This document provides an overview of different types of motors, including stepper motors and servos. It discusses the advantages and disadvantages of stepper motors, describes different types of stepper motors including permanent magnet, variable reluctance, and hybrid steppers. It also covers the theory of operation, switching sequences for full, half, and microstepping, and some applications of stepper motors such as in printers, transport, and wafer slicing. Servo motors are also briefly mentioned.

1. Motor Fundamental

2. Motor Fundamental Motor Outline Stepper Motor Servo Motor Agenda

3. Motor Outline DC Motor/Synchronous Motor / Induction Motor

4. Motor Fundamental Stepper Motor Agenda Advantage Disadvantage Type of Stepper Motors Theory of Operation Switching Sequence Linear Stepper Motors Application

5. Stepper Motor Low Cost Excellent Torque Holding Low Maintenance(Brushless) Very Rugged (Any Environment) No Tuning Required Advantage

6. Stepper Motor Rough Performance at Low Speed Consume Current Regardless of Load Limited Sizes Available Noisy Torque Decreases with speed Stall or Lose Position Running without a Control Loop Disadvantage

7. Stepper Motor Type of Stepper Motors Permanent Magnet Variable Reluctance Hybrid

8. Stepper Motor Brushless Relative Low Torque Teeth Offset Thin-Disk Rotor (Stator Offset?) Permanent Magnet

9. No Permanent Magnet Numbers of Steps : (Ns - Nr)/(Ns*Nr) Ns: number of teeth in stator core Nr: number of teeth in rotor core Single Stack / Multi Stack Stepper Motor Variable-Reluctance Stepper Motor

10. Consist of two pieces of soft iron, round PM Bifilar Stepper Motor Hybrid

11. Stepper Motor Unipolar Bipolar Free Wheeling Drive

12. Stepper Motor Theory of Operation

13. Stepper Motor Full Step Switching Sequence

14. Stepper Motor Half Step Switching Sequence

15. Stepper Motor Micro Step Switching Sequence

16. Linear Stepper Motors

17. Stepper Motor Coil Wind Transport Wafer Printer Wafer Slicing Application

18. Servo With Feedback SCR / Transistor Issue Cooling Fan

19. Servo

20. Servo