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QFN welding problem by reflux oven 10 zones

Electronics Forum | Tue Feb 11 11:00:13 EST 2020 | astarotf

hello Evtimov Thanks for your answer. I will analyze the curve with our pasta supplier to reconfirm if it is adequate. It would also be helpful if you could share the tin lead curve profile to analyze. The location of the QFN is assembled by the top

Manufacturers of

Electronics Forum | Sat Dec 04 18:55:38 EST 2004 | Grant

Hi, Yes, all you really need to do is boil the fluid while suspending the PCB above the vapor, so it's quite easy. However I would recommend against dropping the board direct into the vapor cloud, as that would be a very fast warm up, while letting

Low volume prototyping

Electronics Forum | Wed Jul 05 01:22:29 EDT 2006 | grantp

Hi, When I started out and we were the same we got an old MYDATA TP9-2U. It places everything, and you should be able to get a cheap one second hand, that will perform very well. They have vision as well, as an options, and that works very well. I w

Low volume prototyping

Electronics Forum | Fri Jul 13 10:35:07 EDT 2007 | nurquhar

Do you think it would be possible to make a home made vapour phase machine for say $500. What I am think is making an 18 inch square cube type box with a transparrent lid out of s/s or copper. Fit some heating element to the base to heat the liquid

Vapor phase versus forced convection

Electronics Forum | Wed Aug 18 00:53:16 EDT 2004 | Grant

Hi, I think you cannot go wrong with Convection. If you want to experiment with VP, just get some of the fluid and put it into a pasta cooker on a standard domestic hot plate. Have a basin full of cold water so after reflow you can lift the cooker a

Vapor (vapour) Phase?

Electronics Forum | Sun Jun 15 04:16:12 EDT 2008 | grantp

Hi, We used it previously a few years ago, and I think I posted some comments on it here in the forum in the past you might want to search out. It's a weird process, because it solders incredibly, and I mean it's incredible. There is no oxygen, so

Seeking very low volume production reflow oven

Electronics Forum | Mon May 01 23:23:58 EDT 2006 | grantp

Hi, I off center idea we used when we started. Get a pasta cooker, and put in vapor phase fluid, and then use that. Place the product in the bottom of the inner pot, and then heat on a small hot plate. When the vapor cloud gets high enough and the

Homebrew vapour phase...?

Electronics Forum | Fri Jun 11 21:17:46 EDT 2010 | whitewing

I was wondering how hard it would be to make a homebrew vapour phase oven, to avoid the problems with very cheap conventional batch ovens, in particular uniformity. I've seen a reference here to a pasta cooker VP setup, but the image link is dead no

Warming up solder paste at start of days production

Electronics Forum | Mon Jul 26 19:37:47 EDT 2004 | Grant

Hi, It was funny. The sight of 3 men standing around the microwave daring each other to push the start button, and then freaking out when the whole thing looked as though it was going to explode was funny. I guess you have to try these things! Tho

Screen Printer Selection

Electronics Forum | Thu Nov 05 23:24:56 EST 2020 | neosroger

I would like to request your expertise on which pasta printer to purchase: MPM Momentum + EKRA XPRT 3 Both of them are refurbished/ reaconditoned. The MPM includes several perpetual Software licenses but it is almost double the price of the EKRA


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