Electronics Forum | Sat Mar 31 14:38:24 EST 2001 | scott
JAX Is right. ROI. How much will it cost to subcontract your assembly for the next 3 years vs. buying your own equipment AND staffing (ie: Process Eng, Maintenance, Skilled operators, etc.). Then, ask how much will it cost you to buy new equipment
Electronics Forum | Thu Apr 05 22:24:32 EDT 2001 | davef
I think your solder mask is a partial cause of your solder balling. Additionally, adjusting some machine set-up parameters may also help. 1 If we were talking about a single assembly problem, we�d be thinking about the laminate, but since you say t
Electronics Forum | Thu Oct 26 14:40:12 EDT 2000 | ptvianc
Hello: I have not seen a published formula for calculating the package weight that can be secured by molten solder. I have seen forumlas printed for tombstoning. From that aspect, we developed the following rule-of-thumb for first-order estimates:
Electronics Forum | Thu Aug 24 09:41:46 EDT 2000 | Dr. Ning-Cheng Lee
The optimal profile to choose is determined by the following factors, (1) thermal mass and distribution across the board, (2) reflow temperature range needed for a particular alloy, (3) the nature of flux. When the thermal mass is small, such as cell
Electronics Forum | Thu May 03 10:14:10 EDT 2001 | davef
Now, I'm not going to talk solder balls, in a traditional sense. I have an image of bilbous, globs of excess solder near the ends of PTH leads. If that's not what you have, ignore the following [and help us understand your situation better] ... Yo
Electronics Forum | Thu May 10 13:53:36 EDT 2001 | stefwitt
If you get the price for the tray and holder from Siemens you will follow Dave's recommendation. To get the 0 point for the tray ( from where you measure the first pick position )you set up the tray on the 7th track ( type 51 ). After you sent the da
Electronics Forum | Mon May 14 19:16:49 EDT 2001 | jagman
Dave: Actually, I'm located in the South Bay (Santa Clara)! Good guess. Now, for more in-depth information: So far, the distribution has been limited to one board out of 10 assembled, so far from one lot. The components assembled are exclusively
Electronics Forum | Wed May 16 08:48:12 EDT 2001 | ohboy
I been a bunch o' places...! Some good, some bad, re-inventing the wheel in many cases. Our specs are pretty specific in a lot of cases, but that doesn't mean they always get followed. It usually becomes a case of "It's not quite right, but we rea
Electronics Forum | Mon May 21 17:35:37 EDT 2001 | davef
We agree with LarryK, the previous poster. We know of no such ISO document, either. ISO can be found at: http://www.iso.ch/iso/en/ISOOnline.openerpage. ISO should be able confirm our thinking. Continuing: (1) Please get back to us if you find s
Electronics Forum | Mon May 21 17:37:51 EDT 2001 | davef
IPC-2222, Sectional Design Standard For Printed Board For Organic Printed Boards talks to scoring parameters in para. 5.3.1. You can obtain the standard at: http:///www.ipc.org. and Document Center [http://www.document-center.com/home.cfm/sid=71285
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