HEIDENHAIN TNC 320 (340 55x-04) ISO programming - Manual (Page 451)

HEIDENHAIN TNC 320 451
Tool radius compensation on circular
arc or helix with angular length = 0 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 equidistant line of the arc/helix is
used for generating the tool path.
Checking the algebraic sign of the
depth parameter in fixed cycles Must be deactivated if Cycle 209 is
used No restrictions
Tool change while tool radius
compensation is active Program cancellation with error
message Tool radius compensation is canceled,
tool change is performed
Function TNC 320 iTNC 530