Believe a lot of friends that undertake FANUC system operation, had encountered the worry that looks for origin, draw up my a bit result now consult for everybody, origin or else searchs to be able to feel vexed to FANUC series after comprehending (some are rodomontade... ^o^ ) . Since be to look for origin, that says what is origin first, origin cent is: Program origin, exercise origin, mechanical origin these 3 diction, say respectively first. Form origin: The datum mark of dimension of the mark on blueprint, of good explanation of it doesn't matter, authority is clear. Exercise origin: By origin fills to be being operated, can set a when decide random movable dot, mechanical shift, nod what fasten for coordinate with this " 0 " dot. When processing work, nod with this undertake machining for datum mark. Explain: 1, on treatment, exercise origin must agree with form origin. 2, alleged origin fills to be being operated, it is to beg a mechanical origin to arrive the operation that XYZ is apart from between origin of each axis exercise, from this the distance that the operation gets, be called " former have a snack to stave off hunger is worth " . Mechanical origin: When OSP is controlled, to know a tool present position, it is on the pump of ball screw drive of XYZ each axis, each contain OSP position detector, detector of this OSP position, can be inside mechanical total travel, produce the numerical value of 7 digit, the mechanical place that OSP can know, it is this numerical value. Good, now again for say origin is returned to (afore-mentioned which origin to return? It is a mechanical origin of course) , method say a the most commonly used kind first. Method the operation essentials of one: 1, will have origin establishment this axis is operated with handwheel, shift arrives near mechanical origin; 2, then, this axis the central direction shift toward mobile limits makes an appointment with 100mm (B axial negative direction moves about 30 degrees; 3, at this moment, nod the position around to move with the speed Xiang Yuan of minutely 230mm above please, the pattern that leaves origin limits 2mm probably stops (B axis makes an appointment with 1 degree of less than) ; 4, return to automatically by origin in origin regression picture can. Method 2 (apply to special machine tool, have Z axis action only) , the mechanical and located origin position when the origin of this kinds of machine is missing is origin position commonly, be in charge of it is the first origin still be the 2nd origin, the error is minimum (my practical experience, can not be unconscious person) , so ah, direct parameter the 4# of 1815 by 0 instead 1 can, of course, should shut power source, machine objective next, gauge a difference 0. 02 how? Be no good! Not be merciful says, the directional shift that Z axis look you need measures poor value can, press afore-mentioned methods next new establishment origin can. Method the 3 unique skill that are me, all-conquering, I still pass without accidentally drop (ah, do not laugh, it is true) . Everybody knows when process designing, when main shaft is machining certain aperture (hypothesis need two sides machines ability but, need to assure homocentric degree) , b axis circumgyrate 180 degrees hind, the instruction absolute value of XY axis does not have a change, but still machine same an aperture, have very good homocentric degree, this is why, original, when set machines coordinate to fasten, we already had been set, 0 degrees of coaxial costs with 180 degrees are additional absolute value is equal to a machine tool the head office Cheng of this axis is long. Good, use this a little bit, axis of my citing X, search to X axis first temporarily origin is used, when B is 0 degrees, x axis shift arrives the exercise origin of our set, treat in the job with Z axis go up or on undesirable material, treatment a bit (can offer measure) , rotate B axis next 180 degrees hind, move X axis again the exercise origin of our set, treat in the job again go up or machine on undesirable material a bit, if around machines positional coincide twice, congratulation you, you search temporarily origin is the true origin that you look for, but reality is callosity, won't have actually so of coincidence, how to do, good say, the poor value that measures treatment twice is divided again with 2 (not won't clear) , be the value that we need to adjust, next X axial corresponding direction shift differs a value to be apart from, press a method 2, new establishment origin with respect to OK, corresponding, other axis also is to manage together. The place on put together is narrated, the method is best, method the 2 machines with be applied to particular, method 3 very useful, but the person that did not organize a course is not easy understanding, everybody chooses agile application. Statement: Above method applies to FANUC system absolutely. If encounter commutative electric machinery,wait for case of course, when mechanical origin position deflection, must redo treats provided origin to affirm, and be in 1850 parameter, after set error is worth, work by laws of afore-mentioned its one party again can. CNC Milling
CNC Machining