Axis Data - Siemens SINUMERIK 804D sl Commissioning Manual

15.8

Axis data

Introduction
The term "axis" is often used either as a single term in conjunction with SINUMERIK 840D sl
or in compounded form, e.g. machine axis, channel axis, etc. To provide an overview of the
philosophy used as the basis, here is a brief explanation of this term.
Definition
Generally, 4 types of axes are distinguished:
1. Machine axes
2. Channel axes
3. Geometry axes
4. Special axes
Machine axes
Machine axes are the motion units existing on a machine, which can also be designated as
linear or rotary axes, depending on their usable movement.
Channel axes
The total of all machine, geometry and special axes assigned to a channel is designated as
channel axes.
In this context, the geometry and special axes constitute the program-technological part of
the machining process, i.e. they are used for programming in the parts program.
The machine axes constitute the physical part of the machining process, i.e. they carry out
the programmed traversing movements on the machine.
Geometry axes
The geometry axes constitute the rectangular Cartesian basic coordinate system of a
channel.
Generally, (Cartesian arrangement of the machine axes) direct imaging of the geometry axes
to the machine axes is possible. If the arrangement of the machine axes, however, is not
Cartesian at right angles, the imaging is performed using a kinematic transformation.
CNC Part 1 (NCK, PLC, drive)
Commissioning Manual, 11/2006, 6FC5397-2AP10-2BA0
Fundamentals
15.8 Axis data
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