Introduction to common instructions for programming and operation of CNC lathes

1.f function

The f function command is used to control the cutting feed. In the program, there are two ways to use it.

(1) Feed per revolution

Programming format g95f~

The number after f indicates the feed per revolution of the spindle, and the unit is mm/r.

Example: g95f0.2 means the feed rate is 0.2mm/r.

(2) Feed per minute

Programming format g94f~

The number behind f indicates the feed per minute, and the unit is mm/min.

Example: g94f100 means the feed rate is 100mm/min.

2.s Function (Guide: Waterjet Technology Principle and Advantage Analysis)

s function command is used to control the spindle speed.

Programming format s～

The number after

s indicates the spindle speed, and the unit is r/min. On the machine tool with constant line speed function, the s function command has the following functions.

(1) Maximum speed limit

Programming format g50s～

The number after

s indicates the maximum speed: r/min.

Example: g50s3000 means that the maximum speed is limited to 3000r/min.

(2) Constant line speed control

Programming format g96s～

The number after

s indicates a constant linear velocity: m/min.

Example: g96s150 means that the linear speed of the cutting point is controlled at 150m/min.

(3) Constant line speed cancellation

Programming format g97s～

The number after s indicates the spindle speed after the constant line speed control is cancelled. If s is not specified, the final value of g96 will be retained.

Example: g97s3000 indicates that the spindle speed is 3000r/min after the constant line speed control is cancelled.

3.t function

t function command is used to select the tool used for processing.

Programming format t～

There are usually two digits after t to indicate the selected tool number. But there are also four digits after t, the first two are the tool number, the last two are the tool length compensation number, and the tool nose arc radius compensation number.

Example: t0303 means to select the length compensation value of No. 3 tool and No. 3 tool and the compensation value of tool nose arc radius.

t0300 means cancel tool compensation.

4.m function

m00: The program is paused, and the nc start command (cyclestart) can be used to continue the program;

m01: plan to pause, similar to m00, but m01 can use the machine's optional stop button to select whether it is valid;

m03: The main shaft rotates clockwise;

m04: The main shaft rotates counterclockwise;

m05: Spindle rotation stops;

m08: Coolant on;

m09: Coolant off;

m30: The program is stopped and the program is reset to the starting position.

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