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
Electronics Forum | Tue Jun 27 11:16:33 EDT 2000 | Christopher Lampron
Hello Bill, Ioan's idea's are good. One more thing that you may want to consider is using a "Home Plate" aperture on your stencil for the aforementioned caps. The idea is to put a smaller amount of solder paste directly underneath the component. This
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 | Mon Jul 20 17:40:48 EDT 1998 | socheat khun
| Does anyone know why this typically occurs. We have seen capacitors crack due to stressing. Any good solutions? | Regards, | | Steve. Hi steve! Did you check component date-code, reflow profile and component placement height. it has happen to me
Electronics Forum | Mon Dec 02 21:32:34 EST 2002 | davef
Sounds like you're killing the poor little critters. Tell us about: * Placement force. * Reflow method. * Where and how you are measuring your reflow recipe. * Cooling rate of the reflow recipe. * How the solder connection to the metalization appear
Electronics Forum | Mon Mar 08 15:37:41 EST 2004 | pdeuel
What type of P&P machine? Useing any Placement force? Ramp speed in reflow? PCB thickness properly defined? Tooling supports too high? Any doubble stacking of parts? Occuring with only one part manufacturer? Start with processes where problem is note
