Specifications

PARAMETER 2
2-77
Classification
USER
Display title
POINT
Address Meaning Description
Return speed for very-deep-hole drilling
cycle/decremental very-deep-hole
machining cycle
Program type M
Conditions Immediate
D57
Unit
0.001 mm/rev
0.0001 inch/rev
Setting range 0 to 9999
Set the return speed for the very-deep-hole drilling cycle or the
decremental very-deep-hole machining cycle.
Feed rate reduction distance ratio at cutting
start of a very-deep-hole drilling cycle (blind
hole, through hole)
Program type M
Conditions After movement stop
D58
Unit %
Setting range 0 to 300
Set the feed rate reduction distance from the reference point at cutting
start of a very-deep-hole drilling cycle (blind hole, through hole) during the
point machining. Specify the ratio with respect to the drill diameter.
If the nominal diameter of the drill is D, the feed rate reduction distance L
at cutting start is calculated using the following calculation expression:
L = D ×
D58/100
The feed rate is reduced by the ratio specified in D54 (feed rate reduction
ratio at cutting start) by the distance L from the reference point (R).
L = D × Feed rate reduction distance ratio
Clearance
R
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