this is my first post in this forum, but sometimes I visit it to get some news. Now we have an issue and I need your advice.
Few months ago we were awarded with a project that use PTH components. We solder these components on Wave soldering process, but we have a lot of short circuits - more than 20%. This is not the first project with PTH components, but this is the first one with 1.27mm pitch between the leads of the components. Because Customer do not allow us to do rework, we have to scrap all the modules with this defect. Components has 4 leads with pitch 1.27mm between. the leads. We try a lot of different changes in process to reduce shorts, but without success - we have play with wave soldering process parameters, we shorten the length of the component's leads etc. I would like to ask you, if somebody has such kind of issue and already solve it to give me some advice how to proceed.
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