HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 42)

43
Cycles
for
Machining
Holes
and
Threads
UNIVERSAL DRILLING (203)
CYCL DEF: Select Cycle 203 UNIVERSAL DRILLING
Set-up clearance: Q200
Depth – Distance between workpiece surface and bottom
of hole: Q201
Feed rate for plunging: Q206
Pecking depth: Q202
Dwell time at top: Q210
Surface coordinate: Q203
2nd set-up clearance: Q204
Decrement after each pecking depth: Q212
Nr of breaks – Number of chip breaks before retraction: Q213
Min. pecking depth if a decrement has been entered: Q205
Dwell time at depth: Q211
Retraction feed rate: Q208
Retract dist. for chip breaking: Q256
The TNC automatically pre-positions the tool in the tool axis. If the
depth is greater than or equal to the pecking depth, the tool drills to
the depth in one plunge.