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Does It Make Sense To Hand Make Printed Circuit Boards?
An anonymous reader writes: A Hackaday author told the hackers that it isn't worth making your own PC boards anymore. Good tools, fast shipping, and cheap manufacturing capacity means that spending a day making a board that is much worse than a 'pro' board just isn't worthwhile anymore. The reaction was worse than when Kirk told the Star Trek fans to get a life. Although there have been some who agree, many of the readers have taken it as an affront to their very way of life.
It doesn't take a day to make a PCB. Show me a place where I can order a PCB and have it in my hand within an hour.
Yes, most times it doesn't make sense any more to make PCBs in house.
Two exceptions : very fast manufacturing is needed, or for hobby use.
But even for hobby, it's better to wait 5-30 days and pay the few euros for the boards.
aaaaaaa
Well, he has got some points... i too hate making my own PCBs (i'm not a young enthusiast anymore).
Most of what i make are only prototypes useful to me only and it is a huge waste of time to:
1) create the layout via software (maybe i also need to create my own components before because i can't find a library with all the ICs/components that i need)
2) go through all the lengthy steps to make a real PCB out of it
3) get rid of the chemicals once done paying attention to not ruin anything (i ruined a whole wall one day when i was a teen at my first attempts...)
There is a good, although a little bit forgot, alternative though... it is called "wire-wrapping".
Yes, it is not as beautiful as a specialized PCB, but if you have the correct wires and tools it becomes quite a fast process.
You don't need to use any software for the layout. Did you f*ck something up? No worries... just unwrap and fix the mistake! It is strong enough to be usable in real-world scenarios.
Of course, if you need to make several copies of your board... then the PCB is the way to go. But if you only need one damn copy or you are just prototyping... then wire-wrapping makes a lot of sense.
Would it be like...
Handwriting a letter? ;)
or...
Sending that letter through the post?
"The reaction was worse than when Kirk told the Star Trek fans to get a life." Really? From what I can tell, it's only a small minority of the commenters who were outraged.
The rest of them seem to agree, and post their experiences with using various custom PCB services, software, etc.
Nope, not worth it by a long shot.
It's fun to try If you want to understand the PCB etch process, or if you absolutely need a PCB right away.
But the results are quite frankly terrible compared to paying $10 for 5 boards from china.
The main issues with home made PCBs is
- Drilling the holes dead center
- No plated through holes.
- 2 layers can be a bitch to align
- No solder mask.
- Side etching of the thin tracks.
- The many many hours of time it takes verses just paying the $10 and waiting 2 weeks.
... the best way for us to learn the basics is to learn by doing. Everyone forgets what its like to start from scratch. When we pontificate from our position of knowledge we often forget the struggle and cost of learning along the way and for us to deny future generations that is stupid.
There is a strong sense of accomplishment if you are able to do things from scratch, or closer to scratch, where you are involved in more of the process. Saying I need a board with this spec to a vender and get an overnight shipping, vs. actually designing it yourself, printing it out.
Efficiency isn't always the goal. Efficiency is boring, because it is about standardizing the process, it is about taking joy out of learning and just focusing on mass production. Building experimenting and learning have value as well. If you make your own board you get a good feel on how things are setup and working, if there is a problem you can more easily diagnose problems, and you really learn what is happening.
Of course if your boss's Business school didn't cover Business ethics in nauseum, like mine did. that may not be the best argument. However you can bring up the efficiency of being able to print multiple per day allowing your development time to increase as you can try multiple versions per day, and the cost of man hours will be less than the cost to of the equipment.
If something is so important that you feel the need to post it on the internet... It probably isn't that important.
I do laser-print on good-quality paper, directly onto photo-resist (no oil, film, etc.) and what takes longest is the exposure and quality is very good. Sure, double-sided or multi-layer or large and complex I would have manufactured fore me, and standard-things like SOP/SSOP adapters I have on stock, they are just so cheap on Ebay. The other alternative for more complicated circuitry is to use transformer wire and proto-boards and I made very good experiences with that for all sorts of circuits.
Still, PCB-making is a valid skill to have in ones toolbox.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
Single side PCB can be made easily with a laserjet printer and a laminator. Doing double side boards and getting proper alignement is a bit more tricky: however if you can do them, through holes are to be soldered by hand. Probably it is wiser to have double-sided boards manifactured somewhere.
However I must say that I seldom make anymore my PCBs: Manhattan-style assembling is very effective for most circuits I build.
The author assumes the goal is to get a working board. Not so, the goal can be to teach yourself and build your own skills. However, an article like this is clickbait and will make a lot of money in ads, so it pays to piss people off and then reap the rewards. Hell, it was just featured on Slashdot, wasn't it?
Shutting down free speech with violence isn't fighting fascism. It IS fascism!
The needs of the few outweigh the mass production for the many.
Just another day in Paradise
This is one of those things that is worth doing once, if only to understand why you don't want to do it again. It's like being able to do calculations without a calculator (or computer). It's important that you understand how to do so, but it makes no sense to do so on a regular basis.
Also in this category: A wise man moves between zero and one pianos in his lifetime.
I've been doing electronics as a hobby for 5 years or so. I'm 27 years old so pretty much the entire time I've been interested in electronics cheap hobby PCB manufacture has been available.
For prototyping, I use breadboard. To be honest the PCB etching has never really appealed. You have to mess around with laser printing, chemical etching, drilling holes, larger track sizes and single side only unless you can do your own PTH. If it's something I really want to keep, but don't want to do a PCB I just transfer it from breadboard to this : http://www.adafruit.com/products/571
At this stage I'm designing circuits to sell with several hundred components on each, so it's easier just to design the circuit in Eagle, do the ERC and DRU checks then forget about it for two weeks while the boards are shipped from China. If I were etching this I would have to do the board layout twice and could encounter different problems on each. It saves my spare time for doing other stuff.
I think the only downside to the PCB from China method is that PCBs larger than 10x10cm become an order of magnitude more expensive. Still, it forces you to really check all your designs properly when you encounter the inevitable horror of receiving a board you designed with incorrect footprints or electrical errors.
He's right, sort of.
I still occasionally make a PCB if I need one quickly. Most low cost board houses will take 4-6 weeks to turn around your board, if I need one for something I'm doing this weekend, I'll hand make it. I started out making 2 layer boards they are nowhere near as hard to make as he says (at least using a toner transfer process - I've never made PCBs using UV/photo processes). I've handmade PCBs using toner transfer for 0.4mm QFP devices.
The real issue for me is I usually want to make 4 layer+ boards with a proper ground and power plane, not only does it make routing vastly easier, but for what I'm doing I end up with a circuit that performs a lot better, too. For those there really isn't a good alternative to going to a factory. Fortunately there are quite a few low cost choices for 4 layer boards now.
Oolite: Elite-like game. For Mac, Linux and Windows
If all I need is one or two boards, I just wire wrap. I have no idea why so few people talk about this in the maker community.
Greed is the root of all evil.
The reaction was worse than when Kirk told the Star Trek fans to get a life.
Shatner surely. It would all be a bit meta for James Kirk to decry Star Trek fans.
1) Learn to use CAD Package
2) Spend two weeks laying out a board using said CAD package when doing the job by hand would take a couple of days
3) Email design to PCB house in China
4) Wait six weeks
.
.
.
.
.
5) Wait in for DHL delivery, driver sticks a card in the mailbox and never rings the bell
6) Go to DHL depot and collect parcel of PCBs
7) Open box to find that you've designed one side of your PCB in mirror image and all your boards are trash
8) GOTO (3)
Or, design on a piece of paper and etch it yourself using ferric chloride.
But he also wrote a more serious column for Car and Driver. He once talked about the decline of American motor cycle industry. Famous names like Indian Chief etc and how they all foundered. Basically they produced machines which were difficult to maintain at good condition. Every three thousand miles people had to disassemble the cylinder head and decarbonize them and reset the valves and timing etc etc. The honchos in the companies were proud their customers like to get their hands dirty, they like working on these engines. Jay Leno said, "no, we don't like messing with these engines. We want to ride and have fun. But it was impossible to get good performance without doing all these things. We were forced to do it because your engines were crappy". When Honda and Yamaha started making reliable machines that delivered good performance for long times without these messy requirements, they just ate the lunch of the old style American motorcycle manufacturers. Only Harley survived, but it was touch and go for even for them.
People like making things that work. Ages ago the only way to do it was to make your own PCB. Now a days with one day turn around, most people would like to outsource making the pcb to make sure there are no accidental contacts, no mistakenly erased and redrawn line not making full contact, making sure all the holes are drilled all the way through and there is no delamination etc. Hand made PCBs are the equivalent of your motorcycle rider decarbonizing the engine head instead of riding fast on the wide open highways of America.
sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
A Hackaday author told the hackers that it isn't worth making your own PCB boards anymore.
FTFY
He uses old school etching.
People in the known, will be using muriatic acid with perroxide hydrogen (both common, and easy to recycle after use).
There are also UV sensitive films that can be applied on the copper with a hair drier. And those are by themselfs etched by caustic soda (another easy to recycle chemical).
But, i'm not an expert, so check your recycling and chemical wasting guidelines in the area you live on.
Downside is you need to prep artwork for where the tracks get cut, but no big deal in Inkscape or the like. And you'd have to create artwork whichever method you use.
It has the additional advantage of drilling the holes spot on, plus you can cut the board to any desired shape.
Doubled-sided boards aren't hard to align - just reference off the holes you've already drilled.
Very thin tracks can be done with a pointed dental burr. You can even go between IC pins with a bit of care and attention. 0.8mm pear-shaped work well. They're very cheap, but HSS versions don't last forever. Also expect to break a few if you try to go too fast - 10mm/min is about the safe limit @ 2500rpm.
If you can't afford a machine up front, join/form a hackerspace. Loads of additional uses for a tabletop CNC as well...
Of course, it's still not as good as a proper PCB, but it's a good option for one-offs or testing out a board before ordering a batch.
(I Used To Be An Embedded Systems Designer)
This is nonsense, we (typically the royal we) could have an idea netted, fabbed, populated (tweezers, paste dispenser and a steady hand) and in front of a software engineer by lunchtime. We had some nice gear like CNC PCB mills, spray etchers and computer controlled re-flow ovens but there is nothing that couldn't be done at home with acetate and a pizza oven.
As an aside, sending stuff out for assembly isn't always a walk in the park, we had some custom dev boards come back from India where they had decided to re-drill all the through-plated holes for the header pins because the ones they had on the self didn't fit. We had to go back and top-solder ~200 pins a board to get them working.
Making your own PCBs makes as much sense as developing your own photos ever did. People do it because they like doing it, to learn, or to mess around with the results for fun/art. No one makes their own PCBs out of necessity or efficiency.
I'm one of the people who reacted negatively to that article and you draw the entire thing in the wrong light. I don't react negatively to someone pointing out the great cost and quality of pre-fab PCB houses. I use them a lot for many projects. However I lost it when I got to the bit which said:
But I never do that anymore. It simply isn’t worth it. You shouldn’t either.
What the heck does this self-important know it all know about my projects and what I should be doing with them? He doesn't know how soon I need them, how big they are. He doesn't know if it's a 1x1" board where the cost of manufacture is dwarfed by shipping costs. He doesn't know if I live in Shenzhen right next to the manufacturer or on a small Pacific island which only gets mail every 2 months.
It is even worse considering the crowd he is pandering to. Hack a day is filled with people who do things because they need something fast, now, just something quick that will work, or need something they can make out of the crap they have lying at home because they couldn't be stuffed going to the store. He even knew this:
Don’t get me wrong. No one that reads Hackaday needs to be told why someone wants to build something even though they could buy it somewhere else. I
.
There is nothing wrong with buying PCB houses if you have a project where it makes financial sense to do so and you're happy to wait 2-6 weeks to get the resulting board. I hate making circuit boards. Yet I still make them myself because the conditions of what I'm doing call for it.
By the way I am writing this from a Surface tablet. I'm not using a desktop right now, and neither should you. What would you think of a Slashdot article like that? Praise the author for his ability to chose something that suits him?
I hew my one-bits out of the living face of Chaos. I thought everybody did that.
"Cock Up Your Beaver" does not mean what you think. This sig is intended to clog filters and annoy do-gooders
The entire point of building your own board (other than the sure joy of learning and building) is to not be subject to the whims of a handful of global manufacturers.
Only an asshat would suggest makers stop making. What the hell
Doesn't anyone wire wrap any more?
Today I spotted a wrapped board in my dad's workshop, he's 88.
Go well
Nobody is keeping a copy and reverse engineering what you're working on. Nope.
... and it's known as time.
You can't do SMD easily with a breadboard.
And you can't have every breakout board at your fingertips with the crazy packages they invent on a daily basis.
Sometimes custome copper is a necessity.
To quit making my own IC's. I just perfected using mini ice cube trays to place the components into and pour in a potting ceramic. Works great!
They just get fewer. A decade or two ago, doing your own PCBs was pretty much a requirement if you wanted to work with PCBs and wire-wrapping or pre-made hole boards were not cutting it for you. Today, for most applications you can easily and rather cheaply buy PCBs that are usually superior in quality and also usually more likely to work as designed.
There are a few reasons I still do my own PCBs from time to time. Mind you, the applications get fewer and I think the last time I actually etched one has been at least 6 months ago.
- You wanna.
Always a good reason. You want to do it because it's for something special, maybe a gift or something where hand made from start to finish actually means something. Sentimental value and all that. Also, it's fun. At least the first couple dozen times, then it just gets boring.
- Security/secrecy reasons. ;)
There are always those designs you can't give to someone else. This is less a concern for most people, but there are applications where I certainly wouldn't want the design to go to some Chinese company before I can present it at the next Security Conference. Because I wanna make the speech.
- Time ...
Yes, overnight is possible. Expensive (around here overnight costs upwards of 50 bucks for a simple PCB), but possible. Still sometimes too slow if you need it NOW. Or if you can't wait the 4-6 weeks that the budget price could get you. Because
- Some designs can only be tested on a PCB
Especially touch designs are extremely hard to test sensibly on a breadboard because their behaviour depends highly on the layout of the PCB. Other times you're running into timing issues if you're working with very fast switching signals. Breadboards simply don't cut it with all applications you may encounter. More and more "modern" designs (wireless devices, PC components, etc) can hardly be remodeled on breadboards.
As soon as the design is done and I need a batch of PCBs, there is no question about whether I want to do them myself or whether I want them to be done by someone who can crank out a few dozen per batch. Designing can actually still mean etching your own. Not as much as it used to, but there are still applications that give you an excuse to indulge in your rubber glove fetish.
We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
The beer-free tools for PCB creation have become incredibly good recently, with the exception of autorouting which is still not so great at the inexpensive end of the market.
Small-quantity PCB services are ridiculously inexpensive at often only a few dollars per board, delivered.
Component pitch has shrunk to the point that making fine lines for most chips is really hard with hobbyist etching tools. Forget vias.
So when are DIY PCBs useful? Maybe with single-sided surface mount boards that have medium-pitch components when board quality isn't so important, and you need it in hours, not days-to-weeks.
When does that happen? Never, for me. Really, never.
Add in the storage and surface areas required for the chemicals and processing, the setup/cleanup time, the toxicity of the chemicals, and there's a very good reason I have not ever, not once, even considered making my own PCB.
When I need to prototype circuits, point-to-point works really well, and using SMT adapters that are also ridiculously inexpensive. And even then, the battles you have to wage with noise coupled with the really inexpensive costs of professionally-made boards make it almost not worth constructing point-to-point (and in my experience, breadboards universally suck).
So should you make your own PCBs? If the making of the PCB isn't an end until itself for the pleasure of constructing the board, then the answer is, "no." If you like playing with resist layers, electroetch, and stuff like that, then sure. I mean, you could wind your own resistors, too, if you really wanted to. And there's a fellow who makes his own tubes, too (he's amazing, and I admire the skill). But buy your PCBs, don't make them.
Put my fist through my alarm clock with its ding-dong death inside my ear. - The Blackjacks.
Privacy is constantly under attack. Unless you want your name, address, phone number, purchasing history, etc. etc. in some database that will be farmed by some government 3 letter agency, then you have all the reason in the world to make your own boards.
There are lots of people that would be willing to pay YOU to make boards for them as long as it was paid in cash and Anonymous, just to avoid those abuses.
Making your own circuitboards is almost never the best option. But making your own cloth with a hand loom is almost never the best option either, and people do that for fun all the time. If you're taking advice from a Hackaday author, you're probably a hobbyist, and you can hobby however you want to.
Does it make sense? Not really. As the HaD author pointed out: creating your own boards is more hazardous, offers fewer options for multilayer boards, and is less precise.
On the other hand, we are talking about HaD. If the point was to get a device that does what we want of it, we could buy almost anything off the shelf and sites like HaD would have very little rational for existence. More critically the environment of learning, creativity, independence, and (insert your motivation to make/hack/DIY) would have very little rationale.
Ha! I didn't read the article, but I have my opinions too. I call BS. These articles pop up now and again. As technologists, DIYers, and Hobbyists, there are all varying degrees of need. I make double-sided PCBs at home in my basement because I can do it in 2 hours. Sure, it's not going to look great, but I'm not selling the thing. I'm making it for myself. Just like J.G. Wentworth: It's my PCB, and I want it now. I don't want to wait 1 or 2 weeks, and I definitely don't want to spend $20 on something that I could do for $2.
Plus...there's an art to this process. It's not hard, but it does require some experimentation. I'm proud of myself for knowing that I can do it.
These little boogers are handy. I don't like wire wrap any more; just get me a way to mount all the SMT chips on little boards connected with wire....
I don't do much of this anymore, but I have designed hundreds of commercial boards and likely into the thousands of prototypes.
In the late 90's people used routers and crude lithographic techniques; these got better, but the online services scale nicely, and if you add up all the costs, it's almost insane to try and do it yourself. Why?
For entertainment purposes - that's different - but there hasn't been a commercial case for some time.
In fact, they're so cheap now, what hands on work I do, I just spin a PCB even for prototype purposes.
..don't panic
In engineering, the answer is _always_:
It depends....
If I only need a few, they are fairly simple, and they are 'blocking' my critical task... it is ALWAYS faster to make them myself and be done vice spend days running thru the purchasing department's crap procedures.
Also, if you count the people who are also 'blocked' waiting on the boards... it is WAY CHEAPER for me to make them too. No matter what my hourly rate is.
if I need a medium volume of the boards... sure, outsource them.... and production? I would never let a hand-made board leave the loadingdock for delivery to a customer.
My 2 cents...
Look at hot-rodders. Does it make sense to rebuild and blueprint a1939 flathead v8? No. It makes absolutely no sense at all. Yet people do it. Because it is their passion. Does it make sense to spend $600-$1000 building a custom water cooling loop on my home pc? Nope. I still do it though.
This will be the next front of "authenticity" among hipster makers.
Hipster makers will have been making their own boards since before making your own boards was cool.
Be able to understand - learning has value. If you want someone to masterfully understand computers, have them make one from scratch.
Economics - if nobody makes them, then the vendors prices will go up and the quality will go down.
IMHO, one big missing piece to ultra-short-run production of electronic products is the ability for a DIYer to make production-quality enclosures in small quantities that aren't stupid expensive. I had (and still have) high hopes for 3D printing to solve this but current technology is slow and prone to mid-print failures. Plus, the results are lacking in appearance of a finished product.
How about the various circuit printers that are coming on the market now, like the Argentum or the Voltera? They're not cheap ($1500-2000), but they're probably a lot faster/cleaner/more precise than trying to etch it yourself. Voltera is capable of printing pseudo two-layer PCBs, since it has both a conductive solderable ink, and an insulating ink ink: when a trace needs to cross another, it uses the insulating ink to create a bridge, and then prints the second trace crossing over the first.
Its quite easy with Protomat (LPKF) and also, if one assumes that he makes not only protos but also "test runs" lets say 5..20 units, Protomat is very useful for patching factory-pcbs.
Double sided ? I have used fine soldered wires instead of the conductive glue and other junk. And actually, it takes only 30 minutes to add jumper wires (vias) to medium sized board.
So, if you can afford, Protomat is good. But dont use anything without tool magazine. Because then you have to babysit the machine and its horribly boring. Otherwise, leaving Protomat to mill a pcb for 2-4 hours is no problem, when you have experience. And the only babysitting needed is flipping the board for milling reverse side. They have a conductive epoxy for filling vias too, but its quite limited and fragile, although its usable in some situations (havent used it for many years but it has saved me sometimes in the past)
But anything which involves chemistry... NO and if you hope to make vias in home, then NO NO NO. Its either absurdly expensive (LPKF via plating) or very messy and hard to maintain and chemicals will have limited lifetime. Or both. Of course, its fun to try etching and plating but if you need a pcb fast, then dont mess with chemistry !
I happen to own small PCB factory, and we have full-time chemistry engineer taking care of solutions. Hard and expensive work, nothing hobbyist-grade there !
Ok, Sr PCB Designer here... 23 years in the industry. for ANY company no of course it doesn't makes sense and the bennies from a fabricated board are always going to outweigh doing a handjob. Even a 2-4 layer protomat style quick job is better than a hand etched board.
for a hobbyist the ACT of making one themselves is as important as the end product. It's about doing it all themselves.. Hell I have done them by hand myself because *I* wanted to make the board not send out Gerbs and have it show up on my doorstep 3-4 days later.
Does it make sense for TFA to post a link to some good PCB printing online services?
But I see the factor of a delay as less of a matter of whether or not one *NEEDS* to have it done quickly and more simply a matter of whether getting it done right away is simply something that they might *want*.
But what would bother me a lot is if people didn't have a choice... or if any so-called choice was actually a non-issue because only one of the options is actually both practical and readily available to them.
File under 'M' for 'Manic ranting'
The guy who said this seems to be disconnected from the "maker" world. Amateurs make stuff in the full knowledge that it would be cheaper and faster to buy a ready-made pruduct that would (probably) have more features, be more reliable, DEFINITELY have a better quality enclosure and in all likelyhood be smaller, too.
But that's not the point. Amateurs make stuff: electronics and software because they like it. They know that there are alternatives that are better but there's no fun in that. There's no satisfaction in the knowledge that something is your own work, possibly your own design and in the true spirit of ameteur-ism, completely undocumented and an utter mystery to anyone else who would ever try to work out what it does, or how it does it.
politicians are like babies' nappies: they should both be changed regularly and for the same reasons
Look at all the super low member numbers in this thread....
We are showing our age boys!
I'm actually running out of 70/30 BTW.
Another consultant who stuck it out.
"We are the Priests, of the Temples of Syrinx..."
I use their board service and their software and it works great for my little project boards. I can work something up over the weekend, get my order in on Monday, and by Friday I have my boards.
http://www.expresspcb.com/
I haven't used them in a while but when I checked their link it looks like they updated the software so I will have to check that out.
One of the Tech Crunch 2015 winners was Voltara V-One. Target price is sub-$2k (eventually) for a machine that will do 2-layer PCB printing, insulation curing, solder paste dispensing and reflow. Might be expensive for the home user, but I can see Maker workshops installing them.
It's not even the first PCB printer, there are several on the market already in the $3K range.
No thanks, but I'm not handing anything off to China given their predisposition to copy anything you hand them - and make their own knockoff.
Twitter supports and protects racists - by smearing their critics with the "Hate Speech" label.
In my experience, it's kind of fun to start off making a few PCBs and wire-wrap boards - I learned a lot by doing it. After a while I got tired of it and only do it occasionally, but now usually do breadboard>proto-board/wire-wrap>PCB house. I'll sometimes substitute a home-made PCB (sometimes just a few discrete modules to plug in) for the proto/wire-wrap if the layout is too messy otherwise.
I wouldn't knock it - it's kinds fun to make artistic traces and make the board itself a functional work of art.
If you want to give your prototypes away to whomever is going to produce your board, by all means, eliminate the need for corporate espionage by publishing your work.
If you aren't learning it, 'hands-on', then you're not really soaking the concepts into your brain.
Calculus– Use pencil and paper. Lots of paper.
Circuits –Yes, bread-boarding is fine, but when you want to prototype, tightly integrating the components, w/soldered connections, then you should go through the process and do it for yourself. At least once.
The cost of doing it by hand adds up quickly. You can get per board costs so low that just to buy the chemicals and equipment can easily be 5x.
In these days, constructing a homemade circuit board is a relatively simple and straightforward task. With some basic tools and a few hours to spare, anyone can build their own circuit board. see here: http://www.syspcb.com/News/329.htm
But if your PCB is for business use, not just for hobby, get PCBs from PCB manufacturers is a better idea.
Like a lot of questions, it all depends.
If you are more interested in the results and have the time needed, and the money, then ordering circuit boards is now reasonable to be considered. But there are many things to consider. Making your own, if you can do it reliably and quickly, can definately be good.
Particularly, if the order has a minimum quantity and you need more testing to be sure you will not have to throw them away! Like I had to once, when prices were $400 each for minimum 100. 8-(