double sided pcb

"double sided pcb" search results in the Electronics Forums

12781 result s found for "double sided pcb" in the Electronics Forums

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Quad 4c not placing components

Sep 5, 2019 | Hello Bobpan, Thanks for the suggestions. Sorry I didn't reply yesterday as I'd gone home - I'm in the UK, so I'm guessing there's a time difference. Okay, I found the control to turn off the vacuum verify - it's SHIFT - SWITCH/VERIFY. Makes no difference though. Still hesitates over the PCB

How Quad Align works (Quad IV-c machine)

Aug 2, 2019 | align, because I plan to use some parts that require a fine-tuning in my next pcb. So, to try to figure out how it works, I got one of my 1206 pick-ups to make a few tests. As I understood, the QA data is included with the "ATTACH LAE?". Ok, then I set the 1206 resistor size: Length

What were your top go-to sources for electronics information and learning in 2018

Nov 6, 2018 | and trends. EPP EUROPE EPP EUROPE offers a wide variety of reporting about practice and application in electronics manufacturing. Emphasis is placed on SMT and PCB assembly, semiconductor back end and hybrid production as well as test and measurement systems. It is published in English and German. evertiq emerging in the SMT and advanced packaging industries. I-Connect007 I-Connect007's family of electronics packaging industry magazines serve the global electronics supply chain including printed circuit board (PCB), assembly, electronics manufacturing services (EMS) and PCB design professionals at companies providing engineering or manufacturing services to the electronics industry. U.S. Tech covers test and measurement, PCB design, SMT/contract manufacturing, components and distribution, semiconductors, SMT and assembly, and SMT production.

Conversion of gerber data into .lst, .aoi, .srf or .asc formats

Sep 3, 2017 | reference designators, theta rotation, part numbers, X/Y component pin geometries, values, tolerances, etc. This data is then used by Process Engineers or Test Engineers to program their SMT, Thru-hole Automatic Assembly Equipment, AOI and Test Equipment. ProntoGERBER-CONNECTION displays your PCB

Waves soldering: not enough solder remaining on pads

Jul 31, 2017 | adjusted so that there is only a minimal amount of back flow (most of the solder flow is towards the PCB). And we're still not getting enough solder deposited on pads - the solder fillet is clean but just very lean. Any further suggestions would be very appreciated!

New SMT line introduction

May 16, 2017 | everyone needs from the machine vendors before they leave? We have an acceptance PCB that we run down any new line which gives us a good idea if it's all set up OK. 8) Make sure you get internal sign off from the production team on everything otherwise you will get stuck in the middle, and make sure you

Lead trimming

Jul 19, 2016 | , Screen Printing, Soldering, Turnkey * Versatec Authorized manufacturer, re-manufacturer and service center of Contact Systems CS-400 Series Through Hole Cut & Clinch insertion machines and C3 and C5 First Generation Series SMT placement PCB assembly machines. Danbury, Connecticut, USA Manufacturer

through hole questions

Nov 19, 2014 | tool. but I don't think its been touched for 16 months now since we SMT'ed our parts. How many through hole components average per PCB (or panel)? 3-15 What method do you see as the preferred method for the future and why? For example, if lot sizes are decreasing will you see more potential for semi

Graphene To Generate Terahertz Laser

Nov 5, 2013 | to Gierz who performed the work with colleagues at the Central Laser Facility in Harwell, England, and the Max Planck Institute for Solid circuit board State Research in Stuttgart, Germany. "High-temperature superconductors professtional printed circuit board prototype manufacturer(

Reduce PCB pad area on fabricated boards

Oct 27, 2013 | Laser ablation * Photochemical (UV sources, e.g. Excimer) * Photothermal (IR sources, e.g. CO2)

Pick and place machine for small productions. Any suggestions?

Sep 18, 2013 | Hi all! after hours of manual hand soldering and after spending thousands of euros subcontracting PCB assembly, we have decided to buy a fully automated pick&place machine. Our main assembly requirements are 0805/0603 for passives and TQFP-64 0.5mm pitch for ICs. We have a very limited

Student Project Cern GBT Aggregator

Oct 18, 2012 | : The GBT (Gigabit Transceiver) will be implemented on a PCB (printed circuit board) similar to an AMC (Industriestandard) - (Advanced Mezzanine Card), which will be housed inside an ATCA Board (Advanced Telecommunications Computing Architecture Board). On the AMC will be a programmable FPGA (Prozessorchip

In search of knowledge

Oct 17, 2012 | 1) Is there something your design/pcb Engineer can do to lay the array out a little better for the wave (i.e. add substrates, board thickness)? 2)What do you mean by material movement? Single piece/continuous flow. 3) Shouldn't be too hard. You first need to determine what kind of equipment

MyData A12 tool tip damage

Jun 26, 2012 | -motor that rides on the Midas head were all suspect. It would cost us $ 14,000 (US dollars) to upgrade. The small X-motor is no longer available from MyData as it was discontinued from the manufacturer. In discussing the tool strikes, he told me that the machine starts a new PCB and grabs the A12 tool. Since

Use of Stored PCB

Mar 23, 2012 | > J-STD-003B prescribes test methods, defect > definitions and illustrations for assessing t

FR-4 PCB Material Recycling?

Feb 20, 2012 | Services, Recycling, Electronic boards * American Scrapmetal; 7120 Rufe Snow Dr, Suite 106-184, For

Juki vibratory stick feeders

Oct 26, 2011 | =""_fclark@lewis- > clark.com_/a_ * PCB Assembly Equipment, LLC; _a > class=roll > href=""

BGA Placement Process

Mar 26, 2010 | do not use any form of solder paste to assist in the connection between the solder sphere and the PCB pad. Is this something that you think would be important for the replacement process. This is currently a tin leaded BGA and thus I did not think of it being an issue. I was not aware that I would

defects in pcb manufacturing

Nov 3, 2009 | Solder Mask Adhesion Pull Test Tape List IPC-TM-650 Test Method, Adhesion, Solder Resist (

QFN Thermal pad voiding

Jun 3, 2009 | it is. Still > 65 % solder fill in the vias and > 50% is req. The pcb is 1.6 mm thick. In opposite order, Mika

0402 tombstoning and dewetting on QFP256 trade-off

Mar 5, 2009 | Hello to all. for certain time, we have been struggling with some issues on a PCB where have tombstoning on 0402 components (due to pad design) and dewetting in qfp256 0.5 mil pitch (discussed on another threads on this forum) component, we have proven that wetting is improved on this component

confomal coating help /Contract coater (for an Outdoor LED PCB)

Feb 2, 2009 | Services, Conformal coating contractor: * Advanced Coating; 10723 Edison Ct, Rancho Cucamonga, CA 9


Aug 26, 2008 | been happy with their product and would recommend it to anyone. I don't have any experience with other AOI mfg., but YesTech's tech support has been outstanding. When you do demo a unit, "break" a board. Meaning, put defects into the pcb to test whether the AOI will catch it or not (i.e. solder

Scrapping Electronic PCB's

Jul 26, 2008 | Services, Recycling, Electronic boards * American Scrapmetal; 7120 Rufe Snow Dr, Suite 106-184, For

ultra low cost pick and place?

May 13, 2008 | Yes, this is a good point and really only time will tell just how reliable such a machine becomes. What I'm aiming for is to simplify and reduce the number of sub-assemblies. For example we are building the camera/vision processor and lighting into one small block on two PCB's, the top and bottom

Does anyone remember the takt time formula for the reflow oven

Mar 13, 2008 | ) has to be "wet" (fully loaded), and you'll have to assume that boards are coming into your oven at a consistent rate, and they're being spaced apart consistently. Now, you've got your "oven takt time" (ie a PCB will come out every X number of minutes or seconds)... So, for example, say your oven

Low volume prototyping

Jul 13, 2007 | shim stock, and etch in a spray etcher like it was a PCB. I am doing reflow in a $50 toaster oven with a thermocouple controller. These results are less than spectacular, but the boards are usable. I'm still figuring out how to tweak the apertures in the stencil to get just the right amount

MyData Missing Placements

Jun 28, 2007 | higher and parts seem to surf up onto the jaws. Any lower and the tool head ends up getting chewed on. Also, a custom plate is being used that provides complete support for the PCB. (No bouncing) I'm losing my mind. I'll send somebody a frozen steak assortment (Continental U.S.) if they can provide

What to buy

Mar 16, 2007 | supplying pick and place machines to the PCB assembly industry. 10, not 100, not 1,000. There are really only about 10. Then it doesn't take long to whittle that list down to 5 or so based on that machine mfr�s core competencies, specifications or their machines and price point. Printers, heck you�ve got

Chip capacitor size - Fuji CP6

Aug 19, 2006 | the height of 0.7 mm. Now, during the placement cycle the nozzle will stop some tenth's of a mm above the pcb and cause the comp. to drop on the board. You can imagine the rest... This is my question to You since our local Fuji guys fail to come up with an adequate answer: is it possible to set the comp

GSM2 Errors

Jul 13, 2006 | the new pattern in Dry cycle!!! > Run/Start. The reason for bypassing the fiducial check is that you don't need a pcb in the machine for this and it will not call for the fids. If the machine runs fine > stop > edit pattern > choose spindle # 2 > save > reload > run. Now do this on every spindle

lead free platings and tin lead

Aug 31, 2004 | refining, lead as an impurity in a solder joint migrates to the last area of the joint to cool. This occurs under the middle of the component lead at the solder joint-PCB interface. * When this occurs, the joint forms pockets and the grain structure is disturbed. These Pb-rich regions are lower


May 13, 2004 | 2mm > to the left as well? how is the machine calculate > for placements using 2 diagonal fiducials? Vincent, Rob was right.Your PCb cad data will have the fiducials already in the file.If you use FUjicam or Circuit cam for machine programming and you work w ASCII data file to begin with

BGA and QFP orientation in trays for pick and place

Feb 6, 2004 | by that particular Manufacturer, or obtain a copy of ANSI/EIA-481-C for the full detailed explaination. If in fact your real underlying question is what should be the correct normal orientation (zero degrees of rotation) of a BGA or QFP in a PCB Design, then that question is currently open for debate

Lead free BGA's & std SnPb paste

Oct 30, 2003 | are high enough to actually get the ball to melt and recommend it's not below 225 deg C. This however will actually push you into going out with the spec's of the rest of the components on the PCB, I would suspect, as most of the components will be capped at 225 deg C due to IPC MSD limits, some

Paste in hole

Sep 4, 2003 | of the through-hole. To avoid this problem, component leads should not protrude more than 60 mils from the bottom of the PCB. The leads should also be rounded. Rounded leads minimize solder paste "push through." hope this helps.

Flux residue?

Apr 30, 2003 | problem with many polypropylene machines). You may also want to try a different wash chemical. New wash chemicals utilize a saponifier / aqueous-solvent combination. They rely less on saponification and generally work better on �weaker� machines. Chemicals I would recommend are: PCB-Wash (ours)

Cleaning after rework, no clean flux

Feb 26, 2003 | converts flux to soap). Although saponifiers are the most common aqueous-based solutions, they require a lot of mechanical energy (more common in spray-in-air systems). De-fluxing chemicals that are effective in an ultrasonic cleaner are: Aqueous Chemicals: Aqueous Technologies: PCB-Wash

Cleanliness test

Jan 2, 2003 | : 7.28 x 6.96mm (0.287� x 0.274�), ball size: 0.35mm (0.014�). Here is my dilemma� I am familiar with 2 methods of PCB assembly cleanliness evaluation. � Ion Chromatography, (per IPC-TM-650, method 2.3.28) � Solvent Extraction, �ROSE� test (Resistivity of Solvent Extract) (�Zero Ion� or �Omega

UltraSonic cleaning machine

Sep 25, 2002 | Sonic and others have revealed that the two technologies are now very compatible for many PCB cleaning applications. For most, ultrasonic technology is a mysterious science. Because the cleaning activity (cavitation) is microscopic, it is difficult to discern one system from another. Simply put if an ultrasonic supplier is expert in PCB applications or just supplying generic ultrasonic equipment. If cleaning tooling alone, high wattage systems may have an advantage (strong brush with lots of force). Unfortunately, if misprinted PCBs are to be cleaned in the same machine, the excessive power wattage of ultrasonic generator / total liters (gallons) of cleaning solution in bath). In general, the lower the power required to clean effectively, the better. �the ultrasonic wash cycle should be less than 10 minutes References: 1. Robins, M., �Solutions for PCB Cleaning,� Electronic Packaging and Production

Where do I Start?

Sep 23, 2002 | might require. They gave me advice like 'look at your worst-case PCB and size the equipment for that, not the average req'ts', or 'you build RF - that generally requires a greater than average number of feeders' or 'If you buy used equipment from the OEM rather than an equipment broker, you may get

50 PPM

Aug 21, 2002 | , the root cause of defects must be attributable to the prior processes. Second- What are your defined attributes to calculate PPM? Do you include: quantity of assemblies produced x((total component count + total placements (components - PCB) + total terminations)/ 1,000,000 ? My observation regarding 50

Downtime Calculation

Aug 18, 2002 | a reel. The important thing is to keep the machine with the lowest tact time running as much as possible. But again this really depends of the company's ability to sell everything produced. This leads us to your calculations again. You assume in your reply that if you can produce 130 PCB

adhesive on pads

Apr 1, 2002 | will produce a finished assembly with low risk for electrochemical failure. Halide residues are usually the root cause of dendritic growth. Halide residue may be from fluxes in the assembly operation or from HASL fluxes used in PCB fabrication. You should investigate both areas, bare board and assembly

Board Cleaning

Dec 5, 2001 | =roll href="" target="_blank"> Kyzen 5020 PCB-Wash Hydrex DX

PCB\PWB Silkscreen Removal

Nov 7, 2001 | Here ya go ... * K & F Electronics, 33041 Groesbeck Hwy, Fraser, MI, 48026-1514, 1-810-294-8720,

Solder paste normalisation period

Aug 17, 2001 | onto the PCB and got them reflowed, 10 out of 10 gave me a good wetting/solderability. So, I said " win". But I've insisted them to bake the board prior using it. since they came in a loose form ( you dont want to know details..). My Boss said,.. No Danial, you gotta be crazy, don't you know

Gold coated spring contacts

May 30, 2001 | Redbone fan [dang Blues er so cold nosed, anywho], I never could get a fix on what he was mumbling about. Some of which may help explain why that company is out-of-business. Consider this: * Many fabs publish on-line "PCB Fabrication Guidelines". Do a net search, download some, and use the portions

Desiccants and pcb finish degradation?

May 21, 2001 | I said: "Our electronic circuit board fabricators seal the boards in moisture barrier bags [MBB]. W

AOI systems

Mar 30, 2001 | We are already using ICT on the PCB, which should catch most missing components, also components installed backwards, or the wrong value(to a point - we do RF so we have lots of very small value caps and inductors which can't be measured), and in some cases, faulty components. To enhance the yield

 Reflow System

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