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Selective Solder Recommendations

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Selective Solder Recommendations | 28 June, 2008

Does anyone have success / recommendations for any specific make / model of a selective solder machine. What should I look at? This will be used in a lead free application.

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Selective Solder Recommendations | 28 June, 2008

I have a steckfuss pinpointer 18 you can buy in Toronto, loaded with lead free alloy. peter08 at broy dot com It is not mine, but belongs to a broker and is in my building, will be inexpensive.

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Selective Solder Recommendations | 30 June, 2008

Thanks but I did not want to hear about the one you got rid of. What did you keep?

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Selective Solder Recommendations | 30 June, 2008

I only have it here as a storage favour, have never run it. For lead free, I made a 2nd pot for my wave solder identical and we switch when required. Pete

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Selective Solder Recommendations | 30 June, 2008

Hi Dave,

I am not a sales person pushing my wares here, just my engineering experiences - so I hope I am not out of line here on this forum anymore.

When it comes to selective or spot soldering - it all depends on your board design. Many people already have a design and then pick out a machine. This is the difficult way to go, but seems to be the way things are. If so, you need to determine your closest thru hole to surface mount part and find a machine that can reliably perform this process. In our case, we actually designed or own nozzle for our machine. It worked so well that the company that made the machine put it in their standard nozzles to select from.

Now you could always design your board for the machine you like, which is the way to go. Some things to look out for are dross build up. Look for a machine that uses nitro to keep this at a minimum. On this same subject, look out for very small nozzles or static pots. dross build up WILL occur no matter what sales guy tells you otherwise. it will clog the nozzle or static pot, so be ready to have an operator or maint person do daily or shift PMs to keep this clean. Again it depends on your design.

Delta-T is another area of concern. While looking at machines bring your profiler. Top side wetting will be an issue on larger parts. Some machine actually over look pre-heaters (?). Again it will depend on your design.

Flux application is another area to look out for. Selective solder is molten solder. Flux is a spray. You will probably have some flux left on your board that the solder does not get off. Make sure your mood based quality people are ready for this, as it will look different than a wave solder board.

Finally, time is a key factor. Selective solder can be slow. Be ready with some actual times to let your key focused managerial team know - as they think all new equipment is supposed to faster.

There are probably a few other things we could dive into - but without knowing your product, or actually trying to sell you something, I will sit back and await to see what transpires.

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Selective Solder Recommendations | 1 July, 2008

I do not know if you want selective wave soldering or selective point soldering?

If you have good budget say, less than US$200k Vitronics is best for wave selective soldering. However, if you have low budget say less than US$100K I suggest ACE or KISS 104.

For point selective soldering,Japan Unix is the first thing that comes out of my mind.


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Selective Solder Recommendations | 2 July, 2008

Thanks Real Chunks.

We currently have an RPS opus selective solder machine that we plan on keeping. It is configured as a 3-nozzle (!) one-pump (!!) point selective solder machine w/ nitrogen preheat. Custom wet nozzles. We use lead free SN100C solder and AIM 263UR flux (sprayed lightly). Our gold zebra strip contacts are good with this flux residue and overspray (took a while to find what works). This flux also has proven to not cause the pump to dross up prematurely. They don't tell you that the flux will -drastically- change how quickly the pump dross up.

Currently we manufacturer around 20 different circuit boards that go through the selective solder machine, most on a pallet system. Most have tight spaces that are not ideal for a larger nozzle. I believe our nozzles we have used range from 0.8 to 1.2 in (ID) diameter.

So far, I am in the initial look stage. I like the look of the Juki 400/450 because of the idea of a mini wave plus point soldering. It would help with one of our heavily run boards. While cute my initial gut reaction is probably too expensive. I will also review other RPS machines.

I am looking for other selective solder machines that people have a good maintenance record on and is flexible and fast.

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Selective Solder Recommendations | 2 July, 2008

Thank you Grayman.

We use selective point now but I believe our throughput will be increased with a selective wave system on one of the two main boards we run.

I will see if I can pull up slicks / more information on the machines you recommended.

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