CoAutomation Recent Projects
Low-cost Servo Motor Speed Controller for industrial conveyor system
The Problem:
Create a simple, low-cost speed controller for an oven conveyor belt.
The Solution:
Sometimes the problem (and solution) is so simple, off-the-shelf products are overkill.
In this case, our oven controller client (see below) wanted to save a hundred dollars by replacing the
motion controller for the oven conveyor belt with a simple circuit.
Controlling belt speed is much easier than full motion control.
Using a low-cost 8051-type microcontroller, we programmed a Proportional-Integral algorithm for speed control.
One phase of the servo's quadrature encoder was connected to an internal counter to count the feedback pulses.
An internal timer was used to generate a PWM signal that travels through a low-pass filter and analog amplifier
to produce a 0-10V output to control the servo motor driver.
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