OBJECTIVES:
To demonstrate the Clockwise / Anti-clockwice stepped motions, single step of a stepper motor using 8085 microprocessor.
To run it in a continuous motion (free running) in CW / ACW direction under program control using 8085 microprocessor
DESCRIPTION:
An exhaustive instruction manual is supplied with the unit explaining in detail the principle of stepper motors, procedure for conducting the experiments and interpretation of the results. The details of application software are also included. with this . This experimental set-up aims at providing an exposure to the basic operation of a stepper motor, its drive and logic, and limitations as far as the internal dynamics is concerned. Experiments have been designed to demonstrate the effect of external load – inertial and frictional, on the motor performance. Provisions are available for free running mode as well as manual mode.
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TECHNICAL SPECIFICATIONS:
STEPPER MOTOR:
Single stepping and free running modes of operation with speed variation and direction reversal - internal TTL circuit.
360° motion Servo-Potentiometer position-pickup for motor dynamics
Operation through microprocessor kit – sample control programs provided
Torque: 2.8 Kg-cm
Step angle: 1.8°
Power: 12V, 1A/phase
220V±10%, 50Hz mains operation
Complete in all respects, except a measuring CRO
TECHNICAL SPECIFICATIONS OF THE µP KIT SUPPLIED:
Microprocessor: 8085A.
Memory: 64KB on board, consisting of 32K EPROM and 32K RAM. No expansion required.
Display: 6 nos. of High bright 7 segment displays.
Keys: 24 feather touch re-programmable keys.
Store and edit your program, Examine / alter any memory location
Increment / Decrement an address and view the contents
Move a block of memory from one place to other, (this will not change address of conditional or unconditional branch address in the moved block) Input/output: 24 TTL I/O lines only, terminated on 50 pin FRC.
Built-in Power supply
LIST OF EXPERIMENTS :
Study of manual stepping through push button switches - It would enable the student to appreciate one to one correspondence between the number of steps and shaft movement.
A 360° calibrated dial is used for the measurement of step angle•
Study of speed and direction control logic by recording the pulse sequence for both clockwise and counter clockwise motions
Study of resonance effect at various speeds – it provides an idea of the dynamic behaviour of the motors
Programming the microprocessor kit to implement various features like direction, speed, prescribed angle of rotation, prescribed number of steps or an arbitrary motion
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