GAPOSA M3A - Installation Instructions

7
EN
SAFETY BRAKE SELECTION
GAPOSAoffersaselectionof9safetybrakesforrollershutters,eachonewithadifferent
torque.Thesafetybrake,madeupofanti-oxidationmaterials,consistsofacentralbody
withaholeinwhichtherollingshuttershaftisinserted,andissupportedbyametal
base.Betweenthecentralbodyandthebaseyoufindrubberbearingswithadensityapt
tocompensateanyeccentricityofthesystem.
Inordertoselectthemostsuitablemodelforyouapplication,itisnecessarytoconsider
thefollowingcharacteristics:
•Nominaltorque[Nm]:isthereferencevaluetoselectthemostappropriatesafetybrake
accordingtotheweightoftheshutterandthediameterofthedriveshaft.Withinthis
valuemustfallthenominaltorqueofthemotorthatistobeinstalled.
•Lockingtorque:isthemaximumstresstowhichthesafetybrakeissubjectedwhenit
blockstherotationoftheshaft.
•Workingspeed:referstothemaximumnumberofrevolutionsatwhichthesafetybrake
worksasasimplesupportwithoutfunctioningasadescentstopper.Withinthisvalue
mustfallthenumberofrevolutionsoftheshuttershaft.
•Ifthesafetybrakeisinstalledwithachaintransmissionsystem,makesurethechain
isnotloose.Achainnotsufficientlytightcausessuddenaccelerationsandthesafety
brakemayaccidentallyblock.
ThenrefertoTab.A.
INSTALLATION INSTRUCTIONS
Thisoperationisnotparticularlydifficult,butinordertogetthebestperformancefrom
thesafetybrake,inaccordancewiththecriteriaindicatedbytheproducingcompany,
theinstallershouldtakeparticularcareofsomeimportantprescriptions:
1. Acheckofthesafetybrakeregularworking,whiletheshutterisrotating.Sinceitisnot
possibletosimulateabreakageinthetransmission,youcanmakesureofthegood
workingofthesafetybrakebylisteningtothelinkingcausedbytheadjustmentof
internalcomponentswhiletheshuttermovesupanddown.Ifthisisclearlyheardthe
safetybrakehaspassedtheworkingtest.