Longitudinal Groove (Slot1) - Siemens SINUMERIK 840D sl Operating Manual

Programming technological functions (cycles)
8.2 Milling
8.2.7

Longitudinal groove (SLOT1)

Function
You can mill any longitudinal groove with the "longitudinal groove" milling function.
The following machining methods are available:
● Mill longitudinal groove from solid material.
● Pre-drill longitudinal groove in the center first if, for example, the milling cutter does not
Depending on the dimensions of the longitudinal groove in the workpiece drawing, you can
select a corresponding reference point for the longitudinal groove.
Approach/retraction
1. The tool moves at rapid traverse to the retraction plane and infeeds at safety clearance.
2. The tool is inserted into the material according to the chosen strategy.
3. The longitudinal slot is always machined with the chosen machining type from inside out.
4. The tool moves back to the safety clearance at rapid traverse.
Machining type
You can select the machining mode for milling the longitudinal slot as follows:
● Roughing
● Finishing
● Finishing of edge
● Chamfer
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cut in the center (e.g. for ShopMill, program the drilling, rectangular pocket and position
program blocks in succession).
During roughing, the individual planes of the slot are machined one after the other until
depth Z1 is reached.
During finishing, the edge is always machined first. The slot edge is approached on the
quadrant, which joins the corner radius. In the last infeed, the base is finished from the
center out.
Edge finishing is performed in the same way as finishing, except that the last infeed
(finish base) is omitted.
Chamfering involves edge breaking at the upper edge of the longitudinal slot.
Operating Manual, 09/2011, 6FC5398-7CP40-2BA0
Milling