Yuav ua li cas kuaj tau ib qho luv luv nyob rau hauv ib qho yooj yim Printed Heater Circuit Court ntawm Platen?
Tso lus
Lub tshuab cua sov Kapton hloov pauv tau txuas rau lub phaj nkhaus tuaj yeem ua haujlwm zoo rau lub sijhawm ntev thiab tom qab ntawd mam li taug kev hauv av- cuam tshuam cuam tshuam thaum ua haujlwm. Tom qab rov pib ua haujlwm tsis tu ncua yuav rov pib dua tab sis qhov txhaum yuav rov tshwm sim tom qab yam tsis muaj kev ceeb toom. Qhov kev ua hluav taws xob flickering no yog ib qho kev mob tshwm sim ntawm ib qho kev sib tshuam luv luv hloov pauv tau lub tshuab cua sov platen teeb meem feem ntau ua los ntawm microscopic puas nyob rau hauv cov ntawv luam tawm kab.
Cov hauv paus ntsiab lus feem ntau yog cov kab plaub hau tawg los yog ib nrab delamination ntawm cov txheej txheem tiv thaiv los yog cov txheej txheem uas qhib thiab kaw nyob ntawm qhov thermal expansion lossis me me mechanical flexing ntawm lub tshuab cua sov.
Intermittent heater fault nature
Cov tshuab luam ntawv yooj yim yog ua los ntawm cov hlau nyias lossis cov pa roj carbon raws li cov kab sib txuas ntawm cov txheej txheem polymer xws li Kapton. Cov kab no yog npaj los khaws cov hluav taws xob txuas ntxiv nrog kev khoov nruab nrab thiab kub caij tsheb kauj vab.
Txawm li cas los xij, muaj qee qhov deterioration mechanisms thaum lub sijhawm:
Microcracks nyob rau hauv luam tawm lem
Kev sib cais ntawm cov khaubncaws sab nraud povtseg
Termination ntsiab lus stress concentration
Kev qaug zog vim muaj ntau yam thermal expansion cycles
Localized mechanical dabtsi yog khoov nrog nqaim radii
Vim tias cov kev ua tsis tiav no tsis tas yuav tas mus li, lub voj voog yuav ua haujlwm ib txwm nyob rau hauv cov xwm txheej zoo li qub tab sis ua tsis tiav thaum raug cov neeg kho tshuab lossis thermal stress.
Qhov teeb meem tsuas yog tam sim no thaum flexing Circuit Court.
Pib Kev rho tawm hluav taws xob thiab kev npaj kev nyab xeeb
Ua ntej kuaj kev kuaj mob, lub rhaub hluav taws xob yuav tsum tau ua kom tag nrho de-energized thiab hluav taws xob txiav tawm ntawm txhua qhov hluav taws xob.
Cov kauj ruam npaj yog:
Xauv tawm & fais fab tuag
Cov cua kub sib txuas yog cais los ntawm kev tswj hluav taws xob
Qhov system kuaj xyuas ntawm chav tsev kub.
Cov kev hauv av ua pov thawj muaj kev nyab xeeb thiab ruaj khov
Tom qab ntawd qhov ntsuas hluav taws xob tsis tshua muaj hluav taws xob tau ua tiav siv lub ntsuas ntsuas ohmmeter lossis LCR ntsuas.
Kev ntsuas qhov ntsuas hluav taws xob ntawm cov cuab yeej ntsuas yuav tsum tau khaws cia kom tsawg txaus los tiv thaiv arcing hla cov kab nrib pleb me me lossis qhov khoob, txwv tsis pub tus cwj pwm sib cuam tshuam tuaj yeem zais.
Resistance Checking Thaum Lub Sij Hawm Zoo
Rau txhua cheeb tsam cua sov, tus nqi tsis ua haujlwm ntawm lub rhaub yog txiav txim siab.
Kev nyeem ruaj khov feem ntau qhia tias:
Conductive Tracks (Nco ntsoov)
Tsis qhib circuits mus ib txhis
tsis nyuaj luv rau hauv av xwm txheej
Txawm li cas los xij, cov teeb meem sib cuam tshuam tsis tuaj yeem rov ua dua nrog kev ntsuas zoo ib leeg thiab xav tau kev sim tshuab hluav taws xob kom ua raws li qhov tsis ua haujlwm.
Bending Test rau qhov tsis xws luag
Ib txoj hauv kev zoo tshaj plaws ntawm kev kuaj mob yog los qhia kev tswj cov tshuab flexing hauv qhov tseeb, nrog kev saib xyuas tas li ntawm kev tiv thaiv.
Txoj kev yog ua raws li nram no:
Lub rhaub hluav taws xob txuas nrog ohmmeter
kev ntsuas yog nkag los yog qhia tsis tu ncua
Platen los yog nkag tau cua sov ntug yog flexed maj mam
Yooj yim, ceev faj txav kom tsis txhob muaj kev puas tsuaj
Peb pom tus cwj pwm tsis kam rau thoob plaws hauv txoj kev no:
Sudden jumps rau infinite kuj (qhib lub xeev Circuit Court)
Sudden drops nyob rau hauv tsis kam (shorting ntawm kab)
Erratic swings (intermittent contact instability)
Txawm tias me ntsis mechanical deformation tuaj yeem qhib lossis kaw qhov tawg tawg, nthuav tawm qhov txhaum ntawm lub sijhawm.
Lub ntsuas LCR tuaj yeem muab qhov kev xav zoo dua los ntawm kev kuaj xyuas qhov hloov pauv me me uas yuav tsis pom ntawm ohmmeter li niaj zaus.
Visual tshuaj ntsuam nrog magnification
Kev soj ntsuam kom pom tseeb nrog rau kev kuaj hluav taws xob.
Siv lub teeb pom kev muaj zog thiab kev nthuav dav, cov cua sov saum npoo yog kuaj xyuas lub cev qhia txog kev puas tsuaj, tshwj xeeb tshaj yog nyob rau hauv qhov chaw muaj kev ntxhov siab.
Cov chaw soj ntsuam tseem ceeb yog:
Solder junctions thiab termination pads
Khoov thaj chaw ntawm kev hloov pauv hloov pauv
Sab ntawm cov cua sov sib dhos
Ntse platen radius cheeb tsam
Hloov cov ntsiab lus ntawm cov khoom nruj thiab hloov tau yooj yim
Cov tsos mob tshwm sim ntawm kev ua tsis tiav yog:
Fine fractures nyob rau hauv conductive lem
Me ntsis discoloration raws cov kab tawg
Localized lifting lossis bubbling ntawm laminate txheej.
Hloov maj mam variations nyob rau saum npoo
Kev sib tsoo feem ntau yog qhov zoo heev thiab tsuas yog tuaj yeem pom hauv qab lub teeb pom kev zoo.
Common Printed Heater Circuit Failure Qhov chaw
Intermittent faults nyob rau hauv qhov chaw ntawm mechanical los yog thermal stress concentration yog statistically ntau dua.
Cov ntsiab lus tsis ua haujlwm feem ntau suav nrog:
Cov kab khoov ncig nqaim radii
Fais fab nkag point connect pads
Qhov chaw nyob ib sab rau txuas cov clamps lossis fasteners
Cov cheeb tsam nrog rov tshwm sim platen expansion cycles
Cov chaw no muaj kev ntxhov siab ntau dua thaum lub caij sov. Qhov no ua rau nws muaj feem ntau tias microfractures tuaj yeem loj hlob dhau sijhawm.
Kho vs. Hloov
Thaum qhov chaw ntawm qhov teeb meem raug tsim, kho qhov kev txiav txim yog nyob ntawm qhov hnyav thiab kev nkag tau yooj yim.
Kho (Qee zaum)
Yog tias qhov tawg me me thiab ncav cuag:
Ib qho khoom siv txuas tuaj yeem siv tau ua cov khoom siv nyiaj epoxy.
Hluav taws xob txuas ntxiv tuaj yeem rov tsim kho dua ntawm qhov puas lawm.
Ib qho hluav taws xob rwb thaiv tsev thiab cov cuab yeej tiv thaiv thaj tsam ntawm Kapton daim kab xev tuaj yeem muab ntxiv
Feem ntau, txoj kev no tsuas yog siv tau rau me me, zoo -txhais tau qhov tsis xws luag.
Kev daws teeb meem ntev
Hloov lub rhaub yog suav tias yog qhov kev txhim khu kev qha ntev ntev rau cov xwm txheej luv luv vim tias:
Kev pheej hmoo ntawm kev loj hlob vim qaug zog
Secondary kab nrib pleb zais
Tsawg dua - lub sij hawm mechanical integrity
Yog tias kho tau tiav lawm, cov cheeb tsam ib puag ncig yuav raug kev ntxhov siab thiab tsis muaj zog los ntawm kev ntxhov siab.
Vim li cas thiaj nrhiav tau qhov txhaum tsis sib thooj
Qhov kev sib tw ntawm hluav taws xob tawg yog lawv qhov sib cuam tshuam thiab nyob ntawm:
Expansion vim kub
Mechanical dabtsi yog khoov
Kev ntxhov siab los ntawm lub sijhawm
Hu rau kev sib cais ntawm nano nplai
Ib lub voj voog tuaj yeem kuaj tau zoo hauv qhov kev xav zoo li qub, thiab tsis ua haujlwm tiag tiag.
Yog li ntawd, kev sib koom ua ke cov txheej txheem kuaj hluav taws xob thiab tshuab hluav taws xob yog qhov tseem ceeb rau kev sib cais qhov tseeb.
Nres Yav Tom Ntej Flexible Heater Failures
Txhua lub tshuab luam ntawv hloov tau yooj yim muaj lub neej ua haujlwm tsis muaj zog, txawm hais tias kev cia siab tuaj yeem txhim kho los ntawm:
Tsis txhob nruj khoov radii ntawm kev teeb tsa
Xyuas kom tsis tu ncua flatness ntawm platen nto
Mitigation ntawm qhov kawg ntawm thermal cycling
Tiv thaiv txhua yam kev ntxhov siab ntawm cov khoom siv cable
Kho lub davhlau ya nyob twg strain alleviation
Tsim cov yam ntxwv uas txo cov neeg kho tshuab kev nyuaj siab tam sim ntawd ua rau lub neej ua haujlwm.
Cov ntsiab lus
Nrhiav ib qho luv luv nyob rau hauv ib qho yooj yim luam tawm lub tshuab hluav taws xob xav tau kev ntsuas hluav taws xob, tswj cov tshuab flexing, thiab kev tshuaj xyuas qhov muag. Thaum lub sij hawm maj mam deformation, kev saib xyuas kev tiv thaiv feem ntau qhia txog qhov tsis sib haum xeeb zais tsis pom nyob rau hauv cov xwm txheej zoo li qub.
Cov xwm txheej luv luv ntawm cov tshuab luam ntawv hloov tau yooj yim yog feem ntau tshwm sim los ntawm micro- tawg lossis delamination ntawm cov kab hluav taws xob, feem ntau ntawm cov chaw muaj kev ntxhov siab xws li khoov thiab txiav.
Nrog rau kev mob siab rau kev soj ntsuam thiab kev tswj xyuas, qhov teeb meem feem ntau yuav raug txheeb xyuas raws nraim, tig qhov kev ua tsis tau zoo rau hauv qhov tsis txaus ntseeg pom meej.
Tsis tas li ntawd cov ntawv luam tawm cua sov yog nyob rau hauv ib lub hnab ntawv qaug zog. Thaum kawg lub neej kev pab cuam yog txiav txim los ntawm thermal thiab dabtsi yog khoov loads.
