 | | Re: pneumatic cylinder: why not hydraulic ??
|
|
Not alone thinked about it a while back,currently studing fliud power and in the fluid power industry (...) Lego pneumatic cannot be used for hydraulic's period! Nor will there be such a thing put out by lego there in the toy industry not heavy (...) (21 years ago, 8-Apr-04, to lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
purpledave@maskofdestiny.com (Purple Dave) wrote in <Hvtrvs.sBv@lugnet.com>: (...) And where would you leave all that fluid? Fluids aren't compressible (yeah, they are, but so much less than air that I'm close enough for government work). (21 years ago, 8-Apr-04, to lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
(...) Not necessarily. Assuming both cylinders are the same size, a full pump cylinder stroke will only result in a full working cylinder stroke if the working cylinder doesn't have significantly more resistance than the pump cylinder. If the (...) (21 years ago, 7-Apr-04, to lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
(...) One key thing about hydraulics has always been "avoid leaks". To switch the fluid, just invent something I've wished for for years - the reverser switch. This switch has four ports, used in opposing pairs. Clockwise in a circle they would be (...) (21 years ago, 7-Apr-04, to lugnet.technic)
|
| |
| | Re: MStamp
|
|
(...) Yes, eventually that will happen. The tricky part is actually buying the stamp. :) I'm a little worried that the ink will drip out of the ink pad since it's inverted but I'll just have to cross that bridge when I get to it. As for the real (...) (21 years ago, 7-Apr-04, to lugnet.robotics, lugnet.technic, FTX)
|
| |
| | Re: MStamp
|
|
(...) plan to replace the wheel and plate with a real ink stamp? This could definitely be used for real work! What about using a simple downward-acting, self-inking stamp? I have one of these for applying my return address on envelopes, and it's (...) (21 years ago, 7-Apr-04, to lugnet.robotics, lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
purpledave@maskofdestiny.com (Purple Dave) wrote in <HvrHn0.Cpw@lugnet.com>: (...) I'd add 7. if you used hydraulics, a cylinder would extend or retract fully with one stroke of the pump. The resistance the cylinder encounters is transmitted to the (...) (21 years ago, 7-Apr-04, to lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
(...) Well one solution to that problem is to position all the switches above a "hydraulic fluid catchment area", however I still think it would be prone to spillage ;) ROSCO (21 years ago, 6-Apr-04, to lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
(...) The simplest reason is that when the switch is flipped to one side, the other port is released to the atmosphere. This means that your hydraulic fluid would spill all over the floor. Figure out how to eliminate the free release (hint, only (...) (21 years ago, 6-Apr-04, to lugnet.technic)
|
| |
| | Re: pneumatic cylinder: why not hydraulic ??
|
|
(...) I can think of a few concerns that would need to be answered before using a pneumatic cylinder as a hydrolic cylinder: 1. will the seals work properly I'd be concerned that the lubricant would get washed away by water, so the only way to (...) (21 years ago, 6-Apr-04, to lugnet.technic)
|
| |
| | pneumatic cylinder: why not hydraulic ??
|
|
Hi everybody, I' ve read a long time ago something like this: LEGO pneumatic cylinder cannot be use as hydraulic cylinder. Is anybody can explain me why ?? May be we can' t use water with cylinder (may be cause of corrosion) but what about silicone (...) (21 years ago, 6-Apr-04, to lugnet.technic)
|
| |
| | Bric'Mania for AFOLs
|
|
A french message follows... Un message en français suit.. Dear AFOLs I have the joy of announcing the launch of (URL) Bric'Mania> This event is organized for you, AFOLs, and come to show us your MOCs. Bric'Mania will take place in Grenoble (France) (...) (21 years ago, 5-Apr-04, to lugnet.loc.fr, lugnet.loc.eu, lugnet.loc.be, lugnet.loc.de, lugnet.loc.it, lugnet.loc.nl, lugnet.loc.uk, lugnet.events, lugnet.technic, lugnet.town, lugnet.trains, lugnet.castle, lugnet.space, FTX)
|
| |
| | Re: New MOC: Double Track Train Bridge
|
|
(...) I agree, but unfortunately my computer does not! My CAD version of the Sydney Harbour Bridge now exceeds the ability of my somewhat antiquated computer to render it (even in MLCad). So until I upgrade, it remains about 3/4 complete in a bunch (...) (21 years ago, 5-Apr-04, to lugnet.technic, lugnet.trains)
|
| |
| | MStamp
|
|
I am proud to finally announce: the MStamp. (URL) One of, if not the first, completely automatic factory automation robots ever produced with wholly MindStorms, this robot is capable of automatically stamping standard (URL) SealedAir #1 padded (...) (21 years ago, 5-Apr-04, to lugnet.robotics, lugnet.technic, lugnet.announce.moc, lugnet.loc.us.oh.cle, FTX)
|
| |
| | Re: New MOC: Double Track Train Bridge
|
|
(...) I second that! TJ, CAD'ing your creations is very important. Especially, before you recycle for the parts. If you have not used it or would like to find out more information, let me know. I can also demo a bit for you at the April Dinner. (...) (21 years ago, 5-Apr-04, to lugnet.technic, lugnet.trains)
|
| |
| | Re: Advice from crane builders (was: Blimey)
|
|
(...) I agree with Steve. HOG it! Besides, your MOC will have so many mechnical parts, eliminating the A-frame cylinders will make it more simple and your life easier, IMO. -TJ (21 years ago, 5-Apr-04, to lugnet.technic)
|
| |
| | Re: Advice from crane builders (was: Blimey)
|
|
(...) Well on my crane I went straight for the HOG approach, I didn't actually find out how the A frame was raised on the prototype until after completion. I did consider retrofitting a solution but the prototype utilised a big fat multi telescopic (...) (21 years ago, 5-Apr-04, to lugnet.technic, FTX)
|
| |
| | Re: Advice from crane builders (was: Blimey)
|
|
(...) OK, I wanna ask some advice on this one from the big crane builders (yeah that's you!!) I was aiming to be able to lift the a-frame mechanically, but so far have found no solution. I would have liked to use pneumatics, but with the a-frame (...) (21 years ago, 5-Apr-04, to lugnet.technic, FTX)
|
| |
| | Re: Pneumatic Cylinders
|
|
(...) You should also try with another cylinder to blow air into the pump while it is fully retracted (or being retracted). Otherwise your testing will not reveal a defective non-return valve. The air inflow in the pump through the nozzle should be (...) (21 years ago, 4-Apr-04, to lugnet.technic)
|
| |
| | What can you do with a 8460?
|
|
With the buying frenzy surrounding 8438 subsiding as this second reissue being sold out as well, it is time to ponder: What can you do with a 8460/31/38 set? Anyone who has built something out of the 8460 please reply below. When I first thought of (...) (21 years ago, 4-Apr-04, to lugnet.technic)
|
