Step 12: Replace The Grey Valve Cover

Put back on the grey valve cover before putting the pump back in the case.
<p>Both valves only pump out air before that. There's no suction coming from any part of the device before doing that.</p>
Is there some reason that just sticking the hose on the other hose bib wouldn't work, rather than opening it up to adjust the mechanism to pump the other direction?
Both valves only pump out air before that. There's no suction coming from any part of the device before doing that.
<p>That hole at the bottom of the pump or rather intention with three openings on the side is where the air is sucked in actually.<br><br>One the second pump it is covered up by a small round felt filter. On the first pump that part is missing.<br><br>Would it be possible to find something to fit in that hole and downsize it to create a pipe with a small enough diameter to create the sunction as well?</p>
<p>Ebay has hi-temp suction pens for SMS/SMT desoldered components removal for &lt;$5. If more suction &gt;20 inHg is needed a used nebulizer compressor can be had for $20-30 no suction cup needed just use the flat end of the hose. For heavy items use a 3&quot; rubberize plastic suction cup, see Harbor Freight.com with drilled hole to attach vacuum hose and Goop to seal the connection for about 65 lbs of pulling power.</p><p>Geek1945 Radar &amp; Computer since 1965</p>
<p>Very cool. I think I might use this idea without switching the pump to make a pen to clean computer parts (like a can of compressed air, but a lot cheaper)</p>
<p>Good one</p>
Great instructable. <br> <br>My one suggestion: you might mention in step 9 that the blue covers also need to flip 180 degrees from their original position. It does not seem to work unless the gaskets and the blue valves are flipped. <br>This may be confusing for users since the blue valves are keyed to fit over the gasket pin, but they fit almost perfectly 180 degrees due to a small cutout on the backside. <br>I think that's why people are getting mixed results. Flip both gasket and blue valve cover, and the vacuum is quite strong. Also, your pic shows it correctly positioned, it's just not called out in the text. <br>Great write up and pics, and extra credit for making this out of a super cheap Walmart device that is very easy to obtain!
I attempted to modify the dual pump. The motor still works but there is very little suction. When I put the hose in water, it does not bubble or vacuum. I followed the steps carefully. I took it apart an reassembled it to make sure I had done it right. Any idea why it did not work? The pump cost less than 10 dollars so it is not a big expense, but I am very interested in a vacuum pick up tool that is less than $50 - $100. I am assembling a lot of boards and it would come in handy.
So I've tried this several times now and seem to screw it up every other time where I'm not getting any suction or blowing. Usually the case is I've gotten one of the two valves upside down. It's just a matter of trial and error to figure out which one. Try flipping one and see what happens. If it starts blowing after that open it back up and flip them both. If it's not that then it is something new to me.
Love It. Awesome Job! Thanks for the instructable.
For anyone wondering, the first thing I did after making this (with the aquaculture pump) was hook it up to a long piece of aquarium tubing and stick it in a bucket of water. It pulled a column of water about 8 feet high and held it there, which works out to about 240 millibar. Hooking it up to both ports made no difference whatsoever in the vacuum pressure (pretty much expected), but did increase the speed of the air flow by quite a bit (let's see...about double? Shocking!) Not too bad for a little aquarium pump.
Never thought about this.Gonna make this for sure.Great Instructable.
wouldn't it be simpler to just reverse the polarity or can't you
No, it's about the gasket directions. The diaphragms just vibrate back and forth to pump the air. The gasket is what decides if air is going in or going out when when the diaphragm is pumping. One direction closes it to air going out and the other direction closes it to air going in.
Voted. <br>Good idea, and instructable, went to my Blog: <br>http://faz-voce-mesmo.blogspot.pt/2013/01/modi-bots-algo-de-importante-e-um.html
When the surgeon says, &quot;More suction, nurse&quot; I bet that device costs a couple grand.
Picking up tiny beads would seem to only call for a small vacuum force; using bigger pumps might make no sense. At some point you just need a coneshaped nozzle for a ShopVac.
That was an exceptionally well written instructable. Many people will place a couple of images, a vague description... but yours is very well written, clear, and the images are very well thought out. <br> <br>Great job!
I would think that adding a jar in the middle like a catch basin would prevent debris from going into the mechanism and make item retrieval much easier.
I made something like this a while ago- the jar idea works very well, especially if you place a bit of filter cloth over the tube leading from the jar to the pump :)
This is a good tool, well described. If you made the pick needle project a little more, then you could reach into tiny crevices to rrtrieve your tiney parts. Not saying that you lose things in tihy crevices, but I sure do.
Yeah. Since posting I've seen other people use syringe needles, which I didn't think of. If you needed a finer tip, that would seem like the easy way to go.
Extremely well done! Very clear and understandable. It makes me want to make one - you made it look easy and explained it well.
This is a great idea, the main limitation of the pump, is the design of the pump, or more or less, how much air remains in the pumping chamber, on it's exhaust stroke, as a ratio of it's overall displacement...<br> <br> This does not include issues such as valve sealing, motor power etc...<br> <br> So it's not the &quot;size&quot; of the pump - that rating it based upon the amount of air, that it can feed into an aquarium, to oxygenate the average population of fish, for that size tank.<br> <br> The easiest way to get an idea on this, and because the very dense liquid metal - mercury - is hard to get,so you need a much greater height in your column of water, is to hang some air hose, out the window of a 2 or 3 story building, and into a bucket of water, and then hook your &quot;vacuum&quot; pump up to that.<br> <br> Because I tend to calibrate restricted manometers, where the water will not get sucked into the device, doing the sucking, I have no real idea of what the pump is capable of pulling in the way of a partial vacuum, and how high it will lift the water.<br> <br> But the vertical height of the water column, will show you exactly how much the partial vacuum is, and the only difference between a 'small pump&quot; and a large pump, is how much FLOW it is capable of - and not how high a pressure / vacuum it will develop.<br> <br> Tips: Mercury is better because 1) it doesn't evaporate 2) water has a density 13.6 times lower than mercury, so for some applications the size of the manometer would have to be very large.<br> <br> The best write up on them. http://www.engineeringtoolbox.com/u-tube-manometer-d_611.html
I like yours, it's very tidy and professional looking :) <br> <br>I did something similar in concept a while back, but simply drilled a small hole in the pen body, which I covered with my finger when I wanted it 'on' and didn't when I wanted it 'off', and half-covered for weaker pressure. I added a tiny clear screw-top plastic container with some fine filter cloth inline on the air tube (terrible diagram attached) both to stop dust gunking the motor, and so I could unscrew the pen tip, and use the setup as a micro-vacuum, for collecting spilt beads etc, or just cleaning dust out of small spaces. <br> <br>I had two pumps, one unmodiifed, and somehow attached the tube to the 'blower' rather than the 'sucker'... when I'd last used it to suck up metallic powder excess, and not emptied the canister :D *grins* sparkly..everything... -_- <br> <br>A small dab of silicone sealant mixed 5:1with cornflour makes a decent cheapo sucker-end (just formed around something thr right size, then pulled off after it had set), and a wide hollow needle (such as from a syringe) works as a non-sucker tip, (I didn't have a filling valve anywhere)... the spare tip/adjusters from a cheapo lighter fluid tin look like they might've been an acceptable substitute too :D <br> <br>My one is very, very ugly, but I only wound up paying for the pump and air tube :)
This jar idea is so simple, very nice DIY vacuum canister!
This is by far the most highly detailed and clearly described instructable I seen. Incredible job. And very very useful gadget. It is ideal for cleaning computer keyboards. <br>One question; if the gaskets can be used against each other to punch the hole, can they simply be switched? I'm sure if they could be, you would have done it, but it's the only part of this beautiful inst. I wasn't sure of.
No. It's the same parts on each side. One side is just upside down from the other. I just flipped them over the top of each other to get the distance right because I didn't want to have to measure with a ruler. And even then I couldn't get it perfectly lined up and had to measure to see if the left/right measurement was even. But it got me the distance down from the edge of the circle at least. A mechanical pencil does the job pretty well and the initial hole is probably not a big deal if you screw it up by a little.
Ouch! That would hurt your finger.
awesome thank u so much
do you think this would work well for sucking solder away when desoldering stuff as long as you put a filter to catch the bits
I'd say chances of it working as a solder suction tool are slim. I've converted a pump myself some time ago (a different, even more crude pump tho) and measured its vacuum head to be only about 5-7 inches of <strong>water </strong>(not mercury!) In other words, it's very-very low for readers not familiar with the frame of reference. It's more than enough to hold parts with a suction tool, even larger parts (I've used it with TSOP48 memory chips, worked very nice) but it would not&nbsp; suck a molten heavy metal like tin/bismuth alloys anywhere far, and even if it did, it would be so slow that it would solidify before it can pass the nozzle. Additionally, suction soldering station generate not only good negative pressure but they move quite a bit of air, too - aquarium pumps move hardly any air at all.<br> <br> So, anyway, these converted pumps are very useful for pick-n-place projects but you better off buying a soldering station with suction or simply get a better hang of using a spring-loaded suction tool for de-soldering parts.
Potentially yes. I wouldn't want to use the pen made in this case for it as I would think it would clog really easy with too many edges to catch solder inside the pen. I tried it out using another pen I threw together without the needle and it was able to suck up the solder, but not that easily compared to a spring loaded desoldering pump. Also it got about one use before the tip of the pen got clogged and I wasn't able to get the solder out of the tip because there's a bunch of little ridges inside it's clinging to now. So possible yes, but convenient or easier, I'm not so sure.
I just converted over my whisper pump which is rated for 100 gallon tank and it has better suction, though I'm still not sure enough to do this. I'm going to test at some point here if I hook both of them together if I get a lot more suction or just some. There's also some pumps out there rated for 300 gallons, but I'm not sure what the parts inside those look like, or again at their price points if it's at all worth it.
an old fridge pump works well to clean solder out tape pipe in players heat up solder melts
Wouldn't that be a little overkill?
A tapered glass, like an eyedropper, would work as a solder sucker. Just put a cigarette filter in it to keep the molten solder from getting up into the pump or tubing. You will need to replace the filter fairly often if you are doing a lot of desoldering. Flux fumes will also get up into the pump and solidify causing the pump to jam up, so you need to also clean out the pump too.

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Bio: I'm a 3D technical artist in the game industry as my main profession. This means making rigs for characters (Think like animatronics but all ... More »
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