Electronics Forum | Fri Jun 20 11:05:53 EDT 2003 | russ
Why don't you give us the full process along with your delta T for the wave (final preheat temp to wave contact temp). Don't forget de-paneling, ICT, and other things. It could be from the supplier, but it usually is from excessive placement force
Electronics Forum | Thu Aug 19 08:36:37 EDT 2004 | Art
If you have the placement feedback enabled this should not be an issue. Are all of these parts from the same supplier? If so who is it? We are currently having a very simular issue.
Electronics Forum | Wed Aug 31 11:40:24 EDT 2005 | stepheniii
I just had a "how could I have forgotten" moment. By any chance are these double sided boards and the cracked components are on the fist side? If so support pin placement could be the problem. In case more info would be good.
Electronics Forum | Wed Mar 01 12:28:48 EST 2006 | Chunks
Round cracks that look like it's from a placement are generally from a too big Delta T in wave (been there done that). All other cracks are anomalies. Ya gotta see it find it.
Electronics Forum | Thu Aug 28 02:51:01 EDT 2014 | padawanlinuxero
When you say "selecting correct value of the small chip components during assembly", you are referring to caps and resistors? and that you want to know that the correct cap or resistor was place in the correct location? your assembly is surface moun
Electronics Forum | Tue May 07 07:55:33 EDT 2002 | Sir Alexandr
Our SMTproduction has next troubles : 1. irregular 0603-components in tapes (different solder shapes) makes vision errors on placement devices 2. big solder amounts makes pickup and placing errors 3. some tapes delivery delays , so production halts f
Electronics Forum | Wed Nov 27 07:34:44 EST 2019 | oxygensmd
My experience is that capacitors cause more problem as resistors. Mostly the problem is that the solder legs not flat, more like a surface with radius. If you use smaller nozzle which can catch the capitors between the two legs, the placement accura
Electronics Forum | Wed Mar 25 17:11:20 EST 1998 | Mcox
| We are having some problems with "drawbridging" on 0805 film capacitors. | We have already reduced the pad width from .050" to .040" based on input | from vendor. Defects appear to be random as far as location on the PWB and direction | of placem
Electronics Forum | Wed Feb 23 16:38:41 EST 2000 | Michael Parker
I have experienced tombstone with one brand of 0603 capacitor. Swapping in another brand (actually two different brands to date) has stopped the tombstone. I have measured the parts (length, width and height). There does not appear to be any apprecia
Electronics Forum | Sat Oct 28 08:41:37 EDT 2000 | Aaron
1. Check printing accuracy. 2. Check placement accuracy. 3. Your components should be kept in a good environment to prevent oxidation of terminations. 4. Pads pattern should be designed according to standards. If 1.2. are okay, you should suspect 3
