Then it is not a "hexapod" The word means literally "six legs" What he has is a "Steward Platform". These are used as shown for mills but also for airplanes simulators and now at amusement parts for those simulated rides
Steward Platforms have six motors and are 6DOF. Hexapods hav 6 legs and each legs and have 2, 3 or 4 degrees of freedom. You can imagine why I was nterreted when I thought some one might rebuilding a 24 axis machine kit based controller and was able to fit it inside a robot. typically peole ding this use much smaller controllers but with poorer result, see video below. Here is a video of about the simplest hexapod made with model airplanes serves. ITuses an 8-bit Arduino for control. It needs a more powerfull controller that 8-bit arduino is not able to run a fast enough control loop. https://youtu.be/ojue8NCrs9g?t=1m13s On Sat, Jul 28, 2018 at 1:24 AM Sven Wesley <[email protected]> wrote: > I am pretty sure Dave's hexapod is a six axis milling setup. Not a walking > spider robot. > Like this one: > https://www.youtube.com/watch?v=G_UmhUjZhNo > https://www.youtube.com/watch?v=nebJ59TcYlQ > > On Sat, Jul 28, 2018 at 4:54 AM Chris Albertson <[email protected] > > > wrote: > > > What kind of hexapod are you building? I've have a long interest in them > > but, so far have only built single legs as prototypes. All of then had > > short lifetimes. > > > > What what kind of motors are you using and how many per leg? Finding > good > > motors at a reasonable price is important. With only 3 per leg you need > 18 > > motor and an 18-axis controller. With 4 per leg you have a 24-axis > system > > and even if you only spend $100 per axis it costs a bit. > > > > The inverse kinematics is not hard to work out. Just a long and repeated > > application of the plain geometry and so trig. > > > > > > > > On Fri, Jul 27, 2018 at 7:23 PM dave engvall <[email protected]> > wrote: > > > > > Oh damn, I just sent my reply to Andy not to the list so here goes > again. > > > > > > I just had Ray Henry on the phone and picked his brains. He says tk was > > > written for the hexapod so one needs to find the hexapod kinematics. > > > From there is should be easy or so he says. I've never tried it so all > > > I can do is relay information. Sorry I can't be more help. > > > > > > An "old" wiki may shed more light. > > > > > > Dave > > > > > > > > > On 07/27/2018 02:59 PM, andy pugh wrote: > > > > On 27 July 2018 at 22:01, yomin estiven jaramillo munera > > > > <[email protected]> wrote: > > > >> hi to everybody, my application is a hexapod and i decided to > change > > > my GUI > > > >> from axis to tklinuxcnc, my problem is that in the axis GUI all my > > axis > > > >> move without problems but in tklinuxcnc i have problems with the Y > > axis > > > >> specifically , This is the error: > > > > Which version of LinuxCNC are you using? > > > > > > > > I am not sure if tklinuxCNC is entirely aware of non-identity > > > kinematics. > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------------ > > > Check out the vibrant tech community on one of the world's most > > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > > -- > > > > Chris Albertson > > Redondo Beach, California > > > > > ------------------------------------------------------------------------------ > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
