HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 604)

Tables and overviews
19.5 Functions of the TNC 640 and the iTNC 530 compared
19
604
TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
Comparison: Differences in Program Run, traverse
movements
Caution: Check the traverse movements!
NC programs that were created on earlier TNC controls may lead to different traverse movements or
error messages on a TNC 640!
Be sure to take the necessary care and caution when running-in programs!
Please find a list of known differences below. The list does not pretend to be complete!
Function TNC 640 iTNC 530
Handwheel-superimposed
traverse with M118
Effective in the active coordinate
system (which may also be
rotated or tilted), or in the
machine-based coordinate
system, depending on the setting
in the 3-D ROT menu for manual
operation
Effective in the machine-based
coordinate system
Approach/Departure with
APPR/DEP, R0 is active, contour
element plane is not equal to
working plane
If possible, the blocks are
executed in the defined
contour
element plane , error message
for APPRLN, DEPLN, APPRCT,
DEPCT
If possible, the blocks are
executed in the defined
working
plane ; error message for
APPRLN, APPRLT, APPRCT,
APPRLCT
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/
departure movements are
calculated for the first or 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 TNC does not issue an error
message, but uses the last valid
contour element to calculate the
departure movement