1.F functionF function instruction is used at controlling cutting feed. In the program, have two kinds of use methods. (1) every turn feedG95 F~ of process designing formatThe number at the back of F is denotive it is main shaft every turn feed, the unit is Mm/r. Exemple: G95 F0.2 states feed is 0.2 Mm/r. (2) minutely feedG94 F~ of process designing formatThe number at the back of F is denotive it is minutely feed, the unit is Mm/min. Exemple: G94 F100 states feed is 100mm/min. 2.S functionS function instruction is used at controlling main shaft rotate speed. ～ of S of process designing formatThe number at the back of S shows main shaft rotate speed, the unit is R/min. Be in a preserving line on the machine tool of fast function, s function instruction still is like next action. (1) top rotate speed is restricted～ of G50 S of process designing formatThe number at the back of S is denotive it is top rotate speed: R/min. Exemple: G50 S3000 states limitation of top rotate speed is 3000r/min. (2) constant line fast control～ of G96 S of process designing formatThe number at the back of S is denotive it is constant linear velocity: M/min. Exemple: G96 S150 states cutting nods linear velocity to control in 150 M/min. (3) constant line fast cancel～ of G97 S of process designing formatThe number at the back of S states constant linear velocity controls the main shaft rotate speed after cancelling, if S was not appointed, the final cost that withholds G96. Exemple: G97 S3000 expresses 3000 R/min of rotate speed of the main shaft after fast control cancels constant line. 3.T functionT function instruction is used at choosing to machine place to use cutting tool. ～ of T of process designing formatThere are two digits to show the cutting tool number of a choice normally at the back of T. But also have 4 digit word is used at the back of T, before two are cutting tool date, hind two are date of compensation of cutting tool length, it is date of compensation of radius of circular arc of point of a knife. Exemple: T0303 expresses to choose 3 knives and cost of compensation of length of 3 cutting tool and radius of circular arc of point of a knife to compensate a value. T0300 expresses to cancel cutting tool compensation. 4.M functionM00: The program pauses, usable NC starts an order (CYCLE START) make the program continues to move; M01: The plan pauses, with M00 action likeness, but M01 can use a machine tool ” optional stop pushbutton ” the alternative is effective; M03: Main shaft arranges hour hand to rotate; M04: Main shaft is anticlockwise rotate; M05: Main shaft rotates stop; M08: Cooling fluid leaves; M09: Cooling fluid closes; M30: The program stops, program restoration arrives position of rest.