Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

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W1: Tool offset
18.8 Incrementally programmed compensation values
Basic Functions
1540
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Figure 18-48 Definition of the position for absolute programming of a motion in tool direction
The reference to this auxiliary plane serves only to calculate the end position. Active frames are not affected by
this internal calculation.
Instead of
MOVT= ...
it is also possible to write
MOVT=IC( ...)
if it is to be plainly visible that
MOVT
is to
function incrementally. There is no functional difference between the two forms.
Supplementary conditions
The following supplementary conditions apply to programming with
MOVT
:
• It is independent of the existence of a toolholder with orientation capability. The direction of the motion is
dependent on the active plane. It runs in the direction of the vertical axes, i.e., with
G17
in Z direction, with
G18
in Y direction and with
G19
in X direction. This applies both where no toolholder with orientation capability
is active and for the case of a toolholder with orientation capability without rotary tool or with a rotary tool in its
basic setting.
•
MOVT
acts similarly for active orientation transformation (3­4­5­axis transformation).
• If in a block with
MOVT
the tool orientation is changed simultaneously (e.g., active 5­axis transformation by
means of simultaneous interpolation of the rotary axes), the orientation at the start of the block is decisive for
the direction of movement of
MOVT
. The path of the tool tip (TCP - Tool Center Point) is not affected by the
change in orientation.
• Linear or spline interpolation (
G0
,
G1
,
ASPLINE
,
BSPLINE
,
CSPLINE
) must be active. Otherwise, an alarm is
produced. If a spline interpolation is active, the resultant path is generally not a straight line, since the end
point determined by
MOVT
is treated as if it had been programmed explicitly with X, Y, Z.
• A block with
MOVT
must not contain any programming of geometry axes (alarm 14157).
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