Re: [CAD_CAM_EDM_DRO] Linear Slide Components

One word will describe why commercial sides are so popular and that would be
efficiency and accuracy! Oh, that two words! But don't get discouraged,
one could make there own, but sooner or later, your going to what to use
those "commercial linear components" in your system!

Russ

----- Original Message -----
From: Lee Wenger <wenger2k@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, March 31, 2002 11:35 AM
Subject: [CAD_CAM_EDM_DRO] Linear Slide Components


> I'm a relative newbie to this whole CNC thing but have come to some
> conclusions and would like some thoughts from several of you that have
built
> machines. First of all my interest is predominantly for a CNC router as
> opposed to a mill and or plasma cutter. Although I think my questions
would
> certainly apply to the creation of a plasma table.
>
> One of the major elements is obviously the linear slide components and to
be
> perfectly honest I don't understand why the need (in other words, the
> quantifiable difference) to use commercial quality components that
increase
> the cost so dramatically. People regularly bash any use of anything other
> than commercial grade linear slide components? Why, why is it that a
> V-wheel on angle iron or skateboard wheels against a hard flat edge is
such
> a horrible idea? From what I've seen, as soon as you use any commercially
> available linear components the cost of those components alone is well in
> excess of $1000 for a 4x8. Of course there is the eBay option but
> personally, ideally, I'd like to do something that is reproducible as
> opposed to a total science project.
>
> I'm not being defensive but rather truly trying to determine the
difference
> between these approaches.
>
> Another question I have is how does one go about squaring a large table.
I
> certainly know how to do traditional construction type of squaring and
what
> a 3-4-5 triangle is and all that but how on earth do you measure these
> things to sufficient accuracy on such a large scale. I'm assuming my
> framing square will be completely useless as it would only be suitable for
> initial setting but I would need a far more accurate way to finalize my
> squaring.
>
> Last question, I don't own a mill and will need to make some parts for my
> machine. Do you all have suggestions as to lower cost ways to produce
some
> of the machined parts I need made outside of the traditional commercial
> machine shop?
>
> Thanks in advance for all of your help.
>
> Lee Wenger
>
>
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