For this purpose there is a central management of the NC programs in the DNC system. The generated and
optimized NC programs are transmitted to the corresponding computers through data links. In case the CNC
machine tool is not equipped with a special DNC port a DNC terminal controls the organization of the data
transmission between the CNC control and master computer.
Depending on the model of a DNC system the following additional functions can be available:
· central tool management and tool compensation data
· interface for tool presetting devices
· work part management
· set time value and definition of working sequences
· control of the material flow
· central storage of the current data bases
· central cooperation data and machine data acquisition (BDE, MDE) with graphical evaluation
· NC programming with postprocessor conversion
· graphical simulation with representation of the tool, clamping device and work part contour
Advantages of the DNC operation system
A DNC operation system has the following advantages compared with a solution with non-integrated CNC
machine tools:
· improved workshop organization
· immediate availability of programs and additional information
· minimal standstill times of the CNC machine through the continuous provision of NC programs,
tools and material
· reduced data entry errors
· operating data and machine data acquisition (BDE, MDE) enable the user to control and record at
any time the production data (machine operating times, out-of-service-times, down times, etc.),
maintenance information and information on reasons for out-of-service-times
Workshop
The different CNC control types are demonstrated on the CNC machine tools available.
If no CNC machine tools are available for point or line control these CNC control types can be simulated with
the help of the corresponding work parts.
Example:
· point control
milling machine: go to boreholes
· line control
milling machine: travel parallel to axis
lathe: travel parallel to axis
· 2D path control
milling machine: travel linear on two axis
milling machine: travel in a circle
lathe: machine a cone or rounding
· 2½ D path control
milling machine: travel on various planes
milling machine: travel in a circle on various planes
· 3 D path control
milling machine: travel linear on two axis
milling machine: travel on a circle in space
For this purpose there is a central management of the NC programs in the DNC system. The generated andoptimized NC programs are transmitted to the corresponding computers through data links. In case the CNCmachine tool is not equipped with a special DNC port a DNC terminal controls the organization of the datatransmission between the CNC control and master computer.Depending on the model of a DNC system the following additional functions can be available:· central tool management and tool compensation data· interface for tool presetting devices· work part management· set time value and definition of working sequences· control of the material flow· central storage of the current data bases· central cooperation data and machine data acquisition (BDE, MDE) with graphical evaluation· NC programming with postprocessor conversion· graphical simulation with representation of the tool, clamping device and work part contourAdvantages of the DNC operation systemA DNC operation system has the following advantages compared with a solution with non-integrated CNCmachine tools:· improved workshop organization· immediate availability of programs and additional information· minimal standstill times of the CNC machine through the continuous provision of NC programs,tools and material· reduced data entry errors· operating data and machine data acquisition (BDE, MDE) enable the user to control and record atany time the production data (machine operating times, out-of-service-times, down times, etc.),maintenance information and information on reasons for out-of-service-timesWorkshopThe different CNC control types are demonstrated on the CNC machine tools available.If no CNC machine tools are available for point or line control these CNC control types can be simulated withthe help of the corresponding work parts.Example:· point control milling machine: go to boreholes· line control milling machine: travel parallel to axis lathe: travel parallel to axis· 2D path control milling machine: travel linear on two axis milling machine: travel in a circle lathe: machine a cone or rounding· 2½ D path control milling machine: travel on various planes milling machine: travel in a circle on various planes· 3 D path control milling machine: travel linear on two axismilling machine: travel on a circle in space
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