stencil cleaning

"stencil cleaning" search results in the Electronics Forums



9814 result s found for "stencil cleaning" in the Electronics Forums

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What were your top go-to sources for electronics information and learning in 2018

Nov 6, 2018 | and processes involved in electronic products manufacturing including: solder and soldering technology, printing, cleaning, test and inspection, pick and place, repair and reworks, materials and components. NASA Tech Briefs features exclusive reports of innovations developed by NASA and its industry partners

Flason SMT Products

Oct 4, 2018 | class=roll href="http://www.flason-smt.com/product/Second-hand-SMT-stencil-printer-factory-Manufacturer.html" target="_blank">http://www.flason-smt.com/product/Second-hand-SMT-stencil-printer-factory-Manufacturer.html http://www.flason-smt.com/product/Selective-Wave-Soldering-Machine.html http://www.flason-smt.com/product/Semi-Auto-SMT-Stencil

Foam fluxer maintenance, storage and cleaning

Nov 9, 2015 | Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or chec

Inventory control and maintenance

Feb 26, 2015 | for accurate part tracking. The user interface just plain sucks as well. I wrote a nice windows interface to the underlying progressive database tables so we could chuck the clunky interface and have a nice clean gui that was tailored to our needs as a CM. This helped a LOT, but I found myself adding new

Possibility of a cheaper pick and place machine design?

Jul 4, 2014 | the circuit board and hit the workarea instead. Perhaps a sheet of paper should cover the workarea. Also, the magnet may stay clean by taking cover under a tent. Another problem is that some computer chips and other components may be attracted to the magnets... perhaps in those cases the magnet can still

In search of knowledge

Oct 18, 2012 | while eating at her desk. This is a whole other topic that I need help with.)made a universal router for all boards. By cleaning them up I mean to make them all very specific as to what needs to be done on each individual product. I am assuming I can eliminate extra processes once I start my time study

In search of knowledge

Oct 16, 2012 | . But of course due to budget constraints I ended up with a system that needs some maintenance and I have no experience in the operation of the unit. Same goes for the conveyors that I purchased to help move product and reduce labor at wave solder entry and exit points.) 5.) Clean up and create new routers. 6

Measure humidity for PCB

Apr 13, 2010 | to handle the test sample/coupons to prevent handling contamination. The tweezers shall be cleaned prior to each test sample/coupon weighing session. 4.4 Gloves shall be used when handling the test samples/coupons to prevent handling contamination. The gloves shall not contribute any contamination material

Help me to impress my boss

Apr 2, 2007 | should be put in one location so the maintenance guy doesn't have to practice yoga with a grease gun. How about filters. Why are there filters for each nozzle? Why not just one filter since all you�re doing is keeping the vacuum clean. Sales may suffer, but maintenance will love it. Can anyone

Books for SMT

Jan 16, 2007 | and Practice; Ray P. Prasad; Kluwer Academic Publishers; ISBN: 0412129213; 2nd edition; [April 1997] Cleaning Aqueous Cleaning Handbook; MC McLaughlin, AS Zisman; Morris-Lee Publishing Group; ISBN: 096453567X; [1998] Cleaning And Contamination Of Electronics Components And Assemblies; BN Ellis ; Electrochemical Publications; ISBN 0901150207 Handbook for Critical Cleaning; Barbara & Ed Kanegsberg; CRC Press; ISBN: 0849316553; [December 2000] Handbook of Aqueous Cleaning Technology For Electronic Assemblies; FR Cala, AE Winston; Electrochemical Publications; ISBN: 0901150312; [1996] Components Passive

Used Equipment from China

Aug 12, 2005 | . Dealers such as myself and the mentioned IBE actually own the equipment they are selling in most cases and have gone through the machines in their own facility...inspected, tested, cleaned etc. and therefore are willing to stand behind them a heck of a lot more than a broker could. So in summary

Dross produced, are we in or out?

May 24, 2005 | steel -- will have exposed iron available for dissolution into the solder. Excessive cleaning of the pot walls with a wire brush can also introduce iron into the solder. The problem associated with iron contamination is excessive drossing which usually clears up as the iron compounds are removed

Military Lamina bake-out

Aug 3, 2002 | With Baking 1.5.1.1---Cross Contamination.--- Certain baking operations volatize (drive off) materials which may contaminate subsequent work process through the oven. Consider separate ovens for these functions improved venting, or more frequent cleaning. 1.5.1.2---Excessive Baking (Over

Ag-plated LED dipping - high level of Cu and Ag

Aug 15, 2001 | . An improperly alloyed solder using too much heat could contain excessive iron. A new solder pot -- whether cast iron, cold-rolled steel or stainless steel -- will have exposed iron available for dissolution into the solder. Excessive cleaning of the pot walls with a wire brush can also introduce iron

High tin content @ Wavesolder

Feb 27, 2001 | -rolled steel or stainless steel -- will have exposed iron available for dissolution into the solder. Excessive cleaning of the pot walls with a wire brush can also introduce iron into the solder. The problem associated with iron contamination is excessive drossing which usually clears up as the iron compounds

Books Available to Review at SMTnet

May 24, 2000 | density boards. Substrates for RF and microwave systems Advanced ceramic substrates for microelectronics. Flexible circuits for advanced electronic systems. Design of high-performance circuit boards. Soldering and cleaning Environmentally conscious materials. Reliability If you work with fine

soldering books

May 8, 2000 | on board cleaning published by Electrochemical Publications � same as THE BOOK and other books focused on electronic assembly. Forth, continuing with SMTnet, they have probably the broadest and longest list of industry books out there, many with extensive reviews attached. Fifth, Bob Willis, who also

Dross/Oxide problems with wave soldering machine

Jan 31, 2000 | your pump, nozzles, and screens. That�s why they encourage PM on their machines. 4 The first thing, I�d suggest is removing and cleaning the pumping mechanism. Next, if you still have dross through the wave, remove plates and nozzles and give them good scrubbing to remove crusty layers of dross from

BGA step by step

Sep 27, 1999 | single pad. It had collapsed but did not effect a solder joint. I removed the device, and some others. After site cleaning, though not really needed, close inspection revealed a single "dark" pad with no signs of solder wetting or gold. After this incident, many other isolated pads appeared during a

Soldering to Gold

Sep 17, 1999 | into an epoxy mass: never once had a fracture in service and some of these were in service for 15 years under fairly nasty climatic conditions. What I'm suggesting here is that cleaning + conformal coating MAY provide sufficient mechanical support to prevent them 'orrible intermetallics from causing cracking

Soldering to Gold

Sep 17, 1999 | : never once had a fracture in service and some of these were in service for 15 years under fairly nasty climatic conditions. What I'm suggesting here is that cleaning + conformal coating MAY provide sufficient mechanical support to prevent them 'orrible intermetallics from causing cracking if you don

Electronic manufacturing company near the beach.

Sep 17, 1999 | . Until they are rained out (i.e. a drop of rain actually hits them) they will remain in suspension, at the vagaries of any wind or air current. Only a class 100 clean room would be reasonably proof against them. | | | | If ionic contamination on your assemblies is likely to be a serious problem, my

solder mask

Aug 11, 1999 | | | | Easy goods-in polymerisation check: clean, white, cotton cloth: wrap it round a suitably gloved finger and pour a few drops of methylene chloride (! toxic) onto the end of the finger and rub it onto the bare board for a minute or so. If it comes away coloured, reject the boards. (These

Re: little green men

Jul 17, 1999 | soldering with RMA flux and they didn't do ANY cleaning (there wasn't a cleaner anywhere on the production floor!). Looks like crap but the ME said "who cares, they won't see it anyway... and by the time the flux starts to be a problem, the product will be sitting in a land fill...". And this is from a

HASL - again?

Jun 18, 1999 | no clean, but not VOC free, and the other RMA). Just don't mis-print paste more than once. We do. | | | | String hell. Look what you've done. You just started one. But for Dave F., we need a solder guru and more support for dictionary justice as facts from the horses mouth. You know, like an expert

HASL - again?

Jun 18, 1999 | . | | | Jason, | | The first time we saw OCC/OSP in our operation, no one noticed. It just looked a little off color from gold. It looks a whole lot different, but who would have guessed. It looks a whole lot different than HASL. It performs pretty well for our two paste types (one no clean, but not VOC free

bare board problem

Jun 18, 1999 | . | | Know what? I was using seal brite as recently as 4 years ago, due to a customer's requirement---and I successfully used a no-clean paste on it for SMT!!!!! Interesting times...... | | | | | Paper phenolic. What a material! What boards! Ah, the days of punch and crunch revisited. | | Yes, I built

bare board problem

Jun 18, 1999 | was using seal brite as recently as 4 years ago, due to a customer's requirement---and I successfully used a no-clean paste on it for SMT!!!!! Interesting times...... | | Paper phenolic. What a material! What boards! Ah, the days of punch and crunch revisited. Yes, I built the entire "Pong" program

HASL - again?

Jun 18, 1999 | noticed. It just looked a little off color from gold. It looks a whole lot different, but who would have guessed. It looks a whole lot different than HASL. It performs pretty well for our two paste types (one no clean, but not VOC free, and the other RMA). Just don't mis-print paste more than once. We do

Wave Solder Problems - VIA HOLES

Jun 8, 1999 | , that hasn't been mentioned is adhesive residue in the holes. If the bottomside operators get a bad glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board, it likes to sneak into those

Wave Solder Problems - VIA HOLES

Jun 8, 1999 | , that hasn't been mentioned is adhesive residue in the holes. If the bottomside operators get a bad glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board, it likes to sneak into those

Wave Solder Problems - VIA HOLES

Jun 7, 1999 | . They can get obstucted with flux solids if your operators let the solvent tank run empty. If they are clean, check the height of the fluxer itself. You can move it closer or farther away by turning the mounting nuts for the pan on the fluxer. Nothing against Electrovert's field service guys, but some

Wave Solder Problems - VIA HOLES

Jun 7, 1999 | encountered in the past, however, that hasn't been mentioned is adhesive residue in the holes. If the bottomside operators get a bad glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board

Wave Solder Problems - VIA HOLES

Jun 4, 1999 | in the past, however, that hasn't been mentioned is adhesive residue in the holes. If the bottomside operators get a bad glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board, it likes

Wave Solder Problems - VIA HOLES

Jun 4, 1999 | , that hasn't been mentioned is adhesive residue in the holes. If the bottomside operators get a bad glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board, it likes to sneak into those

Wave Solder Problems - VIA HOLES

Jun 4, 1999 | , that hasn't been mentioned is adhesive residue in the holes. If the bottomside operators get a bad glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board, it likes to sneak into those

Wave Solder Problems - VIA HOLES

Jun 4, 1999 | glue print (or dispense) and clean off the board, they get the surface free of adhesive, but don't always check the holes. When you're wiping or squeegeeing glue off the board, it likes to sneak into those holes and hide there, silently waiting to hose up your soldering process. If there is adhesive

Process Change

Jun 3, 1999 | solder paste and flux type as no-clean. We do use one reflow profile in air and another in nitrogen - and on it goes. | | | | | | I guess what I'm saying is a lot of thought went into these complicated processes. It has paid off for us though very few outside CM's are even interested in our business

Process Change

Jun 3, 1999 | solder paste and flux type as no-clean. We do use one reflow profile in air and another in nitrogen - and on it goes. | | | | | | I guess what I'm saying is a lot of thought went into these complicated processes. It has paid off for us though very few outside CM's are even interested in our business

Detecting lifted leads on QFPs

May 28, 1999 | paste with it to stop the leaching. Semi aqueous paste, umm, dunno, we'll need to ask the body of the hall on that, I'm strickly a no clean kinda guy. ha now the oven.... If your getting 'float' from circulating air ..then your oven set up is way off base. I've seen folk's getting problems with the air

VOC Free Flux

May 14, 1999 | as anyone can remember. | | | | When we put the top two VOC-frees (Heraeus SURF11 and Alpha NR 310B) head to head, the operators made a list of important criteria. Ease of cleanup was one of them; smell of boards at the exit was another. It seems that the Alpha cleaned up relatively easily and had

VOC Free Flux

May 14, 1999 | SURF11 and Alpha NR 310B) head to head, the operators made a list of important criteria. Ease of cleanup was one of them; smell of boards at the exit was another. It seems that the Alpha cleaned up relatively easily and had the least obnoxious smell, especailly when compared to the Kester 970 that we

VOC Free Flux

May 14, 1999 | criteria. Ease of cleanup was one of them; smell of boards at the exit was another. It seems that the Alpha cleaned up relatively easily and had the least obnoxious smell, especailly when compared to the Kester 970 that we had been using. I think these issues are all part of the game with the VOC

Radial capacitors have water gain

May 10, 1999 | and presures. Hey, SM technology is producing smaller clearances to clean and greater density, the preasure (pun intended) is toward higher preasures. The water temperature is already at the minimum specified by the flux manufactures. Most vendors claim only a few shops have these problems. | | | | I

Radial capacitors have water gain

May 10, 1999 | and presures. Hey, SM technology is producing smaller clearances to clean and greater density, the preasure (pun intended) is toward higher preasures. The water temperature is already at the minimum specified by the flux manufactures. Most vendors claim only a few shops have these problems. | | I

Setting up solder material evaluation (suggestions?)

May 10, 1999 | chunks of crap (3-5mm) in solder that was suppoed to be very pure, in addition to powdery oxides. I'll send you a copy of the bar eval. | | With flux, there's a lot of good no-cleans out there that can handle most boards. There's a few that can handle the really tough boards. My approach on the flux

Setting up solder material evaluation (suggestions?)

May 4, 1999 | , in addition to powdery oxides. I'll send you a copy of the bar eval. With flux, there's a lot of good no-cleans out there that can handle most boards. There's a few that can handle the really tough boards. My approach on the flux is to figure out what's important - topside fillets, residues, solderballs

Hey Guys, you gotta check this out!

Apr 26, 1999 | thick stencil for 15.7-mil and MicroBGA by the way... | | Sure you don't wanna take this off my hands? | | -Steve "How did I get in this mess?" Gregory- | --------------:o Yea, I get that a lot, my main nitch is doing proto work. Give a guy PCB design software and he thinks he 'r' one. I could go

Hey Guys, you gotta check this out!

Apr 26, 1999 | thick stencil for 15.7-mil and MicroBGA by the way... | | Sure you don't wanna take this off my hands? | | -Steve "How did I get in this mess?" Gregory- | Steve, You're going the right way. One thing you want to watch though is your profile on this puppy. That .016" QFP is right behind the smaller

Cleaning procedures for Entek-Plus Cu-106A

Apr 26, 1999 | Re: Cleaning procedures for Entek-Plus Cu-106A

Defluxing Advanced Packages

used pcb assembly equipment - lel semi