The process instructions of CNC programming are roughly divided into those two categories

China's CNC wire cutting machine tools are commonly programmed in 3B program format, and the format is shown in the table.

1. Separator symbol B: Because x, y, and j are all numbers, use the separator symbol (b) to separate them to avoid confusion.

2. Coordinate value (x, y): It is generally stipulated that only the absolute value of the coordinate is entered, and its unit is m, and the following m should be rounded. 3. Counting direction g:

Select the total length of the feed in the X direction for counting, which is called counting X, and is represented by GX; Select the total length of the feed in the Y direction for counting, which is called counting Y, which is represented by Gy.

4. Counting length J: the sum of the projected length (i.e., absolute value) of the processed figure in the counting direction, in m.

5. Processing instruction z: used to express the shape, quadrant and processing direction of the processed graphic. According to these instructions, the control system correctly selects the deviation formula, calculates the deviation, and controls the feed direction of the worktable, so as to realize the automatic processing of the machine tool.

The programming format adopted by CNC wire EDM machine tools is generally 3B format, ie.

bxbybjg()s(n)r

Generally in 3B format, it is now the most widely used and commonly used one, and other new programming methods are less commonly used due to device limitations.

G43, G44, G49—Tool length compensation instruction Format: G43 Z H; Represents the forward compensation of the tool length, and the Z-axis arrival distance Z is the specified value plus the compensation value H. g44 z h ;Represents the negative compensation of the tool length, and the Z-axis arrival distance z is the specified value minus the compensation value h.

g49 z ;or h00 indicates that the tool length compensation is canceled Note: The G43 G44 instruction has nothing to do with G90 G91, and the bias corresponding to the H instruction can be negative or positive. When h is 0, the tool length compensation is canceled.

The value of h can range from 00 to 200Due to the range or inches of the compensation value, and the change of the plus or minus signs of the compensation value, the whole job can be done with G43. , G42, G40—Tool Radius Compensation Instruction Format:

g41 g42】 (g00 g01)(x y ,x z y z )d f ; g40 g00

G100 Priority Instruction for Turret A or Turret B for Individual Cutting, G101 Linear Interpolation in Generative Machining, G102 Circular Interpolation (Front) (CW) in Generative Machining, G103 Circular Interpolation (Front) in Generative Machining (CCW), G107 Spindle Synchronous Tapping, Right-hand Thread, G108 Spindle Synchronous Tapping, Left-hand Thread.

G110 Turret A Constant Circumferential Speed Cutting, G111 Turret B Constant Circumferential Speed Cutting, G112 Arc Thread Turning CW, G113 Arc Thread Turning CCW, G119 Tool Radius Supplement: C-X-Z Plane, G124 Chuck A Effective Origin, G125 Chuck B Effective Origin.

G126 taper mode OFF instruction, G127 taper machining mode ON instruction, G128 M C machining mode OFF instruction, G129 M C machining mode ON instruction, G136 coordinate reversal end or Y-axis mode off, G137 coordinate reversal start, G138 Y-axis mode on.