HEIDENHAIN PT 880 - Manual (Page 65)

POSITIP 880 65
I – 6 Pr
ogr
amming POSITIP 880
Major and Minor Arcs - A Major arc has a sweep angle greater than
180 degrees. A Minor arc has a sweep angle less than 180 degrees.
See Fig. I.51 as a graphic example of the two types of angles.
Example: Enter data and mill an arc
From point X1: 6 mm
From point Y1: 3 mm
To point X2: 3 mm
To point Y2: 6 mm
Depth: Thru
Radius: 2.24, < 180°
Direction: CW
Tool offset: Center
1st step: Enter data for an arc
Operating mode: PROGRAMMING
Press the PROGRAMMING FEATURES soft key.
Press ARC soft key.
Beginn data entry
Enter the from point for X. Press ENT.
Enter the from point for Y. Press ENT.
Enter the to point for X. Press ENT.
Enter the to point for Y. Press ENT.
Enter the cut depth. Press ENT.
Fig. I.51
Major
Arc
Minor
Arc
FROM X1
FROM Y1
TO X2
TO Y2
CUT DEPTH