7. Feed Functions
7.12 Automatic Corner Override
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7.12 Automatic Corner Override
Function and purpose
With tool radius compensation, this function reduces the load during inside cutting of automatic
corner R, or during inside corner cutting, by automatically applying override to the feed rate.
Automatic corner override is valid until the tool radius compensation cancel (G40), exact stop check
mode (G61), high-accuracy control mode (G61.1), tapping mode (G63), or cutting mode (G64)
command is issued.
This function is always valid in the tool radius compensation (G41/G42).
Machining inside corners
When cutting an inside corner as in Fig. 1, the machining allowance amount increases and a
greater load is applied to the tool. To remedy this, override is applied automatically within the corner
set range, the feedrate is reduced, the increase in the load is reduced and cutting is performed
effectively.
However, this function is valid only when finished shapes are programmed.
workpiece
Machining allowance
Programmed path
(finished shape)
Workpiece surface shape
Tool center path
Tool
θ
: Max. angle at inside corner
Ci : Deceleration range (IN)
Machining
allowance
θ
Ci
S
(1)
(2)
(3)
Deceleration
Fig.1
range