Siemens SINUMERIK 840D sl Function Manual page 777

SD42980 $SC_TOFRAME_MODE (frame definition for TOFRAME, TOROT and PAROT)
Value Meaning
1
2
3
A detailed description of all parameterization options can be found in:
References
Detailed Machine Data Description
Special features and extensions
The behavior for value = 1 and 2 is achieved when starting from an arbitrary position of the X
and Y axes, by rotating the coordinate system around the Z axis until the desired setting is
reached.
The behavior for value = 3 is achieved by executing a rotation whose value is the exact mean
of these two angles. However, this only applies for the case that the old and new Z direction
enclose an angle of less than 90 degrees.
With value = 1, both the old and new X axes form an angle of under 90 degrees, with value =
2 the same is true of the Y axis (the relevant axes point in "approximately" the same direction).
If the two Z directions form an angle of more than 90 degrees, however, the conditions of an
angle < 90 degrees between the old and new axes can no longer be met simultaneously for
both X and Y. In this case, priority is given to the X direction, i.e. a mean value is taken from
the direction for 1 and the negative direction for 2.
If one of the commands TOFRAMEX, TOFRAMEY, TOROTX, TOROTY is programmed in place
of TOFRAME(Z) or TOROT(Z), the descriptions for adapting the axis directions perpendicular
to the main direction are also valid for the cyclically exchanged axes. The assignments in the
table below are then valid:
Tool direction
(vertical axis)
Secondary axis
(horizontal axis)
Secondary axis
(ordinate)
Example
N90
N100 ROT Z45
N110 TCARR=1 TCOABS T1 D1
N120 TOROT
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
The new X direction is chosen to lie in the X-Z plane of the old coordinate system. In this
setting, the angle difference between the old and new Y axis will be minimal.
The new Y direction is chosen to lie in the Y-Z plane of the old coordinate system. In this setting
the angle difference between the old and new X axis will be minimal.
The value chosen is the mean value of the two settings, which would have been chosen with
1 and 2.
TOFRAME, TOFRAMEZ
TOROT, TOROTZ
$SC_TOFRAME_MODE=1
K2: Axis Types, Coordinate Systems, Frames
TOFRAMEY
TOROTY
Z
X
Y
TOFRAMEX
TOROTX
Y
Z
X
10.5 Frames
X
Y
Z
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