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That was tricky: Hand-made PCB manufacturing

3/26/2012 09:05 PM EDT
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GordonScott
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re: That was tricky: Hand-made PCB manufacturing
GordonScott   5/2/2012 2:27:43 PM
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Apparently the proper names for the tool are 'burin' or 'graver'. http://www.grstools.com/gravers-burs-and-more/ http://www.trackofthewolf.com/List/Item.aspx/1034/1 http://www.ganoksin.com/borisat/nenam/engraving-10-4.htm

GordonScott
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re: That was tricky: Hand-made PCB manufacturing
GordonScott   5/2/2012 1:43:07 PM
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Hm, that boards takes me back a few decades. I used to use a similar technique in the mid 70s, but at that time our standard tool for the job was a hand engraving tool. Not the rotary or vibratory types, just a tiny V-pointed chisel, held in the palm with the forefinger on the top of the blade. It's used with a slight twisting action of the wrist to make the cut. Needs care, because it can lift/tear the copper if you work too hard. You can make your own engraver by recycling a needle file. The shaft should be curved to get a low angle of attack at the surface, so the file needs annealing, bending, hardening then grinding to sharp edges. For quite a few jobs, particularly with SMD parts, just cutting the copper with a scalpel can work. Another technique that works in many circumstances is "dead-bug" construction, where ICs and other 'large' components are glued to the copper, on their backs(*) with their leads uppermost, and the smaller stuff is attached to the leads and/or strung between them. (*) Make sure you know where pin 1 is and which way round to count!

ialexo
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re: That was tricky: Hand-made PCB manufacturing
ialexo   4/3/2012 8:34:35 AM
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Yes you are right. I have friends that does very good PCBs indeed. But...I never mastered the technique when i was younger, so this was not even an option for me! And yes we had no materials to do it (at least in the same day).

Luis Sanchez
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re: That was tricky: Hand-made PCB manufacturing
Luis Sanchez   4/1/2012 4:34:47 AM
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Nice story. Where there's a will there's a way! This board could've been made by masking the copper patterns with ink and bathing the board in solving acid. The unmasked copper is solved this way and vuoala! You'd had you're desired PCB. But perhaps you didn't have the acid at that time. Thanks for sharing!

ReneCardenas
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re: That was tricky: Hand-made PCB manufacturing
ReneCardenas   3/30/2012 9:11:59 PM
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Just of curiosity, can we poll if there are others that have achieved any hobby grade CNC projects that may be worth bragging about. Good bye short high-cost quick-turn PCBs if we can find an effective DIY affordable methods. I have done simple dremel routing, but wonder if it would be worthwhile to implement a simple CNC X-Y table.

ChrisJ555
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re: That was tricky: Hand-made PCB manufacturing
ChrisJ555   3/30/2012 3:54:03 PM
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Classy! We do routed proto PCBs around here out of copper clad, but we use a CNC!

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