Siemens SINUMERIK 840D sl Operating Manual page 461

Slot side compensation
Cylinder surface transformation is available in the following versions:
● Slot side compensation off
● Slot side compensation on (path milling only)
Slot side compensation off
When slot side compensation is deactivated, any type of slot with parallel sides can be
machined if the tool diameter is equal to the slot width.
The slot sides are not parallel if the slot width is larger than the tool diameter.
The slot contour is programmed for machining purposes.
Slot side compensation on
When slot side compensation is on, slots with parallel sides are machined even if the slot
width is larger than the tool diameter.
The slot contour must not be programmed for machining purposes, but the imaginary center-
point path of a bolt guided in the slot; whereby the bolt must move along every side. The slot
width is determined by parameter D.
Note
Selecting slot side compensation
The slot side compensation selection depends on the transformation type.
Milling
Operating Manual, 09/2011, 6FC5398-7CP40-2BA0
Longitudinal slot with
parallel limit, slot side
compensation on
Programming technological functions (cycles)
8.7 Further cycles and functions ShopMill
461