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Use a face mill when possible for all but the smallest part. A smaller finish pass ensures a flat surface and good surface finish. It is used to cut away excess material and finish the highest flat face of the part.Depending on how much stock is removed, several roughing cuts may be required. Facingįacing is often the first machining operation. In this book, rapid moves are shown as dashed lines and feed moves as solid. Toolpath Centerline represents the actual coordinates in the CNC program.
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Z Stock Allowance is the material remaining on the finished floor of the part to be removed by subsequent operations. XY Stock Allowance is the material remaining on the finished wall of the part to be removed by subsequent operations. Stepover sets how much material the tool removes with each pass in the XY direction. This illustration shows one pass, but for deeper cuts or harder materials, many passes may be required to cut to the final depth.ĭepth is the final cutting depth of the machining operation. Stepdown is the depth of material removed with each cutting pass. This value is used as the reference plane for depths. Top of Stock is the top of the finished face of the part. No rapid motion occurs below this height. 250in above the top of the finished part face.įeed Height is the last height the tool rapids to before starting to feed into the cut. Rapid Height is the second height the tool rapids to, and the height the tool retracts to between moves (unless set higher to clear clamps). It is usually set 1.000in above the top of stock because this makes it easier to see if the tool length offset register was set properly. Figure 4 shows parameters common to 2D tool paths.Ĭlearance Height is the first height the tool rapids to on its way to the start of the tool path.
CONTOUR CAM CNC SOFTWARE
Though the terminology and ways of working vary widely, all CAD/CAM software needs the same basic information to function. In this article, we describe 2D toolpath terminology with all details include milling, drilling, tapping and etc.