Re: [CAD_CAM_EDM_DRO] 3d digitizing

I had posted a link to a hobby style digitizer, nobody seemed interested, I
could find it again. The problems I saw was the source code would have to be
changed in the way the motors were driven, and it was slow.
Robert Ash

----- Original Message -----
From: "Andrew Werby" <drewid@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Sunday, June 11, 2000 7:31 AM
Subject: [CAD_CAM_EDM_DRO] 3d digitizing


> Dean Lewis" <dean___lewis@...> wrote:
> Subject: 3D Digitizing
>
> Hello to all!
>
> I am new to the list and would like to ask for some help and
> guidance.
>
> I am looking at purchasing a Shoptask 2000 with the CNC stepper
> option and ball screws. I am well versed in working with CAD and I
> have a strong need for digitizing several parts for reverse
> engineering.
> [What sort of parts, and to what kind of tolerances? Do these have to fit
> other parts? How are you planning on building them?]
>
> I noticed that Maxnc offers a digitizer(RS232 probe)
> and mill setup, but is too small.
>
> [It's inadequate in other ways as well.]
>
> The ST 2000 is an ideal size and
> capacity for what I need.
>
> [I was impressed too. Nice-looking machines- has anybody here got one?
> They're at: <www.shoptask.com> They seem to have a fairly
reasonably-priced
> servo conversion as well as a range of CNC options. (hint- dig deeply in
> "options". ]
>
> The question I have is that can EMC be set
> up for digitizing? I have already installed EMC on my Linux PC and
> been messing with it a little. If it cannot do digitizing, is there
> another reasonable software package available for doing this?
>
> [I'd like to know this too.]
>
> Renishaw offer a probe and an additional controller for it that
> allows for non-voltage switching that could be adapted for RS232, but
> they do not offer software.
>
> [It's awfully expensive as well- $1500 just for the probe?.]
>
> I ran across Centroid and their products. I recently attended a
> local machine trade show and saw their setup first hand. Although it
> is a PC console setup with servo, it comes with a hefty price of
> 12.5K for the servos/controller alone. Their non-conductive surface
> probe and digitizing software would run an additional 5K. I have
> exausted my resources looking for alternatives. I would appreciate
> any help. Thank you in advance!!
>
> Regards,
>
> Dean Lewis
>
> [I just got a Roland MDX-15, and I think it does an excellent job of
> touch-probe scanning for flattish highly detailed objects. It has a
> needle-like probe with a piezo-electric sensor at the base, and an
> intelligent, simple,configurable probing routine. The problem is, that it
> has such a limited size range, especially in the z-axis: 2.4 inches max,
> even in their largest machines. I was wondering (along with a few others)
> if it were possible to use these probe units on a bigger machine- with EMC
> or any other control software. I haven't yet got a price on the probes
> alone, but it shouldn't be a whole lot. Their software is written for
their
> machines, though- and I don't know how easily it could be applied to
> another one. Is a probing routine a big deal for a programmer to write?
Can
> they be found? It's better if you end up with surfaces, like the Roland
> does, instead of just points, or tiny line segments, like MaxNC.
>
> If it's a relatively simple object, you can digitize it with a Microscribe
> arm, and generate a surface in Rhino. If you just have a few of these
parts
> to do, you might consider getting your scanning done by a service bureau,
> using a laser or structured-light 3d scanner, instead of investing in
> equipment.]
>
> Andrew Werby
> http://www.computersculpture.com
>
>
> Andrew Werby - United Artworks
> Sculpture, Jewelry, and Other Art Stuff
> http://unitedartworks.com
>
>
>
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