HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 506)

506
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
M118 in conjunction with M128 Function not available Function available
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
Effect of Q parameters Q60 to Q99 (or QS60 to QS99) are always
local
Q60 to Q99 (or QS60 to QS99) are local or
global, depending on MP7251 in
converted cycle programs (.cyc). Nested
calls may cause problems