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The Wonder of Step Motors

The Wonder of Step Motors. By: Sara Vossoughi Ryerson University Department of Computer Science http://scs.ryerson.ca. Step Motors: Look Ma, No Brushes!. Internal Mechanics. Step-by-step mechanisms Blue electromagnet is energised in each step

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The Wonder of Step Motors

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  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 • Stepper motor and driver image http://fred.unis.no/StampII3Mx/Default.htm

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