Electronics Forum | Thu Nov 18 09:34:58 EST 1999 | Wolfgang Busko
Hi Will, it�s possible to use second reflow for second side components without glueing or use of different alloy solders. Although the first soldered joints become liquid during the second pass the parts will not fall off as long as their weight does
Electronics Forum | Thu Nov 25 20:28:43 EST 1999 | cklau
hello, One way to prevent copper land delamination is to applied Anchoring spurs also referred to as "tie-down tabs" or "rabbit ears".These are a metal projection around a land.This features is fully captured by the cover lay (cover coat) that is n
Electronics Forum | Sun Nov 14 20:52:38 EST 1999 | chartrain
What is your definition of a lot of money for a UPS? You mention very expensive components on your boards. What is their worth comapred to the UPS? A generator hooked to the conveyor would in theory work. but what is the cost of the generator? Who wi
Electronics Forum | Mon Nov 15 10:43:23 EST 1999 | Brian W.
I think the issue may be more than just the oven. I worked at a facility in Florida, where lightning strikes were common. We installed backup generators for the facility. Among the issues and costs we analyzed were: frequency of outages, boards i
Electronics Forum | Fri Nov 05 21:29:56 EST 1999 | chartrain
No matter what type container you use, air in the delivery line will always be a problem. When you pop the lid on a pressurized container, fill it with a liquid and reseal it, air will be present over the liquid. Where do you think it goes?It has to
Electronics Forum | Thu Nov 04 11:20:48 EST 1999 | Brian
Hi, all! I've been away in the USA for 10 days and, coming back, I find that various questions which I had asked of the staff at SMTnet had been totally ignored. I have therefore taken the decision to resign from the Editorial Board of SMT Express a
Electronics Forum | Fri Nov 05 09:52:44 EST 1999 | Dave F
John: Three things: 1 You are correctamundo!!!! What's the difference between slopping alcohol on dirty boards and washing dirty boards? Clean boards!!!! By the time those very nice people get done with their alcohol cleaning (a nip for the boar
Electronics Forum | Thu Nov 11 17:17:11 EST 1999 | Boca
1. Most ionic testing is measured in NaCl, that is, the ionic residues are quantified in terms of NaCl equivalence. The test does not determine what the ionic residue is, just its relative strengh. 2. I use IPC cleanliness specs on OA fluxes but n
Electronics Forum | Tue Nov 02 03:39:09 EST 1999 | cklau
FABmaster gold version can read many kinds of CAD data i.e Zuken CADSTAR , PADS ,Mentor Graphics, Cadence and etc and the best place that could find great information for manufacturing is thru the CAD data.FABmaster actually act as a multiple i/o for
Electronics Forum | Tue Nov 02 23:34:58 EST 1999 | chartrain
You appear to have two problems working against you at once. One is component lead corrosion that the no clean flux isn't aggressive enough to remove. Do a simple dip and look test. Flux the leads of a component and dip it into the molten solder for