Electronics Forum: solder a (Page 161 of 1484)

Can you wave solder this part

Electronics Forum | Fri Aug 25 09:15:43 EDT 2006 | russ

We use a single large pad on board and reduce stencil aperture 50%. If you mask/reduce the thermal pad the solder will not wet out to edges and you will still see the part standoff with the open joints. the purpose of reduction is to wet the paste

Wave solder joint on PTH part

Electronics Forum | Mon Jan 15 13:31:11 EST 2007 | John S.

Since it is in a pallet, I would be sure the preheat temperature is correct across the entire assembly. We've seen large temperatue delta's across assemblies that are soldered in pallets. Could be overheated even or contact time too long. Interest

When to trash the solder paste

Electronics Forum | Fri Aug 03 14:44:36 EDT 2007 | rpadilla

Depends on the manufacturer of the paste... Rosin-based-flux solder paste usually takes 12-24hr's to fully oxidize with open containers. Water-based flux usually is 3-12hr's, but some have a 24hr open container shelf life... However, uncertain unt

how to remove solder ball on PCB

Electronics Forum | Tue Sep 23 14:13:29 EDT 2008 | slthomas

In piggy back on Chunks' comments, what you might wipe it with can be the problem. Alcohol absorbed by the solder paste inhibits the effectiveness of some cleaning chemistries, and driving it into the nooks and crannies exacerbates the problem. If

Black color solder wetting after reflow

Electronics Forum | Tue May 03 20:01:24 EDT 2011 | city4497s

It a recent occurance and it happen randomly on other area. I'm using senju M705-GRN360-KV and Indium SMQ 90 Leadfree solder paste, we have been using both paste for 4~5 years. We have asked the oven supplier to perform maintenance and inspection, pr

Using an AOI for TH solder checks

Electronics Forum | Wed Aug 07 16:06:26 EDT 2013 | rway

What type of filtering are you using? Your solder inspection should be using Histogram Inspection as the Decision and red filter for preprocess. Make sure your settings are correct and check your binarized image under Histogram setup. you should s

Using an AOI for TH solder checks

Electronics Forum | Thu Aug 08 15:59:49 EDT 2013 | rway

What version of sw do you have? What operating system? I don't think you are referring to filtering when you discuss "red and white." You're talking about the light source. You should have RGB filtering under "Preprocess" in your "Edit Solder Param

Re: Cost of solder joint rework

Electronics Forum | Fri Jun 02 16:30:42 EDT 2000 | Michael Parker

I found a reference to Cost of Conversion earlier this year. Basically, the average cost to convert a single component from raw materials to assembled goods is $.08, just after pick and place. After placement and before reflow, repair (solder paste r

Lead contamination in wave solder pot...

Electronics Forum | Wed Oct 12 11:19:46 EDT 2005 | patrickbruneel

Yeah, adopting is the right word. In this new lead-free era spec.'s are made to stay within the scoop of the RoHS directive. The driving force for spec.'s should be reliability. Did you see any impurity level spec.'s yet in wave soldering for Cu, Au,

mask align on liquid solder mask

Electronics Forum | Mon Apr 18 14:58:36 EDT 2005 | halal

I have checked the links that you and Will gave to me. I have new info about my task: The task is to summarize the mask aligning methods. The first method: The factory already has an UV machine for the exposure, so they search some positions with a


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