micro compressor, the final attempt

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chinnerz
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Tue Mar 30, 2010 5:19 pm

i have been mucking around with those cheapo micro compressors for a while now, and i think i may have isolated the issue i find with them. the motor is crap. i have decided that because i can push harder than any motor of that size (i think) i am going to try (if i can) to attach a manual hand crank, instead of having a motor.

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probably the only issue i will have is how do i do it so it doesn't fall apart within a few pumps...

any ideas, comments, criticisms before i start thinking more in depth about this??
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bradisfun
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Tue Mar 30, 2010 5:32 pm

maybe if you used a cheap drill in place of the motor?
thats all i can think of as they allready have cluch's so they dont burn out...
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chinnerz
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Tue Mar 30, 2010 5:52 pm

bradisfun wrote:maybe if you used a cheap drill in place of the motor?
thats all i can think of as they allready have cluch's so they dont burn out...
hey thats a good idea, in fact thats a great idea! how ever, i dont rly want to spent a heap of money on it, and i want to be able to use it no matter what (drill batteries die after a little while)

also i don't see a place for that chuck to grab on to, unless i remove that gear... but i think that is the only thing keeping the it balanced.... idk if i cant get this manual hand crank working ill use your idea bradisfun
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kjjohn
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Tue Mar 30, 2010 7:34 pm

That's a good idea! I never thought of taking one of those apart before. You could hook the crank up to an exercise bike hub - pressurize a cannon while improving your fitness :)
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chinnerz
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Tue Mar 30, 2010 8:04 pm

hahahaha!!!!
that's an awesome idea!!

'1 up' to you kjjohn
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jackssmirkingrevenge
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Tue Mar 30, 2010 11:21 pm

given the tiny stroke of the piston, the crank would have to be geared in the opposite manner to the motor, ie small pinion on the pump and a very high ratio on the crank.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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chinnerz
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Tue Mar 30, 2010 11:46 pm

as i have no idea where to get gears, and the gears are not reversible (different sized shafts) i was thinking of a 1:1 ratio.

but how to do this :S
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jackssmirkingrevenge
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Wed Mar 31, 2010 12:04 am

If you don't have gears to hand you could always try pulleys and a belt drive, much easier to improvise. A 1:1 ratio will get you nowhere, the stroke volume is tiny and you'd be pumping forever.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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POLAND_SPUD
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Wed Mar 31, 2010 12:19 am

I don't think that the motor is the problem... have you tested the motor? it's quite powerful
you might find out that it is a better idea to use a fridge compressor... and if you insist on tinkering with stuff you can try to open the case and use the compressor itself with a more powerful motor
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chinnerz
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Wed Mar 31, 2010 12:20 am

well i was thinking about using it for a a new rifle ,which i will start working on shortly, this rifle will have a relatively small chamber volume.

but i will be on the look out for gears, and now that i think about it... i have a friend who builds and races nitro RC cars, he may know where to get gears...

if worst comes to worst, i will probably end up getting that cheap drill.....
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jackssmirkingrevenge
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Wed Mar 31, 2010 12:35 am

If you're going to up the RPM, make sure you have cooling covered as these things get very hot very quickly even as standard.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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chinnerz
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Wed Mar 31, 2010 12:49 am

cooling eh?? how? heat sinks? what would you suggest??
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POLAND_SPUD
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Wed Mar 31, 2010 1:52 am

I don't know how.. probably a simple CPU fan would help a bit.. but the problem is that these things are not built to last...
Mine broke down after about 2 weeks of use

it might be a better idea to get either: a fridge compressor or a good stirrup pump...

As I said earlier, if you really want to build a portable compressor I suggest modding the fridge compressor... It isn't the best idea to mod something that's crappy so forget about 12V compressors..
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chinnerz
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Wed Mar 31, 2010 2:06 am

gee... thanks for the support guys :P

well, i don't rly care if i brake it, so i guess ill give it a go.... stay tuned for results i guess....
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POLAND_SPUD
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Wed Mar 31, 2010 2:12 am

well I don't think you get the idea... you'll be the one who has to build it and you are going to spend some $ on this project.. I tried to point out that you probably won't be very satisfied with the results you get...

but yeah, go ahead and try it...
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