CNC Milling | G05.1 | Smooth Interpolation (Quick Guide)

In this article, we describe how to use G05.1 code for Smooth Interpolation in CNC milling machines with all details and examples.

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Overview

Either of two types of machining can be selected, depending on the program command.

  • For those portions where the accuracy of the figure is critical, such as at corners, machining  is performed exactly as specified by the program command.
  • For those portions having a large radius of curvature where a smooth figure must be created, points along the machining path are interpolated with a smooth curve, calculated from the polygonal lines specified with the program command (smooth interpolation).

In this manner, high-speed, high-precision machining can be performed.
For this function, the AI contour control option is required for Fanuc CNC controller.

G05.1 Code Format

G05.1 Q2 Xp0 Yp0 Zp0 ; Smooth interpolation mode on
……..
G05.1 Q0 ; Smooth interpolation mode off

Parameters

Xp : X axis or an axis parallel to the X-axis
Yp : Y axis or an axis parallel to the X-axis
Zp : Z axis or an axis parallel to the X-axis

G05.1 Code Examples

Simple with Details

O0010

G05.1 Q2 X0 Y0 Z0;

G05.1 Q0;

M30;

If the following functions are required before smooth interpolation, specify G05.1.

  • AI contour control
  • Machining condition selecting function

Example with above functions

O0010

G05.1 Q1 R1; AI contour control, Machining condition selecting function
G05.1 Q2 X0 Y0 Z0; Smooth interpolation mode on

G05.1 Q0; Smooth interpolation mode off, AI contour control mode off

M30;

Smooth Interpolation

G91 ;
N13 X-1000 Z- 50 ;
G05. 1 Q2 X0 Y0 Z0 ;
N01 G01 X1000 Z-300 ;
N02 X1000 Z-200 ;
N03 X1000 Z-50 ;
N04 X1000 Z50 ;
N05 X1000 Z50 ; .
N06 X1000 Z-25 ; .
N07 X1000 Z-175 ;
N08 X1000 Z-350 ;
N09 Y1000 ;
N10 X-1000 Z350 ;
N11 X-1000 Z175 ;
N12 X-1000 Z25 ;
N13 X-1000 Z- 50 ;
N14 X-1000 Z- 50 ;
N15 X-1000 Z50 ;
N16 X-1000 Z200 ;
N17 X-1000 Z300 ;
G05. 1 Q0 ;


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