HEIDENHAIN TNC 640, User Manual, Page: 630 / 948

Multiple-Axis Machining | FUNCTION TCPM (option 9)
13
630
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
REFPNT CENTER-CENTER
You can use the
REFPNT CENTER-CENTER
variant to machine parts
with a tool whose tip is used as a reference point when executing
NC programs generated in a CAD/CAM software where the paths
reference the center of the cutting edge radius instead of the tool
tip.
Previously, this functionality could only be achieved by shortening
the tool with
DL
. The variant with
REFPNT CENTER-CENTER
is
advantageous in that the control knows the true tool length and can
protect it with
DCM
.
If you use
REFPNT CENTER-CENTER
, to program pocket milling
cycles, the control generates an error message.
Example
...
13 FUNCTION TCPM F TCP AXIS SPAT PATHCTRL AXIS
REFPNT TIP-TIP
Both the tool reference point and the center of rotation are
located at the tool tip.
14 FUNCTION TCPM F TCP AXIS POS PATHCTRL AXIS
REFPNT CENTER-CENTER
Both the tool reference point and the center of rotation are
located at the center of the cutting-edge radius.
...
Resetting FUNCTION TCPM
Use
FUNCTION RESET TCPM
to explicitly cancel
the function within a program.
When you select a new NC program in the
Program
run, single block
or
Program run, full sequence
operating modes, the control automatically cancels the
TCPM
function.
Example
...
25 FUNCTION RESET TCPM
Reset FUNCTION TCPM
...