Electronics Forum | Wed May 24 12:15:53 EDT 2000 | Wolfgang Busko
Bill, I would assume that the stencil rests on the soldermask especially when you use a metallblade. If you know the difference in height between soldermask and land you could take that into your volume calculation when figuring out your desired ste
Electronics Forum | Wed May 03 13:56:14 EDT 2000 | Mark Charlton
Does anyone know a formula for determining my "Excess Capacity"? I know my machine's up AND down time, the effective placement rate, and my idle time. If my manager asks me what out "excess capacity" is, how do I use my "knowns" and calculate an ac
Electronics Forum | Tue Mar 28 16:23:44 EST 2000 | Michael Parker
While attempting to use the IPC-SM-782, land pattern calculator, I came across the term Component ID. (for example - "C1005") I am not sure what this is. I wanted to verify the IPC recommended land pattern for a Chip Capacitor with 0603 size. Can any
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 Apr 02 01:07:26 EDT 2001 | Dreamsniper
Hi Ed, Identify what equipment you really need as there are a hell of equipment in the market that would suit your desired throughput. Before buying or investing on capital equipment, calculate your expected ROI. Also don't forget to include the fut