
6. INTERPOLATION FUNCTION
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Polar coordinate interpolation is a function that exercises contour control
in converting a command programmed in a Cartesian coordinate system
to the movement of a linear axis (movement of a tool) and the movement
of a rotary axis (rotation of a workpiece). This function is useful for
grinding a cam shaft.
G12.1 starts the polar coordinate interpolation mode and selects a polar
coordinate interpolation plane (Fig. 6.8). Polar coordinate
interpolation is performed on this plane.
Rotary axis (virtual axis)
(unit:mm or inch)
Linear axis
(unit:mm or inch)
Origin of the local coordinate system (G52 command)
(Or origin of the workpiece coordinate system when a G52
command is not specified)
Fig. 6.7 Polar coordinate interpolation plane
When the power is turned on or the system is reset, polar coordinate
interpolation is canceled (G13.1).
The linear and rotation axes for polar coordinate interpolation must be set
in parameters (No. 5460 and 5461) beforehand.
6.7
POLAR COORDINATE
INTERPOLATION
(T SERIES)
General
Explanations
D Polar coordinate
interpolation plane