Q.Whyismeasuringofbalancingspeedofthecomponentvery
importantinabalancingmachine ?
A.Balancingmachineisanindustrialmachine.Themachineis
locatedinafactoryenvironmentalongtheprocessline. Manytypes
ofindustrialnoiseselectrical, mécanique, magneticwillexistinan
industrialenvironment. Besidesthisbalancingmachinehasdrive
elementslikemotors, poulies, beltswhichalsorotatealongwiththe
composant "". Thecomponentismountedonrollers, androllersalso
rotatealongwiththecomponent. Thetransducerswillpickup
signalsfromallrotatingelements. Theelectronicsofthebalancing
machineneedsareferencesignaltoextracttheunbalancesignalof
thecomponentbeingbalanced. Thespeedsignalofthecomponent
beingbalancedprovidesthereferenceforsignalextraction.
Inolderstroboscopemachines, itcanbeobservedthatthe
unbalancelocationwillstartshifting/oscillatingoverawideangle
whenbalancingisdone. Inmodernmachineswithphaselockloop,
theshiftofangleisreducedtoinsignificantlevels.
Q.Whydoweneedmultispeedbalancingmachines ?
A.Multispeedbalancingmachinesarenormallybigsizemachines
andmachineswhichhandlearangeofjobs. Incasethecomponent
isamassproducedcomponentwithpredictablelevelsof
balourd, singlespeedmachinescanbetunedtobalancethe
componentsfasterandwellwithinthetolerance. Butinheavy
composants, thelevelofunbalancemaynotbeknowninitially. Il
maybehazardousfromthepointofsafetytodirectlyrunthe
componentattherequiredbalancingspeed. Oui, heavycomponents
arerunatlowerspeeds, initialbalancingisdone. Furtherbalancing
isdoneathigherspeedstillthedesiredlevelofaccuracyis
Atteint.
Q.DoweneedtoputDynamicBalancingMachinesonafoundation ?
A.Balancingmachineisanindustrialmachineusedtomeasure
Vibrationandcomputetheresidualunbalance.ModernHardBearing
BalancingMachinesareforcemeasuring.ItisessentialthattheMachine
donotvibrateorshakeforcorrectmeasurementofunbalanceamountand
phaseAngle.
Formorepreciseresultsitisrequiredtomountthemachinesfirmlyonanindustrialfloor.
Q.Whatisunbalancereductionratio ?
A.Balancingmachineinstrumentationindicatesthelevelofunbalanceon
thecomponentbeingbalanced. Agoodmachinecanindicateavalueand
whenacorrectionequivalenttothevalueshownisexecutedthenextresultantresidual
unbalanceshouldbebelow90 - 95 % ofthefirstindicatedvalue.
Parexemple, onthefirstrun, ifthemachinehasshownsay50gramatagivenlocation.
Whena50gramweightisaddedatthatlocationandaresidualunbalancereadingtaken,
incasethemachineindicatesavalueof5gramandbelow, thenitissaidthatthemachine
ishavinganunbalancereductionratioofabout90 %.
FormoredetailsrefertotheISOstandards1940, 2953etc.
Q.Whatisplaneseparation,crosseffect,influence ?
A.Intwoplanedynamicbalancingmachines,theresultsareindicatedintwo
correctionplanes. Whenacorrectionismadeononeplane, theeffectofthe
unbalancecompensationonthesecondplane, isdefinedasplaneseparation
orcrosseffectorinfluence. Normalement, theplaneseparationwillbewellbelow3 %.
Incomputerbasedhardbearingdynamicbalancingmachines, theplane
separationisachievedmathematically. Souserstendtogetbetter
levelsofplaneseparationoncomputerizedhardbearingdynamic
balancingmachinesandthatisnotthecasewithsoftbearing
machineswhereinunbalancesignalsareelectronicallymixedand
modulatedforindicatingtheresults.
