15 Operation and Adjustment Manual
Therearemanyjobsthatyoucandowithyourtransit,whichmay
bepurchasedwitha190‐typemicrometerinastandardconfigura‐
tion.Youcanevaluateanumberofalignment‐relatedcharacteris‐
ticsofmachineryorotherstructures,suchasstraightness,plumb,
level,flatness,andothers.However,toperformcertainOptical
Toolingprocedures,otheraccessoriesarerequired.Wewillmen‐
tionsomeoftheseaccessoriesaswediscusstherelatedtopics.
Inthischapterwewilldiscussthefollowingtopics:
ThisdiscussionismeanttomakeyouawareofsomeoftheOptical
Toolingproceduresthatyoucanuseinalignmentandmeasure‐
mentwork.Thismanualisnotagoodsubstituteforourtraining
classes,inwhichweofferhands‐ontrainingoftheseandmany
otherOpticalToolingtechniques.
We’llexplainwhatthesetermsmean,andhowtoaccomplishthem
usingyourtransit.
In
manyalignmentjobs,itisnecessarytoputthelineofsightof
yourtransitdirectlyonalinecreatedbytwoknownreferencetar‐
gets.Forexample,inFigure3.1(showingaviewfromoverhead),
sometargetshavebeeninstalledinthefloor.Thesetargetsrepre‐
sentalinewhich
isparalleltothecenterlineofamachineonwhich
youneedtoaligncomponents.Inpreparationfordoingthisalign‐
mentjob,itcouldbenecessarytobringtheinstrumentinlinewith
thesetwofloormonuments.
NoteinFigure3.1,thetransitmustnotonlyberotatedso
thatitis
paralleltothelinedefinedbythetargets,butitmustalsobeshifted
sideways.“Buckingin”isarepetitiveprocessinwhichyouadjust
boththeinstrument’sangleaswellasitslateralpositionsothatthe
transitisplaceddirectlyinlinewithtwotargets.
Ortobemoreac‐
curate,sothatthetransit’sverticalspindleliesintheverticalplane
whichalsorunsthroughthecenterofthefloortargets.
Notethatangularadjustmentsareeasyenoughtomakeusingthe
horizontaltangentadjustmentscrewonthetransititself.However,
Chapter3‐MeasuringTechniques
“Buckingin”
Autoreflection
Autocollimation
Collimation
Collineation
Reticleprojection
Measuringwithmicrometers
“Buckingin”
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