Orientation Compression - Siemens SINUMERIK 840D sl Function Manual

F2: Multi-axis transformations
1.9 Orientation
The following conditions must be met in order to monitor the axis limits of a rotary axis and
modify the calculated end positions:
• A generic 5-axis transformation of type 24, 40 or 56 must be active.
• The axis must be referenced.
• The axis must not be a modulo rotary axis.
• The following machine data may not be equal to zero:
MD21180 $MC_ROT_AX_SWL_CHECK_MODE (check software limits for orientation
axes)
The following machine data specifies the conditions under which the rotary axis positions may
be modified:
MD21180 $MC_ROT_AX_SWL_CHECK_MODE
Value 0: No modification permitted (default, equivalent to previous behavior).
Value 1: Modification is only permitted if axis interpolation is active (ORIAXES or ORIMKS).
Value 2: Modification is always permitted, even if vector interpolation (large circle
interpolation, conical interpolation, etc.) was active originally.
Switch-over to axis interpolation
If the axis positions have to be changed from the originally determined value, the system
switches to rotary axis interpolation because the original interpolation path, e.g. large circle
interpolation or conical interpolation, can no longer be maintained.
Example
An example is shown in Chapter "Example for Generic 5-axis Transformation" for modifying
the rotary axis motion of a 5-axis machine with a rotatable tool.
1.9.3

Orientation compression

Function
The compressor functions COMPON, COMPCURV and COMPCAD can also be used to
compress NC programs containing orientations programmed with the help of direction
vectors, to a definable tolerance.
Precondition
A precondition for the compression of orientations is the availability of the "Orientation
Transformation" option.
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Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions