User Manual

13
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax [phone] • www.ametekapt.com
AUTOMATION & PROCESS
TECHNOLOGIES
950MD
Theseries950Mill-DutyHousing(950MD)was
designedforapplicationswheremountingastand-
alonerodstylelineardisplacementtransducer
(LDT)isprohibitive.Potentialphysicaldamage,
environmentalconditionsormountinglimitations
areallelementsthatareinvolvedinspecifyinga
linearpositionfeedbacksystemthatwillperform
awlesslyformanyyearstocome.The950MD
housinghasbeendesignedtoeliminateallofthe
aboveproblemsbyprotectingtheLDTfromphysical
andenvironmentaldamagesuchastemperature,
corrosives,shock&vibration,ordustanddebris.
Additionally,the950MDoffersasimpletwopoint
mountingschemethatcancompensateforlateral
and/orhorizontalmovementofthemachinewhilein
operation.Mountingboltsareprovidedforboththe
trunnionmountandrodendsineitherstandardsteel
oroptionalStainlessSteelwhenspecied.
The950MDhousingisalsoperfectforretrotting
existingcylinderswithanLDTprovidinga
continuouspositionfeedbacksignal.The950MD
allowsforaconvenientwaytomountthe950MD
andinternalLDTparalleltothecylinder.This
eliminatestheneedtoteardownandgundrill
thecylindertoaccommodateanLDTsimplyfor
providingpositionfeedbackthathadnotpreviously
beenavailable.
Thehousingmayalsobeofbenetinthissame
congurationwhenyouhaveanexistingcylinderin
operationthatdoesnotallowforaneasyremoval
oftheLDT.Oldmachinesandevensomeexisting
machinesornewlydesignedmachinesdidnottake
intoconsiderationtheneedforcontinuousposition
feedback.Certainmachinesmayrequirethatthe
entirecylinderberemovedinordertoreplacetheLDT.
Theactuatorcontainsa1/2”sphericalrodendwith
approximately1”ofadjustment(length).This
sphericalrodendallowsmechanicalmovementin
ahorizontaland/orverticalmotiontocompensate
foranymechanicalslopormisalignmentbetween
thehousingandmachine.Areartrunnionmount
isprovidedformountingeitherdirectlyinfrontof
theheadassemblyorontherearofthehead.An
optional3/4”sphericalrodendcanbesuppliedon
therearoftheunit(seedrawingfordetails).
Thebackcapissuppliedwiththreadedandplugged
holesthatallowforeldinstallationofthe3/4”
diametertrunnionmountbrackettothebackcap.
Thetrunnionmountbracketispositionedatthe
pointwheretheheadandbarrelconnect.Asimple
exchangeofhardwareisallthatisnecessaryto
movethetrunnionmountbrackettothebackcap
andplugthenolongerrequiredbracket
mounting
holes.Whenorderingthe3/4”rearrodendoption,
thetrunnionmountbracketisnotsuppliedsinceit
wouldnotberequired.
Theactuatorrodissupportedbytwobearingswithin
theguidetube.Thefrontpistonbearingcontainsa
wiperassemblytokeepcontaminantsfromentering
theguidetube.Therear,ormovable,bearing
assemblyismanufacturedfromRulon®.Thishigh-
temperaturepolymermaterialprovideslowwear
andsmoothoperation.
Thetransducermagnetismountedwithintherear
bearingassembly.Themagnetisa1”O.D.cylinder
magnet(SD0410300).Themagnetispositioned
2”fromtheendofthetransducerhexwhenthe
actuatorisfullyretractedand5”fromtheendof
thetransducerguidetubewhentheactuatorisfully
extended.
The950MDisdesignedtoincorporateanLDTwhich
hasaminimum2”NullZoneand5”DeadBand.
Series 950MD Mill-Duty Housing