MYHT Series High Rigidity/ High Precision Guide Type ø, ø6 The use of two linear guides allows a maximum load of kg. (ø6) Rodless cylinder MYBH SMC 2 linear guides Easy maintenance is stressed by a revolutionary construction which allows cylinder replacement without disturbing the guide units or work piece. 77
Before Operating Maximum llowable Moment/Maximum llowable oad Model MYHT (mm) 6 Max. allowable moment (N m) Max. allowable load (kg) M₁ M₂ M₃ m₁ m₂ m₃ 2 80 2 0 2 0 The above values are the maximum allowable values for moment and load. Refer to each graph regarding the maximum allowable moment and maximum allowable load for a particular piston speed. Maximum allowable moment Select the moment from within the range of operating limits shown in the graphs. Note that the maximum allowable load value may sometimes be exceeded even within the operating limits shown in the graphs. Therefore, also check the allowable load for the selected conditions. oad (kg) W Moment (N m) W₂ m₂ W₃ F M₁ = F₁ x ₁ F2 M₂ = F₂ x ₂ F M₃ = F₃ x ₃ 2 <Calculation of guide load factor>. Maximum allowable load (), static moment (2), and dynamic moment (at the time of impact with stopper) () must be examined for the selection calculations. To evaluate, use υa (average speed) for () and (2), and υ (impact speed υ =.4υa) for (). Calculate m max for () from the maximum allowable load graph (m₁, m₂, m₃) and Mmax for (2) and () from the maximum allowable moment graph (M₁, M₂, M₃). Sum of guide load factors 2. Reference formulae [Dynamic moment at impact] Use the following formulae to calculate dynamic moment when taking stopper impact into consideration. m F : oad mass (kg) : oad (N) oad mass [m] Note ) Static moment [M] Dynamic moment [ME] Σα = + + Note 2) Maximum allowable load [m max] llowable static moment [Mmax] FE : oad equivalent to impact (at impact with stopper) (N) ME: Dynamic moment (N m) υa: verage speed (mm/s) g : Gravitational acceleration (9.8m/s²) M : Static moment (N m) Note 4) υ.4 υ =.4υa (mm/s) FE = υa g m m FE Note 5) ME = FE ₁ = 0.05υa m ₁ (N m) ME Note 4).4 υa is a dimensionless coefficient for calculating impact force. Note 5) verage load coefficient (= ): This coefficient is for averaging the maximum load moment at the time of stopper impact according to service life calculations. υ ₁ llowable dynamic moment [MEmax] Note ) Moment caused by the load, etc., with cylinder in resting condition. Note 2) Moment caused by the impact load equivalent at the stroke end (at the time of impact with stopper). Note ) Depending on the shape of the work piece, multiple moments may occur. When this happens, the sum of the load factors (Σα) is the total of all such moments. : Impact speed (mm/s) : Distance to the load's center of gravity (m) Maximum allowable load Select the load from within the range of limits shown in the graphs. Note that the maximum allowable moment value may sometimes be exceeded even within the operating limits shown in the graphs. Therefore, also check the allowable moment for the selected conditions.. Refer to pages 80 and 8 for detailed selection procedures. 78
Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type MYHT/M₁ 0 MYHT/M₂ 0 MYHT/M₃ 0 0 0 0 Moment N m MYHT Moment N m MYHT Moment N m MYHT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MYHT/m₁ 0 0 MYHT/m₂ 0 0 MYHT/m₃ 0 0 oad weight kg MYHT oad weight kg oad weight kg MYHT MYHT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 79
Model Selection The following are steps for selection of the series MY best suited to your application. Calculation of Guide oad Factor Operating conditions Cylinder... MYHT-600 verage operating speed υa 700mm/s Mounting orientation... Vertical mounting MYHT-600 Mounting orientation 2. Wall mounting P. 58. Horizontal mounting y P. 26 z Wd: Work piece (0g) x y x z 4. Vertical mounting Wc: MH2-6D (795g) Wa: Connection plate t = 0 (880g). Ceiling mounting P. 42 x Wb: MGGB25-0 (4.5kg) x z y z y 2 oad blocking Composite center of gravity calculation m₄ = Σmn = 0.88 + 4.5 + 0.795 + 0.5 = 6.525kg X = x Σ (mn m₄ x xn) = (0.88 x 65 + 4.5 x + 0.795 x + 0.5 x ) = 8.5mm 6.525 Y = x Σ (mn x yn) m₄ = (0.88 x 0 + 4.5 x 0 + 0.795 x + 0.5 x ) = 29.6mm 6.525 Z = x Σ (mn m₄ x zn) = (0.88 x 5 + 4.5 x 42.5 + 0.795 x 42.5 + 0.5 x 42.5) = 7.4mm 6.525 4 Calculation of load factor for static load 80 m₄: Mass Y Z Y X 5 65 42.5 m₄ is the mass which can be transferred by the thrust, and as a rule, is actually. about 0. to 0.7 of the thrust. (This differs depending on the operating speed.) Refer to the pages above for actual examples of calculation for each orientation. Mass and center of gravity for each work piece Work piece Center of gravity no. Mass X-axis Y-axis Z-axis Wn m Xn Yn Zn Wa Wb Wc Wd 0.88kg 4.5kg 0.795kg 0.5kg 65mm mm mm mm 0mm 0mm mm mm 5mm 42.5mm 42.5mm 42.5mm n = a, b, c, d M₁: Moment m₄ M₁ M₁ max (from of graph MYMHT/M₁) = 60 (N m).. M₁ = m₄ x g x Z = 6.525 x 9.8 x 7.4 x 0 - ³ = 2.9 (N m) m₄ oad factor α₁ = M₂/M₂ max = 2.9/60 = 0.04 Z
Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type M₃: Moment M₃ max (from 2 of graph MYHT/M₃) = 60 (N m) M₃ = m₄ x g x Y = 6.525 x 9.8 x 29.6 x 0 - ³ =.89 (N m) oad factor α₂ = M₃/M₃ max =.89/60 = 0.0 M Y m4 5 Calculation of load factor for dynamic moment Equivalent load at impact FE.4 FE = x υa x g x m =.4 x 700 x 9.8 x 6.525 = 626.7 (N) M₁E: Moment M₁E max (from of graph MYHT/M₁ where.4υa = 980mm/s) = 42.9 (N m) M₁E = x FE x Z = x 626.7 x 7.4 x 0 - ³ = 7.82 (N m) oad factor α₃ = M₁E/M₁E max = 7.82/42.9 = 0.8 M₃E: Moment M₃E max (from 4 of graph MYHT/M₃ where.4υa = 980mm/s) = 42.9 (N m) M₃E = x FE x Y = x 626.7 x 29.6 x 0 - ³ = 6.9 (N m) oad factor α₄ = M₃E/M₃E max = 6.9/42.9 = 0.4 M FE ME Y FE M ME 5 Sum and examination of guide load factors Σα = α₁ + α₂ + α₃ + α₄ = 0.9 The above calculation is within the allowable value and the selected model can be used. Select a separate shock absorber. In an actual calculation, when the sum of guide load factors Σα in the formula above is more than, consider decreasing the speed, increasing the bore size, or changing the product series. lso, this calculation can be performed easily with the "P/ Pneumatics CD System". llowable moment MYHT/m₁ 0 MYHT/M₃ 0 0 0 Moment N m MYHT Moment N m MYHT 0 0 0 0 0 0 0 0 0 0 8
Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type/ø, ø6 How to Order High Rigidity High Precision Guide Type MYHT 0 Z7 High rigidity/high precision guide type (2 linear guides) Cylinder bore size 6 mm 6mm Number of auto switches Nil S n 2 pcs. pc. "n" pcs. Nil G Piping Standard type Centralized piping type uto switch type Nil Without auto switch Refer to the table below for auto switch model numbers. Options Stroke adjusting unit numbers (mm) 6 Unit type MYT- MYT-6 Side support numbers Type (mm) Side support Side support B 6 MY-S6 MY-S6B Refer to page 88 for detailed information on dimensions, etc. Stroke Refer to the standard stroke table. Stroke adjusting unit H H One shock absorber at each stroke end Two shock absorbers at each stroke end One shock absorber at one end, two shock absorbers at one end Refer to pages 9 through 0 for detailed auto pplicable auto switches/ switch specifications. Type Reed switch Solid state switch Special function Electrical entry Indicator light Wiring (output) oad voltage Grommet wire (NPN equiv.) 5V Yes 2V V 2 wire 24V No 5V, 2V V or less wire (NPN) wire (PNP) 5V, 2V Grommet 2 wire 2V Yes 24V Diagnostic wire (NPN) Indication 5V, 2V (2 color wire (PNP) indicator) 2 wire 2V ead wire length symbols: 0.5m Nil (Example) Y59 m... Y59 5m... Z Y59Z Solid state switches marked with a "" symbol are produced upon receipt of order. Note) Separate switch spacers (MB-2-6-89) are required for retrofitting of auto switches. DC C uto switch models Electrical entry direction Perpendicular Y69 Y7PV Y69B Y7NWV Y7PWV Y7BWV In-line Z76 Z7 Z80 Y59 Y7P Y59B Y7NW Y7PW Y7BW ead wire length (m) 0.5 (Nil) () 5 (Z) pplicable load IC circuit IC circuit IC circuit IC circuit Relay, PC Relay, PC 82
Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type Specifications Symbol (mm) 6 Fluid ction Operating pressure range Proof pressure mbient and fluid temperature Piston speed Cushion ubrication ir Double acting 0. to 0.8MPa.2MPa 5 to 60 C to 0mm/s Double side shock absorber (standard) Non-lube Stroke length tolerance 2700 or less +.8 0, 270 to 00 +2.8 0 Port size Side port Rc /8 Note) Use at a speed within the absorption capacity. Refer to page 84. Stroke djusting Unit Specifications pplicable bore size (mm) Unit symbol, contents Stroke fine adjusting range (mm) Stroke adjusting range RB5 and adjusting bolt: set each 6 H RB5 and adjusting bolt: 2 sets each RB2725 and adjusting bolt: set each 0 to 60 0 to 85 Refer to page 85 for adjustment method. H RB2725 and adjusting bolt: 2 sets each Shock absorber model Max. energy absorption (J) Stroke absorption (mm) Max. impact speed (mm/s) Max. operating frequency (cycles/min) RB5 x pc. RB5 x 2 pcs. RB2725 x pc. RB2725 x 2 pcs. 58.8 5 88.2 5 47 25 2.5 25 0 0 Spring force (N) Extended Compressed 8.4. 6.68 4.00 Operating temperature range ( C) Note) Maximum energy absorption for 2 pcs. is calculated by multiplying the value for pc. by.5. Theoretical Output Bore size (mm) 6 Order Made Unit: N Piston Operating pressure (MPa) area (mm²) 0.2 0. 0.4 0.5 0.6 0.7 0.8 962 92 588 784 98 77 7 569 5 62 94 246 557 869 280 2492 N = pprox. 0.02kgf, MPa = pprox.0.2kgf/cm² Note) Theoretical output (N) = Pressure (MPa) x Piston area (mm²) Order made specifications Refer to page 05 regarding order made specifications for series MYH. 25 25 Standard Strokes 5 to 60 0 8.8.0 0 7.66.02 (mm) Standard stroke (mm) Max. manufacturable stroke (mm), 6 0, 0, 600, 800, 0, 0, 00 00 Note) Strokes other than standard are produced after receipt of order. Weights (mm) Basic weight dditional weight per 25mm of stroke Side support weight (per set) 6.62 4.69 0.87. 0.7 0.7 Calculation method Example: MYHT-0 Basic weight.62kg dditional weight 0.87/25mm stroke unit weight 0.62kg 0.62.08 Stroke adjusting unit weight Type and B unit H unit H unit 0.9.62.24 2.6 Unit: kg Cylinder stroke 0mm.62 + 0.87 x 0 25 + 0.62 x 2 = approx. 45.8 8
Cushion Capacity Cushion Selection <Stroke adjusting unit with built-in shock absorber> unit Use this unit when cushioning is necessary outside the air cushion stroke range even if the load and speed are within the air cushion limit line, or when the cylinder is operated in a load and speed range above the air cushion limit line and below the unit limit line. H unit Use this unit when the cylinder is operated in a load and speed range above the unit limit line and below the H unit limit line. Stroke djusting Unit bsorption Capacity MYHT Impact speed mm/s 00 0 0 0 0 0 0 0 0 oad weight kg Impact speed mm/s 00 0 0 0 0 0 Horizontal impact: P = 0.5MPa 0 0 00 oad weight kg Specific Product Precautions Calculation of absorbed energy for stroke adjusting unit with built-in shock absorber Unit: N m Vertical Horizontal Vertical (downward) (upward) Type of impact Kinetic energy E₁ Thrust energy E₂ bsorbed energy E Be sure to read before handling. Refer to pages 07 through 4 for safety instructions and common precautions. H unit unit Horizontal impact: P = 0.5MPa unit Stopper Bolt Holding Screw Tightening Torque Stopper bolt holding screw tightening torque Unit: N m (mm) Tightening torque 0.6 6.5 υ m F s s υ m s s υ m m υ² 2 F s + m g s F s m g s E₁ + E₂ Symbols υ: Speed of impacting object (m/s) m: Weight of impacting object (kg) F: Cylinder thrust (N) g: Gravitational acceleration (9.8m/s²) s: Shock absorber stroke (m) Note) The speed of the impacting object is measured at the time of impact with the shock absorber. Mounting. Do not apply strong impact or excessive moment to the slide table (slider). Since the slide table (slider) is supported by precision bearings, do not subject it to strong impact or excessive moment when mounting work pieces. 2. Perform careful alignment when connecting to a load which has an external guide mechanism. Mechanically jointed rodless cylinders can be used with a direct load within the allowable range for each type of guide, but careful alignment is necessary for connection to a load which has an external guide mechanism. Since fluctuation of the center axis increases as the stroke becomes longer, use a method of connection which can absorb the variations (floating mechanism).. Do not put hands or fingers inside when the body is suspended. Since the body is heavy, use eye bolts when suspending it. (The eye bolts are not included with the body.) 2. ir leakage will result from negative pressure. Under operating conditions which create negative pressure inside the cylinder due to external forces or inertial forces, note that air leakage may occur due to separation of the seal belt. Handling uto Switch Mounting. Insert the auto switch into the cylinder's switch mounting groove, then slide it sideways in the direction shown below and place it inside the switch spacer (with the spacer positioned over it). 2. Use a flat head watchmakers screw driver to fasten the switch, tightening with a torque of 0.05 to 0.N m. s a rule, it should be turned about 90 past the point at which tightening can be Handling. Do not inadvertently move the setting of the guide adjustment unit. The guide is already adjusted at the factory, and readjustment is not necessary under normal operating conditions. Therefore, do not inadvertently move the setting of the guide adjustment unit. 84 Switch mounting groove MB-2-6-89 uto switch
Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type Stroke djustment. s shown in Figure, to adjust the stopper bolt within the adjustment range, insert a hexagon wrench from the top to loosen the hexagon socket head set screw by approximately one turn, and then adjust the stopper bolt with a flat head screw driver. 2. When the adjustment described in above is insufficient, the shock absorber can be adjusted. Remove the covers as shown in Figure 2 and make further adjustment by loosening the hexagon nut.. Various dimensions are indicated in Table. Never make an adjustment that exceeds the dimensions in the table, as it may cause an accident and/or damage. Table (mm) (mm) 6 to MX. B to B MX. C Max. adjustment range 6 to 26 4 to 54 87 60 6 to 4 to 74 02 85 Hexagon socket head cap screw Top cover Upper plate assembly Hexagon socket head button screw Side cover Stopper bolt (Stopper bolt side) Hexagon wrench Torque djuster holder M6 x 2 Flat head screw driver B (Shock absorber side) Shock absorber Hexagon nut Shock absorber ring 0 (Ring width) Figure. Stroke adjusting section detail MX C (Stopper bolt overall length) BMX Figure 2. Cover installation and removal Figure. Maximum stroke adjustment detail Disassembly procedure. Remove the hexagon socket head cap screws, and remove the upper plates. 2. Remove the top cover.. Remove the hexagon socket head cap screws 2, and remove the end covers and couplers. 4. Remove the hexagon socket head cap screws. 5. Remove the hexagon socket head cap screws 4, and remove the end supports. 6. Remover the cylinder. ssembly procedure. Insert the MYBH cylinder. 2. Temporarily fasten the end supports with the hexagon socket head cap screws 4.. With two hexagon socket head cap screws on the or R side, pull the end support and the cylinder. 4. Tighten the hexagon socket head cap screws on the other side to eliminate the looseness in the axial direction. (t this point, a space is created between the end support and the end plate on one side, but this is not a problem.) 5. Re-tighten the hexagon socket head cap screws 4. Drive Cylinder (Series MYBH) Disassembly and ssembly Procedure Hexagon socket head cap screw (Tightening torque 25N m) Hexagon socket head cap screw 4 Upper plate (ø: Tightening torque 5N m ø6: Tightening torque N m) Coupler End cover Hexagon socket head cap screw 2 (Tightening torque 25N m) Drive cylinder (MYBH) End support Hexagon socket head cap screw (Tightening torque N m) Since series MYBH is a drive cylinder for series MYHT, its construction is different from series MYB. Do not use series MYB as a drive cylinder, because it will cause damage. Top cover Holding block End plate 6. Fasten the end cover with the hexagon socket head cap screws 2, while making sure that the coupler is in the right direction. 7. Place the top cover on the body. 8. Insert the holding blocks into the top cover and fasten the upper plates with the hexagon socket head cap screws. R How to order High rigidity MYHT Z7 High precision guide type Drive cylinder MYBH 6 mm 6mm Piping Nil G Standard type Centralized piping type Stroke (mm) 85
Standard Type ø, ø6 MYHT Stroke () P P PE PE PB S-M2 x.75 depth 2-M2 x.75 thread depth (to attach eyebolt) 5 pplicable nut JIS B6 Square nut M2 QE + Stroke Dimensions of T-slot for mounting Stopper bolt adjusting unit 4 Drive cylinder (MYBH-) EY HG H NH Z + Stroke N T-slot section for mounting H P NW 2-Rc /8 (Piping port) Model MYHT EY H HG H N NH NW P PB PE 7 97.5 45 6 2 02 27 04.5 70 77 26 2 7 4 254 90 0 5 68 274 2 Model MYHT P QE S Z 80 84 6 44 0 49 0 474 86
Centralized Piping Type ø, ø6 Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type (Refer to page 5 regarding centralized piping port variations.) MYHT G Stroke () P P PE PE S-M2 x.75 depth 2-M2 x.75 thread depth (to attach eyebolt) 5 PB pplicable nut JIS B6 Square nut M2 QE + Stroke Dimensions of T-slot for mounting Stopper bolt adjusting unit 4 Drive cylinder (MYBHG-) Model MYHT UU (TT) 7 27 RR SS 2-Rc /8 (Hexagon socket head taper plug) EY 97.5 04.5 H 45 70 H 2 26 Z + Stroke 02 2 7 N 5 NH 4 68 N H NH NW 254 274 SS EY RR T-slot section for mounting H P 90 (TT) UU P NW PB 0 2 2-Rc /8 (Piping port) PE Model P QE S Z RR SS TT MYHT 80 0 84 49 6 0 44 474 57 7.5 0.5 0.5 08 Note) For centralized piping specifications, the drive cylinder has centralized piping specifications (MYBHG-). UU 2.5 29 87
Side Support Side support MY-S6 2-ø7.5 0.5 8. 70 B 2-ø.5 Side support B MY-S6B 2-M2 x.75 8. 70 B Dimensions Model MY-S6 B pplicable cylinder MYHT 284 4 (mm) B 4 4 Guide for Using Side Supports For long stroke operation, the cylinder tube may be deflected depending on its own weight and the load weight. In such a case, use a side support in the middle section. The spacing (l) of the support must be no more than the values shown in the graph on the right. W l kg 0 0. If the cylinder mounting surfaces are not measured accurately, using a side support may cause poor operation. Therefore, be sure to level the cylinder tube when mounting. lso, for long stroke operation involving vibration and impact, use of a side support is recommended even if the spacing value is within the allowable limits shown in the graph. 2. Support brackets are not for mounting; use them solely for providing support. l W W l l Weight m 0 (4) (0) MYHT 0 0 0 0 Support spacing l mm 88
Mechanically Jointed Rodless Cylinder High Rigidity/High Precision Guide Type Construction Standard type Note) With top cover removed Note) With top cover removed Parts list No. 2 4 5 6 7 8 9 0 2 4 5 6 7 8 9 Description Guide frame Slide table Side cover Top cover Upper plate End plate Bottom plate End Cover Coupler djuster holder Guide Shock absorber Stopper bolt bsorber ring End support Top block Side block Slide plate Rodless cylinder Stopper Material Carbon steel Rolled steel Special resin Carbon steel Note Chromated Chromated Nickel plated Nickel plated Chromated Chromated MYBH Nickel plated 89