CNC machining center is commonly used the distinction of the instruction and process designing skill

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As the progress of the development of science and technology and society, people is higher and higher to the function of the product and quality requirement, make numerical control machine tool applies what already got fixed rate to gain ground thereby, and high-powered efficient machining center also becomes social place to need gradually. Through machining center of a few years actual application and education practice are reached fumble, the author comes out his experience and experience summary, hope to be edified somewhat to wide readership. 1. G04X of stop instruction of of short duration (U) _/P_ is to show cutting tool suspends time (feed stops, main shaft does not stop) , the numerical value after address P or X is suspensive time. The numerical value at the back of X should be taken decimally, otherwise the one thousandth computation with this numerical value, with the second (S) for the unit, numerical value cannot be taken at the back of P decimally (namely integer expresses) , with millisecond (Ms) for the unit. For example, g04 X2.

0; or G04 X2000; suspend 2 seconds G04 P2000; but in certain aperture the department processes an instruction in (reach G89 like G82, G88) , to make sure the coarse of essence of life of hole bottom is spent, when cutting tool treatment comes need to have suspensive time when hole bottom, right now practicably location P expresses, if use address X to express, control a system to think X is value of X axis coordinate undertakes executive. For example, g82X100.

0Y100.

0Z-20.

0R5.

0F200P2000; bore (100.

0, 100.

0) suspend 2 seconds G82X100 to hole bottom.

0Y100.

0Z-20.

0R5.

0F200X2.

0; Bore (2.

0, 100.

0) won't pause to hole bottom. 2. The distinction of M00, M01, M02 and M30 and connection M00 are a program stop instruction of termless of short duration. The program is carried out come here feed stops, main shaft stops turn. Start a program afresh, must answer first? Below Jian OG condition, press CW (main shaft is turning) the main shaft that start, return AUTO condition then, press START bolts ability starts a program. M01 suspends dictating optionally for the program. The OP STOP on Control Panel must be opened to bolt ability is carried out before the program is carried out, the effect after carrying out and M00 are identical, should start a program afresh Alexandrine. M00 and M01 often use at machining midway work measure examine or discharge bits. M02 ends an instruction for the main program. Carry out come here instruction, feed stops, main shaft stops, cooling fluid is shut. But program cursor stops in program fine. M30 ends an instruction for the main program. The function is the same as M02, different point is, cursor returns program head position, no matter whether there still is other block after M30. 3. D of compensating parameter of identical cutting tool, H has the sense of address D, H same function, OK and aleatoric crossing-over, they express to the address name of register is compensated in numerical control system, but how much is specific compensation cost, the key is by the compensation at the back of them date address is decided. It is nevertheless in machining center, to prevent to make mistake, stipulate H is cutting tool length to compensate an address artificially commonly, amend order from 1 ～ 20, d compensates an address for cutting tool radius, compensation date begins from 21 (the knife library of 20 knives) . For example, g00G43H1Z100.

0; G01G41D21X20.

0Y35.

0F200; 4. The mirror dictates the mirror machines instruction M21, M22, M23. When having a mirror to X axis or Y axis only, the order taking a knife when cutting (suitable mill and go against mill) , knife filling direction, circular arc interpolation turns to metropolis and effective program contrary, if pursue,1 is shown. When having a mirror to X axis and Y axis at the same time, take knife order, knife filling direction, circular arc interpolation changes direction all changeless. Attention: After use mirror dictates, must undertake cancelling with M23, lest affect the program from the back. Below G90 mode, use mirror or cancel to dictate, want to return workpiece coordinate to fasten origin ability to use. Otherwise, numerical control system is imponderable the athletic contrail from the back, can appear to take knife appearance in disorder. Must execute a hand to move origin revert operation to give at this moment solve. Main shaft changes direction not to change as mirror instruction. Graph the knife when 1 mirror fills, suitable inversion is changed 5. Circular arc interpolation dictates G02 is interpolation of suitable hour hand, g03 is anticlockwise interpolation, in XY plane, the form is as follows: G02/G03X_Y_I_K_F_ or G02/G 03 X_Y_R_F_ , among them X, Y is coordinate of circular arc terminus, the increment size that I, J is circular arc start to go up in axis of X, Y to the centre of a circle, r is circular arc radius, f is feed. In the attention when circular arc cutting, 180 ° of Q ≤ , r is be worth; Q>180 ° , r is negative worth; The designation of I, K also can be appointed with R, when both when be being appointed at the same time, r statement is first, i, K is invalid; R CNC Milling CNC Machining