Electronics Forum | Fri Jun 04 21:27:16 EDT 2010 | deanm
We have a 4 zone Quad ZCR 531B reflow oven with top side heaters only and a mesh belt. Our boards are 2-6 layer, range in size from 2x2 to 7x15, 0402 to D2PAK. What are the limitations/drawbacks of having top side only heat, especially since about ha
Electronics Forum | Sun Jun 13 10:53:20 EDT 2010 | bderks
Thank you all for responding, Pyropel might indeed be adequate and still cheap enough. Someone advised me aerogel, but we certainly can't afford that ;-) I've contacted WWW.rubber.com as well, but I'm still waiting for a reply. Why reinvent the w
Electronics Forum | Tue Jun 08 17:51:37 EDT 2010 | vmorina
Hi Vee, We are planing on doing low-medium volume and prototyping boards with the following packages. TQFP, BGA and other SMT packages. I would like to go with some thing like batch/tabletop oven for now, but I am not excluding conveyor reflow oven
Electronics Forum | Thu Jun 10 16:42:11 EDT 2010 | daxman
Hi Muarty, We've had a lot of experience with QFN's now. Several years ago we started testing various design methods of the via arrays as well as paste apertures to cover the arrays. There has been some time that has passed now since these packages
Electronics Forum | Wed Jun 30 00:20:08 EDT 2010 | leadthree
Thanks for your reply. This production lot is already finished. We produced in 2 lots, first was no-clean (and was ok), 2nd lot was cleaned (aqua based), and I need to look into the cleaning further. Since it's all finished I can't get parts from se
Electronics Forum | Wed Sep 29 08:26:03 EDT 2010 | babe7362000
We are Currently running a Board and it seems that the SOT-223's on the bottom side have flux and water trapped under the part. Nothing has changed in our process and this is the only board that it is happening on. We are using Kester R562 water wa
Electronics Forum | Fri Dec 17 10:42:58 EST 2010 | hegemon
I believe there is a lot pertinent information in the thread that Dave forwarded... But (IMHO)I think you can look at two things first. First, is your wave solder process friendly to this large PCB, is there enough pre-heat in the board before it h
Electronics Forum | Tue Dec 21 18:08:40 EST 2010 | cbroegger
Hi Gary. I have the same problem on my Siplace feeders, and have tried different products like you have. This is what I have experienced so far: The "bag sealer" method does not really work well. Problem is that the tape foil type (plastic type) var
Electronics Forum | Tue Jan 11 19:38:44 EST 2011 | hegemon
There are a number of manufacturers of Benchtop Hot air stations. For what you are describing, look at Hakko as well as A.P.E. (if they are still around, they made a great little machine called a ?Chipmaster?, and if you added preheat, I think you
Electronics Forum | Tue Feb 08 10:25:46 EST 2011 | remullis
Michelle, It's been years since I worked on these machines and mine were CS400E's. The next time this error comes up instead of powering down Unplug the RS232 cable that links between the PC and the processor board in the machine, I cant remember if
