Siemens SINUMERIK 840D Programming Manual page 281

4
03.96
Description of parameters
SPD and SPL (starting point)
You define the starting point of the groove from
where the cycle calculates the shape with these
coordinates. The cycle itself determines the starting
point to be approached at the beginning. In the case
of an external groove, the longitudinal axis direction
is first traversed and in the case of an internal
groove, the facing axis direction is first traversed.
Grooves on curved surfaces can be created in a
variety of ways. Depending on the shape and radius
of the curve, either a paraxial straight line can be
placed on the maximum of the curve or a tangential
oblique line can be placed on one of the edge points
of the groove.
Radii and chamfers on the groove edge of a curved
surface should only be programmed if the edge point
in question is positioned on the straight line defined
for the cycle.
WIDG and DIAG (groove width and groove depth)
The shape of the groove is defined with the
parameters groove width (WIDG) and groove depth
(DIAG). The cycle always starts its calculation from
the point programmed with SPD and SPL.
If the groove is wider than the active tool, the groove
is machined in several steps. The total width is
divided into equal sections in the cycle. The
maximum infeed is 95 percent of the tool width after
subtracting the tool nose radii. This ensures a cut
overlap.
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
4.3 Grooving cycle – CYCLE93
X
SPL
IDEP
ANG2
WIDG
X
ANG2
ANG1
SPL
4
Turning Cycles
STA1
ANG1
Z
IDEP
DIAG
STA1
Z
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