Comparison: Differences In Program Run, Traverse Movements - HEIDENHAIN TNC 640 User Manual

Tables and Overviews | Functions of the TNC 640 and the iTNC 530 compared
Comparison: Differences in Program Run, traverse
movements
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
Handwheel-superimposed travers-
ing with M118
Deleting basic rotation with M143
Scaling approach/departure
movements (APPR/DEP/RND)
Approach/departure with APPR/DEP
Approach/departure with APPR/DEP
if contour elements with length 0
are defined
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
NOTICE
TNC 640
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.
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
Axis-specific scaling factor is
allowed, radius is not scaled
Error message if R0 is
programmed for APPR/DEP LN or
APPR/DEP CT
Contour elements with length 0
are ignored. The approach/depar-
ture movements are calculated
for the first and last valid contour
element
iTNC 530
Effective in the machine coordinate
system
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
Error message
Tool radius 0 and compensation
direction RR are assumed
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
21
885