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Keep the dimensions to nice whole numbers like 26x38m. Draw a rectangle defining the area of interest.To make a 3D mesh model from raster data in ArcMap. cnc machining cambam rapid protoyping 3d milling accutrans arcmap digital elevation model dem Rouging took 2h25m and the finishing took 2h50. I decided to cut the model into four pieces and cut one of the 11x11cm pieces. Object moved, so the topmost point is placed at z=0.
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Go to File > Save As > StereoLithography (Binary).The z-height should now be shown as the thickness of the stock material.This should be a positive number! Click “Extrude”. Enter the material thickness minus the z-height of the surface to be milled.Click “Set Min at 0,0,0″ to get things straight. Enter “1″ into the boxes for “X” and “Y” and leave the “Z”-measurement as it just was calculated.Now take the delta-height measurement (divided by ten) from ArcMap and enter it into the Z-axis box (in this case 6,1 - corresponding to 61m). The dimensions will update, but the image displayed will remain the same. Select X axis and enter “220″ into “New Size”. In this case “4″ resulting in 339,488 triangles. The vertex interval should autoselect to something reasonable. Set “Multiplier 2″ to 1, and “X and Y Spacing” to 1 as well.Open the exported TIFF file by going to File > Open DEM > Bitmap to DEM.The reason for exporting two different files is because Accutrans can only read the rendered TIFF-file, but to get the correct height values the unrendered version is needed with ArcMap. Not the difference between High and Low values, this is needed in AccuTrans.Repeat the export process, but uncheck “Use Renderer”.I set the “Cell size” to “4″ to get a reasonable file size for a 6.6 x 6.6km square. Choose “Selected Graphics” in “Extent” and “Use Renderer” under “Output Raster”.Choose some nice round dimensions in whole metres - it makes things easier. Load the DEM into the Table of Contents.Here I take a 6.6 x 6.6 km piece of the real world and turn it into a 22 x 22 cm model.