Siemens SINUMERIK 840D sl Function Manual page 905

The new language command TOROT ensures consistent programming with active
orientational toolholders for each kinematics type.
TOFRAME or TOROT defines frames whose Z direction points in the tool direction. This
definition is suitable for milling, where G17 is usually active. However, particularly with
turning or, more generally, when G18 or G19 is active, it is desirable that frames, which will
be aligned on the X or Y axis, can be defined. As a result of this, the G codes below are
newly introduced into G code group 53:
TOFRAMEX
TOFRMAEY
TOFRAMEZ
TOROTX
TOROTY
TOROTZ
These G codes enable corresponding frames to be defined. The functions of TOFRAME and
TOFRAMEZ or of TOROT and TOROTZ are identical to one another.
With software version P6 and higher, there is the option to write frames produced by TOROT
or TOFRAME into their own system frame ($P_TOOLFR).
For this, bit 3 must be set in machine data
MD28082 $MC_MM_SYSTEM_FRAME_MASK
.
The programmable frame is then retained unchanged.
When programming TOROT or TOFRAME, etc., response is identical, with or without a system
frame. Differences occur when the programmable frame is processed further elsewhere.
In new systems, it is recommended that only the intended system frame is used for frames
produced by G codes in group 53.
Example:
TRANS is programmed after TOROT. TRANS without specified parameters deletes the
programmable frame. In the variant without a system frame, this also deletes the frame
component of the programmable frame produced by TOROT, but if the TOROT component is
in the system frame, it is retained.
TOROT or TOFRAME, etc., are disabled with language command TOROTOF. TOROTOF deletes
the entire system frame $P_TOOLFR. If the programmable frame (old variant) and not the
system frame is described by commands TOFRAME, etc., TOROT only deletes the rotation
component and leaves the remaining frame components unchanged.
If a rotating frame is already active before language command TOFRAME or TOROT is
activated, a request is often made that the newly defined frame should deviate as little as
possible from the old frame. This is the case, for example, if a frame definition needs to be
modified slightly because the tool orientation cannot be set freely on account of Hirthtoothed
rotary axes. The language commands uniquely define the Z direction of the new frame.
In previous software versions, machine data
MD21110 $MC_X_AXIS_IN_OLD_X_Z_PLANE
can be used to choose between two variants for the position of the X-axis and Y-axis.
However, in both cases there is no reference to the previously active frame.
Basic logic functions: Axes, coordinate systems, frames (K2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed description
2.4 Frames
121