Electronics Manufacturing Forum Printed circuit board assembly, surface mount technology and electronics manufacturing forum discussions from Thu, 25 May 2017 22:08:17 GMT MAX5900NNEUT Hot Swap Controllers question Hello all, unsure if this is a good place to discuss this or not, but I can't find many Geiger counter forums. I recently got myself a MAX5900NNEUT as the datasheet of <a class=roll href="," target="_blank">, </a>and while I want to get it professionally calibrated it's a bit expensive at this time (a tad over $100, just $35 less than I paid not including shipping). Anyways, I have heard that the test source is either supposed to measure at 2 exactly, or between two and 3, however this one reads up to 4 easily, and can even max out the meter (all on the 10x range btw) if I position it right. Now, if anything it should read lower due to the half life of depleted uranium, no? Just wondering if I should "calibrate" it so that it reads roughly 2 or so, or if it might be fine, and they used the alternative to depleted uranium and somehow it has gained radioactivity? Anyways, just hoping for it to be roughly accurate till I have the spare cash to get it calibrated. It is understandable that it is out of cal though, since the last calibration was in 1984. Can anyone help me ? I am very puzzled about this question. Thu, 25 May 2017 02:18:01 GMT BOM Connector Software usage We want to make use of BOM Connector software from Router Solutions. Does your company work with this software? Please let me know how does this software works for your company. Is it a big time saver compared to your other system you worked with to make a quotation for a PCB assembly. Any information is welcome. Wed, 24 May 2017 11:22:24 GMT Mirtec AOI Wed, 24 May 2017 09:16:01 GMT First time Pick and Place Machine Hey all, We are a small electronics manufacturing company who has been using the solder reflow process for years, but we have been hand placing components. We only run the system 2-3 days per week. I have been looking at buying a used pick and place machine and it looks like the Philips Assembleon is very common. I would not be interested in paying some expensive technician to work on this, I would prefer to do everything myself. I have a number of CNC machines that I have bought and built, so I can do a fair bit myself. I was wondering what suggestions all you experienced P&P people would have for buying a machine, as well as which one you would recommend. I am not too concerned about speed. More concerned about inexpensive. Thanks, Rick Wed, 24 May 2017 07:27:06 GMT Waves soldering: not enough solder remaining on pads Hi all, We run an old Seho 1135C wave solder with a 63/37 pot at 250°C. It has been running well for a couple of years but we have noticed lately that all of the larger pads (terminal blocks, transformers, etc.) require additional solder to be applied by hand. I was not made aware of the extent of the issue until recently and upon closer inspection I feel that there is not enough solder applied to any of the pads. I did some observation of the wave soldering today and tried a few adjustments (i.e. conveyor speed, preheater temps) but to no avail. We are using the delta wave only and are spraying flux by hand before loading the pallet into the machine. Please see the attached photos (and please excuse my poor photography). The solder fillet does envelop the entire component pin and pad, but it tends to not want to go all the way to the edge of the pad. These are single sided PCBs with solder mask and HASL finish. Next time we run the machine (it only gets used around once a fortnight) I will run a profiler through, as I suspect that the preheaters are not reaching the required temperature (despite what it says on the controller). Does anybody have any other suggestions as to the cause? Thanks in advance! Tue, 23 May 2017 03:51:41 GMT how to learn PCB design Dears, I want to learn PCB design , is there anyone to give suggestions that how to start , and what need to learn about frist ? Best regards Tue, 23 May 2017 03:34:13 GMT High Volume PCB Rework in INDIA, CHINA? Can anyone recommend a quality PCB rework shop in either China or India? Mon, 22 May 2017 02:24:14 GMT Who are the top PCB Suppliers in China? I'm am curious if anyone here has any experience with ICAPE? Also who are the top companies in china that supply PCB's? Mon, 22 May 2017 02:14:06 GMT Transparent PCB Hello guys, Dose anyone know flex transparent PCB manufactory? Best in Asia Thanks for your help! James Mon, 22 May 2017 01:36:38 GMT Training Course Please suggest some extra course that can catalyst career in PCB assembling and manufacturing field. Sun, 21 May 2017 23:19:32 GMT Waves oldering: not enough solder remaining on pads Sun, 21 May 2017 23:16:50 GMT Not enough solder remaining on pads Sun, 21 May 2017 23:16:31 GMT Who ever seen the PCB rack (Magazine) cleaning machine ? I have a problem with some particle, dust and solder paste contaminate on PCB rack and need to clean up once a week by manual. Now looking for the equipment to do Inline cleaning with water jet & Hot air Dry concept. Not too big machine and concept like automatic car washing. If any one have other solution please help to share Sat, 20 May 2017 07:19:57 GMT wire harness strength We are soldering wire 26AWG to jack socket. However after went through washing, baking, coating, curing processes the wire breaks (at joining point with jack socket) during wire dressing. We have tried to increase and decrease the solder amount but rejects still happened. pull test of wire and jack socket is 40++ N. I found that the break wire has exposed copper on wire strands. what will be the possible root cause and what can I do to increase the wire strength? Fri, 19 May 2017 10:41:50 GMT Chip Component Stacking Hi, We have recently been tasked with producing a PCB assembly that requires a chip resistor to be stacked on top of a chip capacitor (both are 0603 package size). This becoming a more common practice, I was wondering if anyone has been successful in doing this type of population during the SMT and reflow process without an automated paste dispenser in the mix. Fri, 19 May 2017 09:53:40 GMT Regulating a steam-powered model generator Hello all. Thanks for taking up your time to read my post. In this age of questing for ever-more-efficient circuit designs, I have been presented with an anachronistic design problem: I need to keep a roughly constant load on a steam-powered turbine generator as the datasheet of <a class=roll href="" target="_blank"> </a>So I am looking for a linear regulator circuit that can dissipate slightly over 50W when all of the system electrical loads are switched off. And this is in a hostile environment: It's attached to a model steam locomotive, so exposed to relatively high ambient temperatures. I presume such circuits were once commonplace (for example in early automotive applications... or in real steam locomotives!) but I am not finding a lot of reference information on them online. Can anyone recommend a good design resource for such circuits? And perhaps an existing linear regulator part with a scheme for dissipating that much power in a high-temperature environment? The raw output of the generator is specified to be 3-phase AC, 0-12V (RMS? Peak-to-peak?) and 0-4.2A. Thu, 18 May 2017 23:36:46 GMT New SMT line introduction I have just been asked to project manage the introduction of new production line within my organisation . This normally wouldn't be a problem but I have very little experience on smt manufacturing. I guess the hard part is done as all the equipment has been ordered. What I need is some help and advice on what checklists or detailed schedules. Any help or advice would be a massive help. Thu, 18 May 2017 13:00:27 GMT Reel To Reel SMT Is anyone aware of equipment for reel-to-reel production, such as for continuous strip SMT ? Thu, 18 May 2017 09:57:00 GMT Selecting wave solder hello everyone, I need to choose between ERSA ETS 330 and SEHO GoWave 1030. can you please tell me your experiences with these machines? thank you very much. Thu, 18 May 2017 04:28:43 GMT Universal Motion dignanostic CD version 10.00 Hi Anyone having the Motion diagnostic software CD version 10.00 for Universal machine ( Advantis ) ? Thanks Wed, 17 May 2017 21:38:18 GMT I-Pulse M10 / M20 manual online? Anyone knows where I can get or read the I-Pulse M10 / M20 machine manual?I need to learn more about the software and the machine. Tue, 16 May 2017 22:45:26 GMT Electrovert econopak boot disk Any one happen to have an Electrovert econopak plus 400/f floppy boot disk that will run the machine? Tue, 16 May 2017 16:04:17 GMT commnication card faulty. can be Run the machine without comm. card if possible plz explain how? hi , can be run the reflow machine (MR933+) without communication card. Tue, 16 May 2017 06:17:37 GMT smt program if a person knows unisoft prontoPlace, can he learn circuitcam easily for juki machine smt programming ? Mon, 15 May 2017 15:20:48 GMT PCB Gold Pad Corrosion. Hi Guys, Currently im seeing corrosion on a gold pad as i shown in the picture. May i know is this corrosion or pad oxidation?? This defect were found after complete of all process including cleaning and im using water-soluble flux to run the product. Im suspecting this defect may occur due to uncleaned flux.May i know what are the possibility can lead to this defect?? Is there any chances to remove the corrosion? Mon, 15 May 2017 13:05:31 GMT