Precision Step Motors

Transcription

1 Precision Step Motors P E O P L E P R O D U C T S V I S I O N A Minebea Group Company W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW

2 P E O P L E P R O D U C T S V I S I O N A Minebea Group Company 973 Independence Avenue Chatsworth, CA U.S.A. Tel: Fax: info@nmbcorp.com Web site: ISO 141 ISO 91 ISO 92 QS 9 Keeping The World In Motion An established industry leader in the design and manufacture of precision stepping motors, NMB Corporation offers a broad range of standard and custom designs for OEM users. New precision stepping motors are introduced and specified in this catalog: the new 17PMK and 17PUH SMH series are sheet metal construction type hybrid motors, our hightorque hybrid 17PMK series, our new microstep, lownoise, hightorque 23LM/KM hybrid motor series, and added availability of the 15, 17 and 23 size permanent magnet motors. These new offerings reflect our commitment to advanced engineering design, leadingedge production technology and ongoing quality control programs that assure total customer satisfaction. With our complete inhouse volume production capabilities and one of the largest tool and die centers in the industry, NMB continues its dedication to vertical integration, which results in high product quality at competitive pricing schedules. The company s facilities allow for the internal production of miniature precision bearings, die casting, lamination stamping and injection molding. A leader in materials research, automated production technology and continuous quality improvement, NMB has earned ISO 91, ISO 92 and QS 9 certification. In addition, the company has been recognized for its pioneering environmental safety efforts since March 1993 with the award of ISO 141 environmental certification in All NMB companies and subsidiaries are CFC and trichloroethane free. As one of the Minebea group of companies, NMB has extensive resources at its disposal to satisfy the most demanding requirements of its worldwide customer base. Plus, our global technical support staff is always available to discuss solutions for your particular engineering application. W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW

3 TOPIC TABLE of CONTENTS W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW TABLE of CONTENTS PAGE Index Part Numbering System HYBRID MOTORS 14PMM 1.8º Hybrid PYQ.9º Hybrid PUM 3.75º Hybrid PMK 1.8º Hybrid PMK 1.8º Hybrid Torque/Speed Characteristics PWM 1.875º Hybrid PSM 3.6º Hybrid PUH 3.75º Hybrid PMK 1.8º / 17PUH 3.75º SMH (Sheet Metal Hybrid) LYC.9º Hybrid LMC 1.8º Hybrid LMK 1.8º Hybrid (Microstep/Low Noise Series) KMC 1.8º Hybrid (High Torque) KMK 1.8º Hybrid (High Torque/Microstep) LQC 5º Hybrid PMC 1.8º Hybrid PERMANENT MAGNET MOTORS 6BJH 18º Permanent Magnet BJH 18º Permanent Magnet BAH 15º Permanent Magnet BBH 7.5º Permanent Magnet BBH 7.5º Permanent Magnet BBH 7.5º Permanent Magnet Motor Terminology Conversion Tables Switching Sequence Tables Ordering Information & Warranty Worldwide Sales Office Listing back cover CORPORATION

4 4 INDEX INDEX HYBRID MOTORS Motor Model Step Rated Rated Winding Induc Holding Rotor Diameter Number Angle Voltage Current Resistance tance Torque Inertia Page Inches Degrees Volts Amps Ohms mh gcm ozin gcm 2 ozin PMM PMM PYQ PYQ PUM PUM PMK16V , PMK17V , PMK18V , PMK316V , PMK31V , PMK33V , PMK111V , PMK11V , PMK13V , PMK42V* , PWM , PSM1V PUH8V PUH1OV PUH39V , PUH312V , PMK24VT** , PMK18VT** , PUH24VT** PUH18VT** , LYC , LYC , LYC , LYC , LYC , LYC , LYC , LYC , LMC25OV , LMC213V , LMC343V , LMC355V , LMC47V , LMC55V , LMK25V , LMK213V , LMK343V , LMK355V , LMK47V , LMK55V , KMC25V , KMC379V , KMC32V , KMC716V , KMK25V , KMK379V , KMK32V , KMK716V , W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW

5 HYBRID MOTORS (cont d.) INDEX INDEX Motor Model Step Rated Rated Winding Induc Holding Rotor Diameter Number Angle Voltage Current Resistance tance Torque Inertia Page Inches Degrees Volts Amps Ohms mh gcm ozin gcm 2 ozin LQC22V , (cont d.) 23LQC39V , LQC55V , PMC , 278 1, PMC , 278 1, PMC , PMC , W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW *NMB s new 17 size hightorque motor **NMB s new sheet metal hybrid (SMH) motor series PERMANENT MAGNET MOTORS Motor Model Step Rated Rated Winding Induc Holding Rotor Diameter Number Angle Voltage Current Resistance tance Torque Inertia Page Inches Degrees Volts Amps Ohms mh gcm ozin gcm 2 ozin 2.6 6BJH BJH BJH BJH BAH51P BAH73P BAH43P BBH51P BBH73P BBH17P BBH43P BBH262P BBH267P BBH24P BBH251P , BBH252P , BBH246P , Hybrid Type (ozin) Model 14PMM (1.8 ) 16PYQ (.9 ) 16PUM (3.75 ) 17PMK (1.8 ) 17PWM (1.875 ) 17PSM (3.6 ) 17PUH (3.75 ) 23LYC (.9 ) 23LMC (1.8 ) 23LMK (1.8 ) 23KMC (1.8 ) 23KMK (1.8 ) 23LQC (5 ) STEP MOTOR PERFORMANCE Holding Torque Range Permanent Magnet Type (ozin) Model 6BJH (18 ) 8BJH (18 ) 15BAH (15 ) 15BBH (7.5 ) 17BBH (7.5 ) 23BBH (7.5 ) CORPORATION

6 PART NUMBERING SYSTEM Size Motor O.D. in tenths of an inch. (Example: Size 23 = 2.3 Dia.) Step Angle (Degree) Type B = Permanent Magnet L = Precision, Hybrid K = Precision, Hybrid P = Precision, Hybrid Step Angle A = 15 B = 7.5 J = 18 M = 1.8 Q = 5. S = 3.6 U = 3.75 W = Y =.9 PART NUMBERING SYSTEM 23 L M K 1 1 W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW CUSTOM FEATURES NMB will modify the step motors in this catalog to meet your applicationspecific requirements by customizing these features: Pulley/Gears Windings ReWire Ends Shaft Connector or Wire On Lead Termination Mount Tapped Encoder Holes SIZE/STEP ANGLE MATRIX Versions 1 to 99 = standard L1 to L9 = with leadscrew G1 to G9 = with gear P1 to P9 = with pulley Different Windings 1 to 99 Motor Lengths to 9 Motor Construction C = 2 & 4 phase Hybrid H = 2 & 4 phase PM K = 2 & 4 phase Hybrid M = 2 & 4 phase Hybrid Q = 2 & 4 phase Hybrid Size (x.1 inch) Size CORPORATION Hybrid Type Permanent Magnet Type

7 1.2 (26) 1.38 (35) (N mx1 4 ) BLUE WHITE LEAD WIRE UL 3266 AWG (3) MIN 4M3 x.5 MIN.135 (3.5) DP (22..5 ) K 1K 1K 14PMM 1.8 º HYBRID.67 (1.7).95 (24) 1.3 MAX (26) (5..13 ) 14PMM 1.8 º HYBRID Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Switching Sequence... See page 31 Number V A Ω gcm mh gcm 2 gcm g 14PMM PMM Model: 14PMM24 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.18 (A/WDG) Load Inertia: 34. (gcm 2 ) W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW Model: 14PMM26 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K CORPORATION

8 16PYQ.9 º HYBRID 16PYQ.9 º HYBRID Step Angle....9º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 16PYQ PYQ CORPORATION (31) 1.57 (4) Model: 16PYQ27 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.25 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K LEAD WIRE UL 3266 AWG (3) MIN 4M3 x.5 MIN.135 (3.5) DP (22..5 ).8 (2).95 (24) 1.3 MAX (26) BLUE WHITE W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW (5..13 ) Model: 16PYQ24 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.9 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K

9 BLUE WHITE 16PUM 3.75 º HYBRID 16PUM 3.75 º HYBRID Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 16PUM PUM Model: 16PUM3 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.7 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) LEAD WIRE UL3266 AWG (3) MIN ( 22..5) K 1K 1K Model: 16PUM6 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW (39) 1.22 (31) ( ) 4M3 x.5 MIN.157 (4) DP 1.22 (31) 1.54 (39).95 (24).8 (2) 1.18 MAX (3) K 1K 1K CORPORATION

10 17PMK 1.8 º HYBRID 17PMK 1.8 º HYBRID W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 17PMK16V , PMK17V , PMK18V , PMK316V , PMK31V , PMK33V , PMK111V , PMK11V , PMK13V , PMK42V , (6) 1.22 (31) 1.65 (42) LEAD WIRE UL 17 AWG (3) MIN P/N L.61 (15.5) 4M3 x.5 MIN.157 DP 17PMKXX 1.34 (34) 17PMK3XX 1.5 (38.1) 17PMK1XX 1.57 (42.1) 17PMK4XX 1.85 (47) 1 CORPORATION (22..5 ).8 (2).95 (24) BLUE WHITE.41 (1.5) (5..13 ).315 (8)

11 Model: 17PMK16V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK316V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK111V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K 17PMK 1.8 º HYBRID 17PMK 1.8 º HYBRID W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW Model: 17PMK17V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK31V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK11V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK18V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.2 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK33V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.2 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 17PMK13V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.2 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) K 1K 1K CORPORATION

12 17PWM º HYBRID 17PWM º HYBRID Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) LEAD WIRE UL3266 AWG (3) MIN Number V A Ω gcm mh gcm 2 gcm g 17PWM , CORPORATION (42) 1.22 (31) 4M3 x.5 MIN.157 (4) DP 1.22 (31) 1.65 (42) (N mx1 4 ) ( 22..5) ( ).95 (24) BLUE WHITE W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW (2) 1.18 (3) MAX Model: 17PWM3 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.65 (A/WDG) Load Inertia: 34. (gcm 2 ) 2 1 1K 1K 1K

13 .24 (6) 1.22 (31) 1.65 (42) BLUE WHITE 17PSM 3.6 º HYBRID 17PSM 3.6 º HYBRID Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 17PSM1V Model: 17PSM1V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/WDG) Load Inertia: 34. (gcm 2 ) (N mx1 4 ) LEAD WIRE UL 17 AWG (3) MIN.61 (15.5) 4M3 x.5 MIN.157 (4) DP (22..5 ).8 (2).95 (24) 1 1 1K 1K 1K 1.34 (34).41 (1.5) (5..13 ) W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW (8) CORPORATION

14 17PUH 3.75 º HYBRID 17PUH 3.75 º HYBRID W.1Y.COM.TW WW.1Y.COM.TW Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 17PUH8V PUH1V PUH39V , PUH312V , (N mx1 4 ) (6) 1.22 (31) 1.65 (42) Model: 17PUH1V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/WDG) Load Inertia: 34. (gcm 2 ) 1 1 1K 1K 1K LEAD WIRE UL 17 AWG (3) MIN WW.1Y.COM.TW (15.5) 4M3 x.5 MIN.157 DP P/N L 17PUHXX 1.34 (34) 17PUH3XX 1.5 (38) (N mx1 4 ) ) ( CORPORATION (2).95 (24) BLUE WHITE Model: 17PUH39V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/WDG) Load Inertia: 34. (gcm 2 ).41 (1.5) ( ).315 (8) 2 1 1K 1K 1K

15 .28 (7) 1.7 (43) (31.2 ) 4M3 x (31.2) 1.7 (43) BLUE (16) 17PMK 1.8 º SMH HYBRID 17PUH 3.75 º SMH HYBRID WHITE 17PMK 1.8 /17PUH 3.75 º SMH HYBRID LEAD WIRE UL 17 AWG (3) MIN ( ) ( ) Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....1 mm Max. (45 gload) Step Rate Rated Current/ Winding Resistance/ Holding Rotor Detent Model Angle Voltage Phase Phase Torque Inductance Inertia Torque Weight Number D V A Ω gcm mh gcm 2 gcm g 17PMK24VT , PMK18VT , PUH24VT PUH18VT , Model: 17PMK24VT Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/PH) Load Inertia: 27. (gcm 2 ) (N mx1 4 ) K 1K 1K 31 (8) (3) MIN.4 (1.) (26) MAX (21.5) (22.5) Model: 17PUH24VT Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/PH) Load Inertia: 27. (gcm 2 ) (N mx1 4 ) NOTE: Also available with winged mounting brackets. W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW K 1K 1K P/N L 17PMK2XX 1.2 (26) 17PMKXX 1.18 (3) 17PUH2XX 1.2 (26) 17PUHXX 1.18 (3) Model: 17PUH18VT Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1. (A/PH) Load Inertia: 27. (gcm 2 ) (N mx1 4 ) K 1K 1K CORPORATION

16 ( 38.1 ) ( 6.35 ) (56.4) LYC.9 º HYBRID P/N L 23LYC2XX 1.61 (41.) 23LYC3XX 1.45 (49.5) 23LYCXX 2.22 (56.5) 23LYC.9 º HYBRID Step Angle....9º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 23LYC , LYC , LYC , LYC , LYC , LYC , LYC , LYC , Model: 23LYC22 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.25 (A/WDG) Load Inertia: 172. (gcm 2 ) (N mx1 4 ) K 1K 1K 16 CORPORATION (56.4) 1.86 (47.14) 4.2 (5.8) Model: 23LYC35 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/WDG) Load Inertia: 166. (gcm 2 ) (N mx1 4 ) K 1K 1K 1.86 (47.14) 2.22 (56.4) LEAD WIRE UL 3266 AWG (3) MIN (1.59).81 (2.64).187 (4.76) GREEN L WHITE W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW BLUE Model: 23LYC2 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.6 (A/WDG) Load Inertia: 147. (gcm 2 ) (N mx1 4 ) K 1K 1K

17 LEAD WIRE UL 17 AWG (3) MIN.2 (5).826 (21) 1.86 (47.14) 2.22 (56.4).81 (2.64) ( ) 4.2 (5.8) BLUE WHITE 23LMC 1.8 º HYBRID.63 (1.59).187 (4.76) L.43 (11).75 (19.5) W.1Y.COM.TW WW.1Y.COM.TW ( WW.1Y.COM.TW LMC 1.8 º HYBRID Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1MΩ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A Ω gcm mh gcm 2 gcm g 23LMC25V , LMC213V , LMC343V , LMC355V , LMC47V , LMC55V , Model: 23LMC25V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 23LMC343V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 23LMC47V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) P/N L 23LMC2XX 1.61 (41.) 23LMC3XX 1.95 (49.5) 23LMCXX 2.22 (56.5) 1 1 1K 1K 1K CORPORATION

18 23LMK22 規格表 電壓 :5 V 電流 :1.1 A.1Y.COM.TW 阻抗 : 5.6 Ω W.1Y.COM.TW 精度 :1.8 DEG 轉一圈 2 步 六線式步進馬達兩相激磁 WW.1Y.COM.TW WW.1Y.COM.TW 綠 A 綠白 A 紅 B 紅白 B 白 V 黑 V Motor Type Size (Outer Diameter) Size (Length) Drive Voltage Drive Method Step Angle 23LMK22 58mm 65mm 5 Volt 22 Phase 1.8 degree M.TW W.1Y.COM.TW OM.TW.TW 1Y.COM.TW

19 23LMK 1.8 º HYBRID 23LMK 1.8 º HYBRID W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW LEAD WIRE UL 17 AWG (3) MIN 18 P/N Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload).2 (5).826 (21) 1.86 (47.14) 2.22 (56.4) Microstep/ Low Noise Series.81 (2.64) ( ) 4.2 (5.8).63 (1.59).187 (4.76) L.43 (11).75 (19.5) ( ) Number V A ½ gcm mh gcm 2 gcm g 23LMK25V , LMK213V , LMK343V , LMK355V , LMK47V , LMK55V , Model: 23LMK25V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) L 23LMK2XX 1.61 (41.) 23LMK3XX 1.95 (49.5) 23LMKXX 2.22 (56.5) 1 1K 1K 1K CORPORATION Model: 23LMK343V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K BLUE WHITE Model: 23LMK47V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K

20 ( 38.1 ) ( 6.35 ).26 (6.5) 2.22 (56.4) 1.86 (47.14) 4.2 (5.8) High Torque.76 (19.4) 1.86 (47.14) 2.22 (56.4) BLUE WHITE KMC 1.8 º HYBRID 23KMC 1.8 º HYBRID Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A ½ gcm mh gcm 2 gcm g 23KMC25V , KMC379V , KMC32V , KMC716V , ,5 Model: 23KMC25V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K LEAD WIRE UL17 AWG (3) MIN.63 (1.59).81 (2.64).26 (6.5).187 (4.76) L.22 (5.5).2 (5.) W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW Model: 23KMC379V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K P/N L 23KMC2XX 1.65 (42) 23KMC3XX 1.97 (5) 23KMCXX 2.13 (54) 23KMC7XX 2.99 (76) Model: 23KMC716V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K CORPORATION

21 ( 38.1 ) ( 6.35 ) 23KMK 1.8 º HYBRID 23KMK 1.8 º HYBRID W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW P/N L 23KMK2XX 1.65 (42) 23KMK3XX 1.97 (5) 23KMKXX 2.13 (54) 23KMK7XX 2.99 (76) Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) High Torque/ Microstep Number V A ½ gcm mh gcm 2 gcm g 23KMK25V , KMK379V , KMK32V , KMK716V , Model: 23KMK25V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) K 1K 1K Model: 23KMK32V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) (6.5) 2.22 (56.4) 1.85 (47.14) (5.8) CORPORATION K 1K 1K.76 (19.4) 1.85 (47.14) 2.22 (56.4) Model: 23KMK716V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.5 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) LEAD WIRE UL17 AWG (3) MIN.63 (1.59).81 (2.64) BLUE.26 (6.5).187 (4.76) L WHITE.22 (5.5).2 (5.) 1 1K 1K 1K inche (mm

22 LEAD WIRE UL 17 AWG (3) MIN.2 (5).826 (21) BLUE WHITE Number V A ½ gcm mh gcm 2 gcm g 23LQC22V , LQC39V , LQC55V , Note: All models available with rear shafts. Model: 23LQC22V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1.1 (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) (2.64) ( ) 1.85 (47.14) (56.4) (5.8).63 (1.59).187 (4.76) L 23LQC 5 º HYBRID Step Angle... 5º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) 1 1K 1K 1K W.1Y.COM.TW WW.1Y.COM.TW (11) ) ( WW.1Y.COM.TW (19.5) Model: 23LQC39V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 1. (A/WDG) Load Inertia: 161. (gcm 2 ) (N mx1 4 ) LQC 5 º HYBRID 1 1K 1K 1K (N mx1 4 ) P/N L 23LQCXX 2.22 (56.5) 23LQC2XX 1.61 (41.) 23LQC3XX 1.95 (49.5) Model: 23LQC55V Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current: 2. (A/WDG) Load Inertia: 161. (gcm 2 ) 1 1K 1K 1K CORPORATION

23 34PMC 1.8 º HYBRID 34PMC 1.8 º HYBRID W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW P/N L 34PMC1XX 3.69 (93.7) 34PMCXX 2.44 (61.9) Step Angle º Step Angle Accuracy... /5% Temperature Rise... 8º C Max. Ambient Temperature Range... 2º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....2 mm Max. (45 gload) End Play....8 mm Max. (45 gload) Number V A ½ gcm mh gcm 2 gcm g 34PMC , 3.5 1,1. 1,3 2,4 34PMC , 56. 1,1. 1,3 2,4 34PMC , ,4 34PMC , ,4 Note: All models available with rear shafts. Model: 34PMC11 Driver: Dual Chopper Supply Voltage: 35. (Volt) Drive Current: 2.5 (A/PH) Load Inertia: 26.9 (gcm 2 ) (KG CM) K 1K 1K LEAD WIRE UL 3266 AWG (3) MIN 2.74 (69.6) 3.25 (82.6) ( ) (5.5) CORPORATION (N mx1 4 ) (3.2) (85.7) /WHITE.625 (1.59).187 (4.76) GREEN WHITE L (28.62) GREEN/WHITE Model: 34PMC7 Driver: Dual Chopper Supply Voltage: 35. (Volt) Drive Current: 1.25 (A/PH) Load Inertia: 26.9 (gcm 2 ) 1 1K 1K 1K ( )

24 6BJH 18 º PERMANENT MAGNET 6BJH 18 º PERMANENT MAGNET A A B B Step Angle... 18º Step Angle Accuracy... /1º Temperature Rise... 8º C Max. Ambient Temperature Range... 1º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....5 mm Max. (1 gload) End Play....3 mm Max. (1 gload) Number V A ½ gcm mh gcm 2 gcm g 6BJH BJH Note: This size is available in a bipolar winding only. Model: 6BJH5 Driver: Bipolar L/R Drive Dual Step Supply Voltage: 5. (Volt) Drive Current:.25 (A/PH) RUNNING TORQUE (g cm) A.2 (5) (2.2) B 1 A.95 (24) B A 1 A.5 (1.2) View AA 2 x.9 (2.3) ( 1.5.1).4 (1) (x2) (4.5.5) FREQUENCY (pps).16 (4).39 (9.8) Model: 6BJH12 Driver: Bipolar L/R Drive Dual Step Supply Voltage: 12. (Volt) Drive Current: 12. (A/PH) RUNNING TORQUE (g cm).6 (1.5) W.1Y.COM.TW ( 5..5 ) WW.1Y.COM.TW WW.1Y.COM.TW (15) FREQUENCY (pps) CORPORATION

25 8BJH 8BJH 18 º 18 º PERMANENT MAGNET PERMANENT MAGNET W.1Y.COM.TW Step Angle... 18º Step Angle Accuracy... /1º Temperature Rise... 8º C Max. Ambient Temperature Range... 1º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....4 mm Max. (1 gload) End Play....3 mm Max. (1 gload) Number V A ½ gcm mh gcm 2 gcm g Unipolar 8BJH Bipolar 8BJH Model: 8BJH7 Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.19 (A/PH) RUNNING TORQUE (g cm) x.15 (3.8).98.2 (25.5 ) 1.22 (31) WW.1Y.COM.TW WW.1Y.COM.TW FREQUENCY (pps) 2 x.87 (2.2) Model: 8BJH4 Driver: Bipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.35 (A/PH) RUNNING TORQUE (g cm) (6.9.5) ) ( (1.5) (6..5) LEAD WIRE UL 17 AWG 28 CORPORATION (18.3) MAX.2 (.6) BROWN.6 (1.5).79 (2) 11.8 (3) MIN FREQUENCY (pps)

26 R.3 (R 7.5) (3.3.2) 15BAH 15 º PERMANENT MAGNET BROWN 15BAH 15 º PERMANENT MAGNET Step Angle... 15º Step Angle Accuracy... /1º Temperature Rise... 8º C Max. Ambient Temperature Range... 1º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....3 mm Max. (1 gload) End Play....3 mm Max. (1 gload) Number V A ½ gcm mh gcm 2 gcm g Unipolar 15BAH51P BAH73P Bipolar 15BAH43P Model: 15BAH51P Driver: Unipolar Dual Supply Voltage: 24. (Volt) Drive Current:.23 (A/PH) RUNNING TORQUE (g cm) (1) (5.2).2 (1.5).867 (22) MAX.17 (4.1) MAX (1.5).1 (2.5) (42.1).3 (.8) W.1Y.COM.TW Ÿ.35 (9).71 (18 ) ( ) ( ) WW.1Y.COM.TW WW.1Y.COM.TW FREQUENCY (pps).3 (7.5) LEAD WIRE UL 17 AWG 26 Model: 15BAH73P Driver: Unipolar Dual Supply Voltage: 24. (Volt) Drive Current:.4 (A/PH) RUNNING TORQUE (g cm) ( ).217 (5.5) 11.8 (3) MIN FREQUENCY (pps) Model: 15BAH43P Driver: Bipolar Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/PH) RUNNING TORQUE (g cm) FREQUENCY (pps) CORPORATION

27 15BBH 7.5 º PERMANENT MAGNET 15BBH 7.5 º PERMANENT MAGNET P/N L 15BBHXX.867 (2) 15BBH1XX.591 (15) Step Angle º Step Angle Accuracy... /.5º Temperature Rise... 8º C Max. Ambient Temperature Range... 1º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....3 mm Max. (1 gload) End Play....3 mm Max. (1 gload) Number V A ½ gcm mh gcm 2 gcm g Unipolar 15BBH51P BBH73P BBH17P Bipolar 15BBH43P Model: 15BBH51P Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.23 (A/PH) RUNNING TORQUE (g cm) FREQUENCY (pps) Model: 15BBH17P Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.22 (A/PH) RUNNING TORQUE (g cm) (5.2) 1.65 (5.2).4 W.1Y.COM.TW WW.1Y.COM.TW R.3 (R 7.5) WW.1Y.COM.TW 2(3.3.2).4 26 (1) 7.5 Ÿ FREQUENCY (pps).35 (9).71 (18) Model: 15BBH43P Driver: Bipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.8 (A/PH) RUNNING TORQUE (g cm) ( ) (1.5) ( ).6.3 BROWN.3 (7.5) LEAD WIRE UL 17 AWG 26 CORPORATION L (1.5) (.8).17 (4.1) MAX ( ).1 (2.5).217 (5.5) 11.8 MIN (3 MIN FREQUENCY (pps)

28 ) ( ) 17BBH 7.5 º PERMANENT MAGNET RUNNING TORQUE (g cm) ) (42.2 BROWN 17BBH 7.5 º PERMANENT MAGNET Step Angle º Step Angle Accuracy... /.5º Temperature Rise... 8º C Max. Ambient Temperature Range... 1º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....3 mm Max. (22 gload) End Play....3 mm Max. (22 gload) Number V A ½ gcm mh gcm 2 gcm g Unipolar 17BBH262P BBH267P Bipolar 17BBH24P Model: 17BBH262P Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.45 (A/PH) ( ( ) (42.2 ) (35.1 ) FREQUENCY (pps) ( ) (11.5.5) LEAD WIRE UL 17 AWG 26 Model: 17BBH267P Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.3 (A/PH) RUNNING TORQUE (g cm) (1.2.2) (1.2.2 ).31(.8).31(.8).3 (7.5).898 (22.8) MAX W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW ( 43.2 ) (5.5) (3) MIN NOTE: Also available with winged mounting brackets FREQUENCY (pps) RUNNING TORQUE (g cm) Model: 17BBH24P Driver: Bipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.45 (A/PH) FREQUENCY (pps) CORPORATION

29 23BBH 23BBH 7.5 º 7.5 º PERMANENT MAGNET PERMANENT MAGNET Step Angle º Step Angle Accuracy... /.5% Temperature Rise... 8º C Max. Ambient Temperature Range... 1º to 5º C Insulation Resistance... 1M½ Min., 5 VDC Dielectric Strength... 5 VAC for 1 min. Radial Play....3 mm Max. (22 gload) End Play....3 mm Max. (22 gload) Number V A ½ gcm mh gcm 2 gcm g Unipolar 23BBH251P , BBH252P , Bipolar 23BBH246P , Model: 23BBH251P Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.75 (A/PH) RUNNING TORQUE (g cm) FREQUENCY (pps) Model: 23BBH252P Driver: Unipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.32 (A/PH) RUNNING TORQUE (g cm) ( 4.3) ( ) ( ) W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW CORPORATION (1) FREQUENCY (pps) Model: 23BBH246P Driver: Bipolar Chopper Dual Supply Voltage: 24. (Volt) Drive Current:.75 (A/PH) RUNNING TORQUE (g cm) ). ( ( ) LEAD WIRE UL 17 AWG 26 BROWN ( 2.5 ) 1. (25.4) MAX (2.5) (1.6).3 (7.5) ( ).22 (5.5) FREQUENCY (pps) 11.8 (3) M

30 STEP MOTOR CONSTRUCTION The advantage of step motors is that they can operate open loop, that is, they can stop at a predictable angle, rotate clockwise, counterclockwise, and vary speed without feedback. Step motors are electrically commutated, and need either a unipolar or bipolar driver to effect rotation. Hybrid step motors from page 7 to 22 have electromagnetic poles, or phases, located radially around a magnetized rotor. When a phase is energized, it will pull the rotor magnetic pole into alignment. When phases are pulsed in rotation, called a switching sequence (refer to page 31) they create a rotating magnetic stator field. The rotor fields will continue to align themselves, thus causing rotation. Applying potential to one pole is called one pulse. One pulse will move the motor one step. The amount of rotor movement in one pulse is called the step angle. On many of the motors, the step angle is 1.8 degrees. The error on each step is generally quite small, usually /5% as measured from a fitted centerline, and is referred to as step angle accuracy. The step error does not accumulate. The permanent magnet step motors, from page 23 to 28, consist of bobbin wound coils and precision stamping. This construction is easier to assemble, and has a lower cost than hybrid motors. Permanent magnet step motors typically have a larger step angle and lower torque than hybrid motors of the same size. TORQUE AND SPEED MOTOR TERMINOLOGY Motor torque is the product of the motor s generated force, multiplied by the radius from the shaft center from where it is measured. The units are either gramscentimeters (gcm), millinewton meters (mnm) or ounce (ozin). Conversions for these rates, and for moments of inertia, are on page 31. At low pulse rates, the motor has a high torque output, and at high speeds, low torque. MOTOR TERMINOLOGY At a particular high frequency the motor can only generate enough torque to keep the rotor moving. This is the maximum response rate at which the available torque is zero (refer to Figure 1). W.1Y.COM.TW WW.1Y.COM.TW WW.1Y.COM.TW TORQUE SPEED GRAPH TORQUE (gcm) PULSE RATE (pps) Max. Start/Stop Max. Response Rate Frequency To start rotation, some energy is used converting the rotor s inertia from a static to a dynamic state. During this special condition, starting from zero speed, the maximum torque developed is called pull in torque. Pull in torque will decrease as you increase frequency. At some point the torque developed from starting will be zero. This is the maximum start/stop frequency. After reaching constant velocity (synchronism), the motor can be accelerated or slewed up even further to attain higher torque or higher speed. The maximum torque developed from slewing up is called pull out torque. In this catalog, all torque and speed measurements are made at the rated current. If the motor is run at a current higher than the rated current, the torque speed curve will shift up proportionately. However, most of the increase is lost in heat. At a particular high current, the coil temperature will rise to the point at which the insulation is threatened. The maximum temperature rise is the maximum temperature increase the coil can withstand without affecting its insulation. A major advantage of step motors is that with one or more phases left on, the rotor holds its position. If the rotor is forced from this holding position, it will attempt to move back. The maximum restoring torque a motor develops is called holding torque. It is the highest torque the motor can develop. In this catalog, the holding torque is measured at rated current with two phases on. Pull In Torque Pull Out Torque Figure CORPORATION

31 MOTOR TERMINOLOGY MOTOR TERMINOLOGY S Motors are wound to accept current in one direction, a unipolar motor, or in both directions, a bipolar motor. In general, a bipolar motor has more torque than a unipolar motor, except at high speeds. The switching sequences for unipolar and bipolar motors are different, and can be found on page 31. Winding diagrams for unipolar motors can be found on the data sheets. W.1Y.COM.TW WW.1Y.COM.TW To increase torque, motors can be run with two phases on simultaneously. This drive mode is called dual phase or two phase on. Motors can also be run single phase. A combination of both is called half step mode. Half step mode results in a rotor movement of one half the step angle, for example, from 1.8 degrees to.9 degrees. Further, by partially turning phases on and off you can continue to reduce the step angle. This drive mode is referred to as microstepping. MOTOR SELECTION Motor selection usually begins with determining the torque required. Since step motors run open loop, you need to know beforehand what the maximum torque required is. During any duty cycle, the load torque varies. Usually, the highest torque requirement is in accelerating the load from at rest to a set speed. The following variables must be known to determine the torque required to accelerate a load: Motor Speed (pps) accelerating from Motor Speed (pps) accelerating to Rotor Inertia (gcm 2 ) Load Inertia (must be less than 1X rotor inertia) Step Angle (degrees) The acceleration component of the load, plus frictional loads, can be calculated as follows: T a = aj T f Where: T a = Torque required to accelerate (gcm) a = Angular acceleration (radians/sec 2 ) J = Total inertia (gcm sec 2 ) T f = Friction torque (gcm 2 ) Inertia will include both load inertia and rotor inertia. Acceleration must be converted from radians per second to steps per second. Converting for these factors we get: Where: WW.1Y.COM.TW T a = (J m J 1 ) x (f 2 f 1 ) (2 q) Æt x 36º J m = Motor rotor inertia (gcm sec 2 ) J 1 = Load inertia (gcm sec 2 ) f 2 f 1 = = Ending (high speed) frequency (pps) Starting frequency (pps) Æt = Time for acceleration (sec) CORPORATION DETERMINING TORQUE NEEDS Figure 2 LOAD J 1 = 15 gcm 2 continued MOTOR For example, assuming the assembly in Figure 2, what is the required torque to accelerate the load in.1 seconds from to 1, pps? For this example, we estimate the torque required for the load only, and input the acceleration of gravity into the inertia moment by dividing it by 98 cm/sec 2. From this we get: T a = 15 gcm 2 x (1pps)2 x 1.8º 98 cm/s 2.1 sec x 36º = 52 gcm To accelerate the load we would need at least 52 gcm of torque, plus about 25% more for the motor rotor. An additional 51% is recommended as a safety margin, in case of load variance or worn parts. The total is about 13 gcm at 1, pps. If a small step angle is required, a 14PM on page 7 has ample torque.

32 CONVERSION TABLES CONVERSION TABLES ROTARY INERTIA CONVERSION TABLE To convert from A to B, multiply by entry in table. B gcm 2 ozin 2 gcms 2 Kgcm 2 lbin 2 ozins 2 lbft 2 Kgcms 2 lbins 2 lbfts 2 A or slugft 2 gcm x x x x x x x x 1 8 W.1Y.COM.TW ozin x x x x x 1 5 WW.1Y.COM.TW gcms x x x x 1 5 Kgcm x x x x x 1 5 WW.1Y.COM.TW lbin x x x x x x 1 4 ozins x x x x 1 3 lbft x x 1 2 Kgcms x x x 1 2 lbins x x x x x 1 2 lbfts or x x x x x slugft 2 TORQUE CONVERSION TABLE To convert from A to B, multiply by entry in table. A B gcm ozin Kgcm lbin Nm lbft Kgm gcm x x x x ozin x x x x x 1 4 Kgcm x x lbin x x x 1 2 Nm 1.19 x lbft x Kgm x SWITCHING SEQUENCE TABLES For clockwise rotation facing the mounting side. Dual Phase Excitation Step A B A 1 B 1 Common Bipolar Dual Phase Step A B A 1 B ORDERING INFORMATION AND WARRANTY WARRANTY NMB Corporation motors are warranted to be free of defects in materials and workmanship for a period of one year from date of delivery. APPLICATION ENGINEERING For application engineering consultation, contact your local NMB Corporation Sales Office to receive prompt assistance. SPECIFICATIONS NMB Corporation reserves the right to change specifications and prices without notice as required to permit improvements in motor design. INVENTORY This catalog is a technical guide for the designer of products using stepping motors. Please contact your local NMB Corporation Sales Office for information on the availability of specific stepping motors and drive characteristics listed herein. Most stepping motors shown here were manufactured to specific applications and thus are not available from inventory. NMB can modify any motor in this catalog to meet your particular requirements CORPORATION