Electronics Forum | Wed Apr 04 13:40:22 EDT 2012 | rway
I agree, the only way to "truly" inspect a QFN is with an X-ray. But this might be over-kill for him. He asked about soldering, not inspection. We use QFN's regularly and you can inspect these parts from the side to see if they are soldered. Unfo
Electronics Forum | Mon Apr 02 09:57:18 EDT 2012 | vparis
Our company is having issues with our YesTech F1 AOI machine the programs are currently not utilizing this machine correctly. we are have a false call rates of about 5% to as high as 12% of the total number of inspection points. I have started to rep
Electronics Forum | Mon Apr 02 10:11:58 EDT 2012 | jdumont
Wondering how you guys do this. Scenario: You have to rework a part (small IC or resistor) on a board that has already been conformal coated with acrylic. What do you do with the post soldering residues before you cover it up with fresh coating?
Electronics Forum | Mon Apr 02 17:25:53 EDT 2012 | tombstonesmt
Just PM'd our Pillarhouse Jade Mark II this morning and found excessive solder balls all over the solder pot as well as the bottom of the machine. While removing all the dross it's very obvious that the dross is a REAL fine powder unlike any of the o
Electronics Forum | Tue Apr 03 08:38:34 EDT 2012 | tombstonesmt
Yesterday morning wasn't the first time I noticed this condition. We remove the dross from the pot twice a day and once a week we remove the pump assembly and it still produces this type of dross. I googled this situation and some factors of this par
Electronics Forum | Wed Apr 04 08:55:45 EDT 2012 | tombstonesmt
Dave, *The machine looks to keep a steady 290c (I can confirm) *This problem is machine/product specific. We have three other Pillarhouses that run the same alloy/flux but only run this one product at this station. *The solder does have a "tail" whil
Electronics Forum | Thu Apr 05 11:48:25 EDT 2012 | pbarton
Are you running individual point soldering on each component lead, of are you drawing lines with the solder fountain to increase the speed of the process? Could be that if you are drawing lines, coupled with the very low flux levels you say you are
Electronics Forum | Mon Jun 11 17:47:54 EDT 2012 | tombstonesmt
Pete B *We do lines of soldering @ 10mm/sec *Similar solder balls were present on product after soldering. *UPDATE SOLUTION* We began using topside preheat while fluxing the board to reduce the thermal shock factor in addition to replacing the "fi
Electronics Forum | Tue Apr 03 16:08:23 EDT 2012 | elefu
Just got some Quad 4C's. Need some help. I am setting up a line and have no experience in this at all. This is what I need: 1. Manual for quad4c - this would help greatly. 2. Feeders! 3. Someone who may want to have so phone conversations with a n
Electronics Forum | Mon Apr 09 20:55:46 EDT 2012 | action_101
I forgot to add that we are using a 3 mil stencil. It seems like to me that may be there isn't enough flux left when we reach liquidous?? About half of the solder spheres do melt and wet on each pad, but the top half of each solder joint is just the
