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Motion Control Applications & Advisory Stepper Motors Selection Procedure 1. 2. 3. 4. 5. 6. Determining the drive mechanism component Determine the mechanism and required specifications Calculate the required resolution Find the step angle resolution for the motor Determine the operating pattern Determine the operating pattern that fulfills the required specifications Calculate the required torque Calculate load torque Calculate acceleration torque Calculate required torque Select motor Make a provisional selection of a motor based on required torque. Determine the motor to be used from the speed-torque characteristics. Check the selected motor Confirm the acceleration/deceleration rate and inertia ratio. Selection Complete Samples Stepper Motor Applications Dovetail Stepping Motor Print AC Motor First, determine certain features of the design, such as mechanism, rough dimensions, distance moved, and positioning period. From the required resolution, determine whether a motor only is to be used or whether a geared motor is to be used. Find the acceleration (deceleration) period and operating pulse speed in order to calculate the acceleration torque. Calculate the load torque and acceleration torque and find the required torque demanded by the motor. Select a motor whose speed-torque characteristics satisfy the requirement. Check the acceleration/deceleration rate and inertia ratio in order to determine the suitability of the selection * If you have trouble selecting the right motor, please contact NetMotion for further assistance sales@netmotion.com or call 1-800-790-7837 X-Y Table Constant Flow Pump Index Table Ball Screw Stepping Motor Stepping Motor Stepping Roller Worm Gear 4 Order is Easy! Call Us Today 1-800-790-7837 or E-Mail: Sales@NetMotion.com WWW.NETMOTION.COM Tube Worm Stepping Motor Printer Photo Typesetting Wire Cutter Ink ribbon Platen Character Font Mirror Lens Mirror Lens Lamp X-Scale Stepping Motor Printing Y-Scale Stepping Motor Wire Bobbin Drive Motor Feed Roller Cutter Cam
Servo -vs- Stepper Stepper motors are permanent magnet motors that 'Step' one increment each time the computer gives its control electronics one pulse. They don't require position feed back if run within their limits. When stopped they inherently hold their position. Servo motors are standard DC or Brushless motors with an encoder feedback loop. The computer reads the position of the motor and controls the power applied to the motor. Stepper motors generally are just as accurate as servos and are simpler and more reliable and maintenance free in harsh dusty applications. The Servomotor's encoder is susceptible to dirt and vibration causing problems. Servo's are faster moving point to point and are better at accelerating very heavy machinery, but their higher maintenance should be a factor in deciding which to go with. Our stepper motor system can be just as fast or faster than many servo systems because of the control software's algorithms. Many companies that sell servo controls try to run steppers down. They don't know how good a properly made stepper motor system can be! Our stepper systems never loose steps and can run for days with perfect repeatability. A Servo system with dust on the encoder will loose steps! Characteristics of Servo and Stepper Motors MotionCharacteristicsServoMotors Ste ppe r Moto rs Hig h Torq ue, Low Spe ed Hig h Torq ue ( > 200 0 rpm) and Hig h Spe ed Sho rt, Rap id Rep etitiv e Move s Pos itio nin g App lica tion s App lica tion s in Haz ard ous Env iron men ts. Low Spe ed, Hig h Smo oth nes s C ontr ol Meth od Examples of Servo Motor Applications Can be cons ide red if cos t/ comp lexi ty is not an iss ue. Conti nuous duty apli catti ons requi ring high torq ue and low spe ed. Conti nuous duty app lica tio ns requi ring high If spe eds are less than 200 0 rpm step per may torq ue and high spe ed. A DC servo moto r can be eco nomi cal. Step per bec omes bulky at deli ver grea ter conti nuous shaft powe r at high highe r torq ue. spe eds comp ared to step pers . Hig h spe ed up to 120 00 rpm is pos sib le. AC servo - moto rs can handle highe r curre nt surge s comp ared to DC Servo s. You can get lot stro nger AC servo comp ared to eithe r DC servo or DC step per. Use servo if you need high dynami c Step per will offe r more eco nomi c soluti on requi reme nts. when requi reme nts are more mode st. Servo can handle effe cti vely when load is Use Step per moto r if torq ue is lowe r than 500 mostl y inert ia inste ad of fric tio n. The abi lity to oz-i n, less 200 0 rpm, low to medi um overd rive servo moto r in inte rmi ttent duty acc elera tio n rate s. allo ws a small er moto r to be used . If pos iti oni ng is cri tica l in mic ron level use servo . U se Brushle ss servo moto r. Use step moto r. A. B. C. U se DC servo . Use mic roste ppi ng. Clo sed loop . Pre ferre d to be used in ope n loop app lica tio ns. A. Forming Machine B. Servo-Press Machine C. Microarray Staining Machine We Do Price Matching! Call Us Today 1-800-790-7837 or E-Mail: Sales@NetMotion.com WWW.NETMOTION.COM 5
Page 1 and 2: NetMotion, Inc. www.netmotion.com S
Page 3: MOTION CONTROL We can help you with
Page 7 and 8: DC Brushless Servo System Servo Mot
Page 9 and 10: 9 We Do Price Matching! Call Us Tod
Page 11 and 12: Stepper Motor Drivers PLC, Joystick
Page 13 and 14: Linear Actuators / Slides Actuators
Page 15 and 16: Uninterruptible Power Supplies Low
Page 17 and 18: Fluid Handling Applications & Advis
Page 19 and 20: Fluoroplastic Tube Fittings Compres
Page 21 and 22: Contamination- Free Pressure Sensor
Page 23 and 24: Wet Process Products & Applications
Page 25 and 26: WAFER & PRECISION PARTS HANDLING Ma
Page 27 and 28: Vacuum Wands for Wafers Vacuum Wand
Page 29 and 30: Wand Kits for Precision Parts Handl
Page 31 and 32: CUSTOM PARTS & LABORATORY SUPPLIES
Page 33 and 34: More Information On Bemcot Wipers 1
Page 35 and 36: Custom Plastics, Ceramics & Blow Mo
Page 37 and 38: Wand Kits for Precision Parts Handl
Page 39 and 40: OTHER PRODUCTS Having trouble findi
Page 41 and 42: Wafer Containers, Canisters and Jar
Page 43 and 44: PEEK TM Metric Screws PEEK TM Polym
Page 45 and 46: High-Resolution Digital Camera Syst
Page 47 and 48: Contact Us General Terms & Conditio

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