STEPPER MOTOR CONTROL USING PLC <ul><li>PREPARED BY: </li></ul><ul><li>BRINDA TALATI </li></ul><ul><li>ZALAK SHAH </li></u...
NAME: SERVILINK ENGINEERS  PVT.LTD  ADDRESS: 988/16/1, GIDC, MAKARPURA, BARODA-10. GUIDED BY: ANANT PARIKH LOGO:
A stepper motor is a brushless, electric motor that can divide a full rotation into a large number of steps. The motor’s p...
OPERATION OF STEPPER MOTOR <ul><li>Stepper motors have multiple “toothed” electromagnets around a centre gear shaped piece...
<ul><li>So when the next electromagnet is turned on and the first is turned off, the gear rotates slightly to align with t...
Stepper motor Types Permanent magnet  Hybrid Synchronous Variable reluctance/ unipolar
Characteristics of stepper motor <ul><li>Stepper motor are constant power devices. </li></ul><ul><li>As motor speed increa...
Application of stepper motor As stepper motors are digitally controlled and more rugged so they are also used in packaging...
WHAT IS PLC? <ul><li>PLCs are often defined as miniature industrial computers that contain hardware and software that is u...
<ul><ul><li>The CPU, which controls all PLC activity, can further be broken down into the processor and memory system. The...
WHY PLC? <ul><li>Today's PLCs offer faster scan times, space efficient high-density input/output systems, and special inte...
PLC’S AVAILABLE IN MARKET <ul><li>SIEMENS </li></ul><ul><li>ATMEL </li></ul><ul><li>OMRON </li></ul><ul><li>ALLEN BRADLEY ...
SPECIFICATIONS OF CPU 226 PARTICULARS SPECIFICATIONS Supply voltage max 264 VAC Supply voltage min 85 VAC Analogue input/o...
LADDER DIAGRAM <ul><li>A Ladder Diagram is one of the simplest methods used to program a PLC. It is a graphical programmin...
BLOCK DIAGRAM
LOGIC TABLE Counter clockwise Clockwise STEP WINDING 1  WINDING 2 WINDING 3 WINDING 4 1. 1 0 0 1 2. 1 1 0 0 3. 0 1 1 0 4. ...
STEPPER MOTOR STEP ANGLES rpm x steps per revolution 60 Steps per second = STEP ANGLE STEPS PER REVOLUTION 0.72 500 1.8 20...
THANK YOU
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stepper motor

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stepper motor

  1. 1. STEPPER MOTOR CONTROL USING PLC <ul><li>PREPARED BY: </li></ul><ul><li>BRINDA TALATI </li></ul><ul><li>ZALAK SHAH </li></ul><ul><li>SOMYA SINGH </li></ul><ul><li>GUIDED BY: </li></ul><ul><li>ASST. PROF. DEEPA </li></ul><ul><li>KARVAT </li></ul>
  2. 2. NAME: SERVILINK ENGINEERS PVT.LTD ADDRESS: 988/16/1, GIDC, MAKARPURA, BARODA-10. GUIDED BY: ANANT PARIKH LOGO:
  3. 3. A stepper motor is a brushless, electric motor that can divide a full rotation into a large number of steps. The motor’s position can be controlled precisely without any feedback mechanism. What is Stepper motor?
  4. 4. OPERATION OF STEPPER MOTOR <ul><li>Stepper motors have multiple “toothed” electromagnets around a centre gear shaped piece of iron. </li></ul><ul><li>The electromagnets are energized by an external control circuit,such as a microcontroller or plc. </li></ul><ul><li>To make the motor shaft turn,first,one electromagnet is given power which makes the gear’s teeth magnetically attracted to the electromagnets teeth. </li></ul><ul><li>When the gear’s teeth are aligned to the first electromagnet,they are slightly offset from the next electromagnet. </li></ul>
  5. 5. <ul><li>So when the next electromagnet is turned on and the first is turned off, the gear rotates slightly to align with the next one, and from these the process is repeated. </li></ul><ul><li>Each of those slight rotations is called a “step” with an integer number of steps making a full rotation. </li></ul><ul><li>In that way, the motor can be turned by a precise angle. </li></ul>
  6. 6. Stepper motor Types Permanent magnet Hybrid Synchronous Variable reluctance/ unipolar
  7. 7. Characteristics of stepper motor <ul><li>Stepper motor are constant power devices. </li></ul><ul><li>As motor speed increases torque decreases. </li></ul><ul><li>Stepper motor exhibits more vibration than other motor types, so this makes more noiser than DC motor. </li></ul><ul><li>This vibration can become very bad at some speed and cause the motor to lose torque or lose direction </li></ul><ul><li>This effect can be controlled by using a micro stepping driver. </li></ul>
  8. 8. Application of stepper motor As stepper motors are digitally controlled and more rugged so they are also used in packaging machinery .
  9. 9. WHAT IS PLC? <ul><li>PLCs are often defined as miniature industrial computers that contain hardware and software that is used to perform control functions. A PLC consists of two basic sections: the central processing unit (CPU) and the input/output interface system. </li></ul>A PLC can also be defined as “A digitally operating electronic apparatus which uses a programmable memory for the internal storage of instructions by implementing specific functions such as logic sequencing , timing, counting, and arithmetic to control, through digital or analog input/output modules, various types of machines or processes”.
  10. 10. <ul><ul><li>The CPU, which controls all PLC activity, can further be broken down into the processor and memory system. The input/output system is physically connected to field devices (e.g., switches, sensors, etc.) and provides the interface between the CPU and the information providers (inputs) and controllable devices (outputs). </li></ul></ul>
  11. 11. WHY PLC? <ul><li>Today's PLCs offer faster scan times, space efficient high-density input/output systems, and special interfaces to allow non-traditional devices to be attached directly to the PLC. </li></ul><ul><li>They can communicate with other control systems, they can also perform reporting functions and diagnose their own failures, as well as the failure of a machine or process. </li></ul><ul><li>Small, non-modular PLCs (also known as fixed I/O PLCs) generally have less memory and accommodate a small number of inputs and outputs in fixed configurations. Modular PLCs have bases or racks that allow installation of multiple I/O modules, and will accommodate more complex applications. </li></ul>
  12. 12. PLC’S AVAILABLE IN MARKET <ul><li>SIEMENS </li></ul><ul><li>ATMEL </li></ul><ul><li>OMRON </li></ul><ul><li>ALLEN BRADLEY ROCKWELL </li></ul><ul><li>ABB </li></ul><ul><li>FUJITSU </li></ul><ul><li>FESTO </li></ul><ul><li>ATOS </li></ul><ul><li>MITSIBUSHI </li></ul>
  13. 13. SPECIFICATIONS OF CPU 226 PARTICULARS SPECIFICATIONS Supply voltage max 264 VAC Supply voltage min 85 VAC Analogue input/output 0-10 Volts No. of digital inputs 24 No. of digital outputs 16 (Transistor) DC voltage input/output 24 VDC Current mode: 2 mA – 10mA Sourcing current 750 mA for logic - ‘1’ For use with SIMATIC S7-200 CPU
  14. 14. LADDER DIAGRAM <ul><li>A Ladder Diagram is one of the simplest methods used to program a PLC. It is a graphical programming language developed from electrical relay circuits. </li></ul><ul><li>RUNG </li></ul><ul><li>COIL </li></ul><ul><li>CONTACTS </li></ul>COIL CONTACTS RUNG
  15. 15. BLOCK DIAGRAM
  16. 16. LOGIC TABLE Counter clockwise Clockwise STEP WINDING 1 WINDING 2 WINDING 3 WINDING 4 1. 1 0 0 1 2. 1 1 0 0 3. 0 1 1 0 4. 0 0 1 1
  17. 17. STEPPER MOTOR STEP ANGLES rpm x steps per revolution 60 Steps per second = STEP ANGLE STEPS PER REVOLUTION 0.72 500 1.8 200 2.0 180 2.5 144 5.0 72 7.5 48 15 24
  18. 18. THANK YOU

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