Siemens SINUMERIK 840D sl Function Manual page 189

● Geometry axes traverse in N10 but not in N20
● Geometry axes traverse in N20 but not in N10
● Activation of thread-cutting G33 in N20
● Change from BRISK and SOFT
● Transformation-relevant axes are not completely assigned to the path motion (e.g. for
oscillation axes, positioning axes).
The insertion of the rounding block would slow part program machining overproportionally
Possible causes:
● A program or program section consists of a number of very short traversal blocks (≈ 1
interpolator cycle / traversal block; because each traversal block requires at least one
interpolator cycle, the inserted intermediate block would almost double the machining time)
● G64 (path control operation without rounding) without speed reduction active for block
change
● The parameterized overload factor (MD32310 $MA_MAX_ACCEL_OVL_FACTOR) permits
the traversal of the programmed contour without the path speed needing to be reduced.
See also: MD20490 $MC_IGNORE_OVL_FACTOR_FOR_ADIS
Path parameters inhibit the rounding
Possible causes:
● G641 (path control operation with rounding in accordance with the path criterion) is active
but rapid traverse is active (G0) AND ADISPOS == 0 (rounding separation for G0)
● G641 (path control operation with rounding in accordance with the path criterion) is active
but rapid traverse is not active AND ADIS == 0 (rounding separation for path functions G1,
G2, G3, ...)
● G642 or G643 (path control operation with rounding while observing defined tolerances) is
active but all tolerances == zero
N10 or N20 does not contain traversing motion (zero block).
Normally no zero blocks are created. Exceptions:
● Active synchronous action
● Program jumps
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
B1: Continuous-path mode, Exact stop, Look Ahead
4.3 Continuous-path mode
189