Re: [CAD_CAM_EDM_DRO] Re: reprat build started

Self replication and rigidity are not mutually exclusive... Watch this
space for my new printer design announcement coming in the next 72
hours or so. :-)

I agree that some people take the self-replication thing a bit too
seriously, but the self-replication goal is the only thing that has
allowed the reprap to make the progress that it has over the last 5
years. Not only does self-replication lowers the bar to entry by
lowering the cost, it also makes it trivial to try new ideas, which is
what has let us push the bar so far in our print quality.

I do agree that there is a huge hang up on the threaded rod thing.
They work and they are cheap, but they don't work all /that/ well, and
they are not that much cheaper than the alternatives. Anyway, that
will be changing in the next few days.

On Wed, Oct 12, 2011 at 11:00 AM, Alan <KM6VV@...> wrote:
> Yeah, as I've just discovered, they're moving MUCH faster than I had
> erroneously calculated!  I've done moves (bragging rights) of over 100 IPM
> on my Sherline, but that certainly wouldn't be good for it.  And these
> speeds are still probably too fast for my little PCB router.
>
> It's a shame that a similar-sized XYZ platform (Sherline or PCB mill)
> couldn't be used.  And although I'd love the time and energy to design and
> build a similar-sized belt-driven platform, that's probably not going to
> happen.  It would be nice to get away with a few experiments without buying
> all the CNC stuff all over...
>
> The Threaded-rod and plastic (extruded) parts SAE Prusa Mendel is a novel
> way of building a belt-driven platform, although I'd much rather just "frame
> up" a platform with aluminum stock and precision round ways (OK, maybe drill
> rod).   80/20 Aluminum extrusions would be a GREAT way to go!
>
> Not to slight what's been built, but too many RepRat followers are (in my
> opinion) "hung up" on the self-replicating dogma.  While extruded parts
> might be fine for prototypes and simple low-stress parts, (I've seen and
> worked with parts made by the Dimension), I hardly think they are
> appropriate for production machines, even light-duty.  I'll buy or hob the
> gears!  Of course, this could all change!  The produced parts could get much
> better in the next few years.  And yes, it would be fun to "play around"
> with making prototype parts this way, although I'm more interested in making
> metal chips. <rant off/>
>
> Alan  KM6VV
>
>> -----Original Message-----
>> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Ron Ginger
> Your Sherline must be a lot faster than any I have ever seen if you
> expect this to work.
>
> Until reading this thread and looking at some of the videos I had been
> on the same track- why not just add an extruder to my mill. But clearly
> this needs to go a lot faster than a mill.
>
> ron ginger
>
>
>
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