GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual
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Programming & Operation
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6
Ⅰ
Programming
1.2 CNC System of Machine Tools and CNC Machine Tools
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, lubricating, 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 codes 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 codes 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.
The system has simultaneously motion control and logic control function to control two axes of
CNC machine tool to move, and has PLC function. Edit PLC programs (ladder diagram) according to
requirements of input and output control of machine tool and then download them to
GSK988TA/988TA1/988TB 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.
Softwares realizing CNC control function is divided into system software (NC for short) and PLC
software (PLC for short). NC system is used for controlling 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 when the 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 GSK988TA/988TA1/988TB Turning CNC
System User Manual. 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
Programming is a course of workpiece contours, machining technologies, technology
parameters and tool parameters being edit into part programs according to special CNC
programming G codes. CNC machining is a course of CNC controlling a machine tool to complete
machining of workpiece according requirements of part programs. Technical flow of CNC machining
is shown in Fig. 1-2.
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Страница 465: ...Appendix 1 Parameters 447 Appendix ...
Страница 479: ...Appendix 3 Interface Explanation 461 Appendix ...
Страница 527: ...Appendix 5 Installation Layout 509 Appendix ...