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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Which Screen Printer ?

Aug 7, 2019 | maintaince such part in standart manual. I needed to ask more information from our service when i had understood that usial cleaning and greasing not help for long time. 3) Two upper cameras instead of one camera block. No possible to view graved fiducials on bottom screen side. But it is not critical.

Component missing in siplace mounter

May 7, 2019 | Like I stated before, I am not familiar with the machine. I can only make suggestions. If you found solder paste on the nozzle, clean it off to prevent part stuck to the nozzle tip. I would also check if the nozzle tips are being worn off; uneven wear off would causing minor vacuum leaking, which

QFN standoff, industry standard

Mar 28, 2019 | " statements: * Stand-off should be consistent between assembly runs * Activate NC fluxes properly, since cleaning is difficult with low stand-off BTC * "Package standoff is a parameter affecting the reliability of BTC solder joints." ... "an increase in stand-off will result in lower strain in the I

Package rebake

Oct 24, 2018 | Hi everyone, I am new to this SMT. I have just graduated my study, have zero experience in SMT industry as I studied Automotive before. Ok lets proceed to the main objetive, I have a question regarding package rebake. From what I have learned, the package will go to flux cleaning process after

Bubbles after coating

Sep 20, 2018 | Hi all, I need some pro help me with issue bubbles after coating. some information for some pro: Machine: Asymtek Chemical: Achime AVR80 Oven: IA 4 zoon4 ( setting 100 100 90 80 conveyor speed: 0.6 m/min). I had happened before and after the oven. We had trouble shooting: - Clean the nozzle

Issue with Batch cleaner Aqueous

Sep 12, 2018 | Here's a link to an article regarding foam mitigation techniques. It my be helpful. There are many causes of foam. Water alone does not foam. Flux, solubilized in to the water can produce foam. Defluxing additives contain defaming agents which should prevent foam. There are several pre-cleaning

SMTnet Site: Need Your Input

Aug 2, 2018 | CATEGORIES Component Preparation SMT Assembly PTH Assembly Cleaning Rework, Repair Box Build Facilities Test Equipment - Board Fabrication Manufacturer of Products Semiconductor Design Equipment Semiconductor Mask/Reticle Manufacturing Equipment Semiconductor Wafer Manufacturing Equipment

Pick & Place Machine Longevity

Jun 4, 2018 | We have 2 Samsung SM482 P&P machines. One we have had for almost 3yrs and the other going on 2yrs. Echoing Spoiltforchoice comments it's critical to use the proper lubricants and cleaners and cleaning/replacing filters when needed. A dusty environment is not good. Make time and create a maintenance

JUKI vs UIC Pick N Place Machines

Mar 9, 2018 | /750. The only issue I am aware of is having to clean the laser head often. Heads run $1300 rebuilt which is one of the most expensive components.

Repairing Samsung SMxxx Feeders

Jan 5, 2018 | , but can be > replaced. If the feeders dont light up, maybe > you can try to see if the problem is the position > or the feeder, by switching its placement > position and see if it lights up again. The > contact for the electronic part also has to be > clean and maybe sprayed

Golden Finger contamination with Solder after reflow

Nov 14, 2017 | is too low, flux thins and leaks from the paste deposit and carries raw fine solder particles across the board. * If preheat ramp rate is too high, the flux boils and ejects raw solder from the paste deposit Snarky comment about cleaning Kapton tape adhesive reside: * Kapton tape that you buy

Mid Grad BRA Reword (20K to 50K)

Nov 13, 2017 | Hi all, I'm in the market for a BGA rework machine capable of handling a wide range of PCB's, anything from little 2"X2" board up to 15"X15" back-plane boards that are 0.100" thick. I would like to find a machine that can remove BGA's & QFN's, clean the pads and then replace the part. Any input

How to choose equipment for Selective Soldering ?

Oct 30, 2017 | come in for day shift and the pots are ready to go = big time saver. Maintenance is important. Keep them clean as flux tends to get all over the place. High activity flux for nozzles is needed. Tooling is important. In our case, probably 75% of builds need tooling. We build it in house as we have

PCB cleaning system

Jul 21, 2017 | The very best batch cleaner I have ever used, and I don’t mean by a small margin, was an Electrovet

Lead free selective solder

Jun 24, 2017 | preheat module but there is the cost factor with this. For lead free my company uses a ERSA Versaflow 3 machine and we have had great results with both no clean and water soluble fluxes. Another option is if you have a oven that you bake your boards in you can try to take a board directly from that oven

Conformal Coating Coupons

Apr 19, 2017 | critical to them. Else, do you have any obsolete stock you can put through the wash to clean off any residues and use?

Conformal coat material dispensed through epoxy needle?

Feb 6, 2017 | begin to build up, we peel the vinyl off and put a new piece on. To us, it's just not worth the time/effort spent cleaning. Other than that, replace syringes and needle tips when necessary. You'll be able to see when your flow rate is affected from clogging tips, if you have a lot of idle time while

Flux Residues on Wave Soldered PCBAs

Jul 29, 2016 | We do have a commen problem with flux residues after the wave soldering process, even after using correct wave soldering profiles recommended by the flux supplier, The following flux type is being used Alpha EF 2210 VOC Fre Bellcore No Clean water Based.Can somebody give us some hints what could

Having issues placing 0603 components on my used Juki 740...

Jul 11, 2016 | thanks for the replies so far. So far I have been relying on the board clamp on the machine that closes when the pwb is loaded. I have also been doing these tests with double sided tape on the pwb so i can clean them off easier afterwards. I have done 2 so far with paste on them, but still

Electrostatic Discharge due to Compressed Air

Jul 6, 2016 | for the question. We normally do not see or measure static charges in compressed air if it is clean. If it is dirty or contaminated, the contaminate can build up a charge. How to measure it is another issue. As the charge would be the result of contaminate movement in the compressed air, blowing the air against

Flux residues found after assembly process (Clean process)

Jan 8, 2016 | The most common method is a R.O.S.E tester. They have been around for 30 years and are an industry s

Oven Help

Dec 11, 2015 | I have an Conceptronics HVA102 that is displaying all "0s" in all zones. I tried a new mobo and power supply and it worked for a short time. However, after restart, the problem came back. I also tried reseating and cleaning all connectors and cards. CVD equipment does not stock special function

Halogen-free Solder Reflow Quality Issues

Nov 6, 2015 | on the upper end of the spectrum in terms of max temperature, and the leftover flux looked a little dark but once cleaned the joints looked superb. Due to an inability to really get outstanding visual results with the Kester halide-free product, and the fact that Henkel's is room temperature stable I think we

Panasonoc CM602-L Problem

Oct 22, 2015 | the time? 3. In side input check you still can see the door signal ON/OFF normally? 4. Can you swap the NFV2CF+NF0FCF board (CPU Box in AF) with other CM602? 5. Can you clear SRAM? Can you re-install MC system? 6. Please push/pull the head, cleaning all X and Y linear scale of all table. 6. I think you

Simple conformal coating machine

Sep 11, 2015 | to worry about cleaning the valve or replacing lines, you just swap the needle, or replace the syringe. FluidMove XP is not all that great, but honestly it gets the job done. Biggest hurdle encountered was finding a fast enough air-valve to control the flow. And it's really not that hard to figure out

Mydata Hydra tool reference marks error

Jun 15, 2015 | fallen in it and also checked the reference plate and gave it a clean. There appears to be no damage to the plate and the reference marks seem clear and defined to me even under a microscope. Mydata/Mycronic were saying I may need a new hydra ref plate, but there doesn't seem to be anything wrong

Dendritic Growth

Mar 23, 2015 | Dendritic growth is always a result of three combined factors: Conductive/corrosive residues Electrical current Moisture A wave solder process normally applies a higher volume of flux than a printed process. Flux however is not the only source. Flux, even weak low-solids "no-clean" (more

Questions you would ask if someone said they had a 3D printer for professional multi-layer PCBs?

Feb 25, 2015 | the assembly be reflowed using conventional processes? Will the PCB need special solders or treatments? Can the PCB be cleaned? Will the technology require special design considerations when laying out the PCB? Will it come with its own software or will it accept Gerber/ODB++ directly. Who is the target market?

PCB with stains bleach after flux aqueous wash

Feb 12, 2015 | liquid solder masks, you will often see it appear as white spots. If the solder mask is undercured, any cleaning step may strip off part of the green solder mask, exposing the white thickener powder (typical trade name is 'Cab-O-Sil"). Heat the white area with a heat gun. If the residue is the Cab

QUAD IVc Laser Alignment throubles

Feb 11, 2015 | the object beside de nozzle, Z rod reaches the limit of travel on the height. I already cleaned the lens according to the manual and have checked the coaxil cable (and connectors) from the sensor to the controller (pin by pin). I've swapped sensors and laser controller board but I have the same fault. I

PCB SHELF LIFE AFTER FIRST REFLOW

Feb 9, 2015 | the first side? This could degrade the protective coating. Do you wash the boards after assembling the first side? If you wash using alcohol or solvents, the coating could degrade... this would also happen when you clean misprints during the build process. How many heat cycles will this product see before

how to solder manganin 0.05mm manganin wire to a copper plate

Jan 29, 2015 | of the bigboy solder suppliers [eg, Superior, Indium, Alpha, etc] have products that will work * Choose a water soluble, rather than a low residue flux. Make sure you clean it well. Your flux supplier will have suggestions if you cannot use water. * If this is a cryogenic application, minimize the amount

My9 Optical Beam Splitter

Sep 15, 2014 | Hi guys, New to the forum. I always read and look around at used equipment but have never posted. Anyway, I operate a Mydata My9 at a small shop and have recently ran into a problem and wanted to get some good advice. An employee of mine cleaned the beam splitter glass used on the high res

MPM Accuflex fails to initialize powered rail

Jul 25, 2014 | We also had this problem and found similar results with the anti-backlash nuts binding. We went through the process of cleaning the lead screws and the nuts which resolved the problem for about 6 months only to have it return. We learned that the lead screws are Teflon coated and they should

MPM Accuflex fails to initialize powered rail

Jul 25, 2014 | We also had this problem and found similar results with the anti-backlash nuts binding. We went through the process of cleaning the lead screws and the nuts which resolved the problem for about 6 months only to have it return. We learned that the lead screws are Teflon coated and they should

too much foam in our Speedline TechnologiesELEOCTROVERT/Aquastorm 200

Jul 18, 2014 | massive foaming. Contact your flux supplier for a recommended temperature. In the meantime, I suggest a 50*C control point. Next, as boards are cleaned, it forms water soluble soaps in the wash solution. These soaps appear as foam. This foaming may be suppressed, but only in moderation. If the soap

Fuji IP-II Troubleshooting

Jul 10, 2014 | Ok so here is where I am with everything. I pulled the cylinder and cleaned it out. Didn't find anything out of the ordinary inside. I set everything back up and tested it. Still nothing. I went into the I/O map and tracked down that input, I then took a magnet and ran it across the sensor

Meridian 1020P servo wont start

Jul 9, 2014 | You have a rather old machine that you are running....now realizing this you need to check some things. 1. Clean the scales in the x and y direction. On some of the encoders there is an led to see if its reading correctly....Usually it turns green but if you move the gantry and it turns red you

Component Tinning Equipment Options (Automated preferred)

Jun 18, 2014 | Hi All, We leadform components for our assemblies in house and have been tinning the leads using a dip methood by hand into a solder pot. by just handling the components during the tinning and cleaning process we are at times damaging the parts/lead bends. We are considering the acquisition

BGA drop off from the boards

May 23, 2014 | the board with drop off BGA by using microscope. The BGA pad are all clean, and the solder and the BGA ball are both joint nicely (see attached picture). The reflow profile is within the solder paste's recomendation. There are 7 BGA, 6 of them are small pitch BGA (SRAM & FROM), 1 (droped one) is a

New facility flooring choices TILE, EPOXY, rubber tile, sheet, carpet

Apr 29, 2014 | as the need arises. Static dissipative carpet in the Management and Program areas closes the loop for us. I think the key feature of the flooring we chose is that it remains very clean looking, even after years of traffic and machinery going in and out of the building. So, IMHO, Fully Conductive Flooring

Soldering to a nickel plated battery terminal

Apr 22, 2014 | that stuff, just be sure that you clean all residues. Have you thought about conductive epoxy? * Master Bond masterbond.com * Chomerics chomerics.com * EpoTek epotek.com Some BATTERIES+ stores spot weld tabs to batteries. Maybe they'll spot weld whatever it is that you're trying to solder to the battery

Lead free designated soldering irons

Mar 25, 2014 | to use only designated lead free irons to solder lead free and if a leaded board needs rework you have to change a tip or use a lead designated iron. All tips that I have seen, are lead free. I realize it is important to use the correct solder, but as long as the tip is kept clean either by regular

Quad QSP-2 Wild Erratic Behavior of Gantries

Mar 6, 2014 | Does this happen with just 1 gantry? If so...I would think your encoder in that gantry/axis needs cleaned. I have seen digital i/o cards cause this issue. But usually you will notice this when opening and closing the doors. The head would sometimes 'runaway' because the motor signal isn

Mydata sod523 pickup problem

Mar 5, 2014 | goes in. Goal is to clean the inside of the Z tool holder all the way up to where the sensor is. Then re-grease the tool o-rings lightly before having the machine pick up the tool again. Another thing to check is to see if the spring action on your C14 tool is working. The shaft should move

Wave solder Products Dirty Boards

Feb 10, 2014 | I am having a problem producing clean boards when i run them through my new machine. Currently i use an Electrovert system that uses trays and we are trying to upgrade our equipment so I bought a SHEO 8250 and it is making the boards dirty and lots of bridging. I dip the boards in FLUX NC 264

Kester 985M - Will It Help?

Nov 23, 2013 | We installed a Soltec Delta 3 a few months ago and have been trying to run with a VOC free no clean. We're using SN100C in the pot. We are spraying the material and have top/bottom preheat. Evaporation of the water in the flux is a bit of a struggle when setting up new profiles but no matter

Effects of Silicone on Ionic Contamination Testing

Oct 22, 2013 | /creating ionic contamination to the assembly. 3. Mitigate those risks. This may be done through mandating use of nitrile gloves for handling, review and update of manual cleaning process, etc. 4. Present to your customer as "This is what we can do to meet your requirements." not "Can we do this

Ion Chromatography Testing Standard

Sep 26, 2013 | no clean process as benign. IPC-A-610 section 10.6.3 has a provision related to this type of residue. I need evidence for some of my customers that this isn't something of concern. Joe

Cleaning of misprints

Jul 29, 2013 | Is there any particular reason you're looking at getting a dedicated machine?! The first question

Defluxing Advanced Packages

Led tester