Operating and Programming — Milling Page 42 808D
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Program
Part 2
s
Basic Theory
DAM parameter
①DAM≠0, the first drilling operation（FDPR）cannot exceed the drilling depth. As of
the second drilling operation, the drilling is acquired from the last depth operation
(drilling depth=last drilling depth-DAM). The calculated drilling must be >DAM. If the
calculated drilling is ≤DAM, as of the next feed, the DAM value will be the feed depth
until the end of the feed. If the last remaining depth is <DAM, then drilling is per-
formed automatically until the required depth is reached.
②DAM=0,drilling depth each time is same as the 1st drilling depth (FDPR),
In case the residual depth <2xFDPR,the last 2 cutting depth are half of the residual
depth.
For descriptions of RTP, RFP, SDIS and DP, please see page 40
FDEP=5 Reach first drilling hole depth. Z axis
coordinate is -5
(absolute coordinate value)
FDPR=5 From the reference plane, drill down-
wards 5mm
DAM=90 Decrement is 90
DTB=0.7 Pause 0.7 s during final tapping of
thread depth (discontinuous cutting)
DTB <0: Unit is r
DTS=0.5 Stops at the start position for 0.5 s
(for VARI=1,removal active)
DTS <0: Unit is r
FRF=1
(range:0.001~1)
Original effective feed rate remains
unchanged
Feed rate modulus
VARI=0 Interruption in drilling is active VARI=1 retraction of active quill back
to reference plane
AXN=3
AXN is tool axis,under appointed
G17 use Z axis
The value of AXN decides which axis
to use
MDEP=5 Minimal drilling depth 5 mm This parameter activates only when
DAM <0
VRT=1.4 Interruption in drilling, the retraction
value of the quill is 1.4 mm
VRT=0 → retraction value is 1mm
VRT>0 → retraction value is appoint-
ed value
DTD=0.6 Pauses at the position of final drilling
depth for 0.6 s
DTD <0:unit is r, DTD =0:same as
DTB
DIS1=1.6 When reinserting a quill, you can
program a distance limit of 1.6 mm
For specific explanations please refer
to the standard handbook
Example：40 mm deep hole as an example, with DAM=2 mm and DAM=0 mm feed
Feed
times
Every feed depth/
mm
DAM=2
Actual depth/
mm
Feed
times
Every feed depth/
mm
DAM=0
Actual depth/
mm
1. FDPR=10 -10 1. FDPR=10 -10
2. FDPR-DAM=10-2=8 -18 2. FDPR=10 -20
3. (FDPR-DAM)-DAM
=8-2=6
-24 3. FDPR=10 -30
4. (FDPR-2DAM)-
DAM =6-2=4
-28
5. (FDPR-3DAM)-
DAM =4-2=2
-30 4. 5 -35
6. DAM=2 -32 5. 5 -40
7. DAM=2 -34 6.
8. DAM=2 -36 7.
9. DAM=2 -38 8.
10. DAM=2 -40 9.
Remaining depth =10 < 2xFDPR,the
remaining depth distribute by the last two
drilling
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