The processability that numerical control milling machines grand program and CAD/CAM software generating program can be comparative

1 parameter, also have hard change greatly. Experience proves, because ability of interference rejection of RS232 mouth communication is limited, its still involve transmission line on border of transmission effect fructification whether screen is good, whether length moderate, machine tool and computer two end earthed are good etc, baud rate is higher, transmit do not stabilize more, actual in often be forced to restrict in 9600 lower even, come so the treatment efficiency below DNC online means more sell at a discount. Next, say from the level that the user uses, a future life of use CAD/CAM software becomes cutter track and program dispute to often hold easy job, but the principle that analyses cutter track of CAD/CAM software computation, know it keeps the corrupt practice with be put proper. In CAD/CAM soft assorted, no matter construct regulation or irregular curved surface, have the process of operation of a maths, inevitable also existence is worn processing of calculative sum of errors, and when building three-dimensional treatment cutter track to its, software is the treatment parameter of the treatment way that chooses according to you, set, the machining error that combines a set (or the computational precision) that calls curved surface, make cutting tool and treatment surface contact a dot (photograph node or tangent dot) pointwise shift completes treatment, from look substantially, be worth the process that every method uses the edge inside limits to approach curved surface point-blank in the error that allow namely actually. Nature of so aleatoric curved surface can make do, and also be completely sound practice, but in treatment regular curved surface is like spherical when, a few problems appeared on craft. Because CAD/CAM software is tectonic,the place of rock-bottom maths model of curved surface is restricted, also give birth to those who become cutter track to approach principle place to be restricted to curved surface as a result of CAD/CAM software, when going to rectify circle or circular arc truly in fact, software cannot be actually here " true full circle or circular arc " , generated program is not G02/G03 instruction, however G01 pointwise is approached form " round " -- can imagine to use N edge form goes approaching a circle, just this N is very tremendous just. If full circle or circular arc are to repose inside G18 or G19 plane, do not have an opportunity to generate G02/G03 to dictate more. This also is explaining why the program that CAD/CAM software creates " inherent " giant and clinking. When the program is carried out, two every of photograph adjacent are approached numerical control system should have linear interpolation operation between the dot, computer workload of the system is tremendous, mirror to the machine tool, inevitable expression is motion slow, abrupt. Following plan institute are shown, it is same hemisphere it seems that apparently, but the method building a model that has a variety of differring is actually when CAD, graph 1 be regard bus as the circular arc of a paragraph of 1/4 inside ZX plane, rotate for axes with Z axis the hemisphere curved surface that 360º reachs; Graph 2 be regard bus as the circular arc of a paragraph of 1/2 inside XY plane, rotate for axes with X axis the hemisphere curved surface that 180º reachs. Even if introduce hypostatic model (like) of and so on of Pro/E, SolidWorks, on the mathematical mechanism that in its rock-bottom draft constructs, also have similar difference. Can see from this, hemisphere music is made below two kinds of circumstances and UV streamline is disparate, all sorts of CAD/CAM software are when the cutter track that makes precision work of hemisphere curved surface, also put in the difference necessarily. Say simply, even if the Cima-tron software that is considered as one of software of the most crackajack numerical control process designing generally by industry, seldom also counting a circumstance to fall only (the graph 1) of following faces, and with Surmill means (similar with Mastercam medium curved surface streamline is machined) treatment, judgement of Cimatron software ability gives here is actually " true full circle " , itself of generated cutter track contrail just is " true full circle " , the program that the aftertreatment comes out talent is enough basically form by G02/G03 instruction. If use the other way taking a knife such as Srfpkt, 3D_step, it is the result that approachs with G01 absolutely. Cite the case with very simple another again, use milling cutter for example with aperture of the circle inside helix means treatment, use grand program not only the course is very short, trifling does not arrive 20 rows! And F=2000mm/min of speed of the feed when the machine tool moves actually can keep special even, fast helix moves; And in Cimatron software, although pass the Helicprf in using User of exterior user function, although also can build similar cutter track, but cutter track is a basis given the error is worth (give normally 0.

01) is chased with G01 paragraph those who approach, program byte number is greater than grand program at all two amounts class, and although keep whole process,the person arrives in the controller of the machine tool, the rate when the machine tool moves actually is prime go up not to go, return below in F600 not apparent, if F value hits F1200 left and right sides, can see the machine tool is in apparent " asp " . For the high speed machine tool that supports NURBS curve interpolation to numerical control system, if use the CAD/CAM software that has high speed to machine a function to cooperate process designing, do not have too big question of course; But the problem is from beginning to end for the numerical control system to great majority. Actually CAD/CAM software firm did not realize this problem impossibly also, in fact, each CAD/CAM software also are caught offerred a few other ways to try to improve to this, but not be going up at all solve congenital problem, be in however " acquired " the make an issue of on link. Well-known, the knife that CAD/CAM software undertakes the principle of process designing is to generate to include dinkum geometry import only above all dot file (namely) of cutter track contrail, this process to using person for often be tiring-room, opaque, for example the CL file of Pro/E (the CLF file of Cutter Location File) , UG, NCI file of Mastercam, the APT file of Cimatron, should pass a very important segment next namely aftertreatment, ability creates the program of true illness. CAD/CAM software can do, changing a knife namely dot file (the cutter track contrail that approachs a curve point-blank with G01 namely) below premise, in the make an issue of on the aftertreatment. For example in the link of Mastercam software aftertreatment, the smallest radius is worth set of the person that allow to use and a future life of value of the biggest radius dictates into G02/G03, be approached actually namely with G02/G03 (saying well and truly to answer is " plan to close " ) a certain number of Duan Zhi line segment of photograph adjacent, reduce program byte in order to achieve, raise a machine tool the purpose of actual traversal speed. And Cimatron software also is the method that uses likeness, the GPP aftertreatment that the person that use namely need not use normally, use the aftertreatment software IMs with very professional another however, this is a tripartite software, can outside hang on numerous famous CAD/CAM software to move, the person that use can spend a body to be ordered according to his need, the setting suits his aftertreatment option most, average nevertheless software user has the limits of authority of moving IMS software rarely. Two kinds of aftertreatments undertake the GPP that the author once was aimed at Cimatron software technically 2002 and IMS research, undertake be machininged actually check and be assessmented in factory of mould of a stage endowment, write. Had written an in-house article, conclusion is: Improvement is bigger, but cannot from go up at all solve. Does on the aftertreatment make an issue of have an essential malpractice: ? Does lax of  ⒚ brandish seek  of vomit of Qi of thistle of Huan ⒏ herd to block emperor of  of old Hui of meal Liu １ up to steal Mian Yong does collect of barium of smooth  of bogus of  of bank of post an ancient wine vessel made of horn attack does  of willful  Ta lay arm of  of Jia of  of Yan of Peng of Nai of badger of Mendelevium of the Gu Lou that change cape? CNC Milling