PROGRAMMING9. PRESSING FUNCTION
1 G68 is an one-shot G code.
2 The standard point of G68 is the center of arc.
3 Pitch specification
The pitch is specified by the arc length.
The pitch is defined as the divided length of the arc having radius r specified in address I. The
pitch does not mean the arc length between the centers of adjacent punch points, i.e., the
divided length of the arc having a radius of r + d/2 (d: tool diameter).
This reason is shown below.
The commanded arc faces are required as a finel product, irrespective of whether the tool moves
along outside of the arc (right upper part) or inside of the arc (right lower part).
Accordingly, it is desirable that the pitch along the specified arc is equal to the commanded pitch,
when taking the scallop into consideration.
These faces are required
as product profiles.