1. The Wonder of Step Motors By: Sara Vossoughi Ryerson University Department of Computer Science http://scs.ryerson.ca

2. Step Motors: Look Ma, No Brushes!

3. Internal Mechanics Step-by-step mechanisms Blue electromagnet is energised in each step The size of the teeth determine the arc angle of the turn. More teeth = more steps per rotation = more acuracy Brush-Free

4. Logic Component A driver is needed to take care of the logic for the operation of the driver. The driver requires programming Usually connected via RS-232 protocol (serial cable) [3-wire setup only allows for half-duplexing]

5. Communications Example shows a full-duplex communication interface setup with an RS-485 interface The device is a Motor+Driver Combo

6. Analog Control

7. Common Applications CNC Machine Machine Lathe Robots with movings parts (arms) A 3-motor setup could allow a robotic arm to measure environmental data at any point in a room. (positioning system)

8. Homemade CNC Machine

9. Mechanical Cube Solver http://www.youtube.com/watch?v=3QOvEG27Gt4

10. Sources Intelligent Motion Systems, Inc. Operating Instructions for : Mdrive Motor + Driver - Motion Control. Sizes 17, 23 & 34 Stepper 4-image GIF: http://en.wikipedia.org/wiki/Stepper_motor Homemade CNC machine: Woodwork Forums: http://www.woodworkforums.com/f170/homemade-cnc- router-23000/index6.html http://www.woodworkforums.com/f170/homemade-cnc- router-23000/index6.html Stepper motor and driver image http://fred.unis.no/StampII3Mx/Default.htm