Long Hole (Longhole) - Only For G Code Programs - Siemens SINUMERIK 828D Operating Manual

Programming technological functions (cycles)
8.2 Milling
Parameters Description
The positions refer to the reference point:
X0 Reference point X – (for single position only)
Y0 Reference point Y – (for single position only)
Z0 Reference point Z – (for single position only)
W Slot width
L Slot length
α0 Angle of rotation of slot
Z1 Slot depth (abs) or depth relative to Z0 (abs) – (only for ∇, ∇∇∇, ∇∇∇ base and ∇∇∇
rough finishing)
Maximum plane infeed
DXY •
Maximum plane infeed as a percentage of the milling cutter diameter
•
- (only for ∇)
DZ Maximum depth infeed - (only for ∇, ∇∇∇ rough finishing, ∇∇∇ and ∇∇∇ edge)
- (only for vortex milling)
UXY Plane finishing allowance (slot edge) - (only for ∇, ∇∇∇ rough finishing and ∇∇∇ base)
UZ Depth finishing allowance (slot base) - (only for ∇, ∇∇∇ rough finishing and ∇∇∇ edge )
FS Chamfer width for chamfering (inc) - (for chamfering only)
ZFS Insertion depth of tool tip (abs or inc) - (for chamfering only)
8.2.10

Long hole (LONGHOLE) - only for G code programs

Function
Use the "Elongated hole" cycle to machine elongated holes arranged on a circle. The
longitudinal axis of the elongated hole is aligned radially.
In contrast to the groove, the width of the elongated hole is determined by the tool diameter.
Internally in the cycle, an optimum traversing path of the tool is determined, ruling out
unnecessary idle passes. If several depth infeeds are required to machine an elongated
hole, the infeed is carried out alternately at the end points. The path to be traversed in the
plane along the longitudinal axis of the elongated hole changes its direction after each
infeed. The cycle searches for the shortest path when changing to the next elongated hole.
NOTICE
The cycle requires a milling cutter with a "face tooth cutting over center" (DIN 844).
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Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
Unit
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Degrees
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%
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HMI sl Milling