stencil cleaning

"stencil cleaning" search results in the Electronics Forums



9815 result s found for "stencil cleaning" in the Electronics Forums

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SMT LINE CHOICE

Mar 18, 2018 | printing feature seduce you too much for prototyping, while it seems such a cool idea it takes a lot of $200 stencils to cover the cost of adding and maintaining dispensing system. 20" wide boards will probably be your most limiting factor most large board variants increase the length they can handle

Chinese Production SMT Machines???

Mar 2, 2018 | with defective parts, software upgrades etc. I will tell you my experience with Chinese Stencil printer manufacturer: I paid $31K for printer just looking at the specs like you do now. Then I paid about $10K for transport, import taxes and duties. The manufacturer seems to be legit "Shenzhen Huancheng

First time Pick and Place Machine

Jul 21, 2017 | love to do this and I'm still waiting on a quote for a Samsung SM482 which looks like an excellent machine. However even in the best case I think it will be $20-$30k more with shipping for just the PnP + feeders, not including the oven/stencil/etc... If I just had a little more money I could do

Lead trimming

Jul 19, 2016 | assembly solutions, manual & automated stencil printers, manual & automatic pick & place systems with dispensers, wave solder & selective solder machines, lead free solder reflow ovens, component counters, & thru-hole King of Prussia, Pennsylvania, USA Manufacturer of Assembly Equipment, Pick and Place

85K grant. How best to use?

May 20, 2016 | and place setup : Perhaps a manual or semi automatic stencil printer, a "basic" PnP machine (Dima ATOZ pp-050 or Essemtec Lynx/Fox) with enough feeders, and a basic reflow oven. - Invest in even more basic production setup: A dispenser, a table-top reflow oven, etc. - Invest in quality rework equipment

MPM UP2000

Sep 30, 2015 | it on the camera was blur and could not recognize the fiducials properly. The FP mode setting in the setup menu is set to 0. I managed to adjust the camera so tha the board fiducials are clear but the stencil fiducial is still a little blur but the machine recognizes it. When I start production the X axis vision

MPM Accuflex, Lost Vision

Aug 13, 2015 | The camera assembly is designated as X23; the stencil & board lighting as well as the camera video signal pass through the DB9 connector at the camera. There is a ribbon cable in the vision gantry tray that carries both to the box on the left side of the vision gantry. Inside the box is the X65

Manual SMT equipment

Dec 3, 2014 | to get a 'feel' for it. Manual printers come in a bewildering array of options including those that can handle the small freebie stencils you get with prototype PCB's. These start at the basic clamshell and move up to those with vertical seperation, PCB fixtures and a powered squeegee. At around £6k/$10k

MPM UP2000 6410 Driver Cards Failing

Nov 25, 2014 | We have an MPM UP2000 stencil printer and have a lot of issues with burned out 6410 driver cards (or driver cards just failing to work). I have looked over these threads and found that this is a common issue with these cards. I understand that these cards are old and are hard to come by (they

BGA rework equipment - suggestions?

Aug 4, 2014 | these models would be great. The question I would ask is, how do you handle parts that ideally you would like to place with paste after reworking rather than just a big dollop of flux? I know you can get tiny stencils or peelable masks but these are comparatively expensive solutions for low volume and may

Auto stencil printer or AOI

May 24, 2012 | While buying a used printer may seem like a good value up front, you may be taking risks and making

Damaged PCB.. what do you think?

Mar 16, 2012 | using a small saw or milling cutter. All delaminated material must also be removed--cutting down to undamaged board material. Cut a straight, clean edge and file the edge to ensure flatness. The new edge must be at a 90[degrees] angle to the board surfaces. Clean the area before and after cutting

Researching placement machines - where do I start?!

Nov 6, 2009 | adlsmt - I do apply paste (Kester EP256) by hand to the boards now with 5 mil thick stainless steel stencils. A few of the parts almost always need rework, though, either because I didn't place them accurately or there's too much paste, or it got smeared. I dunno, I'm a design engineer

Dymax vs Humiseal Urethane Confomals.... Anyone?

Feb 3, 2009 | of cross contamination and it was compatible with our no clean flux. It was also a UV cured process. It is amazing that coating can cure that fast 12 seconds a board. It was not good for and Hand solder repair after it had been coated. It was super hard. Smelled awfull. The 1A33 was a different story . Very tempermental coating. I have spent days and days setting up this process. You will need to research the compatibilty with your No-Clean process smt/wave if you have one. We have a customer that has some very demanding keepouts. The most difficult part about this particular coating is its

non-wet on 0402 mounted on OSP & lead free paste

Oct 17, 2008 | this part #. 0201's don't have this reject. 7. I tried different stencil aperture design and I improve my defect rate from ~3000 PPM to ~1000PPM in a week. 8. Also, the reject happens randomly in every lot. Like 80% of the batch processed in a week don't have this reject (PPM < 100), but 20 % of the batch

QFNs (LCCs)

Dec 22, 2006 | is needed, but still the heat transfer has to work. There are some calculation to be done of how the optimum stencil aperture shold be done. Sometimes; a lot of circles, 4 smaller qsuares, one resized rectangle etc. This vary a lot between different packages and most important; how much effect

0.4mm PCB Thickness - production issues

Sep 13, 2006 | stencil will not have any obstruction including any locator pins, nor get down during printing like a banana? Please don't hesitate to get more info, if I have been unclear. Any ideas will be greatly appreciated. /Sincerely, Ps. Sorry for my poor english and grammar. Ds.

Gel Flex Support

Nov 3, 2005 | 30 misprints a day using the Grid Loc. It did almost justify a stencil washer! Then when they recommended the weight bags to hold the board down when "programming" the device, it started getting into that operator dependent area you were talking about. Plus, waiting for a board to get

25 mil QFP soldering issue

Jul 15, 2004 | mil pitch part, 85/15 finish. PCB pads are HASL finish 80x14 mils with 4-layer medium complexity board. Stencil is stainless steel, 6 mils thick, 70x12 mil apertures Paste is Alpha WS609 water-soluble. Placement with Panasonic MPAG3, co-planarity settings are tight and thickness is set correctly

Indium NC-SMQ92J paste problems

May 17, 2004 | the print appetures on your stencil to allow for that. JW

Incoming Water Quality

Jun 11, 2001 | , wave, and hand soldering operations. * Handling of these materials. * Cleaning operations. All of the minerals [and other stuff] in water affect its resistivity [megohm-cm], er conductivity {1/[resistivity]} in microsiemens-cm, either of which can be measured. Our tap water is ~50k ohm. Public water

OSP vs HASL

May 14, 2001 | Continuing along the path that Brian took ... IPC-7525 gives design guideline for stepped stencils. It goes something like: * Stepped area SB GT 25 thou from pads located on the greatest thickness of the stencil * Pads in stepped area SB GT 35 thou from the step for each thou that the stencil

Thermocouple attachment on fine pitch component.

Apr 11, 2001 | requires careful fixturing to insure that the thermocouple junction stays in contact with the surface to be measured, throughout the oven cure cycle. * It is difficult to remove this material cleanly, without damaging the board or component. � Quick curing epoxies like "5 minute" epoxy are rated

Desperately looking for help

Dec 13, 2000 | the component is missing carefully with solder wick which can be bought at any electronic shop for hobbyists for little money, - clean the area with isopropanol or something similar - apply a small amount of fresh solder ( use thin solder wire with flux core ) to one pad using one (small) iron with temperature

Desperately looking for help

Dec 13, 2000 | the component is missing carefully with solder wick which can be bought at any electronic shop for hobbyists for little money, - clean the area with isopropanol or something similar - apply a small amount of fresh solder ( use thin solder wire with flux core ) to one pad using one (small) iron with temperature

Solderability of BGA and PCB

Nov 20, 2000 | you asked these questions? To be specific regarding your question # 1: Baking will create some oxidation, it is a natural occurance. Normally, the amount of oxidation is negligible, barely measurable and is easily corrected by the reaction with flux. Flux in solder is there to clean, etch or prepare

DFM / DFT information

Jul 14, 2000 | to the high muckey demucks and now we have to clean-up the mess, by writing the document that�ll sit on book shelves, demonstrating the company�s dedication to the idea. The list is a little designer oriented, but then again, ideally they�re the el primo grande audience for design guidelines, anywho

DFM / DFT information

Jul 14, 2000 | to the high muckey demucks and now we have to clean-up the mess, by writing the document that�ll sit on book shelves, demonstrating the company�s dedication to the idea. The list is a little designer oriented, but then again, ideally they�re the el primo grande audience for design guidelines, anywho

Gold finger Protectors

May 15, 2000 | problem. 2. Any contamination that may get inside the glove can be transferred from board to board. Your operators should be alert to remove a contaminated glove from production and segragate it it for cleaning or disposal. 3. The product is produced to order from standard dies to cover fingers from 1

ESD Compliant - Air blow off to dry washed circuit board assemblies

Apr 12, 2000 | Ashok: You still didn�t tell me why you want additional drying of your boards, but what the hey, we all have our dark secrets. Anywho, let�s consider some options for reducing the moisture of your cleaned boards: OPTION 1 - Up-Grading Your Cleaner: Consider adding a module with an additional , since you have good compressed air supply that�s clean, moisture free, and well regulated and you�ve handled all the personal safety and Canadian occupational health & safety issues, two questions remain: 1 Will this do more bad than good to the circuit boards? Real question of product safety falls

Workmanship Standards

Apr 10, 2000 | and soldering criteria for through-hole, SMT and discrete wiring assemblies, mechanical assembly, cleaning, marking, coating, and laminate requirements. IPC-A-610 is invaluable for all inspectors, operators and trainers. It provides the industry with a clear representation of electronics acceptability criteria

Solder Mask Bubbling off after Wave Soldering

Apr 3, 2000 | reaction during the heating process. Of course, when we last used a brand new fixture, we still noticed the problem (even in areas not touched by the fixture).Thus, we are bringing in the rep for the flux manufacturer for suggestions/solutions, as well. We drain/clean the flux pot once a week, but I am

Immersion Silver PCB Surface Plating

Feb 2, 2000 | Dennis: Several points: 1 If you're talking AlphaLevel process (?): � Good solderability, as HASL, even no-cleans bite well. � Planarity, uniform deposit, no bridgin� of FP. � Doesn't store as well as NiAu ... LT 6 months sealed � Very sensitive to touch, more sensitive than OSP, if that

Handling of Moisture sensitive devices

Jan 27, 2000 | parts handling leads to � and on and on. Look at: "Handling of Highly-Moisture Sensitive Components - An Analysis of Low-Humidity Containment and Baking Schedules" http://www.ectc.net/Z5/s23p1.html Taking a different angle, some people, some no-clean people, store all their parts in controlled

CALCULATION EQUATION FOR 1 CHIP SOLDERING COST IN SMT PROCESS.

Jan 19, 2000 | company. Production Materials = I assumed this to be zero, but you could calculate the amount of solder used, if you wanted to drill-down for more detail. Here, I also assumed no-clean paste was acceptable. Overhead = Sum Of The Annual Plant Operating (ie, rent, gas, electric, water, capital costs

Immersion White Tin Process for PCB Finish

Jan 5, 2000 | run aqueous flux. Either way, it�s good when operators try to keep their mits off solderable surfaces of boards, regardless. So, what�s the intent of the gloves? Are you running no-clean? Tell me, if someone scratches their nose while wearing gloves, ... My2� Dave F

Flux sprayer set up

Dec 23, 1999 | not know what type of fluxes you are using.But here is what I did with some of my customers,based on solids content of less than 4%,we use 2.5liters/hour flowmeter adjsustment. For water soluble, we use lesser spray since the acid number is stronger. 7.General cleaning of spray box and daily purging

adhesive for ptfe boards

Oct 5, 1999 | hurried question. | G.D. | Gian At the risk of being obtuse, I think what you need is a conductive condition which will prevent the discharge and not a hypothetical insulation to contain it. There may be two ways to achieve this: the simplest is to direct clean water-saturated air to around the work would be to spray a fine mist of an anionic detergent over the boards: a water wash will remove it and it should not cause a loss of SIR after cleaning. Even so, you would require about 60% RH or more in the working areas, because this method would depend on the hygroscopicity of the surfactant. IMHO

Soldering to Gold

Sep 17, 1999 | 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't pre-tin but, for Crissake, do

Electronic manufacturing company near the beach.

Sep 16, 1999 | 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 advice is to go inshore

Electronic manufacturing company near the beach.

Sep 16, 1999 | 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 advice is to go inshore at least a few km, especially

DE-IONIZED WATER SUPPLIERS

Sep 11, 1999 | be in the 1 drum per month ballpark. We don't need mega-quality (1 MOHM would probably suffice) water, since we're only using it for cleaning wave solder fluxing equipment. | For the 10 litres/day, your best bet is a filter/mixed bed deioniser with, say, 50 - 100 litres of resins. With medium quality tap

DE-IONIZED WATER SUPPLIERS

Sep 9, 1999 | | | Hello SMTNEtters': | | | | Does anyone know of any suppliers who can supply De-I H20 (some high-quality H20!!) in 55 gallon containers. | | | | We have no use for "point-of-use" treatment, like mixed bed, anion, or cation tanks, or anything like that...we're a NO-CLEAN shop. | | | | We

Wave solder mystery

Aug 31, 1999 | direction the bad joint will become good and good joints will become bad. I have profiled to my no clean chemistry and have tried 6 thru 7 degree wave angle. Anyone have any thoughts! | Thanks in advance. | | Doug, Been there done that, cursed at it, and tried somthing else!!! Seriously, the clinch

Wave solder mystery

Aug 28, 1999 | but not at the bottom. This ALWAYS happens on joint where the clinched leads trail out of the wave. If I re-run the board a second time in the reverse direction the bad joint will become good and good joints will become bad. I have profiled to my no clean chemistry and have tried 6 thru 7 degree wave angle. Anyone have

Micropax continued

Aug 25, 1999 | . The thing works. After toiling to develop a brand new process, over three hours, the thing works. | | | | Of course, without my incredible talents and efforts, it never would have done it. BS, this machine melted solder fast, made removal easy and, most amazing to me, actually cleaned out those little tiny

Re: Air-Vac stuff

Aug 20, 1999 | component leads and when all joints are molten, the component is lifted from the board. | | | | � Cleaning the Holes: | | After component removal, an air cleaning hood is lowered against the board surface. Low pressure air is applied to the lead pattern, forcing the molten solder from all holes

Bridge on BGA

Aug 20, 1999 | solution is great. However, there can be other reasons for shorts. For example, after removal of the defective part you may damage the solder mask when cleaning the site, so you may have small areas of exposed copper between BGA pads, very close to the pads themselves. These can cause shorts too. You may

Serious stuff

Aug 19, 1999 | rework system. I was concerned with residual solder left on the pads, so we cleaned them extremely well. | | It helped fight this fire, on to the next. | | Doug | Doug, It worked pretty well this morning. I too was a bit surprised. It did nothing for my monster board so they are brining

oven ventilation requirements

Aug 5, 1999 | on distraction factors to employees (read how bad it stinks). | | Boca | | | For me it�s a hot subject, although I had an exhaust for the whole reflowunit the radial cooling fans blew out the stuff and that�s not chanel No5. Besides, cleaning was one of the most hated jobs in PM. It is said

Defluxing Advanced Packages

TWEEZER-VAC ELITE Vacuum SMD Tweezer Kit