35
Exception
No crossover point on the tool path
Programmed
path
Programmed
path
Path traveled
by tool center
Amount
of offset
Amount
of offset
Arc 1
Arc 2
Arc 1
Arc 2
Center of arc 2
Center of arc 1
* In this case, a crossover point exists on
the tool-center path for arcs 1 and 2.
* When the amount of offset becomes larger,
the crossover point disappears from the
tool-center path for arcs 1 and 2.
Programmed
path
Path traveled by
center of tool
Amount of offset
a
Programmed
path
Path traveled by
center of tool
a
Amount of offset
Path traveled by
center of tool
Path traveled by
center of tool
Programmed path
a
a
From a line to a line
From a line to an arc
Amount of offset
From an arc to a line
From an arc to an arc
Programmed path
Amount of offset
Amount of offset
Amount of offset
Amount of
offset
Amount of
offset
Outer-side Acute Angle
(a < 90°)
A case such as the following is an exception. In the figure at left, a crossover point exists on the path traveled by the tool center, and the
tool path is created normally. When the amount of offset becomes larger, however, no crossover point exists on the tool-center path, as
shown in the figure at right, and an error occurs.
