Siemens SINUMERIK 840D Programming Manual page 61
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03.96
04.00
2
• If the value for the first drilling depth is
incompatible with the total depth, the error
message 61107 "First drilling depth incorrectly
defined" is output and the cycle is not executed.
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 is traversed as long as it does not
exceed the total drilling depth.
• From the second drilling depth on, the drilling stroke is
obtained from the stroke of the last drilling depth
minus the last drilling depth multiplied by the
degression factor, provided that the drilling stroke is
greater than the minimum drilling depth (MDEP).
• 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 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.
FDPR (final drilling depth_1)
The parameter FDPR has the same effect in the cycle as
parameter DPR. If the values for the reference and
retraction plane are identical, the first drilling depth can
be defined as a relative value.
DTB (dwell time)
The dwell time at final drilling depth (chip breaking) is
programmed in DTB in seconds or revolutions of the
main spindle.
½ 0 in seconds
< 0 in revolutions
DTS (dwell time)
½ The dwell time at the starting point is only
performed if VARI=1 (swarf removal).
Value > 0 in seconds
Value < 0 in revolutions
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
Drilling Cycles and Drilling Patterns
2.1 Drilling cycles
2
2-61
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