Tshooj 1 Cov Kev Qhia Txog Tus Kheej Feem Ntau ntawm SMT polar Cheebtsam

Kev saib xyuas tshwj xeeb yuav tsum tau them rau cov ntsiab lus polarity thoob plaws hauv cov txheej txheem PCBA, vim tias cov kev taw qhia tsis raug tuaj yeem ua rau muaj kev sib tsoo thiab tsis ua haujlwm ntawm tag nrho PCBA pawg thawj coj saib.Yog li, nws yog ib qho tseem ceeb heev rau engineering thiab cov neeg ua haujlwm tsim khoom kom nkag siab SMT polarity ntsiab.

I. Kev txhais ntawm polarity
Polarity hais txog qhov zoo thiab qhov tsis zoo los yog thawj tus pins ntawm cov khoom yog nyob rau tib qho kev taw qhia nrog cov PCB (luam tawm Circuit Board).Yog hais tias cov kev taw qhia ntawm cov khoom thiab PCB tsis sib xws, nws yog hu ua phem rov qab.

II.Txoj kev txheeb xyuas polarity
1. Resistor ntawm hom nti yog tsis muaj polarity

2. Capacitor (Capacitor)

2.1 Ceramic capacitor yog tsis-polar

2.2 Tantalum capacitor yog polar.PCB pawg thawj coj saib thiab ntaus ntawv zoo ncej: 1) Ribbon labeling;2) Kos "+";3) Bevel marking.

2.3 Aluminium electrolytic capacitor muaj polarity.Daim ntawv lo: cov xim band sawv cev tsis zoo;PCB marking: Cov ribbon lossis "+" sawv cev rau tus ncej zoo.

3. Inductor

3.1 Tsis muaj polarity yuav tsum tau rau ob lub vuam kawg pob xws li chip coil.

3.2 Multi-pin inductors muaj qhov xav tau polarity.Cov cim cim: dot/ "1" sawv cev rau polarity point;Kos rau ntawm PCB: Dot/circle/" * "qhia polarity.

4. Lub teeb Emitting Diode

4.1 LUB SMT rooj ntawv nplaum LED muaj polarity.Cov cim tsis zoo: ntsuab yog qhov tsis zoo;PCB tsis zoo cim: 1) ntsug bar, 2) ribbon, 3) silk screen ntse lub kaum sab xis;4) Kev tshuaj ntsuam luam ntawv yog "tus neeg sawv cev" lub thawv.

5. Diode (9W)
5.1 Lub diode nrog SMT rooj paste muaj polarity.Cov cim tsis zoo: 1) ribbon, 2) zawj, 3) xim cim (vitreous);PCB modernizing chav: 1) ntsug bar, 2) ribbon, 3) npo luam ntawv horn, 4) "Modernizing" lub thawv.

NeoDen muab tag nrho SMT sib dhos kab kev daws teeb meem, suav nrog SMT reflow qhov cub, yoj lub tshuab siv lub tshuab, tuaj tos thiab tso tshuab, tshuab luam ntawv tshuab luam ntawv, Reflow qhov cub, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X- Ray tshuab, SMT sib dhos kab khoom, PCB ntau lawm Equipment SMT spare qhov chaw, thiab lwm yam yam SMT tshuab koj xav tau, thov hu rau peb kom paub ntau ntxiv:

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