Re: EMC Problem

Hi Brian,

No problem, I just get excited too quickly! Since I want to ultimately
control 5 axes, anything which suggests this might be possible gets my
immediate attention. I have looked at several hexapod sites and, whilst I
can see that they are fun to play with, I haven't yet worked out how they
are better than conventional tools. Having just written that, however, one
use has come to mind in the medical field where perhaps such a tool, linked
to a video feedback system, could be used to maintain the position of a tool
over a moving body although they would have to knock me out well and truly
before posting me into such a machine!! ;o) Perhaps a bit of explanation of
the theory and reasoning behind hexapods would benefit us all - the web
sites are a bit sparse in this respect.

Ian
--
Ian W. Wright
Sheffield UK

----- Original Message -----
From: Brian Register <register76@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: 28 September 1999 00:55
Subject: Re: [CAD_CAM_EDM_DRO] EMC Problem


> From: Brian Register <register76@...>
>
> Ian:
>
> Sorry if I created any confusion. I didn't realize
> that yemc is currently not released (actually I'm
> still not sure if it's released or not). yemc is a
> program that was written to give GUI support for the
> hexapod work I'm doing and I don't know what the
> future plans are for yemc or if it is even suitable
> for release in its current state.
>
> Also, as Fred mentioned, the trajectory planner
> doesn't support orientation trajectories anyway. So
> for conventional machines you currently won't get any
> real benefit from using more than three axes since I
> assume you want the extra axes to control orientation.
> For Hexapods, however, you have to control all six
> axes just to get xyz motion since the axes are
> non-orthogonal. So the fact that I can't get control
> of orientation isn't as big of a deal.
>
> Probably should have mentioned that the first time.
> Anyway, sorry again for the confusion.
>
>
> =====
> -----------------------------------------------------------
> Brian Register
> University of Florida
> Graduate Student - Mechanical Engineering
> register@...
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