Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


the perfect SMT line configuration

Elfego Sanchez

#2871

the perfect SMT line configuration | 28 September, 2000

Hi! Guys. I'm working in a SMT area and I want to have the best SMT line. What I want to know is: what would be the line configuration of a perfect SMT line?( automated solder printer-visual or automatic paste inspection-chip placement machine-IC placement machine-visual or automated inspection machine- reflow oven-visual or automated inspection-incircuit-X ray-repair station.....etc) also what kind of process controls are the required to assure 100% first time quality?. I know that this is a wide open question but let make the best SMT line all together

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Arturo

#2872

Re: the perfect SMT line configuration | 28 September, 2000

seems you are about to discover the missing link.

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C.K.

#2873

Re: the perfect SMT line configuration | 28 September, 2000

We've got a new machine here called the "Automated Voice-Activated Printed Circuit Board Assembly Center." Basically, the way it works is you upload all of the information to this machine (your BOM, CAD Data etc.), and then after it's programmed, you "tell" the machine which assembly you want, for example, "I want assemby XYZ." After that, it spits out a fully built Printed Circuit board built to your specifications and does it in 3.5 nano-seconds!!

It's from ACME Automation Company (1-800-345-ACME). The basic model starts out at $45,000,000,000,000.

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C.K.

#2874

Re: the perfect SMT line configuration | 29 September, 2000

We've got a new machine here called the "Automated Voice-Activated Printed Circuit Board Assembly Center." Basically, the way it works is you upload all of the information to this machine (your BOM, CAD Data, type of solder, etc.), and then after it's programmed, you "tell" the machine which assembly you want, for example, "I want assemby XYZ." After that, it spits out a fully built Printed Circuit board built to your specifications and does it in 3.5 nano-seconds!!

It's from ACME Automation Company (1-800-345-ACME). The basic model starts out at $45,000,000,000,000.

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#2875

Re: the perfect SMT line configuration | 30 September, 2000

beep beep

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jarnopy

#2876

Re: the perfect SMT line configuration | 30 September, 2000

Hi! What kind is perfect smt line? It's difficult question. First you must know what kind your production is. Do you have a serial production or do you have a lot of proto series? If you have only few different pcb then you must get placemant machine that speed is more than 20000 cmp/hour. And then you must get fully automatic pasteprinter. If you use bga, qfp, pllc packages then you must have vision in placement machine. If you make lot of little series then you can get machine that speed is 6000-20000 cmp/hour. And pasteprinter can be semi-automatic. But your question is so wide open that it is very difficult to answer. If you have any detail question you can mail to me. I'm sorry my bad english but i hope you understand something.

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Elfego

#2877

Re: the perfect SMT line configuration | 30 September, 2000

Thanks for your replay,The line should be capable of making 200pc boards by hour 600 components by pc board,placing chips 0402 and IC's 144 pins 20 mils, also has to work 24 hours a day and 12 hrs saturdays and Sundays. these are products for the automotive industry ( Audio Systems) Lets starts with the solder printing process: what kind of stencil shoul be? ejem: 6 or 4 mils tick? electroform or chemical edge? type of squeegees rubber or metal? inspection after the printer, visul 100% vs C chart or automated? what is the right solder paste high?

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DL

#2878

Re: the perfect SMT line configuration | 1 October, 2000

We also run this ACME machine. However, everytime I tell it to place parts, it tells me to hire someone

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jarnopy

#2879

Re: the perfect SMT line configuration | 1 October, 2000

Okay, you have only few different product. Smallest package is 0402 and biggest is 144 pins ic. So, maybe you don't need get high-speed machine. You must place about 12000cmp/hour. You can buy quite cheap placement machine. I can't tell what is good because i can't advertising here. Stencil MUST be steel. It's only GOOD stencil material. Good thickness is 0,15mm - 0,20mm. I use always 0,15mm. (I'm from Finland so i use millimeters). Laser cut stencil is good. Squeegees must be metal. Rubber is bad because it is too soft. If you have too soft squeegee then it wipe too much paste away. Paste inspection is enough good if you take example evry 20th pcb and check it with microscope. If process is working you don't need automatic visual inspector. But if you want know what is good machine or something like that, you can mail to me. My e-mail is jarnopy@hotmail.com.

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aaronho

#2880

Re: the perfect SMT line configuration | 2 October, 2000

Perfect to quality or to speed? No perfect thing exists, for the technologies is advancing.

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jsimpson

#2881

Re: the perfect SMT line configuration | 3 October, 2000

What company are you working with?

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Jeff

#2882

Re: the perfect SMT line configuration | 14 December, 2000

elfego, i used to wwork at a place with the following line layout:

* Loader * MPM Hi-E * Triscan Solder Inspection Machine (affectionately called the "Trashcan" by the technicians ;-) * 2 Phillips FCM fast chip mounters * 1 Phillips Topaz "hybrid" (8 nozzles, i think) * 2 Panasonic MPAs * 1 pre reflow inspection machine (forget name) * 1 oven * Unloader * Well place magazine to handle gate machine buffer

this line wasn't perfect, but it sure did rock and roll when folks were well trained.

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3D SPI

Plasma prior Conformal Coating