|
osdir.com mailing list archive |
|
Subject: Re: Yet another Technic 9V motor comparison update - msg#00019List: hardware.lego.roboticsit shows this new kind of motor is... pure... weak why it takes 10 times more current giving just 1/4 more rpm than 71427? and why it consumes almost 2 times more current with load? why they use it? i hope there were some cases (not only cash) to deevolute lego motors :((( pixel "Philippe Hurbain" <philohome@xxxxxxx> wrote in message news:HKMtBD.4IA@xxxxxxxxxxxxx > I have updated my <http://www.philohome.com/motors/motorcomp.htm motor > comparison page> > > You'll find data on the new clear case motor included in > <http://guide.lugnet.com/set/4094 4094 motor movers set>. > > <<http://www.philohome.com/motors/r47154-t.jpg>> > > There is also a new comparison: how to maximize mechanical power extracted > from > a single RCX output > > And as a by-product see the method I used to externally power the RCX from an > external regulated supply. > > <<http://www.philohome.com/motors/fake-batt1-v.jpg>> > > Cheers, > > <http://www.philohome.com Philo> -- Did you check the web site first?: http://www.crynwr.com/lego-robotics Thread at a glance:
Previous Message by Date: click to view message previewYet another Technic 9V motor comparison updateI have updated my <http://www.philohome.com/motors/motorcomp.htm motor comparison page> You'll find data on the new clear case motor included in <http://guide.lugnet.com/set/4094 4094 motor movers set>. <<http://www.philohome.com/motors/r47154-t.jpg>> There is also a new comparison: how to maximize mechanical power extracted from a single RCX output And as a by-product see the method I used to externally power the RCX from an external regulated supply. <<http://www.philohome.com/motors/fake-batt1-v.jpg>> Cheers, <http://www.philohome.com Philo> -- Did you check the web site first?: http://www.crynwr.com/lego-robotics Next Message by Date: click to view message previewRe: Yet another Technic 9V motor comparison updateThanks Philo, you are the best! -- Best regards, /Tobbe <http://www.lotek.nu> (remove SPAM when e-mailing) -- Did you check the web site first?: http://www.crynwr.com/lego-robotics Previous Message by Thread: click to view message previewYet another Technic 9V motor comparison updateI have updated my <http://www.philohome.com/motors/motorcomp.htm motor comparison page> You'll find data on the new clear case motor included in <http://guide.lugnet.com/set/4094 4094 motor movers set>. <<http://www.philohome.com/motors/r47154-t.jpg>> There is also a new comparison: how to maximize mechanical power extracted from a single RCX output And as a by-product see the method I used to externally power the RCX from an external regulated supply. <<http://www.philohome.com/motors/fake-batt1-v.jpg>> Cheers, <http://www.philohome.com Philo> -- Did you check the web site first?: http://www.crynwr.com/lego-robotics Next Message by Thread: click to view message previewRe: Yet another Technic 9V motor comparison updateHi Pixel, > why it takes 10 times more current giving just 1/4 more rpm than 71427? > and why it consumes almost 2 times more current with load? > I think you're a bit harsh with this motor. Granted, no load current is much higher, but here we depend on friction alone so it is not very significant. Under load, current is indeed higher, but speed too, so mechanical power is actually greater. In other words, with the same final speed you could gear down more thus lightening load and current. The significant figure is efficiency, which is "only" 20% lower (54% -> 43%). And since you can inject more current in this motor you can get a higher mechanical output power - about 35% more. I really think this motor is a good, rugged one. The flat bottom and axle hole shaft also make it easier to use... Philo -- Did you check the web site first?: http://www.crynwr.com/lego-robotics Loading Comments...
|
|
