Electronics Forum | Mon Dec 03 15:03:49 EST 2018 | dleeper
I can't open your spread sheet to see how you calculate this, but usually this sort of calculation assumes the leads are spaced symmetrically on both sides of the part and the center of mass is between them. Gravity pulls the part down, while the wet
Electronics Forum | Thu Mar 21 16:50:10 EDT 2019 | emeto
Hello, I've done it before in Excel and it is a very simple concept. Inputs are board size, numbers of SMT and TH process sides, number of SMT and TH placements per side, boards per panel and quantity of boards to be produced. Output will be calcul
Electronics Forum | Thu Mar 02 15:12:50 EST 2000 | Robert Hartmann
To restate my question of earlier, if I have a .020" sphere before reflow, and my pad opening in the dielectric is .017", is there a rule of thumb to calculate the height of the sphere after reflow? We are using 62Sn/36Pb/2Ag spheres. This should h
Electronics Forum | Thu Mar 02 11:57:25 EST 2000 | Wolfgang Busko
Did you try the online-calculator at the IPC-page. If you have the datasheet it should be no problem. For wave soldering I can�t tell if it�s suitable for that particular part, but you should add extra pads at the end of each column to solderbridging
Electronics Forum | Fri Mar 03 06:41:09 EST 2000 | jacqueline coia
I have tried the IPC calculator and they do not have this type of component registered. When trying to select 'other' on menu, no connection can be made. The polarity if the QFP has not been decided yet (pre-PCB design) the pitch size of the componen
Electronics Forum | Fri Mar 03 10:12:41 EST 2000 | Dave F
Jack: "Calculator/Other" works for me. But you know what, I'll bet they block Scotts from using it, because they're reputed to be too cheap to buy the standard. ;-) (Your component is in the standard. ;-)) If you can't get the supplier to help and
Electronics Forum | Wed Mar 08 09:54:11 EST 2000 | Jacqueline Coia
Finally got using the calculator guys, (used another server connection). Not sure about the data that is entered for 'solder joint analysis', any helpful hints? To touch on the subject of Scots people being 'cheap', I cant understand these rumours, w
Electronics Forum | Wed Mar 01 17:07:50 EST 2000 | Dave F
Brian: Several things: � Many CAD systems offer compliant pad design libraries � Look at IPC-SM-782 "Surface Mount Design And Land Pattern Standard" � Some times, component manufacturers have the best information about pad designs for their compone
Electronics Forum | Mon Feb 21 12:02:58 EST 2000 | K. Ckak
Hi Dean, Can you please tell me how we could incorporate DPU to DPMO? Also, can you please explain the deviation factor DPU * deviation factor = DPMO ? Should we take dollar value or number of joints? Explain with calculations if you please. Thanks
Electronics Forum | Thu Feb 10 00:08:46 EST 2000 | Hon Choi
Dear all, We haven't been using CPH (chips per hour) as an index of our production capability, but it seems more and more attractive as a basis by which we can compare the capability of different plants producing different products. Are there any o
winsouce.jpg)
