Re: Hexapod question

> The only way a hexapod (Stewart platform) maintains alignment of
>the platform is by controlling the lengths of all 6 struts in a
>coordinated way.

With his struts locked (i.e. motors on) the structure should be
stable in all axis.

I think the problem is just the geometry of your struts. What you
have done is produced a 6 legged table with variable length legs.
NOT a hexapod.

Do a google image search for hexapod and notice how the nodes are
positioned on the table and on the frame. The pivots on the table
should be in three groups of two and those on the frame should also
be in three groups of two. The ones on the table are less important
and could probably stay as they are. This means that as you walk
around your hexapod you will see a zig zag pattern of struts. This
is much more rigid.

At least that's what I think is the problem.

Graham