Mitsubishi Electric MELDAS C6 Programming Manual page 120

12. Tool Offset Functions
Circular
Point of intersection
s
θ
Program path
Center of
circular
(3) When the arc end point is not on the arc
For spiral arc ..............................A spiral arc will be interpolated from the start to end point of
For normal arc command...........If the error after compensation is within parameter "#1084
(4) When the inner intersection point does not exist
In an instance such as that shown in the figure below, the intersection point of arcs A and B
may cease to exist due to the offset amount. In such cases, program error (P152) appears and
the tool stops at the end point of the previous block.
Linear (Obtuse angle)
Tool center
path
r
Center of
circular
the arc.
RadErr", the area from the arc start point to the end point is
interpolated as a spiral arc.
Hypothetical circle
Program path
r
Center of circular
Tool center path
r
Program path
Line intersecting
circulars A, B
12.3 Tool radius compensation
Circular
θ
Center of circular
s
Point of
intersection
r
Program path
Tool center path
r
R
Program error stop
Center of circular A
r
A
B
112
Linear (Acute angle)
Center of
Tool center
path
End point of
circular
s