The main effect that nods to the knife in CNC Machining reachs the method that chooses to the knife certainly

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To knife dot, namely the start of the program, it is the cutting tool when CNC Machining rises relative to what workpiece moves, if pursue (1) be shown. To the knife when numerical control process designing the dot chooses to should consider the following: Graph (1) (1) make not program process designing is simple. (2) search easily on numerical control machine tool to knife dot. (3) the machining error that cause is the smallest. (4) in machining a process, facilitate examination. (5) as far as possible the design at the spare parts fiducial or fixed position is standard coincide. For example, with the spare parts that aperture locates, it is better to regard pair of knives as the dot with the central aperture of aperture, can reduce fixed position error. OK to knife dot can set in be gotten on by treatment spare parts, also can set in clamping apparatus to wait auxiliary and fiducial on, but must the fixed position with the spare parts is standard the measure with have certain concerns, such ability assure the correlation of department of machine tool coordinate and workpiece coordinate department. (6) the computation that should facilitate the coordinate that nods to the knife is worth. (7) the feed in making machine a process as far as possible or the line that withdraw a knife are the shortest, facilitate change a knife. Go to the lavatory for treatment, choose origin of workpiece process designing to be pair of knives to nod commonly. To the knife the dot is the start of the program not only, also often be the terminus of the program. Normally, use world coordinate system to examine to be apart from value of coordinate of machine tool origin to examine to knife dot the precision to the knife. To the knife the dot searchs correctness affects treatment precision directly, the alternative that seeks square way asks to decide according to precision of appearance of spare parts geometry and spare parts treatment. Commonly some of enterprise searchs to rise precision or decrease search time, often use optics or electronic type to seek an edge implement will undertake searching. CNC Milling CNC Machining