OT- subtractive technologies
This isn't an openSCAD question, but I'm sending it out to the list since
some of the members seem to know subtractive machining technologies well
(like laser cutting, etc).
What techniques exist for taking a block of material and making a set of
nested cups or bowls from it. A symmetric shape is nice but I'm completely
open to techniques that would not guarantee a symmetric product. My goal
is to waste as little of the material as possible. I did see a wood
turning video where they used a special cutting implement to make three
nested bowls from one wood burl.
In theory, a stiff heated ni-chrome wire could be used to cut the material
and get a useable piece, but in practice I'm kind of doubtful on how well
that would work.
What other techniques can one use?
If the material is very pliable like foam rubber you can distort it in a
mold so that a plane cut through the mold produces the desired shape cut
when the foam is released from the mold. It's the 3D version of shaping
a stack of paper and drawing straight lines on the edge of the stack so
that the lines are curved when the stack is flat.
On 12/9/21 7:34 PM, Daniel Shriver wrote:
This isn't an openSCAD question, but I'm sending it out to the list
since some of the members seem to know subtractive machining
technologies well (like laser cutting, etc).
What techniques exist for taking a block of material and making a set
of nested cups or bowls from it. A symmetric shape is nice but I'm
completely open to techniques that would not guarantee a symmetric
product. My goal is to waste as little of the material as possible.
I did see a wood turning video where they used a special cutting
implement to make three nested bowls from one wood burl.
In theory, a stiff heated ni-chrome wire could be used to cut the
material and get a useable piece, but in practice I'm kind of doubtful
on how well that would work.
What other techniques can one use?
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Richard
http://www.kandarian.com/
That's an interesting idea Richard- I'll have to keep that in mind. I'm
asking both in general and I guess I should throw in my specific
situation. The material I want to work on is a wood burl, so it is brittle
and not flexible.
On Thu, Dec 9, 2021 at 9:45 PM Richard Kandarian richard@kandarian.com
wrote:
If the material is very pliable like foam rubber you can distort it in a
mold so that a plane cut through the mold produces the desired shape cut
when the foam is released from the mold. It's the 3D version of shaping a
stack of paper and drawing straight lines on the edge of the stack so that
the lines are curved when the stack is flat.
On 12/9/21 7:34 PM, Daniel Shriver wrote:
This isn't an openSCAD question, but I'm sending it out to the list since
some of the members seem to know subtractive machining technologies well
(like laser cutting, etc).
What techniques exist for taking a block of material and making a set of
nested cups or bowls from it. A symmetric shape is nice but I'm completely
open to techniques that would not guarantee a symmetric product. My goal
is to waste as little of the material as possible. I did see a wood
turning video where they used a special cutting implement to make three
nested bowls from one wood burl.
In theory, a stiff heated ni-chrome wire could be used to cut the material
and get a useable piece, but in practice I'm kind of doubtful on how well
that would work.
What other techniques can one use?
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
--
Richardhttp://www.kandarian.com/
OpenSCAD mailing list
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Directional oil well drilling comes to mind.
If you had a thin flexible cable with a burr or other destructive
element on the end which could be directed through a lumen in the cable
you you could send the cable on an arbitrary course through the material
with some limit on the curvature. This could be done repeatedly on paths
that nearly, or barely, touch so that the pieces could be separated
after all the paths were completed. I think this would take considerable
R&D to become real.
On 12/9/21 7:51 PM, Daniel Shriver wrote:
That's an interesting idea Richard- I'll have to keep that in mind.
I'm asking both in general and I guess I should throw in my specific
situation. The material I want to work on is a wood burl, so it is
brittle and not flexible.
On Thu, Dec 9, 2021 at 9:45 PM Richard Kandarian
<richard@kandarian.com mailto:richard@kandarian.com> wrote:
If the material is very pliable like foam rubber you can distort
it in a mold so that a plane cut through the mold produces the
desired shape cut when the foam is released from the mold. It's
the 3D version of shaping a stack of paper and drawing straight
lines on the edge of the stack so that the lines are curved when
the stack is flat.
On 12/9/21 7:34 PM, Daniel Shriver wrote:
This isn't an openSCAD question, but I'm sending it out to the
list since some of the members seem to know subtractive machining
technologies well (like laser cutting, etc).
What techniques exist for taking a block of material and making a
set of nested cups or bowls from it. A symmetric shape is nice
but I'm completely open to techniques that would not guarantee a
symmetric product. My goal is to waste as little of the material
as possible. I did see a wood turning video where they used a
special cutting implement to make three nested bowls from one
wood burl.
In theory, a stiff heated ni-chrome wire could be used to cut the
material and get a useable piece, but in practice I'm kind of
doubtful on how well that would work.
What other techniques can one use?
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--
Richard
http://www.kandarian.com/
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--
Richard
http://www.kandarian.com/
If you are into wood turning, then you'll need to get the curved blades
for replicating what you saw in the video. If you only have straight
blades, then you will be stuck with nested cones. You could slice the
block, cut profiles in the slices, (with a jig saw, say) then glue the
slices back together again, and finish in lathe/by hand. You could have
more or less parallel sides, and glue on separate bases. If you want
curved sides, without the curved blades, then you will be wasting more
wood than you're saving, with straight turning tools.
On 10/12/2021 02:34, Daniel Shriver wrote:
This isn't an openSCAD question, but I'm sending it out to the list
since some of the members seem to know subtractive machining
technologies well (like laser cutting, etc).
What techniques exist for taking a block of material and making a set
of nested cups or bowls from it. A symmetric shape is nice but I'm
completely open to techniques that would not guarantee a symmetric
product. My goal is to waste as little of the material as possible.
I did see a wood turning video where they used a special cutting
implement to make three nested bowls from one wood burl.
In theory, a stiff heated ni-chrome wire could be used to cut the
material and get a useable piece, but in practice I'm kind of doubtful
on how well that would work.
What other techniques can one use?
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org