Siemens SINUMERIK 840D Programming Manual page 138

3 3
Milling Cycles 12.97
3.5 Slots on a circle – SLOT1
Description of parameters
Y
CPA
See Section 2.1.2. (Drilling, Centering – CYCLE81)
INDA
for a description of parameters RTP, RFP, SDIS.
See Section 3.2 for cycle setting data _ZSD[1].
STA1
DP and DPR (slot depth)
The slot depth can be defined as either absolute (DP)
or relative (DPR) to the reference plane.
If it is entered as a relative value, the cycle
automatically calculates the correct depth on the
basis of the positions of the reference and retraction
planes.
X
NUM (number)
The number of slots is determined with the parameter
NUM.
LENG and WID (slot length and slot width)
The shape of a slot in the plane is determined with
parameters LENG and WID. The milling cutter diameter
must be smaller than the slot width. Otherwise alarm
61105 "Cutter radius too large" will be activated and the
cycle aborted.
The milling cutter diameter must not be smaller than
half of the slot width. This is not checked.
CPA, CPO and RAD (center point and radius)
The position of the circle of holes in the machining
plane is defined by the center point (parameters CPA
and CPO) and the radius (parameter RAD). Only
positive values may be entered for the radius.
STA1 and INDA (start angle and indexing angle)
The arrangement of the slot on the circle is defined
by these parameters.
STA1 defines the angle between the positive direction
of the abscissa of the workpiece coordinate system
active before the cycle was called and the first slot.
Parameter INDA contains the angle from one slot to the
next.
If INDA=0, the indexing angle is calculated from the
number of slots so that they are arranged equally
around the circle.
© Siemens AG, 2002. All rights reserved
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SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition