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Even when the point for the destination and the center of the circle are identical, circular interpolation is carried out as shown below
according to the direction of interpolation.
G02
G03
Y
(7000, 17000)
Counter
Clockwise
clockwise
rotation
rotation
G17G02X7000Y17000I12000J5000
(12000, 5000)
G17G03X7000Y17000I12000J5000
X
(0, 0)
Two circles with identical radii and passing through two points exist. This means that if the interpolation direction, radius of the circle,
and point for the destination of interpolation have been specified, there are two circles. These circles can be differentiated by specifying
a positive value for the radius if the center angle is 180 degrees or less, and a negative radius if the center angle exceeds 180 degrees.
Y
G17G02X17000Y-7000R-13000
A(0, 0)
X
G17G02X17000Y-7000R13000
B(17000, -7000)
G02 and G03 are also effective outside the block until a word of the same group (G00, G01, G02, or G03) is encountered. G17, G18,
G19 also remain effective even outside the block until a word of the same group (G17, G18, or G19) is specified.
G02 and G03 do not include the function for starting the spindle motor. This means that if the spindle motor is not already turning, the
M03 word must be given beforehand to start it.
The specified tool movement is the path followed by the center of the tool. Please make calculations to have the tool pass through a
location that is offset by a distance equal to its radius, and then carry out the programming accordingly. An error is generated when an
attempt is made to execute a code for starting cutter compensation (G41 or G42) while in the circular interpolation mode.
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