SMK Series. Additional Information. Stepping Motors. Technical Reference F-1 General Information G-1. Motor & Driver Packages.

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1 Stepping s Low-Speed Synchronous s SMK Series dditional Information Technical Reference F-1 General Information G-1 Introduction S S PLUS SC RK CFK2 CSK PMC UMK CSK PKPV PK UI212G EMP41 SC EMP42 SCE SG8J SMK ccessories Closed Loop 5-Phase Microstep C Input DC Input C Input DC Input 5-Phase FullHalf DC Input C Input DC Input & Driver Packages 2-Phase Stepping s Driver Controllers 2-Phase FullHalf with Indexer without with Low-Speed Synchronous s Before Using a Stepping ORIENTL MOTOR GENERL CTLOG 224 C-27

2 Stepping s Low-Speed Synchronous s SMK Series Low-speed synchronous motors provide highly precise speed regulation, low-speed rotation, and quick bidirectional rotation. The basic construction of low-speed synchronous motors is the same as that of stepping motors. Since they can be driven by an C power supply, they are sometimes called C stepping motors. Features Low-Speed Synchronous Rotation The motor rotates at a speed proportional to and accurately synchronized with the frequency of the power supply. fluctuation in load does not affect the rotation speed. t 5 Hz 6 rmin ( rmin) t 6 Hz rmin ( 6 rmin) For SMK14M- Continuous Rated -Run This motor can be driven at a continuous rating even when bi-directional operation is required. Precise Positioning The motor can be stopped instantly by turning off the power supply. The stopping accuracy within the motor's permissible load inertia is 1. When a precision switch is used, simple and precise positioning is possible. Lowering pplications Constant speed can be maintained even during lowering operations. Low-speed synchronous motors are suitable for applications, where vertical operation at a constant speed is required. Superb Starting, Stopping and Reversing Characteristics If operated within the permissible load inertia, the motor can start, stop and reverse within 1.5 cycles (. sec at 5 Hz,.25 sec at 6 Hz) of the power supply frequency. Suitable for equipment that starts and stops repeatedly such as conveyors. Start-Up Start-Up Stop Stop Bi-directional operation can be repeated continuously. Holding Torque Since a permanent-magnet, multi-poled rotor is used, the motor has holding torque even when the motor is not energized. When used with a gearhead, comparatively high holding torque can be utilized. When a larger holding torque is required, a DC power supply can be connected as soon as the C power supply is cut off. DC Excitation Page C-281 Low-Noise Gearheads Pinion shaft models are available that can be connected directly to standard Oriental GN-type low-noise gearheads. C-274 ORIENTL MOTOR GENERL CTLOG 224 Features C-274 System Configuration C-275 Specifications C-276

3 Safety Standards and CE Marking System Configuration Product Number Code SMK SMK Series 5 (SMK14, SMK are not recognized.) Details of Safety Standards Page G-2 Gearhead Standards UL14 UL519 CS C22.2 No.1 CS C22.2 No.77 Mounting Brackets (ccessories) ( Page C-295) 14 Torque GN 5 K M - Speed Blank: 6 rmin (56 Hz) M: 6 rmin (56 Hz) Frame Size : 1.65 in. sq. (42 mm sq.) 2: 2.22 in. sq. (56.4 mm sq.) or 2.6 in. sq. (6 mm sq.) 5:.5 in. sq. (85 mm sq.) or.54 in. sq. (9 mm sq.) Type of Bearings and Shaft Size K: Ball bearing type and inchsized output shaft (Example) 5: of 5:1 Gearhead Frame Size 2: 2.6 inch sq. (6 mm sq.) 5:.54 inch sq. (9 mm sq.) Certification Body Gearhead Type GN: GN type (for use with GN-type Pinion Shaft ) UL Flexible Couplings (ccessories) ( Page C-2) Standards File No. E64199 (Included) Shaft Type : Round Shaft GN: Pinion Shaft (for use with GN type gearhead) Voltage : Single-Phase 11 VC SMK : US Version Geared SMK Series CE Marking Low Voltage Directives C Power Supply (Not supplied) Cap (Included) Insulates the capacitor terminal - 12 (Example) 12: of 12:1 Voltage : Single-Phase 11 VC Frame Size : 1.65 in. sq. (42 mm sq.) Shaft Type : Single Shaft Stepping s Introduction S S PLUS SC RK CFK2 CSK PMC UMK CSK PKPV PK UI212G EMP41 SC EMP42 SCE SG8J SMK ccessories Closed Loop 5-Phase Microstep C Input DC Input C Input DC Input 5-Phase FullHalf DC Input C Input DC Input & Driver Packages 2-Phase Stepping s Driver Controllers 2-Phase FullHalf with Indexer without with Low-Speed Synchronous s Before Using a Stepping Dimensions C-278 Connection and Operation C-28 ORIENTL MOTOR GENERL CTLOG 224 C-275

4 Stepping s Product Line SMK14- SMK14M- SMK27- SMK51- SMK516- SMK216-GN (GN-type Pinion Shaft) SMK55-GN (GN-type Pinion Shaft) Geared SMK- 12 Enter the gear ratio in the box () within the model number. Gearheads (Sold Separately) 2GNK 18 5GNK 18 Enter the gear ratio in the box () within the model number. Specifications Continuous Rating UC (Except for SMK14) Voltage VC Frequency Hz Current Torque oz-in N m Speed rmin Holding Torque oz-in mn m Holding Inertia J oz-in 2 kg m 2 F External Resistor Ω W SMK14- Single-Phase (.11) 17. (.12) (9). (551 7 ) (.1) SMK14M- Single-Phase (.11) 17. (.12) 6.6 (4.5). (551 7 ) (.1) 6 SMK27- Single-Phase (.7) 52 (.7) 6.5 (25) 1.64 (1 7 ) (.7) SMK216-GN Single-Phase (.16) 22 (.16) () 2.66 (121 7 ) (.16) SMK51- Single-Phase (1.) 142 (1.) (6) 7.7 (141 7 ) (1.1) SMK516- Single-Phase (1.6) 25 (1.8) (89) 14.8 (271 7 ) (2.1) SMK55-GN Single-Phase (.5) 71 (.5) (6) (141 7 ) (.5) Geared Voltage VC Frequency Hz Current Speed 1 rmin Holding Torque 2 oz-in mn m Rotor Inertia J oz-in 2 kg m 2 F SMK- Single-Phase (9). (551 7 ) Hz: Gear output shaft speed = 6 [rmin] 6 Hz: Gear output shaft speed = [rmin] 2 This value applies to round shaft motors. To calculate holding torque for gearmotors, use the following formula: listed holding torque gear ratio. Note that the gearmotor holding torque should be lower than the permissible torque on the gear output shaft. Permissible Torque with Gearhead ttached Page C-277 C-276 ORIENTL MOTOR GENERL CTLOG 224 Features C-274 System Configuration C-275 Specifications C-276

5 General Specifications Item Shaft Runout Concentricity Perpendicularity Shaft Radial Play 2 Shaft xial Play Step ccuracy Insulation Resistance Dielectric Strength Insulation Class Temperature Rise mbient Temperature Range Specifications.2 inch (.5 mm) T.I.R. 1. inch (.75 mm) T.I.R. 1. inch (.75 mm) T.I.R. 1.1 inch (.25 mm) maximum [Load 1.12 lb. (5 N)]. inch (.75 mm) maximum [Load 2.2 lb. (1 N)].6 1 MΩ or more when the megger reading between the windings and the case is 5 VDC. Sufficient to withstand 1.5 kv at 6 Hz applied between the windings and the case for one minute. Class E [248 F (12 C)] Recognized as Class [221 F ( C)]by UL and CS standard 99 F (55 C) or less as measured by thermometer method after rated operation. 14 F14 F (1 C4 C) (nonfreezing) 1 T.I.R. (Total Indicator Reading): Total dial gauge reading when the measurement section is rotated 1 revolution, centered on the reference axis center. 2 Radial Play: Displacement in shaft position in the radial direction when a 1.12 lb. (5 N) load is applied to the motor shaft tip in a radial direction. xial Play: Displacement in shaft position in the axial direction when a 2.2 lb. (1 N) load is applied to the motor shaft in the axial direction. Permissible Torque with Gearhead ttached Gearhead 1 Gearheads are sold separately. The box () represents the desired gear ratio, which becomes part of the product number for the gearhead or gearmotor. white background indicates that the output shaft of the gearhead rotates in the same direction as the output shaft of the motor. colored background indicates rotation in the opposite direction. Permissible Overhung Load and Permissible Thrust Load, Geared SMK14 SMK27 SMK51, SMK516 SMK- Gearhead 2GNK 5GNK SMK216-GN2GNK 1 SMK55-GN5GNK 1 SMK Overhung Load Distance from Shaft End [inch (mm)].2 (5).9 (1).59 ().79 (2) Overhung Load Distance from Shaft End [inch (mm)].9 (1).79 (2) Unit = Upper values: lb-inlower values: N m Unit = Upper values: lb.lower values: N Thrust Load The permissible thrust load shall be no greater than the motor mass.. Unit = Upper values: lb.lower values: N Thrust Load Stepping s Introduction S S PLUS SC RK CFK2 CSK PMC UMK CSK PKPV PK UI212G EMP41 SC EMP42 SCE SG8J SMK ccessories Closed Loop 5-Phase Microstep C Input DC Input C Input DC Input 5-Phase FullHalf DC Input C Input DC Input & Driver Packages 2-Phase Stepping s Driver Controllers 2-Phase FullHalf with Indexer without with Low-Speed Synchronous s Before Using a Stepping Dimensions C-278 Connection and Operation C-28 ORIENTL MOTOR GENERL CTLOG 224 C-277

6 Stepping s Permissible Load Inertia Starting, stopping and reversing characteristics vary according to the amount of load inertia directly coupled to the motor. Permissible load inertia, therefore, refers to the upper limit of load inertia under which the motor can be operated normally when the load is connected directly to the motor shaft. When the amount of load inertia is too great, the motor may vibrate or reverse direction. It is recommended to use flexible couplings when connecting the load to the motor shaft. SMK14- SMK14M- SMK27- SMK51- SMK516- Permissible Load Inertia: J oz-in 2 (1-4 kg m 2 ) 1.5 (.275) 1.7 (2.5) 8 (7) 66 (12) Permissible Load Inertia for Geared s (J) Gearhead Unit = Upper values: lb-in 2 Lower values: 1-4 kgm 2 Gearhead Geared SMK216-GN2GNK SMK55-GN5GNK Gearmotor SMK Unit = Upper values: lb-in 2 Lower values: 1-4 kgm Dimensions Scale 14, Unit = inch (mm) SMK14-, SMK14M- Weight:.66 lb. (. kg) d B1.7 (9.).49 (12.4) 1.67 (42.5).8 SMK51- Weight:.7 lb. (1.7 kg) d B127U 2.6 (66).9 (1).79.4 (21) (.25) (4.5.) (5.12) (22.) (2) Leads 12 inch ( mm) Length UL Style 6, WG (71).8 (2) (25.25) 1.65(42) (1.1) (1.1).16 (4).5 (12.6) M P.5.2(5) Deep Min. 4 Places.5( 85) ( ).256 (6.5) 4 Holes SMK27- Weight: 1.5 lb. (.7 kg) d B1 2.1 (54).2 (5).79.4 (21).6 (1.6) (.25) [14"].25.5 (6.5.12) (5.8.) Leads 12 inch ( mm) Length UL Style 6, WG 2 SMK516- Weight: 6.2 lb. (2.8 kg) d B128U.78 (96).9 (1) (71).8 (2) (8.1.) (25.25) 2.22( 56.4) ( ).177 (4.5) 4 Holes.5 ( 85) ( ) ( ).256 (6.5) 4 Holes ' ( ) ' ( ) [12"].5.7 ( ) (7.25.) Leads 12 inch ( mm) Length UL Style 6, WG (11.5.) (11.5.) Shaft cross Section -' [12"] Leads 12 inch ( mm) Length UL Style 6, WG2.5.7 ( ) (7.25.) (11.5.).45.6 (11.5.) Shaft cross Section -' C-278 ORIENTL MOTOR GENERL CTLOG 224 Features C-274 System Configuration C-275 Specifications C-276

7 .79.6 Gearhead SMK216-GN2GNK Weight: 1.9 lb. (.85 kg) d B129U (2GNK18K) B129BU (2GN25K18K) 2.22 ( 56.4).169 ( 4.) 1.54 (9).2 (5) L 1..4 (21).12 ().47 (12) [516"] (7).).9.2 (7.97 (1.5).94 (24) (7.5) Leads 12 inch ( mm) Length UL Style 6, WG2 2GNK~18K: L = 1.18 () 2GN25K~18K: L = 1.57 (4) Geared SMK- Weight: 1.1 lb. (.5 kg) d B2.7 (9.).49 (12.4) 2. (69) (included with the motor) Unit = inch (mm).79 (2).18 (4.5) B.9 (1) B.16(4).9 (1) C.24 (6).169 (4.).79 (2) External Resistor (included with SMK5 only) Weight: 2.1 oz. (6 g).18 (4.5) 1.8 (5).75 (19) (21) ().47 (12).177 (4.5) (5.12).71 (18).94 (1).5 (85) 4.65 (118).1 (8) Leads 12 inch ( mm) Length UL Style 6, WG ( 6).177 (4.5) 4 Holes 1.65(42) (1.) (16) B B.9 (1).18 (4.5).16 (4) (2).9 (1) C (1.).16 (4).5 (12.6) M P.5.28(7) Deep Min. 4 Places.5 ( 85) Gearhead SMK55-GN5GNK Weight: 7. lb. (.2 kg) d B1U (5GNK18K) B1BU (5GN25K18K) 2.6 (66).9 (1) SMK14- SMK14M- SMK- SMK216-GN SMK27- L 1..4 (21).12 () CH6BFUL.75 (19) Leads 12 inch ( mm) Length UL Style 6, WG2 5GNK~18K: L = 1.65 (42) 5GN25K~18K: L = 2.6 (6) [12"].7.5 ( ) (11.4.) CH12UL 1.22 (1) SMK55-GN CH6BUL 1.22 (1) SMK CH25UL SMK516- (1) cap is included with the capacitor. Dimensions inch (mm) B C 1.22 (1).71.2 (18.5) 1.42 (6) (14.5).57 (14.5).57 (14.5).67 (17) (14.5).54 ( 9).256 (6.5) 4 Holes.9 (2.5).9 (2.5).9 (2.5) 1.7 (27) Weight oz. (g).5 ().6 (17).5 ().71 (2) No. Stepping s Introduction S S PLUS SC RK CFK2 CSK PMC UMK CSK PKPV PK UI212G EMP41 SC EMP42 SCE SG8J SMK ccessories Closed Loop 5-Phase Microstep C Input DC Input C Input DC Input 5-Phase FullHalf DC Input C Input DC Input & Driver Packages 2-Phase Stepping s Driver Controllers 2-Phase FullHalf with Indexer without with Low-Speed Synchronous s Before Using a Stepping Dimensions C-278 Connection and Operation C-28 ORIENTL MOTOR GENERL CTLOG 224 C-279

8 Stepping s Connection and Operation When the switch is set to, the motor rotates in the clockwise direction. When set to, the motor rotates in the counterclockwise direction. The motor can be stopped instantly by turning off the power supply. The direction of motor rotation is as viewed from the shaft end of the motor. The capacitor and external resistor (for SMK5 only) are included with the motor. SMK2 Type Single-Phase 11 VC R C SW R C Gray SMK Type SMK5 Type Single-Phase 11 VC R C SW R C White Single-Phase 11 VC R C SW R C External resistor To protect the contact point of relays and switches, always connect the accessory surge suppressor. CR circuit for surge suppression is available as an accessory. Page -218 When the gearedmotor or GN gearheads are used, the rotating direction of output shaft differs according to the gear ratio. Gray Starting Time Low-speed synchronous motors offer superb starting, stopping and reversing characteristics. Provided that the motor is operating within permissible load inertia limits, it can be started, stopped or reversed within 1.5 cycles of the applied frequency. The motor will start and reach a steady speed in the time shown in the table. s seen in this table, there is a certain amount of variation in the time required for the motor to reach the set speed. This is attributable to factors linked with the phase of the power source and the relative positions of the rotor and stator when the current is applied. One method of reducing these vibrations is to use a zero cross switch. Other possibilities include the use of special control circuits. Load Inertia: J oz-in 2 kg m 2 SMK14- SMK14M- SMK- SMK27- SMK216-GN SMK SMK55-GN SMK Starting Time (ms) Start Up Enter the gear ratio in the box () within the model number. Settling Stopping Time (ms) Settle Down Settling C-28 ORIENTL MOTOR GENERL CTLOG 224 Features C-274 System Configuration C-275 Specifications C-276

9 DC Excitation When a holding torque larger than the static holding torque of the stopped motor is required, apply a DC voltage simultaneously while turning the C power supply off. Connection Diagrams 1-Phase Excitation C power source DC power source R C R C R C R C R C R C External resistor (For SMK5 only) 2-Phase Excitation (Series) C Power source 2-Phase Excitation (Parallel) C Power source R C R R DC Power source R C DC Power source C C External resistor (For SMK5 only) External resistor (For SMK5 only) Gray (White) The white leads listed in parentheses are only for the SMK. Connect the supplied external resistor to the capacitor in series for the SMK5 model. External resistors are not needed for the SMK and SMK2 models. To prevent DC power supply damage caused by voltage surges, connect a surge suppressor circuit between the contact points of the relay switches. The EPCR121-2 surge suppressor circuit is available as an accessory. Page -218 R R C R C R R R R R R C C R C R C C C C C C Gray (White) Gray (White) Holding Torque [Nm] Holding Torque [N m] Characteristics for DC Excitation SMK14-, SMK14M-, SMK Holding Torque [oz-in] Phase Excitation (Parallel) SMK27-, SMK216-GN Holding Torque [oz-in] Voltage [VC] Permissible pplied Voltage 1-Phase Excitation 2-Phase Excitation (Parallel) 2-Phase Excitation 1-Phase Excitation (Parallel) SMK14- SMK14M- 2-Phase Excitation (Series) Permissible pplied Voltage 1-Phase Excitation SMK27- SMK216-GN 2-Phase Excitation (Series) 1 Voltage [VDC] 2-Phase Excitation (Series) SMK51-, SMK55-GN Permissible pplied Voltage. 4 2-Phase Excitation 2-Phase Excitation (Parallel) 2-Phase Excitation (Series) 2.5 (Parallel) 2-Phase Excitation (Series) 1-Phase 2. Excitation Holding Torque [N m] Holding Torque [oz-in] 2 1 SMK516- Holding Torque [N m] Holding Torque [oz-in] Phase Excitation (Parallel) Phase Excitation SMK51- SMK55-GN Voltage [VDC] Permissible pplied Voltage 1-Phase Excitation 2-Phase Excitation (Series) Voltage [VDC] These values apply to round shaft motors. To calculate holding torque for gearmotors, use the following formula: listed holding torque gear ratio Note that the gearmotor holding torque should be lower than the permissible torque on the gear output shaft. Permissible Torque with Gearhead ttached Page C-277 Stepping s Introduction S S PLUS SC RK CFK2 CSK PMC UMK CSK PKPV PK UI212G EMP41 SC EMP42 SCE SG8J SMK ccessories Closed Loop 5-Phase Microstep C Input DC Input C Input DC Input 5-Phase FullHalf DC Input C Input DC Input & Driver Packages 2-Phase Stepping s Driver Controllers 2-Phase FullHalf with Indexer without with Low-Speed Synchronous s Before Using a Stepping Dimensions C-278 Connection and Operation C-28 ORIENTL MOTOR GENERL CTLOG 224 C-281

10 Stepping s C-282 ORIENTL MOTOR GENERL CTLOG 224