Polar Coordinate Interpolation; G12.1, G13.1 - Mitsubishi Electric M700V Series Programming Manual

6. Interpolation Functions

6.10 Polar Coordinate Interpolation; G12.1, G13.1

Function and purpose
This function converts the commands programmed with the orthogonal coordinate axis into linear
axis movement (tool movement) and rotation axis movement (workpiece rotation), and controls the
contour.
The plane that uses the linear axis as the plane's 1st orthogonal axis, and the intersecting
hypothetical axis as the plane's 2nd axis (hereafter "pole coordinate interpolation plane") is
selected. Pole coordinate interpolation is carried out on this plane. The workpiece coordinate
system zero point is used as the coordinate system zero point during pole coordinate interpolation.
This is effective for cutting a notch section on a linear section of the workpiece diameter, and for
cutting cam shafts, etc.
Command format
G12.1 ; Pole coordinate interpolation mode start
G13.1 ; Pole coordinate interpolation mode cancel
(1) The coordinates commanded in the interval from the start to cancellation of the pole
coordinate interpolation mode will be the pole coordinate interpolation.
G12.1 ;
:
:
:
G13.1 ;
Linear axis
Rotation axis
(hypothetical axis)
Pole coordinate interpolation mode start
(The coordinate commands in this interval will be the pole coordinate
interpolation)
Pole coordinate interpolation mode cancel
6.10 Polar Coordinate Interpolation; G12.1, G13.1
X axis
Polar coordinate interpolation plane (G17 plane)
(Pole coordinate interpolation will start)
(Pole coordinate interpolation is canceled)
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C axis
Z axis