ADVANCED MOTION TECHNOLOGIES CORP.

Transcription

1 LINEAR GUIDEWAY ADVANCED MOTION TECHNOLOGIES COR. No.7, Lane 89, Chung Shan Rd., Shen Kang Hsiang, Taichung Hsien 49, Taiwan TEL: FAX: Web site: GET/MD/. C AMT

2 Content. The Characteristics of AMT Linear Guideways.... The rocedure of Select Linear Guideway.... Load Rating and Service Life of Linear Guideway.... Basic Static Load Rating (C).... Static ermissible Moment (M).... Static Safety Factor (fs)....4 Basic Dynamic Load Rating (C)...4. Calculation of Nominal Life (L) Calculation of Service Life in Time (Lh) Friction Coefficient...6. Calculation of Working Load Calculation of the Equivalent Load The Calculation of the Mean Load Calculation Example Installation Direction of Linear Guideway...6. Fixing Methods of Linear Guideway...7. Installation of Linear Guideway...7. Installation of Linear Guideway When Machine Subjected to Vibration and Impact...7. Installation of Linear Guideway without ush Screws...9. The Installation of Carriage of Linear Guideway without the Reference Side for Master Rail...4 Accuracy Measurement after Installation.... The Recommended Tightening Torque for Rails.... Marking on Master Linear Guideway and Combined Case.... Recognizing of Reference Side.... Recognizing of Master Rail.... Combined Use of Rail and Carriage....4 For Buttjoint Rail.... The Relationship between the Direction of Lubrication and the Reference Side Accuracy Standard.... The Selection of Accuracy Grade reload and Rigidity The Selection of reload Lubrication lastic Caps for rail mounting hole.... Construction and Characteristics of MSA and MSB Series.... MSA Series Heavy Load Type.... Carriage Type.... Rail Type.... Description of Specification....4 Accuracy Grade.... reload Grade and Rigidity Dust roof The Shoulder Height and Corner Radius for Installation Dimensional Tolerance of Mounting Surface Tappedhole Rail Dimensions...9. Rail Standard and Maximum Length...4. Dimensions of MSAA / MSALA...4. Dimensions of MSAE / MSALE...4. Dimensions of MSAS / MSALS...4. MSB Series Compact Type Carriage Type Rail Type Description of Specification Accuracy Grade reload Grade and Rigidity Dust roof The Shoulder Height and Corner Radius for Installation....8 Dimensional Tolerance of Mounting Surface....9 Tappedhole Rail Dimensions.... Rail Standard and Maximum Length.... Dimensions of MSBTE / MSBE.... Dimensions of MSBTS / MSBS...4. AMT Linear Guideway with SL Lubricator.... Construction and Features.... erformance...6. Description of Specification Dimensions of the SL Lubricator...8 AMT Linear Guideway Request Form...9 GET/MD/.

3 . The Characteristics of AMT Linear Guideways High positioning accuracy, high repeatability The AMT linear guideway is a design of rolling motion with a low friction coefficient, and the difference between dynamic and static friction is very small. Therefore, the stickslip will not occur when submicron feeding is making. Low frictional resistance, high precision maintained for long period The frictional resistance of a linear guideway is only /th to /4th of that in a slide guide. With a linear guideway, a well lubrication can be easily achieved by supplying grease through the grease nipple on carriage or utilizing a centralized oil pumping system, thus the frictional resistance is decreased and the accuracy could be maintained for long period. High rigidity with fourway load design The optimum design of geometric mechanics makes the linear guideway to bear the load in all four directions, radial, reversed radial, and two lateral directions. Furthermore, the rigidity of linear guideway could be easily achieved by preloading carriage and by adding the number of carriages. Suitable for high speed operation Due to the characteristic of low frictional resistance, the required driving force is much lower than in other systems, thus the power consumption is small. Moreover, the temperature rising effect is small even under high speed operation. Easy installation with interchangeability Compared with the highskill required scrapping process of conventional slide guide, the linear guideway can offer high precision even if the mounting surface is machined by milling or grinding. Moreover the interchangeability of linear guideway gives a convenience for installation and future maintenance. GET/MD/.

4 . The rocedure of Select Linear Guideway span, No. of carriages,no. of rails change Identify the operating conditions arameters for calculating load on the linear guideway Space available for installation Size (span, No. of carriages, No. of rails) Installation position (horizontal, vertical, tilted, or wallhung, etc.) Magnitude, direction, and location of imposed load Frequency of use (duty cycle) Stroke length Moving speed, acceleration Required service life, and accuracy Operating environment Type or size changed Select type Select proper type and size (If applied with ballscrew, the size of guideway should be similar to diameter of ballscrew.) Calculate the applied load Calculate the load applied on each carriage. Calculate the equivalent load Convert the load of block exerts in each direction into equivalent load. Calculate the static safety factor The safety factor verified by basic static load rating and max equivalent load. No Verification of safety factor Yes Calculate mean load Averaging the applied loads that fluctuate during operation and convert them into mean load. Calculate nominal life Using the servicelife equation to calculate the running distance or hours. No Does the calculated value satisfy the required service life Yes Identify stiffness Select preload Determine the fastening methods Determine the rigidity of fastened area Identify accuracy Select accuracy grade Identify the precision of mounting surface Lubrication and dust protection Types of lubrication (grease, oil, special lubrication) Method of lubrication (periodic or forced lubrication) Dust prevention design. Completion GET/MD/.

5 . Load Rating and Service Life of Linear Guideway To obtain a model which is most suitable for your service conditions of the linear guideway system, the load capacity and service life of the model must be taken into consideration. To verify the static load capacity, the basic static load rating (C) is taken to obtain the static safety factor. The service life can be obtained by calculating the nominal life based on basic dynamic load rating. As the raceways or rolling balls are subjected repeated stresses, the service life of a linear guideway is defined as the total running distance that the linear guideway travel until flaking occurs.. Basic Static Load Rating (C) A localized permanent deformation will develop between raceways and rolling balls when a linear guideway receives an excessive load or a large impact. If the magnitude of the deformation exceeds a certain limit, it could obstruct the smooth motion of the linear guideway. The basic static load rating (C) refers to a static load in a given direction with a specific magnitude applied at the contact area under the most stress where the sum of permanent deformation develops between the raceway and rolling balls is. times of the diameter of rolling ball. Therefore, the basic static load rating sets a limit on the static permissible load.. Static ermissible Moment (M) When a moment is applied to a linear guideway, the rolling balls on both ends will receive the most stress among the stress distribution over the rolling balls in the system. The static permissible moment (M) refers to a static moment in a given direction with specific magnitude applied at the contact area under the most stress where the sum of permanent deformation develops between the raceway and rolling balls is. times the diameter of rolling ball. Therefore, the static permissible moment sets a limit on the static moment. In linear guideway system, the static permissible moment is defined as M MY MR three directions. See Fig.. M R M M Y Fig. Static permissible moment. Static Safety Factor (fs) Due to the impact and vibration while the guideway at rest or moving, or the inertia from start and stop, the linear guideway may encounter with an unexpected external force. Therefore, the safety factor should be taken into consideration for effects of such operating loads. The static safety factor (fs) is a ratio of the basic static load rating (C) to the calculated working load. The static safety factor for different kinds of application is shown as Table. f s f s Static safety factor C Basic static load rating (N) Static permissible moment (N m) M C M = or f s = M Calculated working load (N) M Calculated moment (N m) GET/MD/.

6 Table Standard value of static safety factor Machine Type Regular industrial machine Machine tool Load Condition Normal loading condition With impact and vibration Normal loading condition With impact and vibration fs (Lower limit).~..~..~..~7..4 Basic Dynamic Load Rating (C) Even when identical linear guideways in a group are manufactured in the same way or applied under the same condition, the service life may be varied. Thus, the service life is used as an indicator for determining the service life of a linear guideway system. The nominal life (L) is defined as the total running distance that 9% of identical linear guideways in a group, when they are applied under the same conditions, can work without developing flaking. The basic dynamic load rating (C) can be used to calculate the service life when linear guideway system response to a load. The basic dynamic load rating (C) is defined as a load in a given direction and with a given magnitude that when a group of linear guideways operate under the same conditions, the nominal life of the linear guideway is km. (if the rolling element is ball). Calculation of Nominal Life (L) The nominal life of a linear guideway can be affected by the actual working load. The nominal life can be calculated base on selected basic dynamic load rating and actual working load. The nominal life of linear guideway system could be influenced widely by environmental factors such like hardness of raceway, environmental temperature, motion conditions, thus these factors should be considered for calculation of nominal life. f = ( H f T C L ) f W L Nominal life (km) C Basic dynamic load rating (N) Working load (N) f H f T f W Hardness factor (see Fig.) Temperature factor (see Fig.) Load factor (see Table ) Hardness factor fh In order to ensure the optimum load capacity of linear guideway system, the hardness of raceway must be HRC8~64. If the hardness is lower than this range, the permissible load and nominal life will be decreased. For this reason, the basic dynamic load rating and the basic static load rating should be multiplied by hardness factor for rating calculation. See Fig.. The hardness requirement of AMT linear guideway is above HRC8, thus the fh=....9 Hardness factor (fh) Raceway hardness (HRC) Fig. Hardness factor GET/MD/. 4

7 Temperature factor ft When operating temperature higher than ûc, the nominal life will be degraded. Therefore, the basic dynamic and static load rating should be multiplied by temperature factor for rating calculation. See Fig.. The assemble parts of AMT guideway are made of plastic and rubber, therefore, the operating temperature below ûc is strongly recommend. For special need, please contact us.. Temperature factor (ft) Raceway temperature( ) Fig. Temperature factor Load factor fw Although the working load of liner guideway system can be obtained by calculation, the actual load is mostly higher than calculated value. This is because the vibration and impact, caused by mechanical reciprocal motion, are difficult to be estimated. This is especially true when the vibration from high speed operation and the impact from repeated start and stop. Therefore, for consideration of speed and vibration, the basic dynamic load rating should be divided by the empirical load factor. See Table. Table Load factor (fw) Motion Condition No impact & vibration Slight impact & vibration Moderate impact & vibration Strong impact & vibration Operating Speed V m/min V 6 m/min 6 V m/min V m/min fw.~..~..~..~..6 Calculation of Service Life in Time (Lh) When the nominal life (L) is obtained, the service life in hours can be calculated by using the following equation when stroke length and reciprocating cycles are constant. L h = L l n 6 S L h Service life in hours (hr) L l S Nominal life (km) Stroke length (m) n No. of reciprocating cycles per minute (min ) GET/MD/.

8 4. Friction Coefficient A linear guideway manipulates linear motion by circulating balls between the rail and the carriage. In which type of motion, the frictional resistance of linear guideway can be reduced to /th to /4th of that in a slide guide. This is especially true in static friction which is much smaller than that in other systems. Moreover, the difference between static and dynamic friction is very little, so that the stickslip situation does not occur. As such low friction, the submicron feeding can be carried out. The frictional resistance of a linear guideway system can be varied with the magnitude of load and preload, the viscosity resistance of lubricant, and other factors. The frictional resistance can be calculated by the following equation base on working load and seals resistance. Generally, the friction coefficient will be different from series to series, the friction coefficient of MSA and MSB series is.~. (without considering the seal resistance). F = + f F Frictional resistance (kgf) Dynamic friction coefficient Working load (kgf) f Seal resistance (kgf). Friction coefficient ( ).... Load ratio (/C) : Working load C: Basic dynamic load rating Fig. 4 Relationship between working load and friction coefficient GET/MD/. 6

9 . Calculation of Working Load The load applied to a linear guideway system could be varied with several factors such as the location of the center gravity of an object, the location of the thrust, and the inertial forces due to acceleration and deceleration during starting and stopping. To select a correct linear guideway system, the above conditions must be considered for determining the magnitude of applied load. Examples for calculating working load Type Operation Conditions Equations l = F 4 + F. l. l F. l. 4 l Horizontal application: Uniform motion or at rest 4 l F = F 4 F. l. l F. l. 4 l = F 4 F. l F. l. + l. 4 l l4 l 4 = F 4 + F. l F. l. + l. 4 l l = F 4 + F. l. l + F. l. 4 l Overhung horizontal application: Uniform motion or at rest 4 l4 F l l = F 4 F. l +. l F. l. 4 l = F 4 F. l F l. l. 4 l 4 = F 4 + F. l F l. l. 4 l l 4 F F. l = = = 4 =. l F. l 4 T = T = T = 4T =. l Vertical application: Uniform motion or at rest l T l4 T l 7 GET/MD/.

10 l F. l 4 = = = 4 =. l T Wall installation application: Uniform motion or at rest l4 T l T = 4T = T = T = F 4 + F 4 F. l. l F. l. l T F 4T 4 l = F. cos F +. cos. l 4. l F. cos. l. 4 l + F. sin. h. l h. F = F. cos F. cos. l 4. l F. cos. l F +. sin. h.. 4 l l Laterally tilted application l4 l T = F. cos F. cos. l 4. + l F. cos. l F. sin. h.. 4 l l 4 = F. cos F +. cos. l + 4. l l T l F. cos. l. 4 l F. sin. h. l T = 4T = F. sin F. sin. l + 4. l T = T = F. sin 4 F. sin. l. l = F. cos F +. cos. l 4. l Longitudinally tilted application h 4. F l T F. cos. l F +. sin. h.. 4 l l = F. cos F. cos. l 4. l F. cos. l F. sin. h.. 4 l l = F. cos F. cos. l 4. + l F. cos. l F. sin. h.. 4 l l 4 = F. cos F +. cos. l + 4. l l4 T l F. cos. l. 4 l + F. sin. h. l l T = 4T = + T = T = F. sin. l. 4 l F. sin. l. 4 l GET/MD/. 8

11 mg During acceleration = 4 = mg 4 = = mg 4 + m. l. l m. l. l l4 m. a. l 4 Horizontal application: Subjected to inertia l 4 l T T = T = T = 4T =. l In uniform motion T = T = T = 4T = mg 4 l 4T During deceleration Velocity V (m/s) t t t V an= tn t (s) Time = 4 = mg 4 = = mg 4 + m. l. l m. l. l m. a. l 4 T = T = T = 4T =. l Velocity diagram l During acceleration m. (g+a ). l = = = 4 =. l 4 mg T = T = T = 4T = m. (g+a ). l 4. l In uniform motion Vertical application: Subjected to inertia l T l4 ===4= T=T=T=4T= m. g. l. l m. g. l. 4 l T l V (m/s) V an= tn During deceleration m. (ga ===4=. ). l l Velocity T=T=T=4T= m. (ga. ). l 4 l t t t t (s) Time Velocity diagram 9 GET/MD/.

12 6. Calculation of the Equivalent Load The linear guideway system can take up loads and moments in all four directions those are radial load, reverseradial load, and lateral load simultaneously. When more than one load is exerted on linear guideway system simultaneously, all loads could be converted into radial or lateral equivalent load for calculating service life and static safety factor. MSA and MSB series guideway has fourway equal load design. The calculation of equivalent load for the use of two or more linear guideways is shown as below. E = R + T R E Equivalent load (N) T R T Radial or reverseradial load (N) Lateral load (N) For the case of mono rail, the moment effect should be considered. The equation is: M = R + T + C. E M R MR E R T C M Calculated moment (N m) M R Equivalent load(n) Radial or reverseradial load(n) Lateral load (N) Basic static load rating (N) ermissible static moment (N m) R T 7. The Calculation of the Mean Load When a linear guideway system receives varying loads, the service life could be calculated in consideration of varying loads of the hostsystem operation conditions. The mean load (m) is the load that the service life is equivalent to the system which under the varying load conditions. If the rolling elements are balls, the equation of mean load is: m = n Σ (n L n L.. ) n= m n L Total running distance (mm) L n Mean load (N) Varying load (N) Running distance under load n (mm) GET/MD/.

13 Examples for calculating mean load Types of Varying Load Calculation of Mean Load m m =. L +. L ( n Ln ) L Loads that change stepwise Load () n m n Mean load (N) Varying load (N) L Total running distance (mm) L L Ln L n Running distance under load n (mm) Total running distance L Loads that change monotonously Load () min m max m min max = ~ ( +. min max ) m Mean load (N) Minimum load (N) Maximum load (N) Total running distance L max = ~.6. m max Load () m m max Mean load (N) Maximum load (N) Loads that change sinusoidally Total running distance L max = ~.7. m max m m Mean load (N) Load () max Maximum load (N) Total running distance L GET/MD/.

14 8. Calculation Example Operation conditions Model : MSALASSFC + R/ II Basic dynamic load rating C =.8 kn Basic static load rating C = 8.8 kn Mass m = 7 kg m = 4 kg Velocity V =.7 m/s Time t =. s t =.9 s t =. s Acceleration a = m/s a = m/s Stroke Distance l s = mm l = 6 mm l = 4 mm l = mm l 4 = 6 mm l = 7 mm l 6 = 4 mm mg l6 l Left mg V (m/s) No. l4 l No. l l t t t X X X ls t (s) (mm) (mm) No.4 Velocity diagram Calculate the load that each carriage exerts Uniform motion, Radial load n mg mg. l mg. l4 m g = l l 4 = 6.4 N mg mg. l mg. l4 m g = l l 4 = 987. N During acceleration to the left, Radial load n la m. l m. l l 6 la = l = 77 N m. l m. l l 6 la = + + l = 86.6 N mg mg. l mg. l4 m g = l l 4 = 7.6 N mg mg. l mg. l4 m g 4 = + 4 l l 4 = N 6 la = + + l = 7 N m. l6 m. l 4la = 4 l l = 49.6 N m. l m. l l GET/MD/.

15 Lateral load t n la m. l t la = l 4 = N m. l t la = l 4 = N t la = m. l l 4 = N t la = 4 m. l4 l = N During deceleration to the left, Radial load n la m. l m. l l 6 la = + + l = 94. N = 69.8 N m. l m. l l 6 la= l 6 la = l 6 4la = l = 67.4 N = 7.6 N m. l m. l l m. l m. l l Lateral load t n la m. l4 t la = l m. l4 t la = l = 6. N = 6. N m. l4 t la = = 6. N l m. l4 t 4la = = 6. N l 4 During acceleration to the right, Radial load n ra m. l m. l l 6 ra= + + l 6 ra= l = 67.8 N = 66.8 N m. m. l6 m. l6 m. l l ra = 4ra = l l l l =. N = 787. N Lateral load t n ra m. l m. l l m. l t ra = l m. l t ra = l 4 = N 4 = N m. l t ra = l m a t 4ra.. = l l 4 4 = N = N During deceleration to the right, Radial load n ra 6 ra = l = 8.6 N = 67 N m. l m. l l m. l m. l l 6 ra= + + l 6 ra= + + l = 44.4 N = 68 N m. l m. l l m. l m. l l 6 4ra= 4 l GET/MD/.

16 Lateral load t n ra m. l t ra = l 4 = 6. N t ra = m. l l 4 = 6. N t ra = m. l l 4 = 6. N m. l4 t 4ra = l = 6. N Calculate equivalent load In uniform motion E = = E = = 6.4 N 987. N E = = E 4 = 4 = 7.6 N N During acceleration to the left E = + = la la tla 6.6 N E la = la + tla = N E la = la + tla = 86. N E 4la = 4 la + t4la = 976. N During deceleration to the left E la la tla = + = 4.7 N E la la tla = + = 84. N = + = N E la la tla = + = 89. N E 4la 4 la t4la 4 During acceleration to the right E ra = la + tla = N E ra = la + tla = 66.8 N E ra = la + tla =.4 N E 4ra = 4 la + t4la = 67.8 N During deceleration to the right E ra la tla = + = 44. N E ra la tla = + = 46.9 N = + = 8. N E ra la tla = + = 49. N E 4ra 4 la t4la Calculation of static factor From above, the maximum load is exerted on carriage No. when during acceleration of the nd linear guideway to the left. O 8.8 fs = 9. C la = = 86. E GET/MD/. 4

17 4 Calculate the mean load on each carriage mn = m ( l X +. X + l X + r X +. X + r X ) E E E l S E E E = 7.7 N = m ( l X +. X + l X + r X +. X + r X ) E E E l S E E E = 477. N = m ( l X +. X + l X + r X +. X + r X ) E E E l S E E E = 87.7 N = m4 ( l X +. X + l X + r X +. X + r X ) E 4 E 4 E 4 l S E 4 E 4 E 4 = 87.6 N Calculation of nominal life (Ln) Base on the equation of the nominal life, we assume the fw=. and the result is as below: ( ) C L= f = 986 km. W m ( ) C L 6 km = f W. = m ( ) C L= 87 km f W. = m ( ) C L 98 km 4= f. = W m4 From these calculations and under the operating conditions specified as above, the 87 km running distance as service life of carriage No. is obtained. GET/MD/.

18 9. Installation Direction of Linear Guideway The installation direction of linear guideway depends on machine structure and load direction. When oil lubrication is applied, the lubricant routing will be varied with different applications. Therefore, please specify the direction of installation when ordering. Horizontal (Code H) Vertical (Code V) Inverted (Code R) Opposed (Code F) Spacer Wall mounting (Code K) Tilted (Code T) GET/MD/. 6

19 . Fixing Methods of Linear Guideway The rail and carriage could be displaced when machine receives vibration or impact. Under such situation, the running accuracy and service life will be degraded, so the following fixing methods are recommended for avoiding such situation happens. Table Shoulder plates Shoulder plate(recommended) For this method, the rail and carriage should stick out slightly from the bed and table. To avoid interference from corner of carriage and rail, the shoulder plate should have a recess. Bed Table Taper gibs Taper gib A slight tightening of the taper gib could generate a large pressing force to the linear guideway, and this may cause the rail to deform. Thus, this method should be carried with caution. Bed Table ush screws ush screw Due to the limitation of installation space, the size of bolt should be thin. Bed Table Needle rollers Needle roller The needle roller is pressed by the taper section of the head of screw, so the position of screw should be paid attention. Bed. Installation of Linear Guideway. Installation of Linear Guideway When Machine Subjected to Vibration and Impact Table Bed Block push screw Rail push screw Subsidiary side Master side 7 GET/MD/.

20 () Installation of rail Oil stone. rior to installation, the burrs, dirt, and rust preventive oil should be removed thoroughly. Reference side. Gently place the linear guideway on the bed, and pushing it against the reference side of bed. Bolts. Check for correct bolt play and temporarily tighten all bolts. 4. Tighten the push screw in sequence to ensure the rail close matching the reference side of bed. ush screw Torque wrench. Tighten all bolts to the specified torque. The tightening sequence should start from the center to both ends. By doing this, the original accuracy could be achieved. 6. Follow the same procedure for the installation of remaining rails. GET/MD/. 8

21 () Installation of carriage 4 Table. Gently place table onto carriages and temporarily tighten the bolts.. Tighten the push screw to hold the master rail carriage against the table reference side, and position the table.. Fully tighten all bolts on both master and subsidiary sides. The tightening process should be followed by the order of to 4.. Installation of Linear Guideway without ush Screws Table ush screw Bed Subsidiary side Master side () Installation of master rail Using a vise First tighten the mounting bolts temporarily, than use a C vise to press the master rail to reference side. Tighten the mounting bolts in sequence to specified torque. () Installation of subsidiary rail Straight edge Using a straight edge lace a straight edge between the two rails and position it parallel to the reference side rail which is temporarily tightened by bolts. Check the parallelism with dial gauge, and align the rail if necessary. Then tighten the bolts in sequence. 9 GET/MD/.

22 Subsidiary side Master side Using a table Tighten two master side carriages and one subsidiary side carriage onto the table. Then temporarily tighten another subsidiary carriage and rail to the table and bed. osition a dial gauge on the table and have the probe of dial gauge contact the side of the subsidiary carriage. Move the table from the rail end and check the parallelism between the carriage and the subsidiary rail. Then tighten the bolts in sequence. Master side Compare to master rail side Tighten two master side carriages and one subsidiary side carriage onto the table. Then temporarily tighten another subsidiary carriage and rail to the table and bed. Move the table from one rail, check and align the parallelism of subsidiary rail based on moving resistance. Tighten the bolts in sequence. Subsidiary side Master side Subsidiary side Using a jig Using the special jig to align the parallelism between the reference side of master rail and that of subsidiary rail from one rail end to another. Tighten the mounting bolts in sequence. () The installation of carriage follows the example described previously.. The Installation of Carriage of Linear Guideway without the Reference Side for Master Rail Table ush screw Bed Subsidiary side Master side GET/MD/.

23 () Mounting the master rail Measuring plate Using a temporary reference side Two carriages are tightened together onto the measuring plate, and set up a temporary reference surface near the rail mounting surface on the bed. Check and align the parallelism of rails and then tighten bolts sequentially. Straight edge Using a straight edge At first temporarily tighten rail onto the bed, then use a dial gauge to align the straightness of rail. Tighten the bolts in sequence. () The installation of subsidiary carriage and rail is same as the prior examples..4 Accuracy Measurement after Installation The running accuracy can be obtained by tightening the two carriages onto the measuring plate. A dial gauge or autocollimeter is sued for measuring the accuracy. If a dial gauge is used, the straight edge should be placed as close to carriage as possible for accurate measurement. Measuring with an Autocollimeter Measuring with a Dial Gauge Straight edge GET/MD/.

24 . The Recommended Tightening Torque for Rails The improper tightening torque could affect the mounting accuracy, so tightening the bolts by torque wrench to specified toque is highly recommended. Different types of mounting surface should have different torque value for applications. Table Tightening torque value Unit N m Bolt Model Torque Value Iron Cast iron Aluminum M. M4 4.7 M M M8 M 68 4 M 78 8 M M M 8 9 * Nm =.78 lbfft. Marking on Master Linear Guideway and Combined Case. Recognizing of Reference Side The reference side of rail is assigned by the arrow sign which is marked together with the model code and lot number on top surface of rail while that of carriage is the side which is opposed to the side marked with lot number and model code marked, as shown on Fig.. Reference side Marking on Rail Accuracy grade MSAR S87 MR Lot No. Master rail Sequence No. Reference side Fig. Recognizing of reference side Marking on Carriage Accuracy grade MSAS S87 Lot No. Sequence No. GET/MD/.

25 . Recognizing of Master Rail Linear rails to be applied on the same plane are all marked with the same serial number, and "MR" is marked at the end of serial number for indicating the master rail, shown as Fig. 6. The reference side of carriage is the surface where is ground to a specified accuracy. For normal grade (N), it has no mark "MR" on rail which means any one of rails with same serial number could be the master rail. Fig. 6 Recognizing of master rail Master rail MSAR S87 MR Subsidiary rail MSAR S87. Combined Use of Rail and Carriage For combined use, the rail and carriage must have the same serial number. When reinstalling the carriage back to the rail, make sure they have the same serial number and the reference side of carriage should be in accordance with that of rail..4 For Buttjoint Rail When applied length of rail longer than specified max. length, the rails can be connected to one another. For this situation, the joint marks indicate the matching position, as shown in Fig. 7. Accuracy may deviate at joints when carriages pass the joint simultaneously. Therefore, the joints should be interlaced for avoiding such accuracy problem, as shown in Fig. 8. Fig. 7 Identification of buttjoint rail Joint mark Subsidiary rail S87 MSAR B B S87 MSAR A A S87 MSAR Reference side Master rail MSAR S87 MR A A MSAR S87 MR B B MSAR S87 MR Fig. 8 Staggering the joint position Interlacing the joint positions / / GET/MD/.

26 . The Relationship between the Direction of Lubrication and the Reference Side The standard lubrication fitting is grease nipple (GM6 GT/8 GM4). The code of different types of application for lubrication fittings are shown in Table 4. For cases other than specified, please contact us for confirmation. Table 4 The relationship between the direction of lubrication and the reference side Code: CR Code: CR Reference side Reference side Subsidiary rail Reference side Reference side Master rail Code: CR Code: CR Reference side Reference side Subsidiary rail Reference side Reference side Master rail Code: CR Code: CR Reference side Reference side Subsidiary rail Master rail Reference side Reference side Code: C4R Code: C4R Reference side Reference side Subsidiary rail Master rail Reference side Reference side GET/MD/. 4

27 4. Accuracy Standard The accuracy of linear guideway includes the dimensional tolerance of height, width, and the running accuracy of the carriage on the rail. The standard of the dimension difference is built for two or more carriages on a rail or a number of rails are used on the same plane. The accuracy of linear guideway is divided into classes, normal grade (N), high precision (H), precision (), super precision (S), and ultra precision (U), as shown in Table or 9. Running parallelism The running accuracy is the deviation of parallelism between the reference surface of carriage and reference surface of rail when carriage moving over the entire length of rail. H W Fig. 9 Measuring the running parallelism Height difference ( H) The height difference ( H) means the height difference among carriages installed on the same plane. Width difference ( W) The width difference ( W) means the width difference among carriages installed on a rail. Additional remarks. When two or more linear guideways are used on the same plane, the tolerance of W and difference of W is applicable to master rail only.. The accuracy is measured at the center or central area of carriage. GET/MD/.

28 . The Selection of Accuracy Grade The accuracy grade for different applications shown as Table. Table Accuracy grade for various applications Application Accuracy Grade Accuracy Grade Application N H S U N H S U Machining center Lathe Milling machine Boring machine Jig borer Grinding machine Industrial Robot Semiconductor Manufacturing Cartesian coordinate robot Cylindrical coordinate robot Wire bonder rober Electroniccomponent inserter rintedcircuitboard drilling machine Machine Tool Electric discharge machine unching press Laserbeam machine Woodworking machine Injectionmolding machine D measuring instrument Office equipment Transfer equipment NC drilling machine Tapping center Others XY table ainting machine allet changer Welding machine ATC Medical equipment Wire cutter Digitizer Dresser Inspection equipment GET/MD/. 6

29 6. reload and Rigidity The rigidity of a linear guideway could be enhanced by increasing the preload. As shown in Fig., the load could be raised up to.8 times the preload applied. The preload is represented by negative clearance resulting from the increase of ball diameter. Therefore, the preload should be considered in calculation service life. Light preload (FC) Deformation ( ) Medium preload (F) Heavy preload (F) : reload.8 Load Fig. Rigidity 7. The Selection of reload Selecting proper preload from Table 6 to adapt the specific application and condition. Table 6 reload grade for various applications reload Operating Condition Major Application Light preload (FC) The loading direction is fixed, vibration and impact are light, and two axes are applied in parallel. High precision is not required, and the low frictional resistance is needed. Welding machine, binding machine, auto packing machine, x, y axis of ordinary industrial machine, material handling equipments. Medium preload (F) Overhang application with a moment load. Applied in oneaxis configuration The need of light preload and high precision. Z axis of industrial machines, EDM, precision x y table, C board drilling machine, industrial robot, NC lathe, measuring equipment, grinding machine, auto painting machine. Heavy preload (F) Machine is subjected to vibration and impact, and high rigidity required. Application of heavy load or heavy cutting. Machine center, NC lathe, grinding machine, milling machine, Z axis of boring machine and machine tools. 8. Lubrication A well lubrication is important for maintaining the function of linear guideway. If the lubrication is not sufficient, the frictional resistance at rolling area will increase and the service life will be shortened as a result of wear of rolling parts. Two primary lubricants are both grease and oil used for linear motion system, and the lubrication methods are categorized into manual and forced oiling. The selection of lubricant and its method should be based on the consideration of operating speed and environment requirement. 7 GET/MD/.

30 () Grease lubrication The grease feeding interval will be varied with different operating conditions and environments. Under normal operating condition, the grease should be replenished every km of travel. The amount of grease for each type of carriage is shown as Table 7. The standard grease for the MSA and MSB series is lithiumbased grease No.. Table 7 Grease amount to be fed Initial Feeding Amount (cm ) Amount for Replenishing (cm ) Initial Feeding Amount (cm ) Amount for Replenishing (cm ) MSA.4 ( x )*.4 MSB.4 ( x )*.4 MSA.8 ( x )*.8 MSB. ( x )*. MSA. ( x )*. MSB.8 ( x )*.8 MSA.6 ( x )*.6 MSB. ( x )*. MSA. ( x )*. MSB. ( x )*. MSA 4 4. ( x )* 4. MSA 7.8 ( x )* 7.8 MSA 6 6 ( x )* 6 The recommended initial feeding amount of grease is times of the listed feeding amount. Moving the carriage back and forth with minimum stroke length of length of carriages after the carriages been greased. To assure the grease is evenly distributed inside of carriage, the mentioned process should be repeated twice at least. () Oil lubrication The recommended viscosity of oil is ~ cst, and the recommended feeding rate per hour is shown as Table 8. The installation other than horizontal may caused the oil unable to reach raceway area, so please specify the installed direction your linear guideway applied. Reference is shown in age 6. Table 8 Oil lubrication feeding rate Initial Feeding Amount (cm ) Feeding Rate (cm /hr) Initial Feeding Amount (cm ) Feeding Rate (cm /hr) MSA.. MSB.. MSA.4. MSB.. MSA.. MSB.. MSA.8. MSB.6. MSA.. MSB.. MSA 4..4 MSA.6. MSA Note: When the operating stroke length less than the sum of length of two carriages, the lubrication fitting should be applied on both ends of carriage for adequacy. Moreover, if the stroke length less than a half of the length of a carriage, the carriage should be moved back and forth up to the length of two carriages while lubricating. GET/MD/. 8

31 () Types of grease nipple and piping joint are shown as below: Grease nipple GM6 GSM6 GT/8 GST/8 GM M6x.7 M6x.7 8. T/8 8. T/8 M4x.7 Oil piping joint OL type OLA OLB OLC OLD OLE T/8 M8x 8 T/8 M8x 8 M6x M6x.7 6. M6x.7 8 T/8 8 T/8 4. M4x.7 OS type OSA OSB OSC OSD T/8 M8x T/8 M8x M6x.7 M6x.7 T/8 T/8 Grease Nipple iping Joint Standard Option Option MSA MSB GM4 OLE MSA MSB MSA MSB GM6 GSM6 OLA OLB OSA OSB MSA MSB MSA MSB MSA 4 MSA MSA 6 GT/8 GST/8 OLC OLD OSC OSD 9 GET/MD/.

32 (4) Lubrication position The standard mounting locating of carriage is at the center of both ends, see Fig.. As for lateral application, please specify when ordering. As shown as Fig., the lateral application is achieved by using a adapter to connect the grease/oil fitting to the hole on the carriage. Fig. Lubrication location Fig. Lateral usage Adapter ( TSA ) OSB OSA GSM6 GSM6 OSA OSB Adapter ( TSA ) 9. lastic Caps for rail mounting hole A special designed of cap is used to cover the bolt hole to prevent the foreign matters from entering the carriage. The cap is mounted by using a plastic hammer with a flat pad placed on the top, until the top of cap is flush to the top surface of rail. See Fig.. The dimension of caps for different sizes of rail is shown as Table 9. D h lastic hammer Flat pad Fig. lastic cap for rail mounting hole Installation method Table 9 Dimensions of plastic caps Code of Cap Bolt Size D(mm) h(mm) Rail Model MC M 6.. MSBR M4C M MSAR MSBU MC M 9.8. MSAR MSBR M6C M8C M6 M MSAR MSAR MSAR MSBR MSBR MSBR MC M MSA4R M4C M4.4 MSAR M6C M6 6.4 MSA6R GET/MD/.

33 . Construction and Characteristics of MSA and MSB Series Construction Upper Retainer Carriage End Cap End Seal Rail Grease Nipple Ball Lower Retainer Bottom Seal 4 4 Characteristics The trains of balls are designed to a contact angle of 4 which enables it to bear an equal load in radial, reversed radial and lateral directions. Therefore, it can be applied in any installation direction. Furthermore, MSA and MSB series can achieve a well balanced preload for increasing rigidity in four directions while keeping a low frictional resistance. This is especially suit to high precision and high rigidity required motion. The patent design of lubrication route makes the lubricant evenly distribute in each circulation loop. Therefore, the optimum lubrication can be achieved in any installation direction, and this promotes the performance in running accuracy, service life, and reliability. High Rigidity, Fourway Equal Load The four trains of balls are allocated to a circular contact angle at 4, thus each train of balls can take up an equal rated load in all four directions. Moreover, a sufficient preload can be achieved to increase rigidity, and this makes it suitable for any kind of installation. Self Alignment Capability The self adjustment is performed spontaneously as the design of facetoface (DF) circular arc groove. Therefore, the installation error could be compensated even under a preload, and which results in precise and smooth linear motion. Smooth Movement with Low Noise The simplified design of circulating system with strengthened synthetic resin accessories makes the movement smooth and quiet. Interchangeability For interchangeable type of linear guideway, the dimensional tolerances are strictly maintained within a reasonable range, and this has made the random matching of the same size of rails and carriages possible. Therefore, the similar preload and accuracy can be obtained even under the random matching condition, As a result of this advantage, the linear guideway can be stocked as standard parts, the installation and maintenance become more convenient. Moreover, this is also beneficial for shortening the delivery time. GET/MD/.

34 . MSA Series Heavy Load Type. Carriage Type Heavy Load MSAA Type MSAE Type MSAS Type Installed from top side of carriage with the thread length longer than MSAE type. This type offers the installation either from top or bottom side of carriage. Square type with smaller width and can be installed from top side of carriage. Ultra Heavy Load MSALA Type MSALE Type MSALS Type All dimensions are same as MSAA except the length is longer, which makes it more rigid. All dimensions are same as MSAE except the length is longer, which makes it more rigid. All dimensions are same as MSAS except the length is longer, which makes it more rigid.. Rail Type Counterbore (R type) Tapped Hole (T type) GET/MD/.

35 . Description of Specification () NonInterchangeable Type MSA A SS F A + R / 4 A II Series MSA Size,,,,, 4,, 6 Carriage type () Heavy load A : Flange type, mounting from top E : Flange type, mounting either from top or bottom S : Square type () Ultra heavy load LA : Flange type, mounting from top LE : Flange type, mounting either from top or bottom LS : Square type Number of carriages per rail,,... Dust protection option No symbol, UU, SS, ZZ, DD, KK, LL, RR reload FC (Light preload), F (Medium preload), F (Heavy preload) Code of special carriage No symbol, A, B... Rail type R (Counterbore type), T (Tapped hole type) Rail length (mm) Rail hole pitch from start side (E, see Fig.4) Rail hole pitch to the end side (E, see Fig.4) Accuracy grade N, H,, S, U Code of special rail No symbol, A, B... Number of rails per axis No symbol, II, III, IV... Fig.4 Subsidiary rail Reference side Reference side E E Master rail GET/MD/.

36 () Interchangeable Type Code of Carriage MSA A SS FC N A Series MSA Size,,,,, 4,, 6 Carriage type () Heavy load A : Flange type, mounting from top E : Flange type, mounting either from top or bottom S : Square type () Ultra heavy load LA : Flange type, mounting from top LE : Flange type, mounting either from top or bottom LS : Square type Dust protection option No symbol, UU, SS, ZZ, DD, KK, LL, RR reload FC (Light preload) Accuracy grade N, H Code of special carriage No symbol, A, B... Code of Rail MSA R / 4 N A Series MSA Size,,,,, 4,, 6 Rail Type R (Counterbore type), T (Tapped hole type) Rail length (mm) Rail hole pitch from start side (E, see Fig.4) Rail hole pitch to the end side E, see Fig.4) Accuracy grade N, H Code of special rail No symbol, A, B... GET/MD/. 4

37 .4 Accuracy Grade The accuracy of MSA series is divided into classes, normal grade (N), high precision (H), precision (), super precision (S), and ultra precision (U), as shown in Table. Table Accuracy Grade Unit : mm Accuracy Grade Item Normal N High H recision Super recision S Ultra recision U Tolerance for height H Height difference H MSA Tolerance for distance W MSA Difference in distance W ( W) Running parallelism of surface C with surface A C (see Fig.) Running parallelism of surface D with surface B D (see Fig.) Tolerance for height H MSA MSA Height difference H Tolerance for distance W MSA Difference in distance W ( W) Running parallelism of surface C with surface A C (see Fig.) Running parallelism of surface D with surface B D (see Fig.) Tolerance for height H..... Height difference H MSA 4 Tolerance for distance W..... MSA Difference in distance W ( W) Running parallelism of surface C with surface A C (see Fig.) Running parallelism of surface D with surface B D (see Fig.) Tolerance for height H Height difference H MSA 6 Tolerance for distance W Difference in distance W ( W) Running parallelism of surface C with surface A C (see Fig.) Running parallelism of surface D with surface B D (see Fig.) Fig. Running arallelism of Carriage Running parallelism C, D (µm) 4 Normal (N) C High (H) D B recision () H Super recision (S) Ultra recision (U) 4 A D C A W B Rail length (mm) GET/MD/.

38 . reload Grade and Rigidity () reload grade The preload of MSA series is represented by radial clearance which is divided into three grades, light (FC), medium (F), heavy (F), as shown in Table. Table reload grade and radial clearance Unit µm reload Light Medium Heavy FC F F MSA 4 ~ + ~ 4 MSA ~ + 4 ~ ~ 4 MSA 6 ~ + 6 ~ 6 6 ~ 6 MSA 7 ~ +4 9 ~ 7 ~ 9 MSA 8 ~ +4 ~ 8 ~ MSA 4 ~ + ~ 4 ~ MSA ~ + 9 ~ 46 ~ 9 MSA 6 4 ~ +7 ~ 4 ~ () Rigidity value The rigidity values of preloaded linear guideway of MSA series are shown as Table. Table Rigidity value Heavy Load Type Ultra Heavy Load Type MSA A, E, S MSA A, E, S MSA A, E, S MSA A, E, S MSA A, E, S MSA4 A, E, S MSA E, S MSA6 E, S MSA LA, LE, LS MSA LA, LE, LS MSA LA, LE, LS MSA LA, LE, LS MSA4 LA, LE, LS MSA LE, LS MSA6 LE, LS Rigidity Value ( N/µm ) Light preload Medium preload Heavy preload FC F F GET/MD/. 6

39 .6 Dust roof () Contamination protection MSA series of linear guideway offers various kinds of dust protection accessory to keep the foreign matters from entering into the carriage. End seal Tow types sealing are available:. Bidirectional seal for high dust protection required.. Monodirectional seal for low frictional resistance required. Bottom seal reventing the inclusion of foreign matters from bottom of carriage. End seal Bottom seal Double end seal For enhancing the dust protection. Metallic scraper Removing spatters, iron chips, and large foreign matters as well as protecting the end seals. End seal End seal Metal Scraper End seal Washer Washer Washer Washer () Code of contamination protection The codes for selection of dust protection accessory are shown as Table. The increment to be added to the length of carriage with different applications of dust protection accessory is shown as Table 4. Table Code of contamination protection Code No symbol UU SS ZZ DD KK LL RR Contamination rotection Scraper (both ends) Bidirectional end seal (both ends) Bidirectional end seal + Bottom seal SS + Scraper Double bidirectional end seal + Bottom seal DD + Scraper Low frictional end seal LL + Bottom seal 7 GET/MD/.

40 Table 4 Types of seal to the increment to the carriage overall length No symbol UU SS LL RR ZZ DD MSA 6 Unit mm KK MSA MSA MSA MSA MSA MSA MSA () Resistance value of seal The maximum resistance value of seals type UU when it is applied with grease is shown as Table. Table Seal resistance value Unit N MSA MSA MSA MSA MSA MSA 4 MSA MSA 6 Resistance The Shoulder Height and Corner Radius for Installation The mounting surface of rails and carriages are machined precisely for aiding in positioning and assemble with high accuracy. The shoulder height and corner radius providing enough mounting space for not to interfere with chamfers made on rails and carriages. The dimensions of shoulder height and corner radius are shown as Table 6. Table 6 Shoulder height and corner radius of mounting surface Unit mm r MSA r (max.). r (max.). h h 4 H 4. h MSA... MSA 6. MSA 8 h H MSA r MSA MSA.. MSA 6.. GET/MD/. 8

41 .8 Dimensional Tolerance of Mounting Surface Thanks to the self alignment capability of MSA series, the minor dimensional error in mounting surface could be compensated and achieves smooth linear motion. The tolerances of parallelism between two axes are shown as below. The parallel deviation between two axes (e) Table 7 arallel deviation (e) Unit µm FC reload Grade F F e MSA 8 MSA 8 MSA MSA 4 7 MSA MSA MSA 7 4 MSA Level difference between two axes (e) e Table 8 Level difference between two axes (e) MSA MSA MSA MSA MSA MSA 4 MSA MSA 6 FC 7 reload Grade F Unit µm F Note: The permissible values in table are applicable when the span is mm wide..9 Tappedhole Rail Dimensions h S E E L Rail Size MSA T MSA T MSA T MSA T MSA T MSA 4 T MSA T MSA 6 T S M M6 M6 M8 M8 M M4 M h(mm) GET/MD/.

42 GET/MD/. 4. Rail Standard and Maximum Length L E E Unit mm Rail Standard Length (L ) MSA MSA MSA MSA MSA MSA MSA MSA Standard itch () Standard E Minimum E Max. Length L

43 . Dimensions of MSAA / MSALA M W 4Sx l B T T MY H H W W MR (G) L 4 d K L C D N h H d E MSA A MSA LA MSA A MSA LA MSA A MSA LA MSA 4 A MSA 4 LA M8x Mx Mx Mx Unit mm External dimension Carriage dimension Height Width Length W H W L H B C Sxl L T T N G K d Grease Nipple MSA A Mx GM4 MSA A M6x 7.8. GM6 MSA LA GM GM GM6..6. GT/8 MSA A MSA A MSA LA MSA A MSA LA MSA A MSA LA MSA A MSA LA Rail dimension Basic load rating Static moment rating Weight Width Height itch E Dynamic C Static C D x h x d M M Y M R Carriage Rail W H std. kn kn knm knm knm kg kg/m 6 7. x. x x 8. x x 9 x x x x x MSA 4 A MSA 4 LA 4 8. x 7 x Note: Request for size and 6 MSAA / MSALA carriage, please refer to MSAE / MSALE carriage type. 4 GET/MD/.