An Approach of Micro-stepping Control for the Step Motors Based on FPGA

Abstract

In this paper, for improving the control system of some bio-chemistry analysis instrument, an approach of microstepping control for the step motors based on Field Programmable Gate Array (FPGA) is presented after the microstepping driving theory of the step motor with a constant torque was discussed deeply. And then the relative control system is schematically designed, mainly includes the internal logic design of the FPGA, the Communication interface design of the Microcomputer, the design of the power driving circuit, and the design of the interface circuit between the electrical sources. At last, it is verified by some experimental investigations that the control theory and approach presented in the paper are corrective, and the control system designed is very good to get a high precision of position control and high control repeatability. So the technology questions from the producing reality are resolved and the product quality is promoted.

Design of Control System of Acceleration and Deceleration of Stepper Motor Based on ATMEGA128

“…Then start the timer of ATMEGA128, using CTC mode, timer interrupt is generated according to the profile of speed, and interrupt call function sends pulse to move stepper motor. In the interrupt function, calculate parameters that timer needed and transmit frequency of pulse [3]. The use of state machine, the state of stepper motor can switch in the accelerated phase, uniform phase, deceleration phase and stopping phase.…”

Implementation of High Performance Microstepping Driver Using FPGA with the Aim of Realizing Accurate Control on a Linear Motion System

“…When the closed-loop driver is employed with a DSP via C language, the coding and debugging are straightforward. For such uses it is possible to use FPGAs, where we can unite software and hardware solutions to get better performances because of the parallel computing architecture of the FPGA [1][2][3]. By means of this technique, the programming and debugging are more challenging.…”