Electronics Manufacturing Forum Printed circuit board assembly, surface mount technology and electronics manufacturing forum discussions from Mon, 28 Jul 2014 20:27:38 GMT Problems with Ekra E5 Hi Everybody, I have an Ekra E5 and I have two problems. - Anybody have english operator/service manual to this machine? - I have problems with understencil cleaner dispenser. If I start to flow the stencil cleaner then the dispenser doen't move or move with intermittent motion. I changed to service and tried to send it to zero point. It can't reach the zero point, the dispenser halt on one-third position everytime. I'll really happy if somebody can help to solver this problems. Mon, 28 Jul 2014 11:53:34 GMT CP4-2 Fuji Nozzle Position Alarm Trouble shooting. Sat, 26 Jul 2014 12:37:10 GMT Help Heller 1700W PLC red ERRor LED flashing We turned our Heller 1700W off and On a week later and it would not heat up. PC is communicating - TSX NANO PLC has ERRor LED flashing which means lost its program - can I get this or at least the operation (flow chart)of the PLC and either replace it with new available or re-program it. Any help appreciated. Thx Cb OR - if anyone has a 1700W and can video the power up sequence on the Main PLC it would be greatly appreciated. Sat, 26 Jul 2014 12:16:46 GMT Nozzle posistion Alarm Fugi CP4-2 Fri, 25 Jul 2014 14:40:44 GMT Tether Powered UAV Hello all! Looking for some input on a technical issue I'm trying to overcome. I am building a quadcopter UAV weighting about 1 pound and powered via tether. Each of the four brushless motors pulls a max current of 17 amps and runs off of 12V. Since four motors together pull up to 70 amps, I didn't want to run the necessary current directly up the tether from the power source since that would require a heavy 6 gauge wire. My present setup, then, utilizes a lighter 22 gauge wire connected to a power source outputting 60V and 1 amp. Power is then split on the actual UAV between two DC-DC converters which are rated for an input of 36-75V and an output of 12V and up to 35 amps. Each converter is connected to two motors, so the max current draw should be 34 amps which is within the 35 amp output tolerance. My problem is that when I ran this setup with my motors, the system worked for a few minutes, but then the DC-DC converters shut down. I am certain that the shut down is due to their going into a hic-up mode as opposed to board damage. I just am not sure what I am doing that is causing the shutdown. All of my input/output parameters are within tolerance. My only guess is that the converters do not like the varying output current draw that results from the motors switching to different RPMs. Anyone have any ideas on what might be causing the shutdown? If no solution is feasible with these converters, can anyone think of a alternate DC-DC converter I can obtain that will output 12V and 35 to 70 amps with the current, of course, able to vary with the RPMs of the motors? Present DC-DC Converter: <a class=roll href="" target="_blank"> </a> Thanks! Ryan Fri, 25 Jul 2014 11:36:00 GMT MPM Accuflex fails to initialize powered rail We've got an MPM Accuflex printer that generally works great, but we've had a recurring problem. The powered rail (rear rail) fails to initialize. Sometimes all it takes is restarting the machine to get it to work. At the suggestion of the repair tech we bought the machine from, I've thoroughly cleans the lead screws, and lubricated them. I've lubricated the bushing for the idler pulleys, and finally replaced the very expensive drive motor. And it failed again this morning. I know the rails are square, the lead screws are clean, and the motor should be good. Idler pulleys are turning with no issues. I feel like it has to be software or motor driver related since restarting the computer sometimes works. Any thoughts? Fri, 25 Jul 2014 10:13:01 GMT Step Stencils Hello all, what is your opinion on step stencils. Is it better to have the step on the squeegee side or on the bottom side of the stencil? Why you do it this way? What are the advantages and disadvantages? Fri, 25 Jul 2014 09:54:00 GMT Pick and place machine for small productions. Any suggestions? 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 budget (10k to 15k EUR / 15K to 20K USD) for the PnP machine and we were wondering if it is better to purchase a new unit or a used one. We have been investigating different alternatives for new equipment, and these are the conclusions: - Manncorp FVX Benchtop is the basic one from Manncorp and it is already out of our budget. - Termway TP300V: this one has vision and seems to be quite good and costs USD18000. However this is a chinese manufacturer and I cannot get any feedback from people using it in the real world. - Essemtec Pantera without vision is in the range of the 40K EUR, so it is out of our budget - Mechatronika M10V: this one has vision and the total budget including some feeders is almost 20K EUR. It is slow, as it can place 1600 CPH, but up to what we have now, it is the best option, although it is over our budget. Any one of you has some experience with this machine? In the second-hand market we can get here in Spain one TWS Quadra Mechanical for 12k EUR, but up to what we have heard they are not reliable assembling small parts and fine pitch. And we have the option of an Autotronik BS383V1 for around 35000 EUR, but it is out of our budget. We have seen lots of offers for 15k USD machines outside Spain, and we have written a lot of emails asking for details and 90% of the people are not even answering us. Well, what is your advice? Would you go for the Mechatronika? Do you know any other manufacturer for low cost PnP machines? Any one of you wants to sell his old equipment and ship it to spain? Juan Fri, 25 Jul 2014 03:19:00 GMT Failure Analysis by External Lab Hi All.. I need your advice, when you send your boards to be analized by external lab, what kind of result would you expect from them? Do you expect them to find the root cause of the problem and give countermeasure of the problem? (this is what I expect) History: We have an issue on our board, which we assume it is Black Pad (or any other PCB manufacturing failure). And we send some samples to external lab to analize the root cause. The problem is, their test is not suitable for confirming a black pad (I think). Because they only do a cross section & SEM with 200x. While based on some papers I read, should be SEM with 7000x. They also do FTIR which result is not conclusive (we didnt ever understand the meaning) "Based on the FTIR results, the closest matching of "PCB Surface" and the "BGA Surface" to the FTIR library is 2,4-diaminopurine hemisulfate hydrate and 2,6-diamino-8-purinol hemisulfate hydrate with 83.4% and 69.0% matching respectively. Spectral matching between "PCB surface" and "BGA surface" is 77.99%" Seems they only lending us their machine to do the test, but not analyzing the problem. Thu, 24 Jul 2014 03:33:30 GMT SMT setup reduction how much time in average do you spend in set up time? how much % of productive time do you waste in setup? what smd equipment do you have? Wed, 23 Jul 2014 18:14:46 GMT STF100S Troubleshooting Wed, 23 Jul 2014 15:25:25 GMT Meridian 1020P Camera LED In the middle of my run yesterday the camera LED's in front and back wont turn on during inspection step. I can manually turn them on in the program edit screen, but as soon as I try to inspect a part they turn off. Was hoping a restart this morning would clear it up but it started not working again. Yesterday the heads would make 2 attempts to inspect parts, then give me a vision failure. Today it does 3 attempts and a board failure (i.e. thinks a feeder is out of parts) So 2 questions: 1) Has anyone had this problem before and can help? 2) Can I just try to make them stay on permanantly regardless of LED life span? Wed, 23 Jul 2014 12:32:53 GMT Need help on unit convertion - solder paste printer Hi All... Need your advice on the unit of measurement for solder paste pressure. My current company use SP machine from 2 vendor, both are using different unit of measurement. 1. Yamaha uom N 2. DEK uom Kg Up until now I dont know how to do convertion between them. Question is how to convert between N & Kg? if there are a tool or online calculator for it, please share. regards Edri Wed, 23 Jul 2014 08:01:45 GMT Philips Topaz manuals Hi Everybody! For this time I was using Philips Topaz (old type, not X or not Xi). In net I found full user manual (pdf file, 420 pages) and corrupted service manual (pdf file, 260 pages). In service manual only chapters from 1 to 10. Needeed other chapter from 11 to 17. Do anybody have full manuals for this? Thanks for all for any help Wed, 23 Jul 2014 02:57:00 GMT Obtaing dark discoloration issue at top side after reflow (bottom built) in half of the board Tue, 22 Jul 2014 23:26:03 GMT SAKI AOI MACHINE Hello,my question as below: 1. If the component is black color but the color of PCB is dark green. It seem no different in color between it. Any suitable algorithm can be used on it? 2. Algorithm Mem1-Mem2 make many false error and affect the First Pass Yield. Any way to reduce its false error? Thank You. Tue, 22 Jul 2014 21:49:10 GMT Philips Topaz manuals Hi Everybody! For this time I was using Philips Topaz (old type, not X or not Xi). In net I found full user manual (pdf file, 420 pages) and corrupted service manual (pdf file, 260 pages). In service manual only chapters from 1 to 10. Needeed other chapter from 11 to 17. Do anybody have full manuals for this? Thanks for all for any help My email is voodoo_pr (dog) mail (dot) ru Tue, 22 Jul 2014 03:54:49 GMT Inline pcb laser etcher What is the base cost of an inline pcb etcher? Specs: fiducial alignment, smema interface, 400mm x 400mm marking area. Will be used to mark panel 2d codes, pcb array 2d codes, and human readable. Thanks Gm Mon, 21 Jul 2014 22:37:07 GMT Smt Companies Hi Guys, i'm new working with smt spare parts and equipments, but i'm having hard time finding new companies that may buy my products. I sell smt spare parts, from various brands. Can u help me? Where do you find companies the most? Mon, 21 Jul 2014 13:35:48 GMT What is a typical SMT placement defect rate? I'm looking for a typical SMT placement defect rate from others in the field so I can judge whether or not we are in an acceptable range. If I give you a board with 200 components (0603, 0805, SOICs, 20mil MSOPs, tantalums, DPAKs and a few 20mil fine pitch QFPs), what percentage of boards coming out of the placement machine would be considered defect free, without having to nudge or fix any components before reflow? In other words, if you run 100 of these boards on your equipment, how many out of 100 would pass through test and inspection without defects? Assume no odd form hand placed parts. A defect would be a missing part, wrong part, laying on its side, reversed, skewed off the pads or misalignment requiring nudging. Slight misalignment that would self-center during reflow and therefore not cause a defect is not counted. Simple boards, complex boards...I'd like to hear about YOUR experience. Thank you in advance. Mon, 21 Jul 2014 12:23:31 GMT OSP PCB Plating I have a small prototype shop and I received a PCB with OSP plating and I have never used it before. The assembly has several BGAs and I have always used the standard gold plating. Can anyone give me any information on OSP??? Does it solder well? What I read it acts very similar to HASL in the reflow but has better print quality. June Mon, 21 Jul 2014 03:48:06 GMT Sending defective board to external party (Lab) Mon, 21 Jul 2014 03:40:28 GMT too much foam in our Speedline TechnologiesELEOCTROVERT/Aquastorm 200 Hi all, we have a Speedline Technologies ELEOCTROVERT/Aquastorm 200. In January we stared supplying it with pre-filterd to the DI cabinet next to machine so our large media would last longer. All was fine for about 4 months and then we started getting high level alarms in the rinse tank and found an excessive amount of foam there. We add anti-foam agents but my question is why was it fine for so long, and now daily alarms due to the foam. I have washed down the zones and the sumps and We have not changed any chemicals in the process(i.e. flux or paste)Any ideas would be greatly appreciated. Fri, 18 Jul 2014 15:25:19 GMT Component Tinning Equipment Options (Automated preferred) Hi All, We leadform components for our assemblies in house and have been tinning the leads using a dip methood by hand into a solder pot. by just handling the components during the tinning and cleaning process we are at times damaging the parts/lead bends. We are considering the acquisition of an automated system to help remove the operator error from the equation, however i'm not familiar with products on the market. Can anyone provide suggestions of what they've worked with and or like? We leadform and need to tin a range of high-rel components from QFPs to Flatpack SOICs to through hole axial leaded compnents etc. occationally there are Leadless Chip Carriers (LCCs) that get re-tinned. Thanks Fri, 18 Jul 2014 10:19:45 GMT Manual For Vtek-TM-4400 with membrane front panel LCD controller I just got a Vtek TM4400 used, and have manuals for most of it, however the operation/programming manual chapter 3 I have is for the newer Touchscreen interface. My unit is a 2 line backlit LCD with a membrane switch panel, I am looking for the operating/programming instruction (chapter 3?) for this type of controller Thu, 17 Jul 2014 17:40:13 GMT