840D/828D SINUMERIK Operate Page 5
B508
B508
Notes
Contour programming of a turned item
Preliminary note:
Since the entire production of the plug is not the subject of this document,
only the contour sequence without any threads and grooves will be dealt
with.
Contours of grooves, under-cuts etc are not integrated into the contour se-
quence of a subprogram; instead they are machined separately using cy-
cles.
The work piece zero point was selected as starting point. The maximum
diameter of the raw material is 80 mm.
Course work
Now write the complete subprogram “SUBR2” from the drawing extract
shown above.
The following hardcopy from the editor is intended to serve as an aid to
finding the correct solution.
Hint:
The chamfering of the work piece on diameter 70 mm with subsequent re-
traction of the tool in block N110 presents here a danger of collision with
the chuck jaws!
For this reason ensure already during the setting up for a collision free po-
sitioning of the of the tool in the Z-axis to at least -85 mm!
N10 G01 X0 Z0 ; Contour starting point
N20 X20 CHR=2.5 ; Chamfer for M20
N30 Z-22
N40 X32 RND=2 ; R2 on diameter 32
N50 Z-32 ; Starting point for R4
N60 G02 X40 Z-36 I4 K0 ; Circular interpolation R4
N70 G01 X43.963 RND=1 ; Medium of the tolerance Dm.40f7
N80 Z-62
N90 X60.787 Z-80 ; Cone
N100 X66 ; Starting point for chamfer
N110 X72 Z-83 ; Chamfer
N120 X82 ; Retraction above the raw material
N130 M17
Section 3
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