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| AutoCAD in Bewegung © Schulz | ||
| 1. What did we do in AutoCAD until now? Normally AutoCAD 2000 is used as a pure construction program to create 2d-drawings of single parts or sets. But today, especially Mechanical Desktop and Inventor are often used to design real 3d objekts. In documentation/graphics/design shaded and rendered models are used. AutoCAD offers the chance to animate, i.e. playing picture-serials, where the single pictures hav to be created before. But as described in Autocadmagazin 2/01 there are further possibilities: With help of AutoLISP (or VisualLisp) you can simulate and control the motion of simple mechanisms at screen in real time. Here "Simulation" doesn't mean - in opposite to "Animation" - the use of already produced pictures. Simulation stands for the real-time motion control of motional systems, which have been created before. | ||
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2. What will the program-example SIM3D.FAS (AutoLISP) do? The motion-system consists of simple geometrical 3d-solids - i.e. cylinders quaders and cones; but you can use your own 3d-blocks as well. These 3d-solids are aligned within a not closed series of 3d-lines - so that they form an open cinematic chain. On each vertex of that chain there will be a changing of the direction or a translation in the former direction. The example SIM3D.FAS showes a manipulator-jib, consisting of 5 steerable joints. The joints 1, 2, 4 and 5 are rotatory joints and the joint 3 is a translatoric joint. You can control these joints at fixed intervals. The resulting motion is shown directly at screen. | ||
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3. How to use? After downloading and unzipping please open the drawing MANIPU.DWG. Next copy the program SIM3D.FAS to a current AutoCAD-folder (i.e. where ACAD.EXE is located). Then load the program by typing (load "SIM3D.FAS") from the AutoCAD-command line and start it by typing SIM3D. Next hints you will get from the program. The input of 0 will stop the run and fix the manipulators location. Just contact me if there are any problems. | ||
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