Computer Numerical Control (CNC) is a specialized and versatile form of Soft
Automation and its applications cover many kinds, although it was initially
developed to control the motion and operation of machine tools.
Computer Numerical Control may be considered to be a means of operating a
machine through the use of discrete numerical values fed into the machine, where
the required 'input' technical information is stored on a kind of input media such
as floppy disk, hard disk, CD ROM, DVD, USB flash drive, or RAM card etc. The
machine follows a predetermined sequence of machining operations at the
predetermined speeds necessary to produce a workpiece of the right shape and
size and thus according to completely predictable results. A different product can
be produced through reprogramming and a low-quantity production run of
different products is justified.
1.1 Control Systems
1.1.1 Open Loop Systems
Open loop systems have no access to the real time data about the performance of
the system and therefore no immediate corrective action can be taken in case of
system disturbance. This system is normally applied only to the case where the
output is almost constant and predictable. Therefore, an open loop system is
unlikely to be used to control machine tools since the cutting force and loading of
a machine tool is never a constant. The only exception is the wirecut machine for
which some machine tool builders still prefer to use an open loop system because
there is virtually no cutting force in wirecut machining.
To down load all the materials. Click the below links...
CONTROL FOR CNC.pdf - Click Here
CNC PROGRAM.pdf - Click Here
Automation and its applications cover many kinds, although it was initially
developed to control the motion and operation of machine tools.
Computer Numerical Control may be considered to be a means of operating a
machine through the use of discrete numerical values fed into the machine, where
the required 'input' technical information is stored on a kind of input media such
as floppy disk, hard disk, CD ROM, DVD, USB flash drive, or RAM card etc. The
machine follows a predetermined sequence of machining operations at the
predetermined speeds necessary to produce a workpiece of the right shape and
size and thus according to completely predictable results. A different product can
be produced through reprogramming and a low-quantity production run of
different products is justified.
1.1 Control Systems
1.1.1 Open Loop Systems
Open loop systems have no access to the real time data about the performance of
the system and therefore no immediate corrective action can be taken in case of
system disturbance. This system is normally applied only to the case where the
output is almost constant and predictable. Therefore, an open loop system is
unlikely to be used to control machine tools since the cutting force and loading of
a machine tool is never a constant. The only exception is the wirecut machine for
which some machine tool builders still prefer to use an open loop system because
there is virtually no cutting force in wirecut machining.
To down load all the materials. Click the below links...
CONTROL FOR CNC.pdf - Click Here
CNC PROGRAM.pdf - Click Here