Electronics Forum | Thu May 26 11:21:14 EDT 2011 | asksmt
Hello Guru's, I am using IPC-7351 LP Calulator to design Footprint (0603, 0805, 1206, SOT-23, etc) for all SMT Parts. Our Production Recently commented that they have included Red Glue Machine inhouse and will use Wave Soldering for Both Thru-hol
Electronics Forum | Tue May 31 14:23:16 EDT 2011 | gosswald
I bought an “as is’ Quad IIC package a while back. The machine definitely has issues with the Quadalign Board. The ICs were literally falling off of the board. I am guessing when it was manufactured they did not get the PC board quite hot enough or s
Electronics Forum | Thu Jun 02 14:57:36 EDT 2011 | davef
We don't expect properly soldered first-side DPAKs to fall from the board during second-side reflow. The ratio of weight to solder surface area for a DPAK is 1.32 gm per in^2, which is well within the limit of 44 gm per in^2. [Search the fine SMTnet
Electronics Forum | Tue Jun 07 10:38:34 EDT 2011 | davef
Boots: Here's several methods for guessing at the amount of solder on your connection: * First, 'Down & Dirty' ** Assume that the solder is flat, which is reasonable since it's 'flattened' by the component package ** Assume 100% paste transfer from t
Electronics Forum | Tue Jun 07 21:27:19 EDT 2011 | aoiguy
We're in the process of doing the same. We've gone through a large amount of presentations from at least 5 different machine manufacturers. MVP is one of the machines on the top of our list. Their GUI is very friendly, programming time was low compar
Electronics Forum | Tue Jun 07 20:56:47 EDT 2011 | aoiguy
Any and all input will be greatly appreciated. So here it goes. I'm having an issue where the cad I'm getting from customers is referencing pin 1 as the parts placement. This isn't an issue for surface mount, however the aoi machine that we have in
Electronics Forum | Wed Jun 08 13:41:56 EDT 2011 | swag
Two thoughts from me: 1)Are you sure the balls are collapsed? Have you looked at the perimeter from the side with a scope? From your x-ray, it appears you are correct in saying they are collapsed as the balls get smaller in a uniform fashion as you
Electronics Forum | Wed Jun 08 13:49:48 EDT 2011 | sonofptolemy
Hello, I am having a problem with HASL PCB's after it comes back from the stuffer. To me it looks like oxidation and it causes poor wetting. This leads to a bunch of problems all of which have different symptoms but the cause is this oxidation proble
Electronics Forum | Mon Jun 13 18:47:56 EDT 2011 | kahrpr
Cracked parts close to the edge on pizza cutters are a common problem. There are a lot of stresses on the board as the blade cuts through the board. Raising the blade height so that the boards are not cut clean through will help. You will have to fi
Electronics Forum | Mon Jun 27 01:34:30 EDT 2011 | samsim
I fully agreed do not CLEAN the NON CLEAN process. However, some customer may request to clean the non clean process; and they willing to pay for it. In order to clean the non clean processes (the residual on the board), you need to consider the comp
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