Siemens SINUMERIK 840Di Function Manual page 1838

Examples
4.1 Toolholder with orientation capability
N280 defines a rotation in accordance with the rotation of the table of the toolholder with
orientation capability. The new X direction thus points in the direction of the bisecting line in
the 4th quadrant, the new Z axis in the direction of the bisecting line in the 1st quadrant.
The zero point is approached in N290, i.e., the machine position X10.607 Y0 Z-4.393, since
the position of the zero point is not changed by the rotation.
N300 traverses in Y to the position Y33.000, since G18 is active and the Y component is not
affected by the active frame. The X and Z positions remain unchanged.
The position X17.678 Y0 Z1.536 is approached in N310.
N320 changes only the Z position to the value -8.464 as a result of the MOVT command. As
only the table can be rotated, the tool orientation remains unchanged parallel to the machine
Z direction, even if the Z direction of the active frame is rotated by 45 degrees.
N330 deletes the basic or system frame; thus the frame definition from N280 is undone.
In N340, TCOFR specifies that the toolholder with orientation capability is to be aligned
according to the active frame. Since a rotation is no longer active in N330 due to the
PAROTOF command, the initial state is applied. The frame offset becomes zero.
N350 thus approaches the position X10 X10 Z0 (= Z-13 + tool length). Note: Through the
simultaneous programming of both rotary axes A and B the actual position of the toolholder
with orientation capability is made to match that used in N340. The position approached by
the three linear axes is dependent on this position, however.
In N360, solid angles are used to define a plane whose intersecting lines in the X-Z and in
the Y-Z plane each form an angle of +45 degrees or -45 degrees with the X or Y axis. Thus,
the plane defined in this way is positioned so that the surface normal points in the direction
of the solid diagonals.
N370 traverses to the position X20 Y0 Z0 in the new coordinate system. Since the tool is
deselected with D0 at the same time, there is no longer an additional offset in Z. Since the
new X axis lies in the old XZ plane, this block reaches the machine position
X14.142 Y0 Z-14.142.
N380 only traverses on the Y axis in the rotated coordinate system. This leads to a motion of
all three machine axes. The machine position is X5.977 Y16.330 Z-22.307.
N390 approaches a point on the new Z axis. Relative to the machine axes this is thus on the
solid diagonal. All three axes thus reach the position 11.547.
4-4
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Tool Compensation (W1)