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Aug 17, 2018 | was cleaned and by whom. 4. Want to have an automatic stop of the line for example if stencil was used more than 8 hours on the line. Then maybe you have to clean it or put in a spare one. It is very interesting approach to have that, but also requires a lot of efforts to realize it. Stencil life Traceability can be made for many things. It is up to the factory and what it wants to implement. You can have traceability on the stencil for a several reasons: 1. Want to check stencil cycles 2. Want to verify if stencil is the correct one loaded 3. Want to have a history of when the stencil
Jun 14, 2017 | IPA versus Stencil Cleaning Solution sorry, I can't give you best solution for IPA versus stencil cleaning. But if you need new stencil, I can recommend you one, five-star praise supplier, they have stencil or with frame, various size at cheap price below 30% market price
Jun 13, 2017 | IPA versus Stencil Cleaning Solution For many moons, I have used IPA for our cleaning tanks within out DEK systems. Now we have a new engineering team and he would like to try a stencil cleaning solution (DEK PRO XF). Can everyone tell me there pros and cons of using each of these over the years? Not necessarily DEK PRO XF but any cleaning solutions. We did see a study of IPA eventually over time leaving a film of paste on the walls of the stencil which led to this decision. We also have an ultrasonic stencil cleaner that at the end of the work order we will send to for a well-deserved cleaning.
Jan 20, 2015 | Hello We are currently cleaning stencils from both process (PbSn and lead free) in the same cleaning machine. A customer is concerned about cross contamination of lead between stencils. Is there any test kit or tool that you can suggest to test the level of PB contamination on a stencil? Stencil lead contamination test
Feb 19, 2014 | Are there any tricks to cleaning a stepped stencil while in use. There seems to always be paste left behind around the recesses of the stencil. We have tried many different wipe combinations and don't seem to be having much luck with it. The machine is a new MPM Momentum, and the way it cleans with the paper roll and solvent I just can't see how it would ever get all the paste out of the stencil. Is there any other attachments or setup to allow the stencil wiper to clean up into the stepped ridges of the stencil. Thanks, stepped stencils
Dec 6, 2013 | ultrasonic for sure.
Feb 5, 2013 | Yes.
Aug 17, 2012 | Stencil Cleaning by hand I would advise against using IPA for stencil cleaning It may initially seem to produce good results but the way it works you end up with more problems. IPA is good at removing liquid fluxes but it dries out and cements solid fluxes to the stencils. I have seen a stencil that was cleaned after every use with IPA and looked at some of the apertures under a microscope and it looked like tree rings of solid flux. Specific stencil cleaning fluids are designed to remove both liquid and solid fluxes
Aug 6, 2012 | Stencil Cleaning by hand Techspray makes a liquid called "Eco-Stencil SMT Stencil Cleaner" and also pre-saturated wipes by the same name. We spray the cleaner on the stencil and then use the wipes to clean the paste off of the stencil. Putting 1 wipe in each hand and rubbing both the top and bottom of the stencil at the same time has worked well for us. We clean the stencil as soon as we are done using it so that the paste does not have time to dry on the aperture walls. The cleaner dissolves the solder paste so if the paste is dried on you will need to let the cleaner soak on the stencil a few minutes to soften
Aug 3, 2012 | Stencil Cleaning by hand Not the best situation in the world, but you know that. Check with printer equipment suppliers [eg, DEK, MPM, etc] for a product called "Stencil Clean Wipes." Back in the old days, we'd: * Wipe the stencil with a solvent soaked wipe * Put the stencil in a bin filled with some liquid * Move 't access some of those sites.] Other suggestions: * For starters, you might consider increasing your cleaning frequency. Cleaning 'daily' might be just a bit too long between cleanings. * Can you rent [rent-to-buy] a stencil cleaner?
Aug 3, 2012 | Stencil Cleaning by hand Greetings everyone, I am trying to figure out away to clean our stencils by hand. Unfortunately, we do not have a stencil cleaner due to size and finance of our company. I am using Ionox to clean them daily.But the walls do not come clean. Is this a humidty related problem for Pb-Free solder , anyone experiencing this? Also, I am using Indium8.9 Pb-free type3 SAC and clean the stencils with Ionox I3400. Any help willl be deeply appreciated.Thank you in advance.
Apr 26, 2012 | Stencil Cleaning [AIM LeadFree] * Stencils should be cleaned frequently enough to ensure total removal of any bottom side residues, but not so infrequently as to allow the same residues to dry or cake on, making their removal much more difficult. * Some applications may require cleaning after every board printed, while others may be able to clean the stencil a surprising one time per shift, or even not at all. * Regardless of how often you do clean your stencil, one sure method of determining whether or not the job is getting done is to remove the stencil and visually inspect the bottom side Underscreen cleaning cycles
Mar 22, 2011 | > Make sure the paper is advancing correctly on > your stencil wiper. I have seen this cause major > issues. If the paper hangs up, it will smear > paste across the bottom of the stencil every time > it wipes. We are manually cleaning the stencil. While that is ok, we are now having to clean the stencil every 2-3 panels
Nov 5, 2010 | Using an air hose to clean stencils and Misprinted Board Cleaning Handbook at http://www.ipc.org. It covers a wealth of information about cleaning stencils and boards. The proper way is by using a stencil cleaning machine. I think you are right. According to IPC-7526 section 6.2 says that using compressed air to blow out paste will damage the stencil, especially between fine pitch apertures. It can also broadcast solder paste onto other surfaces or personnel. I recommend you download the free IPC-7526 Stencil
Nov 5, 2010 | Using an air hose to clean stencils What about trying to clean these stencils with a proper stencil cleaner? This way you wouldn't have to worry about sending anything airborne.
Nov 5, 2010 | Using an air hose to clean stencils The smallest particle sixe for type 3 paste in 25 microns. This is far to big to remain airborne.Therefore I would suggest to continue to use air to clean stencils as it does clean the apertures effectively.What solvent is used to clean the stencils?
Nov 2, 2010 | Michelle, Our experience with no-clean solder pastes has been that water washing a mis-print is a bad idea. We've found that DI water does not do a sufficient job removing the no-clean paste (the same goes for stencils). Instead, we have washed no-clean mis-prints using Isopropyl alcohol I need some clarification on washing boards that are no clean , or stencil wipes. cheers ..rob
Aug 20, 2010 | Solder Balls-No Clean Paste/ Article on Stencil Design Guideline Article to assist with Stencil Design Guidelines http://shanelo.co.za/technical_paper_about_stencil.htm
May 15, 2010 | Best practice for stencil cleanning We used to clean our stencils by hand as well but 2005 we steped up to a ppc-n29tp stencil ultrasonic cleaner has worked great for us I would suggest a machine cleaning system it gets the stencils more clean then doing it by hand
Mar 30, 2010 | Stencil Cleaning We currently use under-stencil wipe for in-process stencil cleaning. Our product goes in sensitive optical equip. Our customer is finding microscopic fibers we believe are coming from stencil wiping paper. Can anyone recommend a different process or device that can be used in-process? We also use UT water cleaning but need something that can be used in-process.
Sep 18, 2009 | I am having problem on the cleaning of our Cyberclean 2000. There is enough chemical, and the wash pressure is also obtained. Yet after performing a cycle, the stencil is not cleaned. What could be a possible cause of not cleaning the stencil? Cyberclean 2000 Stencil Cleaner
Aug 31, 2009 | Drying SMT Stencils Post Sonic Cleaning We have tried air drying (using shop air) our SMT stencil post sonic cleaning. This technique only "pushes" the water droplet around to the other side of the stencil. Air drying causes the "Invar" stencils to rust as the water sits on the stencil surface for a while. Does anyone have a better /good way to dry these stencils. Regards BWET
Aug 28, 2009 | Do you clean the stencil manually or using the automated under-stencil cleaner on your Printer (recommended)? 1. Ensure that stencil wipes are lint-free and soaked sufficiently with solvent before use. 2. If your printer supports automated cleaning, you should use a vacuum swipe after solvent clean, especially due to presence of finepitch appertures. 3. If you adopt the manual cleaning method, you could use an external air jet to remove cleaning wipe residue if entrapped in finepitch appertures, by supporting these using a solvent soaked wipe held at opposite side.
Feb 7, 2008 | I would advise that you clean the stencil thoroughly at least every 4 hours, also though it is worth cleaning the stencil top and bottom after any breaktimes. To avoid solder paste drying off in stencil apertures. Best piece of kit I've purchased was a On-Contact Ultrasonic stencil cleaner
Jan 30, 2008 | On the DEK Horizon there are two options for underside cleaning one is a foam cleaner and paper cleaner that advances. The Foam cleaner cleans using liquid but does not increment and foam piece and can be washed but there are still contaminents. We have both types of underside stencil cleaning DEK Horizon Underside Stencil cleaner
Dec 14, 2007 | Good day, I want to skip operator job manual cleaning for stencil every 1/2 hours coz my machine already have auto cleaning. pls help me to explain to my bos the defect of manual cleaning compare with auto cleaning. pls advice My sp type is DEK machine. MANUAL CLEANING VS AUTO CLEANING
Dec 6, 2007 | hi, we use pump print stencil and have problem with cleaning.we clean the stencil handling, using zestron301, but in the holes stay adhesive.Take a test with ultrasonic cleaner but resalt is not good. pump print stencil
Jan 23, 2007 | Which stencil cleaners are RoHS compliant and cost effective? (We are currently using IPA for stencil cleaning, but there are some problems.So, we suggest to use VIGON SC 200?Is it good for stencil cleaning? Or any other suggestions?) Stencil cleaner
Jan 18, 2007 | Wondering if anyone is using cleaning solutions that are safe to use and store, and don't cost an arm and a leg. Cleaning tasks would include solder paste stencil cleaning, misprinted PCB cleaning, flux cleaning after rework, and so on and so forth. Would really appreciate your advice. Affordable, non-flammable cleaning solutions?
Jan 11, 2007 | Thanks all
Jan 4, 2007 | Incoming! *ducks*
Jan 3, 2007 | Stencil Cleaning We will cleaning the Stencil after screen printing for 3 or 5 or 7 panels. I want to ask how to define the Stencil cleaning frequency?
Aug 16, 2006 | Stencil cleaning You can stop cleaning after a job when there is no more paste in the apertures. Under wiping should be done with a quality cloth and should leave no paste on the underside of the stencil (assures good contact on the next print and reduces chances of solderballs) and should leave no cleaning liquid (e.g. alcohol) on the stencil.
Jun 15, 2006 | Stencil cleaning Just to add to what dave said, the only limitation to how frequently you clean is the cost of the cleaning medium. You can wipe every board if you want to, but you'll go through material accordingly. If you're printing 16mil pitch or smaller, cleaning every other cycle isn't out of the question but it depends on how well your stencils gasket the board (surface finish, stencil alignment), your paste rheology, etc.
Jun 14, 2006 | Stencil cleaning used for glue. * Paper is used as a stencil underwipe to clean the bottom of the stencil during production as a function of printer operation. * Dedicated ultrasonic or water wash cleaners clean both sides of the stencil off-line during a stoppage of production or [as mentioned earlier] at the end of a Bryan: * Most of our stencils are made from stainless steel that is held by a aluminum frame, attached with epoxy with a fiber glass intermediary between the frame and the stencil. * We use stencils to print either glue [thermoset epoxy] or solder paste * Plastic stencils are almost exclusively
Jun 14, 2006 | Stencil cleaning I would like to know if there is any information regarding how often to clean the stencil by the printer cleaning system. I am running a board with an ultra fine pithc QFP. Is there any guide available? Regards, Mario A. Berrocal
May 30, 2006 | Stencil cleaning Your aqueous (spray) and ultrasonic methods refer to cleaning of the stencil for storage between jobs. All others would be most common as in-process cleaning methods, whether with cloth or paper products.
Apr 4, 2006 | Here's a "flameless" reply... I�ll allow others to recommend� Here is a list of the �usual suspects�: Aqueous Technologies Batch and inline de-fluxers Ultrasonic stencil cleaning systems De-fluxing and stencil cleaning chemicals www.aqueoustech.com Austin American Technology Batch and inline de -fluxers Spray-in-air stencil cleaning systems De-fluxing and stencil cleaning chemicals www.aat-corp.com UnitDesign Batch de-fluxers Manual stencil cleaning systems www.unitdesign.com SmartSonic Ultrasonic stencil cleaning systems Stencil cleaning chemicals www.smartsonic.com PMR Systems Ultrasonic stencil cleaning systems Stencil cleaning chemicals www.pmrsystems.com Speedline Inline de-fluxers www.speedlinetechnologies.com Pressure Products Ultrasonic stencil cleaning systems www.pressureproducts.com EMC Global Technology Batch de-fluxers Spray-in-air stencil cleaning systems www
Apr 3, 2006 | My favorite thread was when those 2 presidents of prominent stencil cleaning companies got into a flame war. Stencil Cleaners
Feb 1, 2006 | There are several makes of stencil cleaning equipment. The previous post mentioned, Aqueous Tech (www.aqueoustech.com). Others of long standing high reputation are EMC Global (www.emcgti.com), Austin American Technology (www.aat-corp.com), and Technical Devices (www.technicaldev.com). It is very important to consider the cleaning agents prior to purchasing the equipment. Remember, a stencil cleaning system is a good machine using a good, well matched, modern chemistry. Kyzen (www.kyzen.com) has a full line of stencil cleaning materials that will be very effective in the fine machines sold by each Stencil and board Ultrasonic cleaner
Nov 7, 2005 | Solvent for stencil cleaning Good day, What type of solvent are you using for stencil cleaning during production? Does anybody use VIGON SC202 for stencil cleaning? What type of solvent can you recommend? Thank you. BR, Pavel
Oct 21, 2005 | stencil cleaning 1.- Clean bottom and top stencil with a cloth/alcohol at same time.Pay special attention to fine pitch locations. 2.- Clean again bottom stencil side .To prevent any residual of solder 3.- Blow air with a air gun under the stencil to remove the solder in the aperture, specially on fine pitch points.
Oct 17, 2005 | stencil cleaning There are a lot of things that might affect your cleaning efficiency. Paste type (no clean or w/s?), cleaning chemistry, aperture aspect ratio (aperture width/stencil thickness), "linty" wipes, etc. Another thing you need to look at is the frequency you print. If you print every 30 seconds you
Oct 14, 2005 | stencil cleaning We encounter this kind of issue. We use stencil clean in the stencil printer and also use air to blow aperture after cleaning. We are having some luck !!
Oct 14, 2005 | Manual Stencil Cleaning Solvent wow....i would love to see the compressor that can damage a stencil.
Oct 11, 2005 | stencil cleaning HI We start to make a product which have a 0.4 mm pitch IC and start having problems with not enough solder printed, to solve this problem we had to increase the manual cleaning, now we are cleaning the stencil every 8 printings, before we was running models with 0.5 mm pitch IC's without any problem (cleaning stencil every 15 pcb's) Do you have any recommendation about solvent to clean the stencil, right now we are cleaning with regular alcohol ? We want to reduce the printing defects and reduce the manual stencil cleaning frequency. I will appreciate your support.
Oct 10, 2005 | hi We start to make a product which have a 0.4 mm pitch IC and start having problems with not enough solder printed, to solve this problem we had to increase the manual cleaning, now we are cleaning the stencil every 8 printings, before we was running models with 0.5 mm pitch IC's without any problem (cleaning stencil every 15 pcb's) Do you have any recommendation about solvent to clean the stencil, right now we are cleaning with regular alcohol ? We want to reduce the printing defects and reduce the manual stencil cleaning frequency. I will appreciate your support. stencil cleanin
Oct 7, 2005 | Manual Stencil Cleaning Solvent Hi, Can anyone suggest what solvents are the best for manual stencil cleaning?? we are currently using alcohol wipes, but the fine pitch apertures still have solder paste stuck in between them. We should ideallyhave a stencil cleaner, but until that gets here, I need information on any solvents that are effective than alcohol in dissolving/removing the solder paste from the stencil (RMA flux chemistry) Thanks...Amol
Aug 23, 2005 | Stencil Cleaning / Zestron / Vigon Is there anyone out there using Zestron Vigon SC200 stencil cleaning solution? We were told that it can be used to clean SMT adhesive, water soluble, and no clean paste flux. Can anyone tell me anything about this stuff ?
Jun 28, 2005 | What is your stencil cleaning procesor.It sould not be wet after cleaning & what is room tempreture.?
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