HEIDENHAIN TNC 620 Programming Station

Special functions | Machining with polar kinematics
10
Activating FUNCTION POLARKIN
Use the POLARKIN AXES function to activate the polar kinematics.
The axis data define the radial axis, the infeed axis, and the polar
axis. The MODE data influence the positioning behavior, whereas the
POLE data define the machining at the pole. The pole is the center of
rotation of the rotary axis in this case.
Notes on the axes to be selected:
The first linear axis must be radial to the rotary axis.
The second linear axis defines the infeed axis and must be
parallel to the rotary axis.
The rotary axis defines the polar axis and is defined last.
Any available modulo axis that is installed onto the table side
so that it is opposite the selected linear axes can be used as the
rotary axis.
The two selected linear axes thus span an area within which the
rotary axis also lies.
MODE options:
Syntax Function
POS Seen from the center of rotation, the control
performs machining in the positive direction of the
radial axis.
The radial axis must be prepositioned correspond-
ingly.
NEG Seen from the center of rotation, the control
performs machining in the negative direction of the
radial axis.
The radial axis must be prepositioned correspond-
ingly.
KEEP The control remains with the radial axis on that
side of the center of rotation on which the axis is
positioned when the function is activated.
If the radial axis is on the center of rotation upon
switch-on, POS applies.
ANG The control remains with the radial axis on that
side of the center of rotation on which the axis is
positioned when the function is activated.
If you set POLE to ALLOWED, positioning through
the pole is possible. The pole side is changed and a
180-degree rotation of the rotary axis is prevented.
POLE options:
Syntax Function
ALLOWED The control permits machining operations at the
pole
SKIPPED The control prevents machining operations at the
pole
The disabled area corresponds to
a circular surface with a radius of
0.001 mm (1 μm) around the pole.
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HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022