OPTIMUM
M A S C H I N E N - G E R M A N Y
808D
Page 334
Operating and Programming — Milling
Create Part Program Part 2
Brief instruction 808D Milling
Basic Theory
DAM parameter
①
DAM
≠
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 performed automatically until
the required depth is reached.
②
DAM=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
FDEP=5
Reach first drilling hole depth. Z axis
coordinate is -5 (absolute coordinate
value)
FDPR=5
From the reference plane, drill
downwards 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
appointed 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
Remaining depth =10 <
2xFDPR, the remaining depth
distribute by the last two drilling
5.
(FDPR-3DAM)-DAM
=4-2=2
-30
5.
5
-35
6.
DAM=2
-32
6.
5
-40
7.
DAM=2
-34
7.
8.
DAM=2
-36
8.
9.
DAM=2
-38
9.
10.
DAM=2
-40
10.