Siemens sinumerik 840D sl Operating Manual page 364

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Table of Contents

Programming technology functions (cycles)

● Retraction

● Safety clearance

Please note that the milling cutter's cutting edge cannot be checked for the maximum radial

Machining type, rough finishing

If there is too much residual material on the slot walls, unwanted corners are removed to the

finishing dimension.

Machining type, finishing:

When finishing walls, the milling cutter travels along the slot walls, whereby just like for

roughing, it is again fed in the Z direction, increment by increment. During this process, the

milling cutter travels through the safety clearance beyond the beginning and end of the slot,

so that an even slot wall surface can be guaranteed across the entire length of the slot.

Machining type, edge finishing

Edge finishing is performed in the same way as finishing, except that the last infeed (finish

base) is omitted.

Machining type, finishing base:

When finishing the base, the milling cutter moves backwards and forwards once in the

finished slot.

Machining type, chamfering

Chamfering involves breaking the edge at the upper slot edge.

Retraction involves the milling cutter being retracted at a 45° angle if the wrap angle is

less than 180°.

Otherwise, retraction is perpendicular, as is the case with drilling.

Retraction is performed perpendicular to the wrapped surface.

Traverse through the safety clearance beyond the end of the

workpiece in order to avoid rounding-off the

slot walls at the ends.

Operating Manual, 07/2010, 6FC5398-8CP40-0BA0

Sinumerik 828d