Electronics Forum | Thu Apr 12 10:01:43 EDT 2007 | realchunks
Hi aj, Pete is right, there are several variables that can affect your quality when it comes to stencil design. A good idea is to have a stencil made with various designs incorporated into it. A lot of engineers like the reverse homeplate design.
Electronics Forum | Fri Jun 08 13:49:11 EDT 2007 | ck_the_flip
From my past experience, you can usually get away with OUT the chip wave if your SMD's are no smaller that 0805, and more importantly, there are no SOT23's. A nice, clean, inerted laminar wave (with a little smart or omega help) will solder your S
Electronics Forum | Wed Jul 25 11:55:21 EDT 2007 | ck_the_flip
Zoinks!! Doing the homeplate design on 0402 will actually make your tombstones WORSE! Think about it. Your wetting forces are now on the ENDS of the device with no solder paste toward the middle of the device to tack the part down - a gauranteed f
Electronics Forum | Fri Sep 07 09:13:21 EDT 2007 | smtirl
Folks, we've recently upgraded to Heller MKIII reflow ovens with Gen 9 cooling units. We're running N2 atmosphere at 1000ppm O2 and Kester256 solder paste. We're seeing a big problem with flux residues building up in the cooling section of the
Electronics Forum | Tue Sep 11 22:40:26 EDT 2007 | philip_yam
We are testing SAC paste for thru-hole components in the 2nd reflow process. The solder joint is alright but some problem encountered in FR1 or CAM2 PCB after multiple times of reflow due to the temperature. We are very interested in Zn or Bi-based l
Electronics Forum | Mon Oct 08 18:21:27 EDT 2007 | mariss
We have recently acquired a Passaat SMRO-0406 oven. The manual is uninformative for oven settings. Can someone supply us with starting points for conveyor speed, Zone 1 to 4 and 5 to 8 temperature settings please? Our boards for a product we manufac
Electronics Forum | Fri Dec 07 02:10:26 EST 2007 | mpolak
Hi, Could you guys verify my BTU VIP98N oven settings for lead free process. At the moment as my standard profile im using these settings 140 160 180 207 205 220 257 same temps for bottom and speed 50cm/min. Has anyone got same oven and could
Electronics Forum | Thu Feb 14 07:34:10 EST 2008 | jdumont
How many fell off out of your entire lot? What was the soldering quality like on the ones that didn't fall off (xray, visual)? You need to determine if its a random problem or if even the ones that stayed on are barely on and go from there. If the o
Electronics Forum | Tue Feb 19 14:02:56 EST 2008 | scooter
I have done this in a past life. In my mind this is a step backwards. If all of your parts are placed by hand it will work.You will need to cut at the top of the solder to keep the leads form bending If any parts are auto inserted you will need to c
Electronics Forum | Wed Mar 26 09:32:46 EDT 2008 | nibirta
well i do not know if u fixed this problem already. But i cand share form my experience some info with u. We used a vigon A200 solution for such an application. the cleaner is good. But...it gives u troubles depending on the quantity of flux. It can
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