1 Stepper Motors. 2 Click once to show video 3 HOW CAN WE INCREASE THE RESOLUTION, OR STEPS, OF A MOTOR? 1.Increase the number of stationary electro.

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Presentation transcript:

1 Stepper Motors

2 Click once to show video

3 HOW CAN WE INCREASE THE RESOLUTION, OR STEPS, OF A MOTOR? 1.Increase the number of stationary electro magnets in the outer stator 2.Increase the number of poles in the rotating rotor

4 Example: Six pole rotor, four electro magnets.

5 STEPPER MOTOR OPERATION How to make the rotor spin Rotor Stator coils CNC Stepping Motor

6 The top electromagnet (1) is turned on, attracting the nearest teeth of a gear- shaped iron rotor. With the teeth aligned to electromagnet 1, they will be slightly offset from electromagnet 2 The top electromagnet (1) is turned off, and the right electromagnet (2) is energized, pulling the nearest teeth slightly to the right. This results in a rotation of 3.6° in this example.

7 The bottom electromagnet (3) is energized while electromagnet (2) is turned off; another 3.6° rotation occurs. The left electromagnet (4) is energized, rotating another 3.6°. When the top electromagnet (1) is again enabled, the teeth in the sprocket will have rotated by one tooth position; since each step is 3.6° it will take 100 steps to make a full rotation in this example.

8 HOW CAN WE INCREASE THE SPEED THE MOTOR ROTATES AT? 1.Increase the rate at which we switch the magnets on and off

9 THE END