HEIDENHAIN TNC 320 User Manual page 533

Functions of the TNC 320 and the iTNC 530 compared 16.5
Function
Circle programming with polar
coordinates
Tool radius compensation on
circular arc or helix with angular
length = 0
Compensation of tool length in
the position display
Traverse movement in spacial arc
SLII Cycles 20 to 24:
Number of definable contour
elements
Define the working plane
Position at end of SL cycle
TNC 320 | User's Manual HEIDENHAIN Conversational Programming | 5/2013
TNC 320
The incremental rotation angle
IPA and the direction of rotation
DR must have the same sign.
Otherwise, an error message will
be issued
The transition between the
adjacent elements of the arc/helix
is generated. Also, the tool axis
motion is executed right before
this transition. If the element is
the first or last element to be
corrected, the next or previous
element is dealt with in the same
way as the first or last element to
be corrected
The values L and DL from the
tool table and the value DL from
the TOOL CALL are taken into
account in the position display
Error message is issued
Max. 16384 blocks in up to 12
subcontours
Tool axis in TOOL CALL block
defines the working plane
End position = clearance height
above the last position that is
defined before the cycle call
iTNC 530
The algebraic sign of the direction
of rotation is used if the sign
defined for DR differs from the
one defined for IPA
The equidistant line of the arc/
helix is used for generating the
tool path
The values L and DL from the tool
table are taken into account in the
position display
No restrictions
Max. 8192 contour elements
in up to 12 subcontours, no
restrictions for subcontour
The axes of the first positioning
block in the first subcontour
define the working plane
With MP7420, you can define
whether the end position is
above the last programmed
position, or whether the tool
moves only to clearance height
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