Siemens SINUMERIK 840D Programming Manual page 73

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03.96
11.02
• In the first step, the depth parameterized with the
first drilling depth FDEP or FDPR is traversed as
long as it does not exceed the total drilling depth.
• From the second drilling depth on, the drilling stroke
is obtained by subtracting the amount of degression
from the stroke of the last drilling depth, provided
that the latter is greater than the programmed
amount of degression.
• The next drilling strokes correspond to the amount of
degression, as long as the remaining depth is
greater than twice the amount of degression.
• The last two drilling strokes are divided equally and
traversed and are therefore always greater than half
of the amount of degression.
• If the value for the first drilling depth is opposed to
the total depth, error message 61107 "First drilling
depth incorrectly defined" is generated and the cycle
not executed.
Example:
Programming the values REP=0, SDIS=0, DP=-40, FDEP=-12 and DAM=3
results in the following drilling strokes:
-12
-21
-27
-30, -35, -36
-38, -40
DAM<0 (-0.001 to -1) degression factor
The current depth is derived in the cycle as follows:
• In the first step, the depth parameterized with the
first drilling depth FDED or FDPR is traversed as
long as it does not exceed the total drilling depth.
• The next drilling strokes are calculated from the last
drilling stroke multiplied by the degression factor for
as long as the stroke remains larger or equal to the
minimum drilling depth.
• The last two drilling strokes are divided equally and
traversed and are therefore always greater than half
of the minimum drilling depth.
• If the value for the first drilling depth is opposed to the
total depth, error message 61107 "First drilling depth
incorrectly defined" is generated and the cycle not
executed.
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
corresponds to the first drilling depth
the incremental difference 9 comes from the first drilling depth
12 reduced by the amount of degression 3
previous drilling depth reduced and amount of degression 3
amount of degression
remaining depth divided into two cuts.
Drilling Cycles and Drilling Patterns
2.1 Drilling cycles
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