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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Isolating QFN Ground

Mar 15, 2013 | We avoid kapton in this situation due to the thickness. 1 mil additional thickness can equal up to a 20% increase in paste volume at adjacent pads if you are using a 5 mil stencil. But then again, that is not always bad. But must be taken into consideration at the printing of the solder paste

Vectorguard frame failure.

Feb 19, 2013 | Push the pedal and help yourself with a screwdriver to take the stencil out. Once you do that you can see clearly which side is not opening and closing. Than you just fix that side. Your instructions on how to do that should be with your spare hoses.

Small apperture release from stencil

Feb 19, 2013 | > No Pete, > > problems start with very first > print. OK, So what is the flux

Small apperture release from stencil

Feb 18, 2013 | What type of flux material does your solder paste have? I have seen difficulties when attempting to

Small apperture release from stencil

Feb 15, 2013 | What foil thickness? Type 3 or 4 paste? Have you checked your area ratio(s)? You could overprint

Gerber file of Heraeus Benchmarker II

Feb 7, 2013 | Gerber Stencil File for Heraeus Benchmarker II

Gerber file of Heraeus Benchmarker II

Feb 7, 2013 | Thanks a lot for detailed information. I will check whether I could get required boards and gerber files from them. I have the BenchMarker II board, I only need top layer (stencil) gerber file for the purpose of verifying repeatability of SPI machine.

Companies for SMT Fixtures

Feb 1, 2013 | Mauricio, Contact Steve@usastencils.com - He'll make you a free first article to try out USA STENCILS INC design and manufacture in house so it'll be very fast.

MPM Accuflex Calibration

Jan 4, 2013 | We've got used MPM Accuflex that we recently purchased and it seems like the stencil to board offsets need to be calibrated. After looking into the manual it looks like it requires a fixture or calibration jig, can anyone confirm this? Does anyone know the ins and outs of this calibration?

Line configuration

Dec 27, 2012 | SJ Inno Tech have a few models of screen printers with two stencils and two conveyors, for example, HP-350MD.

solder paste stencil life

Dec 17, 2012 | I would scrap it. As you said part of it is going to be old paste. All manufacturers don't recommend

Solder Paste layer question

Dec 2, 2012 | Where might I obtain this software that performs the aspect ratio for stencils, I could use Excel but why reinvent the wheel if there's something better

Ultrasonics Stencil Cleaner-CH-2408

Nov 12, 2012 | Hello, We are going through auditing and the auditor requests that we need to have some type of d

DEK screen printers

Sep 19, 2012 | When possible we put 2 images on a stencil to save money and storage space. I was told the DEK can not use offset images, Is this true?

Problems with diode during wave soldering

Sep 14, 2012 | Hi Melissa, thanks for you reply... I'll increase the placement force on this component so that it touchs better the board pad. Maybe it couldnt help due to stencil aperture. Maybe I'll have to change it. If you have more ideas, please share with me. Thanks.

Solder Paste Controls

Aug 3, 2012 | I agree with Ka. I can't think of a solder paste supplier that doesn't tell you to let your paste come to room temperature before putting the paste on the stencil.

STENCIL RACK

Jul 5, 2012 | you can contact me at rob@stentech.com I will have

STENCIL RACK

Jul 2, 2012 | I like the ones from Bliss.

QFN aligment issues

Jun 29, 2012 | I guess I would atribute it to either board stretch/warpage or someone messed up, whether it be the gerbers aren't quite right or the stencil wasn't cut exaclty as the checkplot was laid out.

Mydata MY500

Jun 14, 2012 | If you cannot put paste down with a stencil, have exhausted all other avenues on putting paste down and the MY500 is the only machine that can put the paste where you want it... Buy it.

Assemby of flexible printed circuits

May 17, 2012 | These notes are from ~2005-6. I remember pictures of the pallets and the reliefs on the stencil. Bob may still have his presentation online. Check his site.

Auto stencil printer or AOI

May 12, 2012 | Hi thanks for your advice. Between, i do have quite a bit of THT PCBAs. How do you guys improve the

Setting limits in Solder Paste Inspection

Apr 21, 2012 | to the stencil thickness (ie: for 100um stencil thickness i use lower limit of 70um and an upper limit of 170um). I use these limits on the whole stencil, for all the apertures. I only ise different USL and LSL for aperture groups in case of STEP UP/DOWN stencils. 3. on SPI program (particularly Koh Young

solder paste control

Mar 14, 2012 | You're not clear if you intend to reclaim and re-use the paste from the stencil or not. If not, then you should go to cartridges with an air gun or modify a caulking gun for dispensing paste from cartridges. The paste will last a long time.

SMT Stencil Printer Recommendations

Feb 22, 2012 | I Have quite a few used printers that are in excellent shape. I will e-mail you the details if you a

screen thickness

Jan 27, 2012 | We're in the high rel market and use a lot of 5 mil stencils. They give plenty of paste to meet IPC class 3 and survive over 1000 cycles of -40/+125C thermal cycle testing.

Paste Printers

Sep 24, 2011 | I assume you mean dispensers? They are slow and limited on how fine they can go. Paste is much more expensive. The money you save in stencils will be eaten up by other consumable items on the dispenser. They are flexible but how flexible do you need?

Paste Printers

Sep 1, 2011 | Looking for any feedback from those of you who have had any experience working with paste printers. How well do they work? Can we really get away from stencils? How do they handle fine pitch parts?

Solder Ball issue

Aug 22, 2011 | This problem means that you have too much paste. I would design a new stencil with reduced apertures. Emil

solder paste

Jul 29, 2011 | At a previous location we used the Semco cartridges. Occasionally the operator would have to scrape down the stencil and knead the paste back in. That would keep the paste on the edges from drying out. It was just standard procedure.

Nano ProTek Coating

Jul 21, 2011 | So far after ~1500 units printed with the stencil treated once with Rain-X, no issues were detected with solder joints. The only difference is no more solder bridges on fine pitch with .010" openings. The print is picture perfect on all pads, nice and even, flat across the top.

Stenciless Solder Print

Jul 11, 2011 | Long lead times was a slight exaggeration we wait approx 3 days for a stencil, although we can purchase them next day at a much higher cost. But when you are working to tight prdcution schedules this can prove costly.

Stenciless Solder Print

Jul 7, 2011 | I don't understand the long lead times comment. You should be able to get stencils next day.

Screen Printer Adapters

Jun 30, 2011 | I've been using a DEK Vectorguard frame for a couple months now and like it a lot. It uses air to clamp/unclamp the foil and both DEK Vectorguard and Alpha Metals Tetrabond foils fit the frame. Just about any decent stencil supplier sells Vectorguard foils.

Screen Printer Adapters

Jun 29, 2011 | These have been around for many years from a variety of manufactures. They work well and save a lot of space and will save some money on the stencils.

BGA connector

Jun 28, 2011 | If you have room, and the aperture size will allow for it, try a 5 mil overall stencil thickness with a 1 mil step-up in the area of the BGA connector.

patchwork stencil

Jun 23, 2011 | That is a very interesting concept. It sounds very time sensitive and would require some specialize

Solder balls on Ceramic

Mar 28, 2011 | Graham, good idea about reflowing first. I'll try this out. Our product is Ceramic, not PCB. I'll check the reflow as you say, though I have trialed various shapes and I am in contact with stencil manufacturer regarding aperture sizing. Thanks.

Stencil Washer Waste Disposal

Mar 22, 2011 | We use an evaporation system to eliminate the need to dispose of any wastewater, you may want to loo

MPM AP 24X

Mar 8, 2011 | Not sure what you mean. I have never heard of the stencil frame guides being out of square.

PASTE DRYING OUT ON STENCIL

Feb 10, 2011 | Some solder paste formulations can be frozen with no effect. Other formulations ... not so much.

solder paste printing

Jan 28, 2011 | Milara has a combined Stencil printer + jet Printing ??? Print and then jet print areas not printed or top up prints.

BGA REFLOW

Jan 12, 2011 | Do you think it is because of too much solder. we have 5thou stencil and no reduction in aperture. Please reply

Changing Ni/Au finish to HASL lead free

Dec 21, 2010 | 0.5 and 0.4 mm pitch, we think we could get problems with the solderpaste stencil. Also some board have keypads and then we have do do partial gold and I think that will not reduce the costs

Best way to ensure max solder load on SOIC w Thermal Pad

Nov 9, 2010 | Stencils are 5mils thickness, SS material. Printer is Accela.

Installation SMT SL2220 Printer

Oct 13, 2010 | Hi All Is here any1 can tell me how to get the installation guideline of Semi-Auto Stencil Printer,SMT brand SL 2220? Thanks in advance.

Solder Paste Type for QFN Printing

Aug 25, 2010 | I am printing solder paste directly onto a QFN device. Any recommendations on the type of solder paste to use? Namely I am concerned about getting a good release from the stencil. Thanks

Fiducial Recognition

Aug 18, 2010 | Pads typically have paste on them. Unless you have some parts that arnt placed and you can wipe off the paste or tape off the holes in the stencil. Not a good option.

super fine pitch paste & dispensing questions

Aug 16, 2010 | i would like to request some advice on manually dispensing paste for super fine pitch components. first some background. i am a small design house and specialize in sub-miniature prototypes for avionics. so far, i have mostly used stainless steel stencils (0.07mm) to deposit paste onto my proto boards. i have been using pretty standard paste (kester R276) and that all works fine. the problem with the stencils is that i sometimes have to do one-off designs and would like to avoid the cost for the stencil. in addition to the cost issues for stencils, i would like to venture into the world ob

Tombstoneing LEDs

Aug 5, 2010 | I am havein a lot of trouble with KINGBRIGHT LEDs tombstoning in the reflow oven. It is a PLCC2 package. The stencil apatures are home plated. Can anyone help me

Defluxing Advanced Packages

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