gothic Arch Contact Design and Circular Contact Arc ContactCircular Contact When a LINEAR guideway is subjected a lateral load,balls will have no positional deflection because the ballsare completely restrained within raceway groove.

7 Thisdesign achieves a high running accuracy. Because there is no constraint in the perpendiculardirection, a large positional deflection will occur when alateral load is applied to this LINEAR motion guideway. Itwill also have poor accuracy. For this simple two-row Gothic arch contact design, it ispossible to handle loads in both the up/down and thelateral directions. Compared to a Gothic arch design, a circular designneeds four circular arcs to handle the same JV 220141, Kooprevicha Str. 1/3, Minsk, Republic of Belarus. (2) InterchangeabilityBecause of restricted dimension control, the dimensional difference of LINEAR GUIDEWAYS can be kept in areasonable range, and which means that the specific series of LINEAR GUIDEWAYS possess theinterchangeability. For this characteristic, it is good to have the stock of rails and blocks separately for savingthe space of warehouse.

8 (3) The optimum designAs for the design of circulating system, HIWIN has obtained patents from many developed ball diameter and circulating curve ratio of design makes circulation smoother as well as makesservice life longer.(4) High accuracyAs shown in the figure, both sides of raceway groove are ground simultaneously, and this ensures nearlyperfect parallelism for all four surfaces. Therefore, high accuracy repetition is possible when it is installed bytightening the mounting bolts with torque wrench to a specified JV 220141, Kooprevicha Str. 1/3, Minsk, Republic of Belarus. The Principles of Selecting LINEAR GuidewayIdentify the condition Applied equipment Inner space limit Accuracy Stiffness Way of loading Moving distance Moving speed, acceleration Using frequency Using life EnvironmentSelection of series LG series Grinding, milling and drilling machine, lathe, machine centre AG series Automatic equipment, high speed transfer device, semiconductor equipment,wood cutting machine, precision measure equipment MGN/MGW series Miniature device, semiconductor equipment, medical equipmentSelection of accuracy Classes.

9 C, H, P, SP, UP depends on the accuracy of equipmentAssuming the size & the number of blocks Depends on experiences Load condition If accompanied with a ballscrew, the size should be similar to the diameter of example, if the outer diameter of the ballscrew is 35mm, then the model size of linearguideway should be LG35 Calculate the max. load of block Make reference to load calculation examples, and calculate the max. load Be sure that the static safety factor of selected guideway is bigger than that in the table ofstatic safety factorChoosing preload Depends on the stiffness requirement and accuracy of mounting surfaceIdentify stiffness Calculate the deformation ( ) by using the table of stiffness values, choosing heavierpreload and bigger size LINEAR guideway to enhance the stiffnessCalculating service life Calculate the life time requirement by using the moving speed and frequency. Makereference to the life calculation exampleSelection of lubrication Grease supplied by grease nipple Oil supplied by piping jointComplete of selectionRuchservomotor JV 220141, Kooprevicha Str.

10 1/3, Minsk, Republic of Belarus. Basic Load Rating of LINEAR Guideway1-3-1 Basic Static Load Rating (C0)(1) DefinitionA local permanent deformation will be caused between the raceway surface and the rolling balls when alinear guideway is subjected to an excessively large load or an impact load while either at rest or in motion. Ifthe amount of this permanent deformation exceeds a certain limit, it becomes an obstacle to the smoothoperation of the LINEAR guideway. Generally, the definition of the basic static load rating is a static load ofconstant magnitude and direction, which results in a total permanent deformation of times the diameterof the rolling ball for the rolling ball and the raceway at the contact point subjected to the largest stress. Thevalue is described in the dimension tables for each LINEAR guideway. A designer can select a suitable linearguideway by referring to these tables.