HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 119)

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6.3 Cont
our Appr
oac
h
and Depar
tur
e
6.3 Contour Approach and
Departure
Overview: Types of paths for contour approach
and departure
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"4›a¦"›F=˜§a›^˜›^F˜ — ˜cF©˜ p¤˜4"m˜›^Fm˜’FdF4›˜›^F˜=F’aF=˜
z"›^˜O¤m4›apm˜§a›^˜›^F˜4pF’zpm=amV˜’pO›˜cF©9
Approaching and departing a helix
^F˜›ppd˜"zzp"4^F’˜"m=˜=Fz"›’˜"˜^Fda¨˜pm˜a›’˜F¨›Fm’apm˜*©˜hp¦amV˜am˜
"˜4a4¤d"˜"4˜›^"›˜4pmmF4›’˜›"mVFm›a"dd©˜›p˜›^F˜4pm›p¤˜ p¤˜zpV"h˜
^Fda¨˜"zzp"4^˜"m=˜=Fz"›¤F˜§a›^˜›^F˜ ˜ ˜"m=˜ ˜ ˜O¤m4›apm’˜
Important positions for approach and departure
„ ›"›amV˜zpam›˜
p¤˜zpV"h˜›^a’˜zp’a›apm˜am˜›^F˜*dp4c˜*FOpF˜›^F˜ ˜*dp4c˜ ˜daF’˜
p¤›’a=F˜›^F˜4pm›p¤˜"m=˜a’˜"zzp"4^F=˜§a›^p¤›˜"=a¤’˜4phzFm’"›apm˜
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„ ¤¨ada"©˜zpam›˜
phF˜pO˜›^F˜z"›^’˜Op˜"zzp"4^˜"m=˜=Fz"›¤F˜Vp˜›^p¤V^˜"m˜
"¤¨ada"©˜zpam›˜ ˜›^"›˜›^F˜ ˜4"d4¤d"›F’˜Oph˜©p¤˜amz¤›˜am˜›^F˜
˜p˜ ˜*dp4c˜^F˜ ˜hp¦F’˜Oph˜›^F˜4¤Fm›˜zp’a›apm˜›p˜›^F˜
"¤¨ada"©˜zpam›˜ ˜"›˜›^F˜OFF=˜"›F˜d"’›˜zpV"hhF=
„ a’›˜4pm›p¤˜zpam›˜ ˜"m=˜d"’›˜4pm›p¤˜zpam›˜
p¤˜zpV"h˜›^F˜Oa’›˜4pm›p¤˜zpam›˜ ˜am˜›^F˜ ˜*dp4c˜^F˜d"’›˜
4pm›p¤˜zpam›˜ ˜4"m˜*F˜zpV"hhF=˜§a›^˜"m©˜z"›^˜O¤m4›apm˜O˜›^F˜
˜*dp4c˜"d’p˜4pm›"am’˜"˜!˜"¨a’˜4pp=am"›F:˜›^F˜ ˜§add˜Oa’›˜hp¦F˜
›^F˜›ppd˜›p˜ ˜am˜›^F˜§pcamV˜zd"mF:˜"m=˜›^Fm˜hp¦F˜a›˜›p˜›^F˜Fm›FF=˜
=Fz›^˜am˜›^F˜›ppd˜"¨a’
Function Approach Departure
›"aV^›˜damF˜§a›^˜›"mVFm›a"d˜4pmmF4›apm
›"aV^›˜damF˜zFzFm=a4¤d"˜›p˜"˜4pm›p¤˜
zpam›
a4¤d"˜"4˜§a›^˜›"mVFm›a"d˜4pmmF4›apm
a4¤d"˜"4˜§a›^˜›"mVFm›a"d˜4pmmF4›apm˜
›p˜›^F˜4pm›p¤˜ zzp"4^˜"m=˜=Fz"›¤F˜
›p˜"m˜"¤¨ada"©˜zpam›˜p¤›’a=F˜pO˜›^F˜
4pm›p¤˜pm˜"˜›"mVFm›a"dd©˜4pmmF4›amV˜
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