Frames - Siemens SINUMERIK 840D sl Function Manual

K2: Axis Types, Coordinate Systems, Frames
10.1 Brief description
● Geometry axes always form a perpendicular Cartesian coordinate system
● Special axes form a coordinate system without any geometrical relation between the special
axes.
● The names of the geometry axes and special axes can be defined.
● The workpiece coordinate system can be translated, rotated, scaled or mirrored with
FRAMES (TRANS, ROT, SCALE, MIRROR).
Multiple translations, rotational movements, etc., are also possible.
Zero offset external
The zero offset external has the following properties:
● At a time defined in the PLC, a predefined additional zero offset between the basic and the
workpiece coordinate systems is activated.
● The magnitudes of the offsets can be set by the following for each of the axes involved:
– PLC
– Operator Panel
– Part program
● Activated offsets take effect at the instant the first motion block of the relevant axes is
processed after offset activation. The offsets are superimposed on the programmed path
(no interpolation).
The velocity, at which the zero offset external is applied, is as follows:
Programmed F value plus +1/2 JOG velocity
The zero offset external is traversed at the end of G0 blocks.
● The activated offsets are retained after RESET and end of program.
● After POWER ON, the last active offset is still stored in the control but must be reactivated
by the PLC.
10.1.3

Frames

A frame is a closed calculation rule (algorithm) that translates one Cartesian coordinate system
into another.
Frame components
A frame consists of the following components:
Frame components
Offset
664
Programmable with:
Coarse offset
TRANS
ATRANS (additive translation component)
CTRANS (work offset for multiple axes)
G58 (axial work offset)
Fine offset
CFINE
G59 (axial work offset)
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions