ABB Tension Controller PFTL101B 10KN 3BSE004197R1

Advantages and disadvantages of motion controllers

Advantages of motion controllers:

(1) The hardware composition is simple. The system can be formed by inserting the motion controller into the PC bus and connecting the signal lines.

(2) Development can be carried out using the rich software already available on PCs;

(3) The motion control software has good code universality and portability;

(4) There are many engineers who can carry out development work, and they can carry out development without much training.

Disadvantages of motion controllers:

(1) The motion controller with board structure uses gold finger connection and is fixed on one side. In most industrial sites with poor environment (serious vibration, dust and oil pollution), it is not suitable for long-term operation.

(2) Waste of PC resources. Due to the bundled sales of PCs, users actually only use a small portion of the PC resources. The unused PC resources not only cause idleness and waste, but also bring maintenance troubles.

(3) Overall reliability is difficult to guarantee, as the PC can be either an industrial PC or a commercial PC. After system integration, the reliability varies greatly and cannot be guaranteed by the motion controller.

(4) It is difficult to highlight the characteristics of the industry.

Functions of motion controller

1. Exercise planning function

In essence, these are the reference quantities that determine the velocity and position of the motion. Appropriate reference quantities not only improve the accuracy of the trajectory but also reduce the requirements on the rotational system and mechanical transmission components. General-purpose motion controllers typically provide motion planning methods based on constraints on quantities such as impact, acceleration, and velocity that can affect the accuracy of the dynamic trajectory; users can directly call the corresponding functions.

Motion planning that limits acceleration produces a trapezoidal velocity curve; motion planning that limits impact produces an S-shaped velocity curve. Generally speaking, for CNC machine tools, motion planning methods that limit acceleration and velocity reference quantities already achieve excellent dynamic characteristics. For rapid positioning systems with high acceleration and short stroke motion, there are strict requirements for positioning time and overshoot, often requiring motion planning methods with continuous high-order derivatives.

2. Multi-axis interpolation and continuous interpolation functions

Multi-axis interpolation functionality provided by general-purpose motion controllers is widely used in the CNC machining industry. In recent years, the rapid development of the engraving market, especially the mold engraving machine market, has driven the development of continuous interpolation functionality in motion controllers. Mold engraving involves the machining of numerous short line segments, requiring minimal fluctuations in machining speed between segments and smooth transitions at speed change points. This necessitates motion controllers with speed look-ahead and continuous interpolation capabilities. Googol Technology has launched a continuous interpolation motion controller specifically designed for short line segment machining processes. This controller has achieved excellent applications in mold engraving, laser engraving, and planar cutting.