HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 431)

HEIDENHAIN TNC 640 431
13.2 Basis F
unctions (Sof
tw
ar
e Option 50)
Inclined turning
It may sometimes be necessary for you to bring the swivel axes into
a specific position to machine a specific process. This can be
necessary for example when you can only machine contour elements
according to a specific position due to tool geometry.
Inclining a swivel axis creates an offset from tool to tool. The function
M144
considers the position of the inclined axes and compensates this
offset. In addition the function M144 aligns the Z direction of the
workpiece coordinate system to the direction of the centerline of the
tool. If an inclined axis is a tilting table, so that the workpiece is
sloping, the TNC runs traverse movements in the displaced workpiece
coordinate system. If the inclined axis is a swivel head (tool is sloping)
the workpiece coordinate system is not displaced.
After inclining the swivel axis you may have to again pre-position the
tool in the Y coordinates and orient the position of the tool tip with the
cycle 800.
Alternatively to function M144 you can also use function M128. The
effect is identical, but the following limitation applies: The TNC can
also run tool tip radius compensation during inclined processing. If you
activate inclined processing with M128 then tool tip radius
compensation without a cycle, i.e. in traversing blocks with RL/RR, is
not possible. If you activate inclined processing with M144 this
limitation does not apply.
If the turning cycles are executed with M144, the angles of the tool to
the contour change. The TNC automatically takes these modifications
into account and thus also monitors the machining in inclined state.
X
Z
If you process in inclined state you cannot use recessing
cycles or thread cycles.
Tool compensation is always effective in the tool
coordinate system, even during inclined machining.