Paul, try three. the export tab in autocad is where to save to many file
   types. I chose autocad14(dfx.)  I clicked the file and it auto opened in
   true-view2009 which must be installed on this computer. I tried rhino
   version 1. The file symbol in upper left corner then select file type to
   autocad14dxf from the list and it opened. the view " top" seems to be the
   plan view and since this is a twoD working drawing that seems right. text
   doesn't translate in other views. I didn't set the circle performance
   numbers from the default and it is readable, just not as smooth on the
   lines.What is left is the various cross sections up through the core
   engine
   in true scale. I will be extruding, revolving etc these into 3D solids
   and
   joining/filliting the solids for the solid model shortly.As usual no
   rights
   reserved,  anything helpful to anyone is available. this drawing has
   most of
   the mazda engine parts to scale as well as RWS  RD-1B mounting plate with
   the coordinates in decimal degrees translated from polar coordinates from
   the newsletter last month.The stock side housings were deleted off this
   drawing and the rotor was never drawn. Also the e-shaft between the
   eccentrics is approximate not to scale.The tension bolt locations were
   measured by dial caliper and the expected tolerence is on here somewhere.
   Enjoy oshkosh, I have family visiting and can't get there.

   george grimes

   The dxf file did not load. It appears it was not a vector dwg.
   The error message was un supported data type raster image.

   I am afraid the 3D world has moved away from autocad.

   Paul Lamar

  Paul...

  This probably isn't any help as you've already identified it as a raster
  file, but I was able to open it in Irfanview.  Irfanview will attemp
  several different formats if it doesn't recognize the extension.

  The image appears to be a very low resolution shot of an upside down
  program...with the drawing, whatever it is, scattered around.  It
  appears to be a bmp or some such, as Irfanview had no trouble
  translating it.

  It may be helpful if it can be used to show George what he's sending...

  Harley

  Paul the drawings are twoD at this point because I need to  relate all the
  cooling passages, oil circuit , bolt locations  and mazda parts into as
  compact a size as I can get, and keep relocating and removing metal here and
  there  to get the weight out of it without  violating the integrity of the
  separation of oil and water defined by possible o-ring locations.


Simultaneously the draft of the patterns both inside and outside  from top
  and bottom must allow the pattern to be pulled from the molding sand and
  avoid transitions in section modulus which could weeken the casting as it
  solidifys or produce hot tears during the metal solidification. For me it is
  easier to look through all the layered sections in a stack leaving out
  layers not in the area being worked on and when the puzzel is worked out
  then just extrude the layers with the pattern draft and join the parts into
  the solid.


The pattern solid can then have the machined surfaces removed
  with the slice command and bolt holes added to the remaining solid which
  will be the actual part. Then the g-code translater can machine the finished
  parts. I get to the stage of a rendered solid but rarely in the design
  stage. I have tried working with the 4 panes in 3D but entering 3 cartesian
  coordinates and editing points from the 3 windows  with filters  is much
  slower and to me confusing.


Many times I don't have the third coordinate
  because there is not a finished part to measure or digitize. When I get to
  the rendered views like your sample I will send them along. I expect to be
  finished with the core engine in twelve weeks and started on the patterns on
  my cnc router. making patterns is quick, figuring out how to run the router
  is unexplored territory. Anyway, glad we got  something to
  transfer,



george-grimes


You need to try Rhino George. It does everything you want it to
do. http://www.rhino3d.com/ The user interface is very much like ACAD.

Here is an end housing I did in Rhino.

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Here are some jpgs I think you will find useful.

Paul Lamar