HEIDENHAIN MANUALplus 4110 Pilot - Manual (Page 90)

90
Dr
illing cy
cles
Thread milling cycle G799
G799 mills a thread into an existing bore hole.
Position the tool in center of the bore hole before calling G799. The cycle
positions the tool within the bore hole at the “thread end point“. The tool
then approaches with the “approach radius R“, mills the thread in a 360°
revolution, advancing by the “thread pitch F“. The cycle then retracts the
tool and returns it to the start point.
Parameters
Z:
Thread starting point
K: Thread depth
R: Approach radius – default: (I – cutter diameter)/2
F: Thread pitch
I: Inside thread diameter
H: Cutting direction – default: 0
• H=0: Up-cut milling
• H=1: Down-cut milling
J: Thread direction – default: 0
• J=0: Right
• J=1: Left