Re: [CAD_CAM_EDM_DRO] Hexapod ball joints, Moglice

Hi Graham:
Have you considered laying a collar of wax around the joint between the
shaft and the ball and then machining the wax to the cone shape that you
want to have as the aperture at the mouth of the socket.
The wax can be used to exclude the Moglice from where you don't want it in a
completely controllable way.
Once the Moglice has set, it's a simple matter to strip away the wax.
Cheers

Marcus

----- Original Message -----
From: "Graham Stabler" <eexgs@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, December 18, 2003 3:14 PM
Subject: [CAD_CAM_EDM_DRO] Hexapod ball joints, Moglice


> After the recent threads on building hexpods and on the rotobot
> concept I started thinking about building one. I decided I wanted to
> have decent ball joints as in the commerical versions to avoid
> problems with gimple lock etc etc yada yada
>
> So I suggested in the rotobot thread the use of Moglice to produce a
> ball joint.
>
> It is not cheap stuff so I am thinking along the lines of a hybred
> construction. I will probably turn a cup to house the ball and bore
> it in steps to a rough approximation of a socket. Then I'll suspend
> the ball (suitably tapped etc, that's the next problem) within the
> cup and pour in the Moglice. Obviously the ball will have to have a
> release agent layer but at the end a decent joint should be produced.
>
> The question I have is on the machinability of Moglice, if I try to
> make a one piece ball socket, will I be able to work at the
> aperture. i.e. I will fill the socket such that a lot of the ball is
> covered but then I need to increase the size of the hole so that I
> get plenty of movement.
>
> Otherise I will go for a two part socket.
>
> I have ordered the Molgice (in the uk), more to follow
>
> Graham
>
>
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