2011/4/13 R. van Twisk <e...@rvt.dds.nl> > Who didn't say that bigger is not always better??? > http://patapsco.nist.gov/ImageGallery/retrieve.cfm?imageid=299&dpi=150&fileformat=jpg > Looks good to me!!! :D > > To tell the truth, I can not imagine why they made the hexapod SO big in NIST. I.e. I can see some advantages, but... It surely helped to understand many things, and it was very precise (with laser interferometers at every strut), but so large machine for such a small workpieces - just not effective.
> However, out of curiosity, what is the advantage of a hexapod over a 5 axis > machine? > > Ries > > There's nothing that hehapod can do but conventional 5 axis machine couldn't. But potentially hexapod can do it faster and with less power consumption. If you want to achieve high speed and acceleration, you have to move pretty large masses in conventional machines - and much smaller masses in hexapod and other parallel robots. For example, as I know, the world fastest robots are all parallel machines (delta robots). Andrew > On Apr 13, 2011, at 11:21 AM, Kent A. Reed wrote: > > > On 4/13/2011 10:44 AM, Andrew wrote: > >> ... > >> By the way, there are not NIST hexapod photos any more here > >> http://www.mel.nist.gov/photos/hexa.html > >> I was not smart enough to save them to my computer, and can not find on > the > >> net any more. Pity. > >> > > > > Trick 1: You were looking at a website run by the specific laboratory. > > NIST itself has a photo gallery. A search on "hexapod" at > > http://patapsco.nist.gov/ImageGallery/search.cfm turned up two images, > > one of the real hexapod and one of a VR version of same. Not so many as > > I expected. > > > > Trick 2: the Internet Archive. I think you'll find everything you want > > at, for example, > > > http://replay.waybackmachine.org/20100527204402/http://www.mel.nist.gov/photos/hexa.html > > > > Trick 3: send an email either to the NIST Public Inquiries unit or to > > the Manufacturing/Robotics folks (Fred Proctor, for example) and I'm > > sure they can provide or put up more images. You can mention my name if > > you want; I can't promise it will help. Sending them an image of your > > own work will undoubtedly go a long way :-) > > > >> As an aside, when I first looked at your video, I thought you had built > >>> your machine in your living room! If you actually did, please give me > >>> some pointers on how to convince my wife I should be able to build > >>> robots in ours:-) > >>> > >> Oh, it's only low ceilings prevented me from building it at home =)) > >> I guess, I'd rather built it in garage, but it needs plenty of room. > >> So, the machine is built at the university. > > I guess I was fooled by the nice floor. We had painted concrete. If we > > were lucky, parts of it were covered with linoleum tile. > >> Thanks and besr regards, > >> Andrew > > And to you, Andrew. > > > > Kent > > > > > > > ------------------------------------------------------------------------------ > > Forrester Wave Report - Recovery time is now measured in hours and > minutes > > not days. Key insights are discussed in the 2010 Forrester Wave Report as > > part of an in-depth evaluation of disaster recovery service providers. > > Forrester found the best-in-class provider in terms of services and > vision. > > Read this report now! http://p.sf.net/sfu/ibm-webcastpromo > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------------ > Forrester Wave Report - Recovery time is now measured in hours and minutes > not days. Key insights are discussed in the 2010 Forrester Wave Report as > part of an in-depth evaluation of disaster recovery service providers. > Forrester found the best-in-class provider in terms of services and vision. > Read this report now! http://p.sf.net/sfu/ibm-webcastpromo > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
