This low cost distributed motion controller system consists of two units: a USB-CAN converter and a dual axis controller. The USB-CAN converter uses the PIC18F258 and a FTDI FT245BM USB interface chip to translate messages between the USB and CAN buses. While PIC18F458-based dual axis controller is kept busy implementing servo/stepper trajectory and PID calculations every 500 usec to control 2.5A/phase stepper and a 2.5A DC servo.
This project shows you how to construct a PCB drill machine driven by a master-controller board and three stepper motor driver boards. These four single sided PC boards each contain an Atmega16/32 microcontroller. Communication between the boards is performed using the RS485 protocol with all communication initiated by the master-controller. The PCB drill machine firmware is completely written in Bascom-AVR.
This project is the implementation of a low-cost, high-performance bipolar stepper motor driver. This driver was designed for the hobbyist who is retrofitting a piece of equipment for CNC operation using one of the inexpensive and readily available interpreter programs. Generally speaking, these programs are capable of reading the GCode output from a CAM program and outputting step and direction signals to the parallel port. It is the function of the driver built in this project to receive these step and direction signals and control a stepper motor based upon them.
The Telescope Focus Controller was designed to allow computer control of the telescope focus position through a serial port. It also allows manual control through clockwise and counter-clockwise buttons on the telescope’s keypad. To turns the focus shaft of a telescope, The project use stepper motor to do it. The project consist of microcontroller ATmega8 as main processor, MAX232A for serial communication, and DS18B20 temperature compensation of focus position.
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