HEIDENHAIN TNC 640, User Manual, Page: 266 / 948

Tools | Tool compensation
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
6.3 Tool compensation
Introduction
The control adjusts the tool path by the compensation value
for the tool length in the spindle axis. In the machining plane, it
compensates the tool radius.
If you are writing the part program directly on the control, the tool
radius compensation is effective only in the working plane.
The control accounts for the compensation value in up to six axes
including the rotary axes.
Tool length compensation
Length compensation becomes effective automatically as soon as
a tool is called. To cancel length compensation, call a tool with the
length L=0 (e.g.
TOOL CALL 0
).
NOTICE
Danger of collision!
The control uses the defined tool lengths for tool length
compensation. Incorrect tool lengths will result in an incorrect
tool length compensation. The control does not perform a length
compensation and a collision check for tools with a length of
0
and after
TOOL CALL 0
. Danger of collision during subsequent
tool positioning movements!
Always define the actual tool length of a tool (not just the
difference)
Use
TOOL CALL 0
only to empty the spindle
For tool length compensation, the control takes the delta values
from both the
TOOL CALL
block and the tool table into account:
Compensation value =
L
+
DL
TOOL CALL
+
DL
TAB
with
L
: Tool length
L
from
TOOL DEF
block or tool table
DL
TOOL CALL
: Oversize for length
DL
in the
TOOL CALL
block
DL
TAB
: Oversize for length
DL
in the tool table