HEIDENHAIN TNC 640, User Manual, Page: 937 / 948

Tables and Overviews | Functions of the TNC 640 and the iTNC 530 compared
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
937
Comparison: Differences in Program Run, traverse
movements
NOTICE
Danger of collision!
NC programs that were created older controls can lead to
unexpected axis movements or error messages on current
control models. Danger of collision during machining!
Check the NC program or program section using the graphic
simulation
Carefully test the NC program or program section in the
Program run, single block
operating mode
Pay attention to the following known differences (the list
below might not be complete!)
Function TNC 640 iTNC 530
Handwheel-superimposed travers-
ing with
M118
Effective in the machine coordinate
system
If the Global Program Settings
option is active, M118 is in effect
in the coordinate system select-
ed most recently for handwheel
superimpositioning.
Effective in the machine coordinate
system
Deleting basic rotation with
M143 M143
deletes the entries in
columns
SPA
,
SPB
, and
SPC
in the
preset table; reactivating the corre-
sponding preset table row does
not activate the deleted basic
rotation
M143
does not delete the entry
in the
ROT
column in the preset
table; reactivating the correspond-
ing preset table row activates the
deleted basic rotation
Scaling approach/departure
movements (
APPR
/
DEP
/
RND
)
Axis-specific scaling factor is
allowed, radius is not scaled Error message
Approach/departure with
APPR
/
DEP
Error message if
R0
is
programmed for
APPR
/
DEP LN
or
APPR
/
DEP CT
Tool radius 0 and compensation
direction
RR
are assumed
Approach/departure with
APPR
/
DEP
if contour elements with length 0
are defined
Contour elements with length 0
are ignored. The approach/depar-
ture movements are calculated
for the first and last valid contour
element An error message is issued if a
contour element with length 0 is
programmed after the
APPR
block
(relative to the first contour point
programmed in the APPR block)
For a contour element with
length 0 before a
DEP
block, the
iTNC 530 does not issue an error
message, but uses the last valid
contour element to calculate the
departure movement