Electronics Forum | Wed Dec 15 05:15:46 EST 1999 | Marlies Hanf
Hi. Can someone explain to me what coplanarity is? There are a few rather irritating and contradictory definitions of that term. When leads are coplanar - what are they then? Are they parallel to each other or not? Thanks, Marlies
Electronics Forum | Sat Mar 18 11:59:34 EDT 2017 | jchris
There are a few companies out there that manufacture lead forming/re-forming equipment. The equipment can effectively straighten the most bent-up leads. Fancort Industries is one of them, another is Hepco.
Electronics Forum | Thu Mar 02 13:59:38 EST 2017 | horchak
Slim chance it's the nature of the beast if in original unopened package. If handled by anybody not properly trained they will get bent. Allso make sure your pick and place is seating them into the paste, any lead not contacting the wet paste will be
Electronics Forum | Thu Mar 02 12:08:59 EST 2017 | rvines1
We usually receive them in batches of a few hundred, and occasionally from catalog vendors like Mouser. Inspection has been inconclusive. They don't have to be bent much to cause a problem. I'm wondering if it's just the nature of the beast.
Electronics Forum | Thu Mar 02 10:09:02 EST 2017 | rvines1
We have a board with an LQFP-176 with 0.5mm pitch. We regularly have to rework these due to unsoldered pins, which is due to pins that are slightly bent upward. We believe that we are receiving them this way, but it may also be due to handling on o
Electronics Forum | Sat Mar 04 13:28:53 EST 2017 | ttheis
Could also be the leads catching on the feeder or tray during pick-up. I just had a feeder catching the edge of a lead as the part was picked causing the part to shift and be rejected at severe rates.
Electronics Forum | Thu Mar 02 10:46:34 EST 2017 | Rob
Hi Rick, we have seen this issue before with small volume and prototype parts coming in from catalogue suppliers, where they are decanted from the original manufacturers packaging and sold in smaller batches. Also after going out for programming.
Electronics Forum | Tue Apr 11 06:35:12 EDT 2017 | proy
We have received partial trays from Mouser where they put foam over the tray taped tightly, but THIS IS NOT GOOG ENOUGH they must include TWO trays to keep the parts captive and safe. Just went through this with a customer supplied kit, and have star
Electronics Forum | Wed Dec 15 07:03:09 EST 1999 | Chris May
Marlies, The IPC definition, which I think we can trust, says that Coplanarity is defined as lying or acting in the same plane. In other words Coplanarity means no bent legs, pins. Regards, Chris.
Electronics Forum | Fri Dec 17 15:11:34 EST 1999 | Alvin Kevichusa
Let's look at it this way... Imagine a multileaded component sitting on a flat surface. If all the leads touch the flat surface, they are all in the same plane (that of the flat surface) and are coplanar. Coplanarity is desirable because if a lead is
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