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Apr 9, 2010 | I think the oxidation on the pad happens easily but do not on Au plated pad.The reason may be caused by improper cleaning or Au plating thickness in plating process. But,before suspecting the pcb board, you need to check your process or used material first to verify the variation or improper
Mar 17, 2006 | nothing appears to be out of line. Is this KOKI a no-clean or water soluble? You may want to try to hit 225 at the problem lead with a TAL of 70 sec. You may also want to remove the soak or at least shorten if you can. We were talking about a single lead on a part right? or is it the whole
Mar 15, 2006 | paste will leave a mild residue on the board after reflow. No clean is just "less residue." thanks mac
Mar 8, 2006 |
Here's a good place to start:
Feb 26, 2006 |
We will run a no-clean wave solder process to assemble TV boards. What about incorporating a ROSE Test equipment (Ionograph, zero-ion, Omega Meter) in the process? Is it recommended, helpful or unnecessary?
I�ve read about the use and limits of ROSE on the web, but what I really need is a
Feb 26, 2006 | Hi, We will run a no-clean wave solder process to assemble TV boards. What about incorporating a ROSE Test equipment (Ionograph, zero-ion, Omega Meter) in the process? Is it recommended, helpful or unnecessary? I�ve read about the use and limits of ROSE on the web, but what I really need is a
Feb 24, 2006 | The No-Clean indium lead free paste runs well. We discontinued because of extremely high shipping costs. We can get the same results with cheaper product. Almost all of the discussion in this forum about SAC305 and SN100C have to do with wave soldering by the way. You were talking about Indium
Feb 14, 2006 | Yes, it's fine - as Pete says you have to replace certain parts & either get the pot recoated or a new one. We ran a "Lead free" 6622C from Vitronics Soltec on Tin Lead, then it was cleaned up, recoated and loaded with a no-lead alloy with no problems.
Jan 23, 2006 | Good day, Vibratory (MultiStick) feeder is bottleneck of any placement machine. If you feed expen
Jan 21, 2006 | Hi James, You can use the same flux for micro BGAs.The 529D we used for rework of high freq. CSPs and even w/out cleaning it still worked on 2.5GHz.We have not washed the flux for 6 months and the RF features of the circuits remain the same. No changes to be seen on HP8753D VNA. I do not have any
Jan 18, 2006 | I've seen both schools of thought on this. Do you really want to pay someone 7 bucks a hour to pick
Jan 12, 2006 | I am not too concerned about the cost of silver, SAC305 generated so much dross in our selective solder it was hard to keep the machine running for more than 20 or 30 minutes without fluxing the nozzles and cleaning the pot, and yes, we are using nitrogen. I have not seen any evidence that SAC305
Dec 16, 2005 | Hi Dave, Sorry, blonde moment. For our prototype line we decant the paste into a cleaned out pot, that goes under the printer hood, with the lid left on, the rest stays in the fridge until it starts to run down. If we get it wrong we definitely don't steal paste from another line.
Dec 11, 2005 | If you are taking off the old BGA then the board finish is not the same as it was orginally. I would want to clean the pads off as much as possible and then use sticky flux with the new BGA. But on the other hand, Aim solder has an article about small amounts of lead concentrating in small areas
Nov 17, 2005 | No clean and foam fluxing is not a very good process from my experience. I know that the flux manufacturers claim that they are suitable but I am not sure what "suitable" means. I would bet that you have very inconsistant flux coverage. How often do you check and adjust the solids level in your
Nov 17, 2005 | Hi, We have a board with over 100 chips (mixed size) and some long Connector DIP through out Wave solder with many issues of no solder and solder bridge, (using clean flux with bubble fluxer and Kester solder bar). Currently we tried to reduce the defects but can not kill them..Need your helpful
Nov 8, 2005 | Necessary tools are: * Chisel * Ball peen hammer After you buy two new nozzles, keep one in a baby food jar filled with your underfill suppliers recommended solvent for half the shift. At the break, swap the dirty nozzle on the machine with the clean nozzle in the jar and put the dirty nozzle
Nov 6, 2005 | Hi, We have been running Soltec reflow and wave, and are very happy with them. The software on the Soltec oven is great, but a bit stupid on the wave. However they are both great units, and after about 38,000 PCB's they are still totally clean with no hint of residue. Regards, Grant
Oct 31, 2005 | Hi There. I use to suffer the same pain,specially when i had limited board quantities. You can use an antiestatic transparency attached to the board using Kapton Tape,than place the double sticky tape. This work perfect,kapton tape residues clean very easy. Also you can use the board
Oct 19, 2005 | There are not too many Juki users that are active on this forum. I have been using them for over 10 years. Our company has had a variety of their machines as we have been upgrading over the years. We haven't had any major issues. Clean it up and grease it a little. Replace a filter or two
Oct 11, 2005 | the lead screws and guide rails and make sure everything is perfectly clean and lubed.
Sep 27, 2005 | Amol, Have you tried to conformal coat a bare board as it comes in from the board shop? If you still have the same results at least you know the problem is not related to your process. If you don't have the problem you need to have a closer look at your cleaning process.
Sep 15, 2005 | Is not a problem, I've done it. Be sure the insertion tooling and cut&clinch tooling are set to proper distances from the board. If proper, no deflection of PCBA should be observered during AI. Obviously, your AI Operator must be more careful with PCBA handling. I had mine wear clean white gloves
Sep 7, 2005 | The camera on the head of my Universal GSM1 (1994/5 model) displayed interference, and then the live video from it went red. This has never happened before. I've tried re-starting the machine, wriggling the camera feed wires, cleaning the lens etc. Does anyone know if this can be fixed and what
Aug 31, 2005 | One more thing to think about - if placing BGA's using water sol., you must ensure they are clean and dry beneath the component post wash. A few ways to do this. Simplest is to use DI from low pressurized nozzle and hand wash them at different attack angles then; dry them with compressed air
Aug 28, 2005 | I agree with Pete, I prefer to use High Temp Lubricant. Because it more clean compare to High Temp Grease. Usually i only do a few drip for 3-5 days, because purpose of lubricant is to make chain & shaft smooth.Since Biral is expensive lubricant i use Idemitsu High Temp oil to replace it.
Aug 11, 2005 | First off, your Hollis pot cannot withstand a SAC305 no-Pb alloy. Could corrode in as little as three months of continuous use. To "de-lead" you drain the pot, clean as much manually then flush with Sn. The wave user or your solder supplier typically does it
Aug 11, 2005 | I don't know if your pot can be cleaned out, but even if it can, lead free solder will almost certainly eat through your pot. There's plenty of information on this site about this subject, I recommend you try searching for something like "lead free wave". Good luck.
Jul 15, 2005 | working order and are all clean and spotless. Thank You Ramon Urrutia
Jul 14, 2005 | Hi Pyramus you should`t have a major problem after you wash the board as my crew also run into
Jul 14, 2005 | Hi Pyramus you should`t have a major problem after you wash the board as my crew also run into
May 27, 2005 | Well if I thought using wood tools was a good idea I would not have posted the question. Since the flash point of paper is 451F I would assum wood would be close? I guess I should have asked does anyone know of any tools kits or come up with there own for cleaning?
May 19, 2005 | Hi all, There are no ground layers which makes the non wetting rate a bit confounding. The foam fluxer has not been cleaned in a while though, while there is a strong evidence of fluxing by running blank paper and looking up the top side of the boards after fluxing. I would not expect
Apr 27, 2005 | Hello everyone, During our PIH process we found much flux residual around or on the joints of PIH after reflow.We use the Indium smq92j no clean solder paste.but the residual is too much to be accepted.can anybody share with me some ideas to solve the issue? Thanks a lot Regards! Bryan
Apr 13, 2005 | plant clean.
Apr 12, 2005 | The way we do this, is to tape a transparent film to the PCB. The printers and chip shooters can read fiducials no problems. Once it has been run through SMT, simply remove the tranparency film and the PCB is ready for use, no mess no cleaning and you still have all the components attached
Apr 7, 2005 | electricity, if the cleaning equipment/machine is not ESD-approved. Regards,
Apr 6, 2005 | Dave, Most dust and other crud is actually generated inside a plant. While working at another company they brought in consultants for this same issue. I don't remember the exact amount but only around 20% comes from the outside. Unless you are looking at a clean room type set-up with plenty
Apr 4, 2005 | are the PCB pad finisched ? OSP Enig? HAL? - Are you using Clean or NC solder paste? rgds GS
Mar 16, 2005 | cleaned off by changing the flex, so a replacement flex worked.
Mar 11, 2005 | I would change the Quad Align cable. If you have a spare head board swap that out as well. Make sure your Quad Align lenses are clean. If the camera is smudged then you can have some problems aligning parts as well. Let us know what you find. Cheers.
Mar 10, 2005 | Euro's....Euro's....ah yes here it is. RoHS, Article 4....shall not contain: Hex Chromium, lead, mercury and Euro's. I heard our sales guys telling a customer tour the other day that we were No Clean, VOC free, lead free and Euro free compliant!
Mar 10, 2005 | Thank you both for your assistance. I knew that I could count on you folks. The customer has purchased No-Clean flux and is using it as we speak. Hows that for customer service.... All in a days work... Thanks again You make me look good!!! Steve
Mar 3, 2005 | The gears should be wet. This gear box acts like a rear end axle. Not sure of the lubricant but it is like a red transission lube, comes in as complete unit from supplier. You can't get the lube from Speedline since it is sold as a complete unit. I would also clean the brushes on the motor
Mar 1, 2005 | I've just went thru cleaning all nozzles and I saw some of them stuck up. The reason for mine is that they're on the way out, between lock and the exit notch. I tried to reinstall them with the spring "forcing" the nozzle clockwise. Sound weird but I'll see if it helps.
Feb 22, 2005 | Probably: 1. Laytex reaction 2. Some other exposure at work or home FWIW: Cleaning anything with alcohol sucks. Alcohol toxicity could be your problem, but not like you think (hand contact). Consider inhillation as the exposure point. Work should mandate "Oil of Olay" for this type
Feb 13, 2005 | Need your help in buying a new PCB cleaning machine. are capable of removing all flux types (rosin, no-clean, water soluble). Solvent type machines are relatively uncommon in de-fluxing applications due to ever-increasing environmental regulations. Semi-Aqueous (solvent wash, water rinse) processes were popular during the initial phase-out of CDC -based cleaning solvents but today are not common. Today, aqueous represents the conventional wisdom. Aqueous-based chemicals are considered environmentally safe, operator safe, and very effective. These chemicals are widely available from companies such as Aqueous Technologies (my company), Kyzen, Petroferm
Feb 12, 2005 | Search the fine SMTnet Archives for previous discussions, while await other replies. Here's an exam
Feb 9, 2005 | Technical support cannot help with this issue, especially Electrovert tech support, those guys only know soldering and cleaning machines. Contact Jim Kaler at Camalot Applications Support: 603-641-8666 ex7208 or email@example.com
Jan 20, 2005 |
I agree with dave
here's an example of a previous thread on the subject.
Jan 11, 2005 |
Thanks for the suggestions...The unit was just cleaned last week and all the sludge was removed so that shouldnt be it. As for the concentration, im not sure. The only water that has gone into the evap is the rinse water. So im not sure if that could be it either. However, if i was to pull a sample
Jan 11, 2005 | Thanks for the suggestions...The unit was just cleaned last week and all the sludge was removed so that shouldnt be it. As for the concentration, im not sure. The only water that has gone into the evap is the rinse water. So im not sure if that could be it either. However, if i was to pull a sample
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