MY3A - SMC

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Series MY3 Auto Switch Specifications Auto Switch Proper Mounting Position (at Stroke End Detection) A B Auto Switch Proper Mounting Position MY3A (mm) Auto switch model Bore size 16 25 40 63 D-M9 D-M9V D-M9W D-M9WV A 26 33 46.5 57.5 B 84 117 193.5 262.5 D-A9 D-A9V A 22 29 42.5 53.5 B 88 121 197.5 266.5 MY3B/MY3M Auto switch model Bore size 16 25 40 63 D-M9 D-M9V D-M9W D-M9WV A 32 47 64.5 75.5 B 90 131 211.5 280.5 Note) Adjust the auto switch after confirming the operating conditions in the actual setting. D-A9 D-A9V A 28 43 60.5 71.5 (mm) B 94 135 215.5 284.5 Operating Range Auto switch model D-A9/A9V D-M9/M9V D-M9W/M9WV 16 6.5 3.5 Bore size 25 40 10.5 15 6 8 (mm) 63 14 ∗ Since the operating range is provided as a guideline including hysteresis, it cannot be guaranteed. (Assuming approximately ±30% dispersion.) It may vary substantially depending on an ambient environment. 8 Besides the models listed in How to Order, the following auto switches are applicable. ∗ For solid state auto switches, auto switches with a pre-wired connector are also available. Refer to pages 1328 and 1329 for details. ∗ Normally closed (NC = b contact) solid state auto switches (D-F9G/F9H types) are also available. Refer to page 1290 for details. 1156
Series MY3 Specific Product Precautions 1 Be sure to read before handling. Refer to front matters 54 and 55 for Safety Instructions and pages 3 to 11 for Actuator and Auto Switch Precautions. Caution on Design Warning 1. A deceleration circuit or shock absorber may be required. When a driven object is operated at high speed or the load is heavy, a cylinder’s cushion will not be sufficient to absorb the impact. Install a deceleration circuit to reduce the speed before cushioning, or install an external shock absorber to relieve the impact. In cases such as these, the rigidity of the machinery should also be examined. ∗ The external shock absorber should conform to the conditions on page 1135. Use caution because the use of a shock absorber falling short of the recommended conditions may damage the cylinder. Caution 1. Due to structural differences, fluctuations in the operating speed of mechanically jointed rodless cylinders may be larger than rod type air cylinders. Please consult with us if you require a precise, constant, speed in your application. Selection Caution 1. Provide intermediate supports for long stroke cylinders. Provide intermediate supports for cylinders with long strokes to prevent rod damage due to sagging of the rod, deflection of the tube, vibration and external loads. For detailed information, please refer to "Guide for Using Side Support" on pages 1143 and 1155. 2. For intermediate stops, use a dual-side pressure control circuit. Since the mechanically jointed rodless cylinders have a unique seal structure, slight external leakage may occur. Controlling intermediate stops with a 3 position valve cannot hold the stopping position of the slide table (slider). The speed at the restarting state also may not be controllable. Use the dual-side pressure control circuit with a PAB-connected 3 position valve for intermediate stops. 3. Constant speed Since the mechanically jointed rodless cylinders have a unique seal structure, a slight speed change may occur. For applications that require constant speed, select an applicable equipment for the level of demand. 4. Load factor of 0.5 or less When the load factor is high against the cylinder output, it may adversely affect the cylinder (condensation, etc.) and cause malfunctions. Select a cylinder to make the load factor less than 0.5. (Mainly when using an external guide) 5. Cautions on less frequent operation When the cylinder is used extremely infrequently, operation may be interrupted in order for anchoring and a change lubrication to be performed or service life may be reduced. Selection Caution 6. Consider uncalculated loads such as piping, cableveyor, etc., when selecting a load moment Calculation does not include the external acting force of piping, cableveyor, etc. Select load factors taking into account the external acting force of piping, cableveyor, etc. 7. Accuracy The mechanical jointed rodless cylinder does not guarantee traveling parallelism. When accuracy in traveling parallelism and a middle position of stroke is required, please consult with SMC. Mounting Caution 1. Do not apply strong impacts or excessive moment to the slide table (slider). Do not apply strong impact or excessive moment in mounting the work piece because the slide table (slider) is supported by resin bearings. 2. When connecting to a load which has an external guide mechanism, use a discrepancy absorption mechanism. A mechanically jointed rodless cylinder can be used with a direct load within the allowable range for each guide type, however, careful alignment is required when connecting to a load having an external guide mechanism. Mount the external guide mounting brackets and floating brackets in a place where the required degree of freedom for the floating Y and Z axes can be secured. The thrust transmission area of the floating bracket must be fixed so that it does not partially contact the body. ∗ Refer to the Coordinates and Moment in Model Selection on page 1144 for the details of floating Y and Z axes. 3. At each end of the cylinder, secure a mounting surface with a 5 mm or longer area that contacts the lower side of the cylinder. 5 mm or more Side support 5 mm or more 4. If the cylinder is mounted on the ceiling or wall under the condition where high load factors or impacts are expected, use side supports, in addition to the fixing bolts on the head cover, to support both ends of the cylinder tube. Side support 1157 MY1B MY1M MY1C MY1H MY1HT MY1W MY2C MY2H MY3A MY3B MY3M D- -X Individual -X Technical data
Page 1 and 2: Mechanically Jointed Rodless Cylind
Page 3 and 4: Stroke Adjusting Unit Floating Brac
Page 7 and 8: Series MY3 Model Selection 2 The fo
Page 9 and 10: Series MY3A Basic, short type (Rubb
Page 25 and 26: Series MY3M Slide bearing guide typ
Page 35: Mechanically Jointed Rodless Cylind
Page 39 and 40: Series MY3 Specific Product Precaut

MY3A - SMC

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