How to Control AC Servo Speed

Install the Hardware

• 1

  Connect a standard 9-pin male-to-female serial cable to your computer serial port. The serial port might also be labelled as a COM port.

• 2

  Connect the other end of the serial cable to the ICD2-Tiny PIC programmer. "ICD2-Tiny" is a reduced size version of the ICD2 programmer. ICD stands for "In-Circuit Debugger." The programmer also has an "ICSP" connector to attach the programmer to the development board.

• 3

  Connect the ICSP cable to the development board, and attach the 15-volt power supply to the board.

Program the PIC

• 4

  Create a simple program that will turn bit "0" of port "A" off and on every .3 seconds. Copy the PHP code snippet below in a Notepad or word processing document:

  #include <p18f452.h>
  #include <delays.h>
  void main(void){
  TRISA = 0x00;
  PORTA = 0x00;

  while(1){
  PORTA = 0x01;
  Delay10KTCYx(150);
  PORTA = 0x00;
  Delay10KTCYx(150);
  }
  }
  « End Code »

• 5

  Compile and program the PIC with the code in Step 1.

• 6

  Enter the DSP control software into the host computer to read the motor control code.

Connect a Host to the PIC

• 7

  Download software to run the AC servo motor. MPLAB is an example to illustrate the process. Open the Project Wizard to begin the software configuration. Click "Next."

• 8

  Choose your device from the list. In this case, it is the PIC controller. Once finished with the choices, click "Next."

• 9

  Name and save your project. MPLAB provides a summary screen at various steps to recap what has been chosen. Click "Finish" to configure your project with the listed parameters.

• 10

  Open this saved file and choose the PIC programmer again from the drop-down list.

• 11

  Choose the COM port on the computer and click "Next."

• 12

  Download the specific customized operating system for you hardware, verify the system configuration and click "Finish" to save the customized operating system that will run the AC servo motor.