Motion Control can range from a simple on/off switch to a user programmable sequence of controlled events. The complexity of the controller in question is completely dependant on the application itself. Factors such as number of axis to control, power demands, feedback information available and type of motion required will all be deterministic in the configuration of the motion controller.
Industrial motion control can be divided into four categories according to their type of control:-
Sequencing refers to the control of numerous operations occurring in a particular order. This can be movements of a machine or a simpler and more common sequence of on/off or move/stop events. Sequencing of this nature can be achieved via electric, electromechanical or even pneumatic controllers, the later being the most uncommon. Basic timers or counters can be used here, but when the sequence contains more than a few simple steps the complexity of the controls increases.
- Speed Control
Speed Control is suited to applications where components run at different speeds or torques, be it via electronic or mechanical means.
Point-to-point controllers apply to situations where something requires movement from one place to another at a constant speed.
Incremental Controllers are similar to point-to-point controllers for they are also used to move objects but these controllers also allow positional feedback adjustments to reduce error.
Physically controllers can be divided into four basic types as follows:-
Chip-level devices consisting of a few integrated circuits combined to produce signals.
Board-level devices composed of one or more circuit boards containing computer functions as well as input/output (I/O).
Box-level devices generally combine displays, keyboards, computing, and I/O functions into a single enclosure.
Dedicated controllers include programmable logic controllers (PLCs) and pneumatic sequencers.