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# Mpmc b1

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# Mpmc b1

case studies on 8086

case studies on 8086

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### Mpmc b1

1. 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. 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. 3. Contents  Stepper motor  Stepper motor windings  Winding arrangement  Protection of winding  Stepper motor design  Interfacing program  Hardware circuit  Conclusion  References 3
4. 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. 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. 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. 7. Stepper motor windings 7
8. 8. Stepper motor rotor 8
9. 9. Winding arrangement 9
10. 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. 11. Protection of winding 11
12. 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 0 0 0 2 0 1 0 0 3 0 0 1 0 4 0 0 0 1 5 1 0 0 0 12
13. 13. Stepper motor design Motion step A B C D Anticlockwise 1 1 0 0 0 2 0 0 0 1 3 0 0 1 0 4 0 1 0 0 5 1 0 0 0 13
14. 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. 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. 16. Hardware circuit 16
17. 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