Program Structure; Fundamentals; Machining Planes - Siemens SINUMERIK 840D sl Operating Manual

6.3

Program structure

G_code programs can always be freely programmed. The most important commands that
are included in the rule:
● Set a machining plane
● Call a tool (T and D)
● Call a work offset
● Technology values such as feedrate (F), feedrate type (G94, G95,....), speed and
● Positions and calls, technology functions (cycles)
● End of program
For G code programs, before calling cycles, a tool must be selected and the required
technology values F, S programmed.
A blank can be specified for simulation.
See also
Blank input (Page 205)
6.4

Fundamentals

6.4.1

Machining planes

A plane is defined by means of two coordinate axes. The third coordinate axis (tool axis) is
perpendicular to this plane and determines the infeed direction of the tool (e.g. for 2½-D
machining).
When programming, it is necessary to specify the working plane so that the control system
can calculate the tool offset values correctly. The plane is also relevant to certain types of
circular programming and polar coordinates.
Turning
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
direction of rotation of the spindle (S and M)
Creating a G code program
6.3 Program structure
201