CNC G Codes

Code name-brief description of function

G00------Quick positioning

G01------Linear interpolation

G02------clockwise circular interpolation

G03------Counterclockwise circular interpolation

G04------Timed pause

G05-------arc interpolation through the intermediate point

G07------Z spline curve interpolation

G08------Feed acceleration

G09------Feed deceleration

G20------Subroutine call

G22------Radius dimension programming method

G220-----Use on the system operation interface

G23------diameter size programming method

G230-----Use on the system operation interface

G24------End of subroutine

G25------Jump processing

G26------Cycle processing

G30------Magnification cancellation

G31-------rate definition

G32------Equal pitch thread cutting, inch system

G33------Equal pitch thread cutting, metric system

G53, G500-Set the workpiece coordinate system to cancel

G54------Set the workpiece coordinate system 1

G55------Set the workpiece coordinate system 2

G56------Set the workpiece coordinate system three

G57------Set the workpiece coordinate system four

G58------Set the workpiece coordinate system five

G59------Set the workpiece coordinate system 6

G60------accurate path method

G64------Continuous path mode

G70------Inch size inch

G71------Metric size mm

G74------Return to reference point (machine zero point)

G75------Return to the zero point of programmed coordinates

G76------Return to the starting point of programmed coordinates

G81------External canned cycle

G331-----Thread canned cycle

G90------absolute size

G91------ relative size

G92------Prefabricated coordinates

G94------Feed rate, feed per minute

G95------feed rate, feed per revolution

G00—Quick positioning

Format: G00 X(U)__Z(W)__

Explanation: (1) This instruction makes the tool quickly move to the specified position according to the point control mode. The workpiece must not be moved during the movement

For processing.

(2) All the programmed axes move at the speed defined by the parameters at the same time. When a certain axis finishes the programmed value, it will stop, and the other

The axis continues to move,

(3) The non-moving coordinates do not need to be programmed.

(4) G00 can be written as G0

Example: G00 X75 Z200

G0 U-25 W-100

First, X and Z walk 25 quickly to point A at the same time, and then walk 75 to point B quickly in the Z direction.

G01—Linear interpolation

Format: G01 X(U)__Z(W)__F__(mm/min)

Explanation: (1) This command makes the tool move to the specified position in linear interpolation mode. Movement speed is commanded by F

Feed rate. All coordinates can be operated in linkage.

(2) G01 can also be written as G1

Example: G01 X40 Z20 F150

Two-axis linkage from point A to point B

G02—Inverse circular interpolation

Format 1: G02 X(u)____Z(w)____I____K____F_____

Explanation: (1) When X and Z are in G90, the arc end point coordinate is the absolute coordinate value relative to the programmed zero point. At G91,

The arc end point is the incremental value relative to the arc start point. Regardless of G90 or G91, I and K are the coordinate values of the arc end point.

I is the X-direction value, and K is the Z-direction value. The coordinates of the center of the circle shall not be omitted in the circular interpolation, unless it is programmed in other formats.

(2) When G02 instruction is programmed, it can directly edit the quadrant circle, full circle, etc.

Note: When the quadrant is exceeded, the gap compensation will be automatically performed. If the gap compensation and the actual backlash of the machine tool are entered at the end of the parameter area

Great disparity will cause obvious cut marks on the workpiece.

(3) G02 can also be written as G2.

Example: G02 X60 Z50 I40 K0 F120

Format 2: G02 X(u)____Z(w)____R(+\－)＿＿F＿＿

Note: (1) Cannot be used for programming of a full circle

(2) R is the radius of the R arc on one side of the workpiece. R is a sign, "+" means that the arc angle is less than 180 degrees;

"-" means that the arc angle is greater than 180 degrees. The "+" can be omitted.

(3) It is based on the coordinates of the end point. When the length between the end point and the starting point is greater than 2R, a straight line is used instead of an arc.

Example: G02 X60 Z50 R20 F120

Format 3: G02 X(u)____Z(w)____CR＝＿＿(radius)F__

Format 4: G02 X(u)____Z(w)＿＿D＿＿(diameter)F___

These two programming formats are basically the same as format 2.

G03—Circular interpolation

Note: The format is the same as the G02 command except that the arc rotation direction is opposite.

G04—Timed pause

Format: G04__F__ or G04 __K__

Note: The processing movement is paused. After the time is up, the processing will continue. The pause time is specified by the data following F. The unit is seconds.

The range is 0.01 seconds to 300 seconds.

G05—Circular interpolation through the intermediate point

Format: G05 X(u)____Z(w)____IX_____IZ_____F_____

Explanation: (1) X and Z are the coordinates of the end point, and IX and IZ are the coordinates of the intermediate point. Others are similar to G02/G03

Example: G05 X60 Z50 IX50 IZ60 F120

G08/G09—Feed acceleration/deceleration

Format: G08

Explanation: They occupy one line alone in the program segment. When running to this segment in the program, the feed rate will increase by 10%.

If you want to increase by 20%, you need to write two separate paragraphs.

G22 (G220)-Radius dimension programming method

Format: G22

Note: if it occupies a line alone in the program, the system runs in radius mode, and the following values in the program are also

Based on the radius.

G23(G230)—diameter size programming method

Format: G23

Note: if it occupies a line alone in the program, the system runs in diameter mode, and the following values in the program are also

Based on the diameter.

G25—Jump processing

Format: G25 LXXX

Note: When the program executes to this section of program, it will transfer the program section designated by it. (XXX is the program segment number).

G26—Circular processing

Format: G26 LXXX QXX

Note: When the program is executed to this section of the program, the specified section starts to this section as a loop body,

The number of cycles is determined by the value following Q.

G30—magnification cancellation

Format: G30

Description: Occupy a line alone in the program, and use it with G31 to cancel the function of G31.

G31-definition of magnification

Format: G31 F_____

G32—equal pitch thread processing (English system)

G33—equal pitch thread processing (metric system)

Format: G32/G33 X(u)____Z(w)____F____

Explanation: (1) X and Z are the coordinates of the end point, and F is the pitch

(2) G33/G32 can only process single-pole, single-start threads.

(3) The change of X value can process taper thread

(4) When using this command, the spindle speed cannot be too high, otherwise the tool wear will be large.

G54—Set workpiece coordinate 1

Format: G54

Note: There can be several coordinate systems in the system, G54 corresponds to the first coordinate system, and its origin position value is in the machine tool

Set in the parameters.

G55—Set workpiece coordinate 2

Same as above

G56—Set workpiece coordinate three

Same as above

G57—Set Workpiece Coordinate Four

Same as above

G58—Set Workpiece Coordinate Five

Same as above

G59—Set Workpiece Coordinate 6

Same as above

G60—accurate path method

Format: G60

Note: In the actual machining process, when several actions are connected together, when the exact path is used for programming, then the

During the next processing, there will be a buffering process (meaning deceleration)

G64—Continuous path mode

Format: G64

Note: Relative to G60. Mainly used for rough machining.

G74—Return to reference point (machine zero point)

Format: G74 X Z

Explanation: (1) No other content shall appear in this paragraph.

(2) The coordinates appearing after G74 will return to zero with X and Z in turn.

(3) Before using G74, make sure that the machine tool is equipped with a reference point switch.

(4) Single-axis zero return is also possible.

G75—Return to the zero point of programmed coordinates

Format: G75 X Z

Description: Return to the zero point of programming coordinates

G76—Return to the starting point of programmed coordinates

Format: G76

Description: Return to the position where the tool starts processing.

G81—Outer circle (inner circle) canned cycle

Format: G81__X(U)__Z(W)__R__I__K__F__

Explanation: (1) X, Z are the coordinate values of the end point, and U, W are the incremental value of the end point relative to the current point.

(2) R is the diameter to be machined of the starting point section.

(3) I is the feed for rough turning, K is the feed for fine turning, I and K are signed numbers, and the signs of the two should be the same.

The sign convention is as follows: cutting from the outer center axis (turning the outer circle) is "-", otherwise it is "+".

(4) Different X, Z, R determine switches with different outer circles, such as: taper or no degree,

Positive taper or reverse taper, left cutting or right cutting, etc.

(5) F is the cutting speed (mm/min)

(6) After processing, the tool stops at the end point.

Example: G81 X40 Z 100 R15 I-3 K-1 F100

Processing process:

1: G01 feed 2 times I (the first cut is I, the last cut is I+K finishing), deep cutting:

2: G01 two-axis interpolation, cutting to the end section, if the machining is finished, it will stop:

3: G01 retracts the knife I to a safe position, and at the same time performs the auxiliary cutting surface smoothing

4: G00 quickly feeds to the outside of high working surface I, and reserves I for the next step of cutting, and repeats to 1.

G90—Programming in absolute value mode

Format: G90

Explanation: (1) When G90 is programmed into the program, all the coordinate values programmed afterwards are all based on the programmed zero point.

(2) After the system is powered on, the machine tool is in G state.

N0010 G90 G92 x20 z90

N0020 G01 X40 Z80 F100

N0030 G03 X60 Z50 I0 K-10

N0040 M02

G91—Incremental programming

Format: G91

Note: When G91 is programmed into the program, all subsequent coordinate values are calculated using the previous coordinate position as the starting point

The programmed value of the movement. In the next segment of the coordinate system, the previous point is always used as the starting point for programming.

Example: N0010 G91 G92 X20 Z85

N0020 G01 X20 Z-10 F100

N0030 Z-20

N0040 X20 Z-15

N0050 M02

G92—Set the workpiece coordinate system

Format: G92 X__ Z__

Explanation: (1) G92 only changes the coordinate value currently displayed by the system, does not move the coordinate axis, and reaches the set coordinate

The purpose of origin.

(2) The effect of G92 is to change the displayed tool nose coordinate to the set value.

(3) The XZ behind G92 can be programmed separately or all.

G94—Feed rate, feed per minute

Note: This is the default state of the machine at startup.

G20—Subroutine call

Format: G20 L__

N__

Explanation: (1) After L is the program name after N of the subprogram to be called, but N cannot be input.

Only numbers 1~99999999 are allowed after N.

(2) Contents other than those described above must not appear in this section of the program.

G24—return at the end of the subroutine

Format: G24

Explanation: (1) G24 indicates the end of the subroutine, and returns to the next section of the program that called the subroutine.

(2) G24 and G20 appear in pairs

(3) No other commands are allowed in this section of G24.

Example: Use the following example to illustrate the parameter transfer process in the subroutine call process, please pay attention to the application

Program name: P10

M03 S1000

G20 L200

M02

N200 G92 X50 Z100

G01 X40 F100

Z97

G02 Z92 X50 I10 K0 F100

G01 Z-25 F100

G00 X60

Z100

G24

If you want to call multiple times, please use the following format

M03 S1000

N100 G20 L200

N101 G20 L200

N105 G20 L200

M02

N200 G92 X50 Z100

G01 X40 F100

Z97

G02 Z92 X50 I10 K0 F100

G01 Z-25 F100

G00 X60

Z100

G24

G331—Thread processing cycle

Format: G331 X__ Z__I__K__R__p__

Explanation: (1) X-direction diameter changes, X=0 is straight thread

(2) Z is the thread length, absolute or relative programming can be done

(3) I is the run-out length in the X direction after the thread is cut, ± value

(4) The diameter difference between the outer diameter of the R thread and the root diameter, positive value

(5) K pitch KMM

(6) Cycle processing times of p thread, that is, cut in several cutters

Tips:

1. The depth of each feed is R÷p and rounded, and the last cut does not feed to smooth the thread surface

2. The name of the I value is determined according to the positive and negative direction of the internal thread run-out along the X direction.

3. The starting position of the thread processing cycle is to align the tool tip with the outer circle of the thread.

Example:

G4 f2

G0 x30 z0

G331 z-50 x0 i10 k2 r1.5 p5

G0 z0

M05