HEIDENHAIN MANUALplus 4110 - Manual (Page 200)

200 4 Cycle Programming
4.7 Dr
illing Cy
cles
Deep-hole drilling
A hole is to be bored through the workpiece outside
the turning center with the cycle "Deep-hole drilling,
axial." This machining operation requires a traversable
spindle and driven tools.
The parameters “1st hole depth P” and “hole depth
reduction value IB” define the individual passes and
the “minimum hole depth JB” limits the hole
reduction value.
As the "return length B" is not defined, the drill
therefore retracts to the starting point after each pass,
remains there for the programmed dwell time, and
then advances again to the safety clearance for the
next pass.
Since this example is to illustrate how you drill a
through hole, the hole end point Z2 is programmed
such that the tool has to drill all the way through the
workpiece before it reaches the end point.
The parameters "AB" and "V" define a feed reduction
for both pre-drilling and through-boring.
Tool data
„ WO = 8—Tool orientation
„ I = 12—Drilling diameter
„ B = 118—Point angle
„ H = 1—The tool is a driven tool