Q.Whyismeasuringofbalancingspeedofthecomponentvery
¿importantinabalancingmachine?
MA.Balancingmachineisanindustrialmachine.Themachineis
locatedinafactoryenvironmentalongtheprocessline. Manytypes
ofindustrialnoiseselectrical, mecánico, magneticwillexistinan
industrialenvironment. Besidesthisbalancingmachinehasdrive
elementslikemotors, poleas, beltswhichalsorotatealongwiththe
componente. Thecomponentismountedonrollers, androllersalso
rotatealongwiththecomponent. Thetransducerswillpickup
signalsfromallrotatingelements. Theelectronicsofthebalancing
machineneedsareferencesignaltoextracttheunbalancesignalof
thecomponentbeingbalanced. Thespeedsignalofthecomponent
beingbalancedprovidesthereferenceforsignalextraction.
Inolderstroboscopemachines, itcanbeobservedthatthe
unbalancelocationwillstartshifting yá oscillatingoverawideangle
whenbalancingisdone. Inmodernmachineswithphaselockloop,
theshiftofangleisreducedtoinsignificantlevels.
¿Q.Whydoweneedmultispeedbalancingmachines?
A.Multispeedbalancingmachinesarenormallybigsizemachines
andmachineswhichhandlearangeofjobs. Incasethecomponent
isamassproducedcomponentwithpredictablelevelsof
desequilibrio, singlespeedmachinescanbetunedtobalancethe
componentsfasterandwellwithinthetolerance. Butinheavy
componentes, thelevelofunbalancemaynotbeknowninitially. Ar
maybehazardousfromthepointofsafetytodirectlyrunthe
componentattherequiredbalancingspeed. Nja'bu̲, heavycomponents
arerunatlowerspeeds, initialbalancingisdone. Furtherbalancing
isdoneathigherspeedstillthedesiredlevelofaccuracyis
Alcanzado.
¿Q.DoweneedtoputDynamicBalancingMachinesonafoundation?
A.Balancingmachineisanindustrialmachineusedtomeasure
Vibrationandcomputetheresidualunbalance.ModernHardBearing
BalancingMachinesareforcemeasuring.ItisessentialthattheMachine
donotvibrateorshakeforcorrectmeasurementofunbalanceamountand
central.
Formorepreciseresultsitisrequiredtomountthemachinesfirmlyonanindustrialfloor.
¿Q.Whatisunbalancereductionratio?
A.Balancingmachineinstrumentationindicatesthelevelofunbalanceon
thecomponentbeingbalanced. Agoodmachinecanindicateavalueand
whenacorrectionequivalenttothevalueshownisexecutedthenextresultantresidual
ofthefirstindicatedvalue unbalanceshouldbebelow90 — 95%.
Porejemplo, onthefirstrun, ifthemachinehasshownsay50gramatagivenlocation.
Whena50gramweightisaddedatthatlocationandaresidualunbalancereadingtaken,
incasethemachineindicatesavalueof5gramandbelow, thenitissaidthatthemachine
ishavinganunbalancereductionratioofabout90%.
FormoredetailsrefertotheISOstandards1940, 2953etc.
¿Q.Whatisplaneseparation, crosseffect, influence?
A.Intwoplanedynamicbalancingmachines, theresultsareindicatedintwo
correctionplanes. Whenacorrectionismadeononeplane, theeffectofthe
unbalancecompensationonthesecondplane, isdefinedasplaneseparation
orcrosseffectorinfluence. Normalmente, theplaneseparationwillbewellbelow3%.
Incomputerbasedhardbearingdynamicbalancingmachines, theplane
separationisachievedmathematically. Souserstendtogetbetter
levelsofplaneseparationoncomputerizedhardbearingdynamic
balancingmachinesandthatisnotthecasewithsoftbearing
machineswhereinunbalancesignalsareelectronicallymixedand
modulatedforindicatingtheresults.
