Machine Residual Material; Edge/Base Finishing; Rough Drill - Siemens SINUMERIK 840D Programming Manual

Milling Cycles 03.96
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3.15 Pocket milling with islands - CYCLE73, CYCLE74, CYCLE75

Machine residual material

The cycle allows material to be removed with a smaller
milling tool. The traversing motions defined by the
residual material of the last milling operation and the
current tool radius are output in the generated program.
The residual material technology can be programmed
repeatedly with a succession of decreasing tool radii.
No check is made on completion of the cycle for any
further residual material in the pocket.

Edge/base finishing

Another function of the cycle is to finish the pocket base
or circumnavigate the pocket and individual islands in a
finish operation.

Rough drill

Depending on the milling tool used, it may be
necessary to drill before solid machining the
workpiece. The cycle automatically calculates the
rough drilling positions as a function of the solid
machining operation to be performed afterwards.
The drilling cycle called modally beforehand is
executed at each of these positions. Rough drilling
can be executed in a number of technological
machining operations (e.g. 1. centering, 2. drilling).
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition