Electronics Forum | Mon Sep 17 19:06:55 EDT 2007 | davef
We have TR-460A. We do not use it very often, because of the level of experience of our troop. It is useful for companies looking to develop, structure, and organize their wave soldering process troubleshooting skills. The information in TR-460A is n
Electronics Forum | Wed Sep 19 17:36:16 EDT 2007 | slthomas
Like davef mentions, there are guidelines for both design and fabrication, not to mention assembly (which from the original post doesn't appear to come into play here). Not that I could improve on what dave has already shared, but it would be nice t
Electronics Forum | Thu Sep 20 13:06:37 EDT 2007 | hussman
Acualy same supplier, but they have 7 different facilities. Changes in prepreg thickness from lot to lot is the big deal, since internal shorting occurs form time to time. Just wondering if there was a spec I could use to force them to use the same
Electronics Forum | Thu Sep 20 15:05:20 EDT 2007 | jax
You can specify the prepreg thickness in the stackup. Once you have specified it somewhere, make your PCB manufacturer build to it... and prove it through cross-section analysis. Depending on the Board cost, we require a cross-section and analysis d
Electronics Forum | Wed Sep 19 21:04:57 EDT 2007 | wailiang81
Hi,davef, thanks for your concern. The condition was the pasted printed off with around 0.8~0.9mm from the land pattern. This will easy observe at QFP area. At fiducial, the stencil seens aligned accurately. Once solder bridge happend, its easy to
Electronics Forum | Thu Sep 20 07:26:42 EDT 2007 | davef
Jimmy So, it sounds like your stencil and board are made to dissimilar versions. Choices are: * Buy new stencil to match the pads on the board * Tweek position of stencil to better match-up with the pads on board, ignoring the fiducials. You may be a
Electronics Forum | Fri Sep 21 10:31:44 EDT 2007 | russ
this would be meaniung that somewhere in your documantation it should have spec called "repeatability" what this means is that when the vision aligns the stencil/board, the board will always be within "x" amount of the njominal xy "T" position, some
Electronics Forum | Thu Sep 20 23:10:11 EDT 2007 | valuems
You have a AP that needs to have the calibration and I expect you need to replace 1 or maybe 2 cards replaced. You probly got water in your air supply. The calibration will not be a easy one and special tools are needed. You can call us if you wis
Electronics Forum | Wed Sep 19 12:19:36 EDT 2007 | miguerre
Hi, We are lookin for somebody that would be able to repair a Sikama reflow soldering system model Falcon 3. The unit does not heat up, and the track stopped working as well. The machine is from year 1987 and the serial# 87-06-030 Also, if you hav
Electronics Forum | Wed Sep 19 14:11:30 EDT 2007 | sapo916
I currently have 250 sticks of DDR2 Laptop Ram and 300 Sticks of DDR Desktop ram. I need someone to rework / refurbish these to working condition. Can anyone help me find someone or maybe tell me what sort of keywords I should use when searching fo
