HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 124)

124 –˜pV"hhamV9˜pV"hhamV˜ pm›p¤’
6.3 Cont
our Appr
oac
h
and Depar
tur
e
Departure on a circular path with tangential
connection: DEP CT
^F˜›ppd˜hp¦F’˜pm˜"˜4a4¤d"˜"4˜Oph˜›^F˜d"’›˜4pm›p¤˜zpam›˜ ˜›p˜›^F˜
Fm=˜zpam›˜ ˜^F˜"4˜a’˜›"mVFm›a"dd©˜4pmmF4›F=˜›p˜›^F˜d"’›˜4pm›p¤˜
FdFhFm›
8 pV"h˜›^F˜d"’›˜4pm›p¤˜FdFhFm›˜§a›^˜›^F˜Fm=˜zpam›˜ ˜"m=˜"=a¤’˜
4phzFm’"›apm
8 ma›a"›F˜›^F˜=a"dpV˜§a›^˜›^F˜ — ˜cF©˜"m=˜ ˜ ˜’pO›˜cF©9
8 Fm›F˜"mVdF˜ ˜pO˜›^F˜"4
8 "=a¤’˜˜pO˜›^F˜4a4¤d"˜"4
„ O˜›^F˜›ppd˜’^p¤d=˜=Fz"›˜›^F˜§pczaF4F˜am˜›^F˜
=aF4›apm˜pO˜›^F˜"=a¤’˜4phzFm’"›apm˜|aF˜›p˜›^F˜
aV^›˜§a›^˜˜p˜›p˜›^F˜dFO›˜§a›^˜}9˜ m›F˜˜"’˜"˜
zp’a›a¦F˜¦"d¤F
„ O˜›^F˜›ppd˜’^p¤d=˜=Fz"›˜›^F˜§pczaF4F˜am˜›^F˜
=aF4›apm˜opposite˜›p˜›^F˜"=a¤’˜4phzFm’"›apm9˜
m›F˜˜"’˜"˜mFV"›a¦F˜¦"d¤F
Example NC blocks
Departing on a circular arc tangentially
connecting the contour and a straight line:
DEP LCT
^F˜›ppd˜hp¦F’˜pm˜"˜4a4¤d"˜"4˜Oph˜›^F˜d"’›˜4pm›p¤˜zpam›˜ ˜›p˜"m˜
"¤¨ada"©˜zpam›˜ ˜›˜›^Fm˜hp¦F’˜pm˜"˜’›"aV^›˜damF˜›p˜›^F˜Fm=˜zpam›˜ ˜
^F˜"4˜a’˜›"mVFm›a"dd©˜4pmmF4›F=˜*p›^˜›p˜›^F˜d"’›˜4pm›p¤˜FdFhFm›˜"m=˜
›p˜›^F˜damF˜Oph˜ ˜›p˜ ˜m4F˜›^F’F˜damF’˜"F˜cmp§m:˜›^F˜"=a¤’˜˜
›^Fm˜’¤OOa4F’˜›p˜4phzdF›Fd©˜=FOamF˜›^F˜›ppd˜z"›^
8 pV"h˜›^F˜d"’›˜4pm›p¤˜FdFhFm›˜§a›^˜›^F˜Fm=˜zpam›˜ ˜"m=˜"=a¤’˜
4phzFm’"›apm
8 ma›a"›F˜›^F˜=a"dpV˜§a›^˜›^F˜ — ˜cF©˜"m=˜ ˜ ˜’pO›˜cF©9
8 m›F˜›^F˜4pp=am"›F’˜pO˜›^F˜Fm=˜zpam›˜ 
8 "=a¤’˜˜pO˜›^F˜4a4¤d"˜"4˜ m›F˜˜"’˜"˜zp’a›a¦F˜¦"d¤F
Example NC blocks
X
Y
20
P
N
R0
P
E
RR R
8
180°
RR
23 L Y+20 RR F100
"’›˜4pm›p¤˜FdFhFm›9˜ ˜§a›^˜"=a¤’˜4phzFm’"›apm
24 DEP CT CCA 180 R+8 F100 Fm›F˜"mVdFKsG¬@:˜
"4˜"=a¤’KG˜hh
25 L Z+100 FMAX M2 F›"4›˜am˜!:˜F›¤m˜›p˜*dp4c˜s:˜Fm=˜zpV"h
X
Y
20
P
N
R0
P
E
RR
RR
12
10
R8
P
H
R0
23 L Y+20 RR F100
"’›˜4pm›p¤˜FdFhFm›9˜ ˜§a›^˜"=a¤’˜4phzFm’"›apm
24 DEP LCT X+10 Y+12 R+8 F100 pp=am"›F’˜ :˜"4˜"=a¤’KG˜hh
25 L Z+100 FMAX M2
F›"4›˜am˜!:˜F›¤m˜›p˜*dp4c˜s:˜Fm=˜zpV"h