Electronics Forum | Fri Mar 21 18:12:31 EST 2003 | Judy
I look at boards coming out of the oven top side and bottom If I take that board after its been glued on bottom side out of the oven and look at the top side when I pick up that board you should see the glue parts that fell off you really have to wa
Electronics Forum | Wed Mar 24 12:36:26 EST 2004 | wintech
Hello We are using a No-Clean process for a lot of boards that we do, but the customer needs the flux removed off the bottom side of the board and there is to many leaded components that can not go through a water wash, so is what we do is clean th
Electronics Forum | Sat Apr 03 05:22:46 EST 2004 | wsanita
Customer returned a board and a 50 pin connector with .020" pitch that "fell off". after looking under a scope i can see the plating of the connector embedded in the solder. To me it looks like it broke off. Designer did not put the anchor pads on th
Electronics Forum | Thu Feb 24 23:01:30 EST 2005 | smtuser1234
One other thing to check is your PEC camera. Universal uses a jig to calibrate this camera but you could check it using this method. 1.Run about ten 0402 parts on tape with the PEC camera off and check placement. If the placement is off change the x\
Electronics Forum | Mon May 01 22:55:02 EDT 2006 | KEN
....am I reading this correctly? "Screen Printing" or "Stencil Printing" Screen = agree = off-contact.....it's fuzzy going back into the memory banks to the early 90's. Screen mesh and emulsion will stretch to produce the gasket affect while snapp
Electronics Forum | Mon Jun 12 17:32:17 EDT 2006 | flipit
Hi, A little off subject but I just finished a quick little experiment where I placed 0201 to 1206 and some ceramic resonators at specific distances off the scored edge. The distances from scored edge ranged from 0.025" on up at 0.025" increments.
Electronics Forum | Wed Mar 25 18:29:47 EDT 2009 | badnewz
My Quad IVc's will also do the same thing. Mine are equipped with CyberOptics scanners, not QuadAlign. The Cyberoptics scanners do go bad and once they do, they get very warm to the touch and at the same time, if the Quad is reset, the theta axis wil
Electronics Forum | Tue Feb 24 18:33:59 EST 2009 | gregoryyork
It is probably due to the solder mask being undercured and is porous alowing the flux to be absorbed which boils when it hits the solder wave that kills the adhesion. You should be seeing this only over copper traces/tracks. Reduce flux volume and in
Electronics Forum | Wed Jul 29 10:46:04 EDT 2009 | babe7362000
I was wondering if anyone knows the best way to clean oxides off of fine pitch components? Apparently the paste we use does not have strong enough flux to remove the oxides off of the leads of the components. I have validated the profile and that i
Electronics Forum | Mon Jul 17 10:07:39 EDT 2017 | tch
We run our wave pallets through a batch was with chemistry and DI water, they do not come out 100% but they are much better than no washing at all. Water Soluble fluxes come off fairly easily. No clean fluxes are a pain to get off and I haven't been
