Order by: Relevancy | Date
Jun 11, 2019 | Kolb Stencil washer Hi, Is anyone out there using a Kolb stencil washer with N7 cleaner ? If so, could you please share your opinion on performance and consumption ? Thanks !
Apr 26, 2019 | We solved the issue. A stencil must be clamped in the machine to allow the command. The stencil serves to hold the board level, while the pins are set. The machine is smarter than us.... :/
Mar 25, 2019 | Stencil gerber editing software. Does anyone know of a relatively inexpensive and easy to use program to edit stencil gerbers? I have been using CAMtastic 2000 designers edition for years and it worked perfectly however I can not get it to run on win 10. Thank you
Feb 27, 2019 | HI, we're starting to look into 3D SPI and although we always have stencil data we hardly ever get CAD. Will that prove a big problem or in your experience is it just load the stencil data and compare deposits to expected? Thanks, Rob.
Nov 20, 2018 | Island SMT showing in stock. http://islandsmt.com/product/front-and-back-stencil-sensor
Oct 9, 2018 | Quad MV-100 Stencil parts Does anyone know of a place to get parts or repair for the Quad MV-100 Stencil printer.
Aug 30, 2018 | Stencil and paste used for .4mm pitch csp component ball size .3mm? I don't know your board, but for this specific part: 10mil round aperture on a 3.5mil stencil with type 4 paste wold be ideal
Aug 16, 2018 | Stencil life Never heard of any traceability requirements for stencil cycles. The SPI machine should be the judge of how your print process is performing.
Aug 16, 2018 | Stencil life Hey man, can you please suggest what you do for traceability system to count cycles of the stencil. Is there any special setup for that or just a Excel sheet with formulas.?
Aug 14, 2018 | Hello, Mr. Evtimov is correct. Always use data from stencil. All new SPI machines are pretty easy to operate with. You load stencil data, add you CAD data and then adjust your tolerances accordingly.
Jun 7, 2018 | Stencil life Hello, the colleagues are all right. What I did in addition to show customers and quality that we either need or dont need a stencil: 1. Made a procedure - in there i defined 50 000 cycles and then the stencil has to be checked by me. In the checks if you have dents on the image, rust, signs of delamination from frame (if you use frames). I also got a special tool to measure the tension of the stencil to see if it is ok. 2. Made a special check list in where i check all that, input the tension results from the 4 corners and the middle 3. Get information from SPI (cpk, trends, defects). If spi
May 30, 2018 | Stencil deformation patterns Thank you all guys. I appreciate all your help. I am running a new series of tests to reducy this in new projects. There is an equipment to messure stencils deformation pressure, but we happen to not have the software. Do you know if there is any standard for it?
May 22, 2018 | Stencil deformation patterns This is caused by usage. Excessive squeegee pressure can make it worse over time.It will become more pronounced on thinner stencils. Unless it is causing printing defects, don't worry about it in my opinion.
May 21, 2018 | Stencil deformation patterns Hi experts, I would like to ask to the forum if you could describe what could be the causes for stencil deformations. We mainly see a wave like pattern.
Apr 20, 2018 | Stencil life Show that it is cheaper to replace than to make bad boards that need rework. Surely you can get QC to complain about the boards pasted with that stencil.
Apr 9, 2018 | Stencil and PCB Coplanarity measurement The easiest way to do without special tools is to use level. Check machine co-planarity on the conveyor rails in both directions(you can do that with rails down or rails up or both). Then check co-planarity on the stencil. If the level shows the same on both, you should be fine.
Apr 6, 2018 | Stencil and PCB Coplanarity measurement Hi Experts, I am interested in having a tool or process to measure coplanarity between the PCB pushed-up in the printing process and the Stencil. Therefore having a way to calibrate them.
Mar 26, 2018 | I realize that I wrote wrong. Sry The stencil of 0,1mm of thickness is printing 45% more volume. I know this becouse the SPI is setup with the stencil gerbers and the messurements have a median of 145% of volume. what do you mean with excesive solder mask?
Feb 28, 2018 | Stencil-less printing? With saving time and space. With having the possibility to change any aperture at any time. With having the chance to apply different deposits on the same assembly or the same part. A stencil printer is not for free as well and it needs consumables too.
Feb 16, 2018 | SMT Stencil Design Thanks Rob, You are right. unique for us here might be common some where else. Will work more closely with our solder paste and stencil suppliers.. :)
Feb 15, 2018 | SMT Stencil Design IPC-7525A - Stencil Design Guidelines http://www.ipc.org/TOC/IPC-7525A.pdf
Feb 15, 2018 | SMT Stencil Design Hi All, Please help me in suggesting a technical paper or document. Which can help to design a good smt stencil to optimize smt solder paste printing at first time. Regards, Ameen
Nov 1, 2017 | I'm thinkin you can buy a lot of stencils for 200K. If you are worried about floor space, buy frameless, or space saver stencils. Will not jet WS paste.
Jun 12, 2017 | MC110 High-Accuracy Manual Stencil Printer it looks like it has something like rising table to push board against stencil...
Mar 2, 2017 | Manual stencil printers I am looking at purchasing a larger manual stencil printer. I have several 29"X29" frames so I would like to get a machine that is compatible. Does anyone have any experience with Manncorps MC110 or similar? Appreciate any recommendations. Thanks.
Feb 22, 2017 | Cleaning PCB After Soldering - How? > Which is the best way to clean the PCB after > soldering? Is it good enough with IPA > (isopropyl) or with the Flux Remover > spray? However, we use a lead free solder wire > (3,5% flux inside the core) and after the > soldering its a visible wet and surface gets > ; clean but it leaves sticky on it. But same things > occurs when cleaning with IPA.The PCB material is > FR 4. I hope we get a productive discussion on > this and will get the best solution? > Which is the best way to clean the PCB after > soldering? Is it good enough with IPA >
Jan 25, 2017 | Hi, I used black marker before and it will works for a while, but it is not a permanent solution. Ask stencil house what kind of material and process they use to apply the black material. I think this operation might be done manually after the stencil is cut(just like painting it with a brush).
Jul 7, 2016 | If the offsets are the same for every board and stencil you checked - You should calibrate this machine. Usually you should have a calibration stencil and board to do that.
Jun 2, 2016 | i have tried to design the stencil as attached, but the void is more than 35%. do you have any idea what is the ideal diameter for the stencil aperture for the solder to spread and the flux to be released out of the component simultaneously. thanks alot.
Apr 28, 2016 | Automated Stencil Wipe Would you use dry wipe or wet wipe procedure for your Stencil Printing process? Whichever you use would you please let me know the benefits of it? Thank you in advance.
Jun 2, 2015 | Well, I'm speaking in general Our stencil guy insists on those part edits at 100% He's one of the loudest voices calling for me to "Stop slamming the parts into the PCB" All my research so far says we need to be looking at the stencil apertures.
Feb 12, 2015 | stencil/printing machines for solder paste Just my opinion: Stencil printers: 1. DEK 2. MPM 3. ..... Solder paste: 1. AIM 2. Alpha 3. Indium .....Kester
Feb 10, 2015 | stencil/printing machines for solder paste low volume high mix, looking for advice on what i should get, a stencil machine or a jet printer for smt solder paste. used/new and companies i should look into?
Nov 20, 2014 | stencil Of course I forgot to mention that the number will vary based on the type and thickness of stencil that you're using, type of squeegees, board support, print pressure, and speed.
Aug 27, 2014 | Step Stencils I always put the step on the squeegee side. You'll get some "shadowing" effect on any parts in close proximity to the stepped up region. It should be manageable with proper board / stencil design.
Jul 29, 2014 | Step Stencils I think you need step on the bottom side of the stencil (undercutting) only to compensate elevations on the top side of the PCB, such as labels.
May 9, 2014 | REduction of center pad is the key as well as the stencil thickness. Having too big opening on your stencil will sometimes lift the part from the pads. Always try to make windowpane and shoot for about 60% of the thermal pad to be covered as start point(as suggested in the earlier post).
May 6, 2014 | 0201 (0603) stencil spec Hi all, Can anyone share the necessary info for printing 0201's? stencil Thickness, grade of steel, 1:1 etc Thanks in advance, AJ
Apr 14, 2014 | EMC Spirit II stencil cleaner Does anyone have an EMC Spirit II stencil cleaner and could provide insight on it? We were thinking of purchasing a used one. Thanks!
Mar 6, 2014 | Thank you very much, davef. After much searching, I managed to find Stencils Unlimited (Oregon) and Photo Stencils (Colorado), both of which appear on your thoughtful list. I really appreciate your other contributions and will be contacting them in short order. Your help is greatly appreciated
Dec 30, 2013 | I would also check the stencil thickness. You don't want 7mil stencil for 0402 components.
May 27, 2013 | We have an LED 0603 package, We are using stencil of 5 Mil, Before Reflow placement is perfact but after reflow it tis found that there is more than 30% LED are tilt. Can the speed of Fan in Reflow can help or I have to reduce the PAD opening in Stencil
Mar 7, 2013 | Hi Chris, Get the stencil repair kit from DEK. P/N: 430886. It comes with tools and isntructions how to remove the stencil from frame. Regards Marcin
Feb 19, 2013 | I appreciate the help, I tried a small amount of force, but I didn't want to trash the stencil, I got hold of the where we purchased it and they are going to repair, if they trash the stencil they will cut us a new one.
Feb 12, 2013 | Small apperture release from stencil My appertures are 10mil diameter. Using electroformed stencil is probably be my next step. Thank you!
Feb 6, 2013 | Foil stencil storage rack That is a good idea, I was able to find the big file folder before, I can't even find those now. I thought I saw one that had little sliders with hooks to hang the stencil from. Thanks for the info.
Feb 5, 2013 | Foil stencil storage rack I am looking for a nice storage rack for foil type stencils, not the frame type. Some thing compact yet easy to work with. Any directions/advice. Thanks in advance.
Jan 8, 2013 | Stencil cleaner Hello, I'm looking to buy the stencil cleaner. Could you please advise what sort of options, parameters etc I should be focusing on? Thanks Marcin
Jul 12, 2012 | STENCIL RACK I have AGI stencil racks and a couple of bliss, I'm not sure about the AGI price but decent quality.
Jul 9, 2012 | fids. The pads of the pcb must "look" as similar to the apertures in the stencil as possible. If the pcb pads are not similar to the apertures, then their centroids will be shifted which WILL shift the position of the stencil on the pcb. 2 other things: Place the pcb on a workbench. Place the stencil on top of the pcb. Manually align the stencil to the pcb. Is it possible to get all 9 sets of qfn apertures positioned on top of the 9 sets of qfn pads? If yes, then your stencil is cut correctly relative to the pcb. If no, then you'll never get a good print. Side note: I realize that manually aligning a 31" pcb/stencil will be a challenge. If your screen printer allows, increase the number of fids used for aligning the stencil to the pcb....for example, instead of using 2 diaganol fids, use 4 fids in each of the corners. By increasing the number of fids used for alignment, the error
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