Electronics Manufacturing Forum Printed circuit board assembly, surface mount technology and electronics manufacturing forum discussions from Thu, 30 Jun 2016 17:31:40 GMT ENIG (thru hole ring turns black after wave soldering) Anybody see this kind of reject. The thru hole ring turns black (certain area) after wave soldering. The affected area cannot be soldered. Manual touh up is also not possible. Anybody what is the cause of this? Any lab test to prove what is the item that prevent soldering? Thu, 30 Jun 2016 03:14:34 GMT LOOKING FOR TUTOR: Seica S20 pilot flying probe tester We have been studying and learing how to work with an older Seica Pilot (S20 software) flying probe tester. A third party company has been very helpful but they are not that familiar with the S20 software. Looking for someone with knowledge of the S20 environment to do online/go to meeting training and or telephone training on this. We have made significant progress, but would be really helpful to have a 'big brother' to help us learn. We can work out a reasonable fee for such. Wed, 29 Jun 2016 16:30:48 GMT Samsung SM482 and BGA Hi, new to the forum here. First Post! Ive been using a Samsung sm482 for about 2 years and recently got the heads up that we will be getting a project soon with a BGA chip. Im wondering if anyone on here uses the SM482 for BGA and if so, can offer any advice. Feeling a little worried about it. We will also be using a Manncorp MC1400 stencil printer for the solder stenciling Thank you in advance for advice and help!!!!! Tue, 28 Jun 2016 00:11:30 GMT does anyone know about JUKI electric feeder and machinery feeder difference now days, I face a problem for JUKI electric feeder and machinery feeder. i do not know about any of electric feeder. until now, we all use machinery feeder for CF081ER 7' real holder and 15' real holder,CF03HPR ,FF12FS,FF16FS,AF24FS-OP. but this time when purchasing, someone told me the electric feeder is more compestive and higher efficency. he told CF081ER 7'and CF081ER 15' use 8mm electric feeder replace, and 12/16mm,24mm for ,FF12FS,FF16FS,AF24FS-OP. I do not know. does anyone can help? Mon, 27 Jun 2016 10:13:00 GMT help to id and purchase pcb transformer from LOWRANCE GPS I have a mini/micro transformer that is mounted on a pcb inside my lowrance gps/plotter. I have removed it from the pcb. It has 5 through hole pins, 3 pins out bottom one side and 2 pins out bottom on opposite side. The transformer has yellow tape around black plastic frame labeled GCi 0550 LF 029-0110-02 with yellow tape around the windings. I need one of these or a suitable replacement. please help id and locate to purchase. Thanks I can post pic if needed. Sun, 26 Jun 2016 08:34:18 GMT 265 GSX printer "Position error" on rising table Hi all, I have a problem on my 265 GSX printer. "Position error" on the rising table. Machine was running fine and then out of the blue the error occurs, takes a few power downs and not working... The table does not move then error occurs... Also fuse for 44VAC keeps going on Any advise appreciated. Fri, 24 Jun 2016 08:40:58 GMT DRY SOLDER ISSUE we face the problem to last month dry solder issue.when we found PCB is dry. (PTH not fill not properly)then we change the parameter like flux Tank pressure increase 130 to 250. after these activity PCB is ok no dry solder found......but problem is our standard parameter 130 not 250. plz suggest to me how to control this problem and wt is main issue Fri, 24 Jun 2016 07:32:53 GMT JUKI FlexSolder w620 questions Hello, Does anyone know where I can find any information or documentation on the miniwave height sensor and control. I feel like the company I'm working for is possibly using the machine incorrectly in this regard. I assume, but would like to verify, that wave height is dependent on the nozzle type, diameter, type of solder, pitch of the component leads, and method of solder (ie. point to point soldering, or running the nozzle down a row of leads). Thanks Fri, 24 Jun 2016 04:51:38 GMT JUKI FlexSolder w620 Fri, 24 Jun 2016 03:52:32 GMT EKRA E5 maschine nicht ansprechbar hi guys, is there anyone know how to repair this error "maschine nicht ansprechbar" or "machine unresponsive". thanks for any help.. Thu, 23 Jun 2016 02:14:12 GMT Removing Treiber Wave Soldering Machine Chains The machine has been giving me trouble as the components are frequently lifted off the board and falling off as it goes through the conveyor. I am trying to remove the conveyor chains hoping to re-balance them. Is there a way to remove them and adjust. As well as has anyone else experienced this problem and found a good fix? Tue, 21 Jun 2016 11:58:42 GMT AOI outsourcing using Photo Does anyone know of anyone that would inspect our Finished PCBs using photos for their software, instead of shipping out the PCB's? We have boards that are quite heavy. We need them inspected for thru hole accuracy. Or if you know any software that is priced reasonably to do a picture comparison easily. Please any info would help. Thanks Mon, 20 Jun 2016 16:17:34 GMT caps have yellow stain after wash My operator applied flux gel ALPHA WS-609 on MG P/N FTH101XAP (CAP ALUM 100UF 50V 20% SMD) before aqueous washing the PCBAs. Solder paste used was ALPHA WS-820. Now the caps have yellow stains. Any solution to this is appreciated. Tks Fri, 17 Jun 2016 14:55:01 GMT Wave Solder Bean Bags Does anyone have a good answer to lifted components? I read on this site (old thread) that someone designed bean bags to set on top of a PCB to keep the components down on the board. I know that seems like a short cut to eliminate lifted components. However, I have tried to profile these wave solder (kic2000) machines and there doesn't seem to be a problem with the profile. Any help is greatly appreciated. Fri, 17 Jun 2016 08:06:53 GMT Thermal relief We all know that whenever possible, we want thermal relief between the barrel/pad and the copper foil to make it easier to properly solder that through hole connector. My question is, assuming there is no connection from the barrel to a copper layer (or in this case, 4 sheets of copper that aren't connected to it) but the gap is narrow, is there any reason to think that expanding that gap would provide any additional thermal relief? Does heat flow jump a narrow gap easily enough that additional relief might be of some benefit? Edited to add that the barrels that we're having problems soldering to have a 4 mil gap between them and the copper layers they not connected to. The other two have 10 mil gaps and no issues, hence the question. The balance between scorching the board and 50% top side fill is touchy with this one. Thu, 16 Jun 2016 16:34:59 GMT Used auto printer; any to avoid? Our company is looking to upgrade from a dek249 semi-auto printer to an automatic inline printer since we're doing some fine pitch packages which are tricky to line up, and we'll soon be tackling bga's for our products. We're looking on the used market exclusively; we can't afford new machines. We would prefer a smaller foot print machine to save space. Some models that we are considering are dek 265gsx and mpm up2000. Does anyone have thoughts on these models or specific used machines to avoid in our search? Thu, 16 Jun 2016 11:48:00 GMT SMT Stencil Cleaner May I know what SMT Stencil Cleaner machine you used and what are the benefits? We are looking to buy Ultrasonic Stencil Cleaner machine. Your help is very much appreciated. Thank you. Thu, 16 Jun 2016 11:23:26 GMT BGA Top Cap Detached after reflow Soldering Hi, I have problem with one of the BGA Top Cap Detached from the Solder Balis attached to the BGA. Advice /Suggest why the Top Cap Has come out. We produced 4150 Pieces & had similar problems with 5 Pieces. Thx in advance for all your suggestions. Thanks, Nagesh Sun, 12 Jun 2016 09:29:41 GMT high speed PCB frequency range i'm new to pcb design and i'm wondering that starting from which frequency range we need to apply the high speed PCB design rules and techniques ? Sat, 11 Jun 2016 07:58:17 GMT Juki 740 service manual Hello. We have a problem with our Juki 740 machine. It does not start at all, both monitors are blank. The only error we can see is "FAIL" LED on CPU board and red "LD2" LED on "AC SERVO BOARD". Does anyone know what the "LD2" LED means? Or, even better, does anyone have a service manual for Juki 740 (or Zevatech 740) or similar unit. Thanks, Martin. Sat, 11 Jun 2016 03:27:30 GMT Unknown Part Can any body help me identify the part. There is no part number printed on it. Looks like an EMI filter. It is labeled as T3 on the PCB and is placed on the power input line of 28Vdc Thu, 09 Jun 2016 18:59:49 GMT We are now building 48 inch (1200mm) SMT assemblies. We finally got our long board line up and running. As a Contract Manufacturer, of course, we are at the mercy of our customers. I'm wondering if anyone else that is producing these large assemblies might have any advice on handling or any other pitfalls we might encounter along the way? Tue, 07 Jun 2016 12:40:34 GMT Wave Solder Bean Bags Tue, 07 Jun 2016 12:11:02 GMT ultraflex 3000 mpm need soft. good afternoon. help us. we broke the hard disk in the printer MPM Ultraflex 3000. we need a copy yury tsupa. good afternoon. ultraflex 3000 mpm need soft. help us. we broke the hard disk in the printer MPM Ultraflex 3000. we need a copy of your hard disk this printer or software to install - distribution. cd install. Thank you. payment guarantee. Tue, 07 Jun 2016 03:35:28 GMT Auto calculate Aperture are on stnecils Hi All I have a need to calculate the Aperture area in a stencil with in a very short time without going in to a CAD viewer. I need that when I insert solder paste file in to a certain software application and that application software calculate the area of each Aperture in the stencil and output a single value of the total area covered by the Apertures. Thanks in advance for any information, Milroy Mon, 06 Jun 2016 18:48:04 GMT