Programming instructions and instruction formats of FANUC system CNC lathes

Lecture 3: The program format of the FANUC CNC system.

The programming instruction format of the CNC lathe is as follows:

1. G00 and G01

There are two kinds of motion trajectories: straight lines and polylines, and this instruction is only used for point positioning, not for cutting operations.

G01 moves to the target point specified in the instruction in a linear motion according to the specified feed speed and verticality, and is generally used for cutting operations.

2. G02 and G03

G02: Clockwise circular interpolation G03: Counterclockwise circular interpolation.

G04 (Delay or Pause Order).

It is generally used for forward and reverse switching, machining blind holes, stepped holes, and turning grooves.

G17, G18, G19 Plane Selection Command, specifying plane machining, typically used on milling machines and machining centers.

G17: x-y plane, which can be omitted or parallel to the x-y plane.

G18: X-Z plane or parallel plane, only X-Z plane in CNC lathes, no need to specify it.

g19: the y-z plane or the plane parallel to it.

G27, G28, G29 reference point directives.

G27: Return to the reference point, check and confirm the location of the reference point.

G28: Automatically returns to the reference point (past the intermediate point).

G29: Return from a reference point, used with G28.

G40, G41, G42 radius compensation.

G40: Eliminates tool radius compensation.

3. G43, G44, G49 length compensation.

G43: The length is complementing the filial piety of the Ming Dynasty.

g44: length negative compensation.

G49: Remove tool length compensation.

4. G32, G92, G76

G32: Thread cutting.

G92: Fixed cycle for thread cutting.

G76: Thread Cutting Compound Cycle.

5. Turning: G70, G, G73

G71: Axial roughing compound cycle instruction.

G70: Finishing Compound Cycle.

G72: Face turning, radial roughing cycle.

G73: Copy rough turning cycle.

The group of g** commands and their meanings: "modal**" and "general"**: the function of "form**" continues after it is executed, while "general**" only works when the command is received.

The definitions of movement are usually "modal", such as lines, arcs, and loops. Conversely, returning ** like the origin is called "general**".

Each one belongs to its own group. In Modal, the current one will be replaced by the same group that was loaded.

G01 linear interpolation in format G01X(U) Z(W) F; Straight line interpolation moves from the current position to the command position in a straight line and at a command-given rate of movement.

x,z: the absolute coordinate value of the location to which the movement is required. u,w: The incremental coordinate value of the location to which the move is required.

Format: G02(G03)X(U) Z(W) I K F ; g02（g03）x（u）＿＿z（w）＿＿r＿＿f＿＿；

G02 clockwise (CW); G03 Counterclockwise (CCW); x,z is the end point in the coordinate system; u,w the distance between the start and end points; i,k vector (radius value) from the start point to the center point; r Arc range (up to 180 degrees).

Clause.

1. After the cooling is turned on, the NC completes the signal before the next section of the program is executed.

second, if there are two or more m**s in a program, such as program N0003 M11, M12;

It is equivalent to: N0003 M11;

n0004 m12；

In the FANUC program, m** is defined as, accessibility**. m** plays an auxiliary control role in the machine tool.

m** function.

The m00 program stops.

M01 Conditional program stops.

End of M02 program.

M03 spindle rotates forward.

M04 spindle reversed.

M05 spindle stops.

M06 Tool change.

M08 Cool on.

M09 Cooling off.

m10 m14 。M08 Spindle cutting fluid on.

M11 M15 spindle cutting fluid stop.

M18 spindle orientation release.

M19 spindle orientation.

M25 pallet rises.

M29 rigid tapping.

The M30 program ends and returns to the program header.

M31 interlock bypass.

M33 spindle orientation.

The M52 automatic door opens.

M85 workpiece counter plus one.

m98 calls the subroutine.

The m99 subroutine returns a repeat execution at the end of the program.