Mpmc b1

case studies on 8086

1. A Case Study on CASE STUDY ON STEPPER MOTOR Presentation by: Ravada Tarun Kumar (17981A04I2) Thadi Prem Kumar (17981A04K4) Bikkina Mahesh (18985A0428) S Dileep Kumar (17981A04I7) Department of Electronics & Communication Engineering RAGHU ENGINEERING COLLEGE Visakhapatnam-531162 1

2. Question Design the stepper motor interfacing with 8086 using the following specifications A) Identify the components required for the application B) Give the design (Block diagram and schematic diagrams) C) Develop the program using 8086 assembly language D) Show the output using Kit/Simulation tool 2

3. Contents Stepper motor Stepper motor windings Winding arrangement Protection of winding Stepper motor design Interfacing program Hardware circuit Conclusion References 3

4. Stepper motor It is a device used to obtain an accurate position control of rotating shaft. The rotation of the shaft will be in the terms of steps. To rotate the shaft of the stepper motor, a sequence of pulses is needed to be applied to the winding of the stepper motor, in proper sequence. The number of pulses required for one complete rotation of the shaft of the stepper motor are equal to its number of internal teeth on rotor. 4

5. Stepper motor The stator teeth and rotor teeth lock with each other to fix a position of the shaft. With pulse applied to the winding input, the rotor rotates by one teeth position or an angle ‘x’. The angle ‘x’ may be calculated X = 360 degrees No.of rotor teeth 5

6. Stepper motor The typical stepper may have parameters like torque 3kg-cm, operating voltage 12v, current rating 0.2A and a step angle 1.8 degrees. 6

7. Stepper motor windings 7

8. Stepper motor rotor 8

9. Winding arrangement 9

10. Protection of winding We have to protect the winding of stepper motor. Parallel to the winding ‘a’, they connected a diode. When the excess currents flows through that winding then that diode will break down and the large current will flow through that diode and that winding ‘a’ will be protected. The reason is that the current will always offer a low resistance path. 10

11. Protection of winding 11

12. Stepper motor design We are going to design a stepper motor controller and writing a ALP to rotate shaft of a 4-phase stepper motor. In clock 5 rotations and in anticlockwise 5 rotations. Motion step A B C D clockwise 1 1 2 1 3 1 4 1 5 1 12

13. Stepper motor design Motion step A B C D Anticlockwise 1 1 2 1 3 1 4 1 5 1 13

14. Interfacing program ASSUME CS : CODE CODE SEGMENT START: MOV AL,80H OUT CWR,AL MOV AL,88H MOV CX,1000 AGAIN1: OUT PORT A,AL CALL DELAY ROL AL,01 DEC CX JNZ AGAIN1 MOV AH,88H MOV CX,1000 14

15. Interfacing program AGAIN2: OUT PORT A,AL CALL DELAY ROR AL,01 DEC CX JNZ AGAIN2 MOV AH, 4CH INT 21H CODE ENDS END START 15

16. Hardware circuit 16

17. Conclusion In this way we can Design a stepper motor interfacing with 8086 using the following specifications A) Identify the components required for the application B) Give the design (Block diagram and schematic diagrams) C) Develop the program using 8086 assembly language D) Show the output using Kit/Simulation tool 17

18. References https://www.google.com/search?q=steppermotor&aps+chrome..69i57j0I3.1323j0j7&client=ms-android- vivo&sourceid =chrome- mobile&ie =UTF-8 https://www.google.com/search?q=intefacing&aps+chrome..69i57j0I3.1323j0j7&client=ms-android- vivo&sourceid =chrome- mobile&ie =UTF-8 https://www.google.com/search?q=simulation techniques&aps+chrome ..69i57j0I3.1323j0j7&client=ms-android- vivo&sourceid =chrome- mobile&ie =UTF-8 18

19. THANK YOU 19