9 Circular Interpolation
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Transcript 9 Circular Interpolation
Circular interpolation
CIRCULAR PROFILES
• Circular cutting motion
• Arc or Radius Cutting is known as Circular interpolation
• Milling machine operations involve circular motion
for determining tool movement in the clockwise
direction as well as the counterclockwise direction.
• Circular interpolation is carried out with
Go2 or G03 code
• Circular interpolation can be programed using
radius (R ) value or (I J K) value
Circular interpolation using Radius
• General format for G02 or G03
•
X Y R
•G02 X8.25 Y 4.25 R 1.5
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Go2 means that it will be clockwise circular cut
X value 8.25
Y value is 4.25
R value is 1.5 is the length of radius
Tool Motion
• Plane Selection:
• G17 XY plane
• G 18 XZ plane
• G19 YZ plane
PROGRAMING CIRCULAR MOVE
The general format is: G02 X8.25 Y 4.25 R 1.5
EXAMPLE
G17 G90
G2 X 2.125 Y 0.75 R5 F2
PROFILING AT CONSTANT FEED RATE
To maintain constant feed rate while profiling a contour:
Distance traveled at the center of the tool
Feed rate of the tool center:
linear motion
In circular motion
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EXAMPLE
G17 G91
G2 X 4.125 Y 2.125 R - 5 F2
PROGRAM
Heading of Program
Plane Selection
Tool Selection
The system in in proper motion mode(G90, G91)
The control in linear interpolation mode (G0 G1)
Feed rate and speed has been specified (F,S)
Circular Interpolation Direction ( G02 , G03)
Circular Interpolation