Category:PCB Assembly PCB Assembly Service

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In assembly the bare board is populated with electronic components, called a "printed circuit board assembly" (PCBA). In through-hole technology, the component leads are inserted in holes surrounded by conductive pads; In surface-mount technology (SMT), the component is placed on the PCB so that the pins line up with the conductive pads or lands on the surfaces of the PCB.

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Has anybody done any pin in paste job with a dispenser? Reply 2017-03-01 00:20:19
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Nadia

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Morning all,
Has anybody done any pin in paste job with a dispenser? I read somewhere that the needle i.d. should be slightly larger than the hole diameter, but with holes of 1.4 mm I would have to work with a very large needle indeed. How does paste work with such a large needle? Has anybody tried using smaller gauge needles? What kind of dot pattern have you tried? I tried dispensing four large dots on the hole edges with a 0.58 mm needle (obviously you can't just squirt some paste into the hole with a small i.d. needle because it just falls through) and got surprisingly good results but solder beading seemed to be a problem (also due to the component not being designed to pin in paste work, with no proper standoffs). Any ideas?
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John Inlow

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Like this post very much.

cadcae

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A good piece of info for learning.

Avery

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I was really confused, and this answered all my qutoiesns.

minh2611

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Quite useful and impressive info.Thanks for marvelous posting.

Bishop

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I must say you have very interesting posts here.
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