TOMATECH AUTOMATION
1.2 CNC System and CNC Machine
CNC machine tool is an electro-mechanical integrated product, composed of Numerical
Control Systems of Machine Tools, machines, electric control components, hydraulic
components, pneumatic components, lubricant, cooling and other subsystems
(components), and CNC systems of machine tools are control cores of CNC machine
tools. CNC systems of machine tools are made up of computerized numerical
control(CNC), servo (stepper) motor drive devices, servo (or stepper) motor etc.
Operational principles of CNC machine tools: according to requirements of machining
technology, edit user programs and input them to CNC, then CNC outputs motion control
commands to the servo (stepper) motor drive devices, and last the servo (or stepper)
motor completes the cutting feed of machine tool by mechanical driving device; logic
control commands in user programs to control spindle start/stop, tool selections, cooling
ON/OFF, lubricant ON/OFF are output to electric control systems of machine tools from
CNC, and then the electric control systems control output components including buttons,
switches, indicators, relays, contactors and so on. Presently, the electric control systems
are employed with Programmable Logic Controller (PLC) with characteristics of compact,
convenience and high reliance. Thereof, the motion control systems and logic control
systems are the main of CNC machine tools.
TAC-100XT Turning Machine CNC system has simultaneously motion control and logic
control function to control two axes of CNC machine tool to move, and has nested PLC
function. Edit PLC programs (ladder diagram) according to requirements of input and
output control of machine tool and then download them toTAC-1002T Turning Machine
CNC system, which realizes the required electric control requirements of machine tool, is
convenient to electric design of machine tool and reduces cost of CNC machine tool.
Software used to controlTAC-1002T Turning Machine CNC system is divided into system
software (NC for short) and PLC software (PLC for short). NC system is used to control
the display, communication, edit, decoding, interpolation and acceleration/deceleration,
and PLC system for controlling explanations, executions, inputs and outputs of ladder
diagrams. Standard PLC programs are loaded (except for the special order)
whenTAC-1002T Turning Machine CNC System is delivered, concerned PLC control
functions in following functions and operations are described according to control logics of
standard PLC programs, marking with “Standard PLC functions” in . Refer to Operation
Manual of machine manufacturer about functions and operations of PLC control because
the machine manufacturer may modify or edit PLC programs again.
Ⅰ Programming
Fig. 1-1
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