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I recently finished converting my Smithy 1220 LTD to a CNC. I designed all the hardware from scratch, as everything that I found available seemed inadequate for my needs. I design electronics for a living, so it was no big deal to me. However, I was totally unprepared for the world of CAM software. I use Mach3, and although it comes with some nice wizards, they are a far cry from my needs. For those who have access to it, this article is a short introduction to how to use MasterCAM 9.x to generate a workable G-code for the Mill. It mainly outlines the design process, and provides enough background to allow the reader to experiment and learn its operation. I placed an emphasis on smaller retrofit machines running controllers such as Mach3. PREPARE MODEL GEOMETRY : When creating the model in Solid Edge it is handy to also prepare the .STL for the later verify. Use Parasolid models if possible when dealing with solids and surfaces. Using the AutoCad .dwg or dxf will work also, but this primer is primarily targeting solid modeling CAD systems (this is what I use). After the import, everything will be on level 1. To make things easier it is advantageous to separate the features. In levels, select active level to be the one where the solid is supposed to go. From main menu select SCREEN/CHG LEVELS. Use settings as shown and click OK. XFORM/TRANSLATE/ALL/ENTITIES/DONE The next menu will let you chose the translation method. I mostly use Rectang and Between pts depending on what is needed. If the model needs rotating use: XFORM/ROTATE/ALL/ENTITIES/DONE.
Tags : autocad dwg, model geometry, translation method, mach3, cad systems, design electronics, solid edge, smithy, cam software, dxf, novices, far cry, stl, solids, cnc
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