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Cha p te r
Ni ne

The drilling operation in this example is programmed as follows:
GOTO/P6
GODTLA/0.0, 0.0, –2.5
GODTLA/0.0, 0.0, 2.5
A path control is programmed with the following commands:
GOFWD (go forward)
GOLFT (go left)
GODWN (go down)
GOBACK (go back)
GORGT (go right)
GOUP (go up)
With these commands, it is possible, for example, to program the
movement of a cutting tool in accordance with the contour in the
example.
GOTO/S1,TO,SURFACE1,TO,S2 Go to start point P1
GOFWD/S1,PAST,S5 Go along line S1 to S5
GOFWD/S5,TANTO,K1 Go along line S5 to K1
GOFWD/K1,TANTO,K2 Go from K1 via S4 to K2
GOFWD/K2,PAST,S6 Go from K2 via S4 to S6
GOFWD/S2,PAST,S1 Go along line S2 to S1
9.6.5.3 Auxiliary Commands
Various switching functions are programmed using commands from
this group—for example:

MACHIN Specifies the tool
FEDRAT Determines the feed speed
COOLNT Connects coolant
CUTTER Diameter of the tool
PARTNO Part number of the workpiece
FINI Program end

Other application-oriented programming languages for NC pro-
gramming are EXAPT, ADAPT, and AUTOSPOT. These languages are
constructed like APT, and in part build on that language. An NC pro-
gram written in application-oriented language must, of course, also be
translated into machine code and produced in punched tape (Fig. 9.25).

9.6.6 Computer Numerical Control System
The program for a specific machining task of an NC machine is located
on a punched tape. This punched tape must be read separately for