Electronics Forum | Mon May 09 17:27:46 EDT 2005 | cmiller
They are expensive so you need to have a lot of jobs that take a long time to hand solder or have a ton of masking. Also look at bottom side wave soldering, if you are having a lot of defects, the selective will allow you to solder both sides in surf
Electronics Forum | Wed May 04 19:09:52 EDT 2005 | russ
Can you not just check the part when it is on line and being loaded into the machine? You should only need to check this once. Verify your setup to the bom and not your assembled boards to the BOM. Correct setup and program = correct boards. More
Electronics Forum | Wed May 04 11:54:29 EDT 2005 | HOSS
Rob, Are you hinting that the lead content of this component with dipped tin/lead solder would not be an issue with RoHS? If so, our understanding is that the legislation requires that the 6 banned substances cannot exist at greater than X% in any
Electronics Forum | Thu May 05 09:50:29 EDT 2005 | patrickbruneel
Hi Hannu, You just gave a very realistic and practical view of the lead-free dilemma. The main reason that your coil coating doesn't get removed is because of the inability of lead free alloys to wet the surface and conduct the heat. Higher temperat
Electronics Forum | Mon May 09 10:52:29 EDT 2005 | patrickbruneel
Hannu, First and for all I have a problem with your question "tried and trusted" for the simple reason that you are going to change too lead-free. Ultrasonic soldering or welding is not new, as far as I know it is only used applying the ultrasonic
Electronics Forum | Thu May 05 12:31:27 EDT 2005 | russ
Not in this case, these BGAs were lead free and the profile used was for a lead part. I guess I will give you the whole story. These boards were sent to us from a customer to have the BGAs replaced for an unknown to us reason. We removed the parts
Electronics Forum | Mon May 09 15:21:28 EDT 2005 | tforbes
Hello, I am hoping that someone can shed some light on my somewhat strange question. The group that I recently started with have had a process in place where they do not run crystals through their wave solder process. From my previous work experien
Electronics Forum | Wed May 11 06:22:33 EDT 2005 | rlackey
The above suggestions look to be the most likely, however on the off chance: Going back a decade we saw damage to crystals & resonators due to induced harmonics from ultrasonics (usually in the wash). Some fluxer systems use ultrasonics (I think
Electronics Forum | Mon Jun 20 10:59:18 EDT 2005 | Jason Fullerton
Extra cooling is better (Alpha recommends -3 to -7 degC/sec) for cosmetics. Less chance of s o called 'cooling lines' that look similar to 'cold' tin-lead joints. (Seems a bit steep to me - I worry about the risk of cracking ceramic caps.) Might be
Electronics Forum | Wed May 11 16:13:49 EDT 2005 | keegomaster
Rob, - with free software upgrades included, how about hardware upgrades!? no prob paying for those? - "good part editor" do you have one you specially love/hate? - Bar corde reader is already considered, we're thinking on adding a DataMatrix reade
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