Siemens SINUMERIK 840DE sl Function Manual page 309

A pole angle, which defines a tolerance circle about the pole, can be parameterized in the
system variables. If a programmed tool path passes by the pole within the tolerance circle, a
switchover is made from orientation interpolation to linear/rotary axis interpolation.
①
②
③
④
⑤
A
C
S
E
E'
α
Ω
Syntax
$NT_POLE_LIMIT[<n>] = <PoleTolAngle>
Meaning
$NT_POLE_LIMIT:
Transformations
Function Manual, 06/2019, A5E47435470B AA
Pole
Equatorial plane
Programmed path
Path traveled through the pole
End angle
Rotary axis about the X coordinate axis of the WCS
Rotary axis about the Z coordinate axis of the WCS
Starting point of the interpolation / traversing block
Approached end point
Programmed end point
End angle
Maximum permitted end angle ($NT_POLE_LIMIT)
Pole angle
Unit:
Data type:
Default value:
Value range:
K12 transformation definitions with kinematic chains
Degrees
REAL
2.0
- max. REAL value ≤ x ≤ + max. REAL value
4.2 Commissioning
309