CNC OPERATION CYCLE FULL DEFINATION DETAILS
1.FINISHING CYCLE
G70
P(nf)Q(ns)F(f)
P(nf)first
block sequence number
Q(ns)last
block sequence number
F(f)
finishing feed
2.TURNING CYCLE
G71 P(nf)Q(ns)U(∆u)w(∆w)F(f)
U(∆d) : depth of cut value
R(e) :
escaping amount
P(nf) : first
block sequence number
Q(ns) : last
block sequence number
U(∆u) : distance & direction finishing allowance x
axis/diameter
W(∆w) : distance & dimention in finishing allowance z axis /
length
F(f) : feed
value
3.FACING CYCLE
G72
W(∆d)R(e)
G72 P(nf)Q(ns)U(∆u)W(∆w)F(f)
W(∆d) : depth of cut
R(e) : escaping amount
P(nf) :first block sequence number
Q(ns) : last block sequence number
U(∆u)
: finishing allowance x axis
W(∆w) : finshing allowance z axis
F(f) : feed value
4.DRILLING CYCLE
G74
R(e)
G74 –Z(w)Q(∆d)F(f)
R(e) : escaping amount
-Z(w) : total drill depth
Q(∆d) : depth of each cut
(always micron value)
F(f) : feed value
5.THREADING CYCLE
G76
P(m)(r)(a) Q(∆dmin)R(d)
G76
X(u)-Z(w)P(k)R(i)Q(∆dmax)F(L)
P(m) : repetitive
count in finishing
(r) : thread corner chamfer amount
(a) : angle of tool tip(as per thread angle)
Q(∆dmin) : thread depth of cut in last
cut ( always micron value)
R(d) : finishing allowance (always 0.02 mm value )
X(u) : thread core diameter
-Z(w) : length of thread
P(k) : height of thread (always micron value
)
R(i) :
difference of thread radius if i -0
Q(∆max) : thread depth of cut in first cut (always micron value)
F(L) : lead
of thread or pitch of thread
Thread pitch value 25.4/tpi
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