Siemens SINUMERIK 828D Operating Manual page 493

Supplementary conditions for plunge cutting
● Roughing
1/2 slot width W - finishing allowance UXY ≤ milling cutter diameter
● Maximum radial infeed
The maximum infeed depends on the cutting edge width of the milling cutter.
● Increment
The lateral increment is calculated on the basis of the required slot width, milling cutter
diameter and finishing allowance.
● Retraction
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
Retraction is performed perpendicular to the wrapped surface.
● Safety clearance
Traverse through the safety clearance beyond the end of the workpiece to prevent
rounding of the slot walls at the ends.
Please note that the milling cutter's cutting edge cannot be checked for the maximum radial
infeed.
Machining type, rough finishing
If there is too much residual material on the slot walls, unwanted corners are removed to the
finishing dimension.
Turning
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
Programming technology functions (cycles)
9.4 Milling
493