Stock Removal (Cycle952) - Siemens SINUMERIK 840D sl Operating Manual

Parameter
Subprogram
Labels in the
subprogram
8.5.7

Stock removal (CYCLE952)

Function
For stock removal, the cycle takes into account a blank that can comprise a cylinder, an
allowance on the finished-part contour or any unmachined-part contour. You must define an
unmachined-part contour as a separate closed contour in advance of the finished-part
contour.
Precondition
For a G-code program, at least one CYCLE62 is required before CYCLE952.
If CYCLE62 is only present once, then this involves the finished part contour.
If CYCLE62 is present twice, then the first call is the unmachined part contour and the
second call is the finished-part contour (also see Chapter "Programming (Page 406)").
Rounding the contour
In order to avoid residual corners during roughing, you can enable the "Always round the
contour" function. This will remove the protrusions that are always left at the end with each
cut (due to the cut geometry). The "Round to the previous intersection" setting accelerates
machining of the contour. However, any resulting residual corners will not be recognized or
machined. Thus, it is imperative that you check the behavior before machining using the
simulation.
When set to "automatic", rounding is always performed if the angle between the cutting edge
and the contour exceeds a certain value. The angle is set in a machine data element.
Alternating cutting depth
Instead of working with constant cutting depth D, you can use an alternating cutting depth to
vary the load on the tool edge, As a consequence you can increase the tool life.
The percentage for the alternating cutting depth is saved in a machine data element.
Milling
Operating Manual, 09/2011, 6FC5398-7CP40-2BA0
Description
PRG: Subprogram
PRG: Subprogram
•
LAB1: Label 1
•
LAB2: Label 2
•
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Programming technological functions (cycles)
8.5 Contour turning - only for G code programs
Unit
419