Electronics Forum | Tue Jun 20 21:30:05 EDT 2006 | davef
The minimum vertical hole fill is defined as follows: Class 1: Not specified, with a 270-degree circumferential fillet and wetting on the secondary (solder source side) of lead and barrel, and a 75% coverage of the land area on the secondary side. Cl
Electronics Forum | Tue Jun 20 17:25:43 EDT 2006 | russ
i have just emailed Mr. guru, the company he reps does not exist in cyberland, but I am sure that they just have another means of communication, i have asked fopr public posting to substantiate these claims, I offered in return that if he comes thr
Electronics Forum | Wed Jun 21 16:30:07 EDT 2006 | GS
Hi Dallen, I do not know BTU VIP70 oven, any way make sure if it is not yet wired for 480 V 3Ph (wiring diagram), may be it needs just to reset wiring on terminal block in order to run at 480V. Best if you ask BTU. If not, you have to buy a Transfo
Electronics Forum | Mon Jun 26 03:56:44 EDT 2006 | slaine
hi I had a hunt round this morning and found all the schematic drawings for the vip70. Have you got a copy of them? where abouts in the uk are you im in Cumbria. drawing 5061617 appears to show some different wiring configerations, but im not sure if
Electronics Forum | Wed Jun 21 03:45:53 EDT 2006 | emeto
Hello SMT netters, Can anyone help me with AOI algorythms. I have to find out the differences between algorythms for recognition(black and white, grayscale, matching, golden board.....). I know all of you are using different type of AOI machines. C
Electronics Forum | Thu Jun 22 11:50:21 EDT 2006 | dougs
I wouldn't worry too much about the pixel comparison machines taking too long to program, it takes ages at first but once you've done a few programs you start to build a library of components. yes you may still have to slightly adjust these as you go
Electronics Forum | Fri Jun 23 07:25:06 EDT 2006 | emeto
Thank you for the post cuculi. I really appreciate it. I've read about some kind of vectoral imaging machine technology. The explanation of the principal was: When you desing the component in the library, the machine takes this information(dimensi
Electronics Forum | Fri Jun 23 01:19:19 EDT 2006 | Ola
Yes, leadfree paste is dispensable, but there is a completely diffrent paste than one will use at the stencil printer in the line. This is a very tricky one to deal with. We use xxx lf-free paste in the line, but that paste will Not at all work at th
Electronics Forum | Fri Jun 23 10:10:15 EDT 2006 | Gman
Some amount of voiding was always seen on sites where solder paste is printed. These voids are much smaller. However the site where a flip chip is flux dipped has never had problems with voiding. Macro voids (and huge ones at that)across the board s
Electronics Forum | Mon Jun 26 23:33:20 EDT 2006 | KEN
We saw this condition over 3 years ago. It sometimes is called "champagne bubbles". The intemetalic formation is interrupted due to the micro voiding reducing mechanical strength. I discovered this on lead free test vehicles for a major computer
