Operator's Manual

Table Of Contents
Thefollowingexampleillustratestheprocessgivenaninstallationusingthemaximumentrypitchofthe
machine(26%)onlevelground:
g218954
Figure44
1.26%pitch4.185cm(73inches)7.14.7m(45ft)
2.76cm(30inches)5.203cm(80inches)
3.142cm(56inches)6.208cm(82inches)
Youinserttherst3m(10ft)ofdrillbit/pipeinto
thegroundwithnosteering.Theendofthedrillbit
is76cm(30inches)deep(Figure44).
Youbeginsteeringupforthenext3m(10ft),
pushingthepipesinatthemaximumpitchchange
of8%.Thisresultsinachangeofpitchfrom26%
atthebeginningofthe3m(10ft)to18%atthe
endofthe3m(10ft)foranaveragepitchof22%.
Giventhat,thedrillheadlowersanother66cm(26
inches)andisnow142cm(56inches)deep.
Continuingsteeringupforthenext3m(10ft)at
an8%pitchchange,yourpitchchangesfrom18%
to10%foranaveragepitchof14%.Giventhat,
thedrillheadlowersanother43cm(17inches)
andisnow185cm(73inches)deep.
Continuingsteeringupforthenext3m(10ft)at
an8%pitchchange,yourpitchchangesfrom10%
to2%foranaveragepitchof6%.Giventhat,the
drillheadlowersanother18cm(7inches)andis
now203cm(80inches)deep.
Levelingthedrillheadfrom2%to0%takesless
than1.5m(5ft)moreforanaldepthof208cm
(82inches).Reachingthisnalpointtook4and
ahalf,3m(10ft)pipes.Soforthisexampleyour
entrypointshouldbe14.7m(45ft)backfromthe
beginning-at-depthpointofyourinstallation.
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