Specifications

2 PARAMETER
2-76
Classification
USER
Display title
POINT
Address Meaning Description
Deceleration rate at cutting start for very-
deep-hole drilling cycle/decremental very-
deep-hole machining cycle
Program type M
Conditions Immediate
D54
Unit %
Setting range 0 to 100
F’= F ×
D54
100
F : Specified feed rate
F' : Feed rate at cutting start
Feed rate at F' over distance
l
from the
programmed start point
D
End point
θ
Drill
Programmed
start point
l
NM211-00268
l
=
2 × tan
θ
/2
D
(0° <
θ
< 180°)
l
= 0 (
θ ≥
180°)
Drilling return distance for very-deep-hole
drilling cycle/decremental very-deep-hole
machining cycle
Program type M
Conditions Immediate
D55
Unit 0.001 mm/0.0001 inch
Setting range 0 to 9999
NM211-00252P
1
: Start point
P
2
: End point
D
n
(n = 1 to 4) = Cut depth
D
4
D
3
D
2
D
1
P
1
P
2
G1
G0
D55
D55
D55
Number of revolutions during dwell at chip
ejection position and hole bottom for very-
deep-hole drilling cycle/decremental very-
deep-hole machining cycle
Program type M
Conditions Immediate
D56
Unit Revoluitons
Setting range 0 to 255
Set the number of revolutions of the milling spindle during dwell time at the
chip ejection position and the hole bottem for the very-deep-hole drilling
cycle or the decremental very-deep-hole machining cycle.
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