Electronics Forum | Fri Nov 03 09:41:17 EDT 2017 | davef
On your question about reliability ... " Is there testing we can do (environmental stress chambers) with which we can see the long-term effects of flux residue on solder joints?" Sure, incompletely activated low residue flux residues are potentially
Electronics Forum | Wed Jun 14 01:52:57 EDT 2017 | bukas
I have been using IPA for more than 3 years with no damage to stencils. what some cleaning solvent manufacturers claim is that you get better separation with their products, some even recommend nitrating stencil to enhance separation and avoid paste
Electronics Forum | Wed Jun 14 23:11:53 EDT 2017 | claire_08
sorry, I can't give you best solution for IPA versus stencil cleaning. But if you need new stencil, I can recommend you one, five-star praise supplier, they have stencil or with frame, various size at cheap price below 30% market price http://www.pcb
Electronics Forum | Thu Sep 07 08:45:02 EDT 2017 | dleeper
In my experience with similar sized parts, the nano coatings (or what ever your supplier might call them) do help with repeatable paste release. How are you cleaning your stencils? A big red flag to me is that your stencil worked fine for the first
Electronics Forum | Thu Sep 07 11:39:39 EDT 2017 | swag
Two magic bullets help us greatly with fine pitch printing: 1) nano coatings (we use a DEK product) YES it really does work 2) temperature control in the printer (AC unit). Of course good quality stencil and proper cleaning of the stencil are im
Electronics Forum | Thu Oct 05 07:11:35 EDT 2017 | emeto
Now you are putting your assembly to vibrate with frequency of 30-60kHz. What kind of flux/paste are you using? If it is NC there is no reason to clean. If it is water wash, you should consider a proper way of cleaning it according to your paste/flux
Electronics Forum | Thu Oct 05 10:25:13 EDT 2017 | davef
Consider ... * National Physical Laboratory (NPL) [http://www.npl.co.uk] did an extensive amount of research on proper frequencies and power levels for ultrasonic cleaning, maybe in late 1980s or early 1990s. That report might help you sort through
Electronics Forum | Thu Feb 01 15:30:26 EST 2018 | davef
I've known Mike Konrad for over 20 years. I like him. He is knowledgeable and generous in the giving of that knowledge. I have no issues with what he said in his vid. We should not get too overly twitchy when someone, sales-type or not, makes an eff
Electronics Forum | Thu Feb 01 15:36:42 EST 2018 | davef
Not to be repetitious, I just don't remember if this has been said or not, I'm old, give me a break. Some people have found that DI water is too thick to properly remove flux residue under low stand-off components.
Electronics Forum | Fri May 11 05:46:01 EDT 2018 | ringelgr
No i didn't move any cable just cleaned the old grease and applied a new one, also checked the tension of the belts and cleaned the inside of the machine. In any case no cables where moved at the maintenance process. And the only info i have is the
