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I see alot of people remove the spring from the large pump to make a better motorized pump. I'm gonna try that myself, but I'd hate to destroy my only large pump, so I'm asking for experience. Is there anything I should know before I attempt this (...) (23 years ago, 28-Apr-01, to lugnet.technic)
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| | Re: springless pneumatic pump
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unscrew the spring? I had thouhgt of that, but decided that everyone probably pops the end cap off the piston then goes from there. Unscrewing the spring is probably better for the pump, not so good for the spring, but maybe I should re-consider (...) (23 years ago, 28-Apr-01, to lugnet.technic)
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| | Re: springless pneumatic pump
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Unscrew the spring over the plunger knob. It will deform it slightly. It can be reinstalled in the reverse manner. I have removed mine and reinstalled it successfully. -- Bob Fay rfay@we.mediaone.net (URL) Heverly" <theverly@nospam.hotmail.com> (...) (23 years ago, 28-Apr-01, to lugnet.technic)
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| | Re: springless pneumatic pump
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(...) Congrats on getting it off successfully...it took me some work to get one off and I ended up bending the spring slightly. However in my testing it seemed that the large pump, even without the spring, performed a bit worse than the smaller pump (...) (23 years ago, 29-Apr-01, to lugnet.technic)
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| | Re: springless pneumatic pump
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I've seen a website somewhere... A guy has done some real good testing (with help of RCX) regarding the performance of several pneum. pumps. Simple conclusion: the small one from Lego is the best, just use that one and leave the large ones with (...) (23 years ago, 29-Apr-01, to lugnet.technic)
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| | Re: springless pneumatic pump
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(...) I guess I'd better own up to prevent more people wasting their time and effort trying to remove the spring from the large hand pump. I think we have all been badly misled by the picture of the Recycler on the bottom of the RIS 1.0 box which (...) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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(...) Agree'd, I'd destroyed mine when I snipped off the spring only to have it not work well at all. I have a great 4 pump motor pack now. PSI! Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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Where did you get a "4 pump motor pack "? -- Kenneth A. Drumm Ph.D. "Dean Husby" <nntp@akasa.bc.ca> wrote in message news:3AECE1EF.C6460E...a.bc.ca... <snip> (...) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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Yea, I kinda figured the big punp wasn't too good for the compresor pump. I did see that on your page, but I figured I'd try it anyhow. Part of my problem (and I'm kinda ashamed to say it) is that is actually the only pump I own, large or small. (...) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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(...) Hey, console yourself! It's not as useless as you think. In fact, the large pump worked by hand is the most efficient of all. Only thing you gotta supply the energy :-) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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(...) LOL yup...if you have a fast and powerful hand you can create a ton of pressure within seconds with this... BTW I recently acquired a pack of two small pumps for $10US from the Dacta site...so this might be a solution if you're looking for the (...) (23 years ago, 1-May-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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(...) Yea, it does seem to work well manually, I was just trying to get some of that mechnized action out of it. It's all about the tinkerin'. =) I saw the pumps on the Dacta site, but I'm afraid the finance committee (wife) has put a spending (...) (23 years ago, 1-May-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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(...) You have failed to point out that moving involves a lot of heavy lifting. This can be reduced significantly by placing heavy objects on air-cushioned platforms. Air-cushioned platforms require air pumps. Purchase justified. Matthias Jetleb (...) (23 years ago, 1-May-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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heheh I like it! it is justified! I'm gonna go buy some right now! Thanks for the good reasoning. =) Tom Heverly (...) (23 years ago, 2-May-01, to lugnet.technic, lugnet.robotics)
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| | Re: springless pneumatic pump
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(...) Agreed... Large pumps suck at being motorized. But has anyone ever tried mounting one to a piston-like assembly? Maybe something that pushes and pulls it much like a human hand would. I have been wondering for a while if this would be better (...) (23 years ago, 2-May-01, to lugnet.technic, lugnet.robotics)
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