A comprehensive guide to modifying tool compensation with CNC programming software

Modifying the tool compensation is a key operation in CNC machining, which directly affects the machining accuracy and product quality. The following are detailed methods and precautions for modifying tool compensation in different numerical control systems.

I. Basic Modification Steps

1. FANUC system tool repair modification method

The FANUC system uses the G10 command to modify the tool compensation. The specific format is as follows:

Modify length geometry compensation: G90 G10 L10 Pp R_

Modify length wear compensation: G90 G10 L11 Pp R_

Modify the radius geometry compensation: G90 G10 L12 Pp R_

Modify radius wear compensation: G90 G10 L13 Pp R_

Here, Pp represents the tool compensation number, and R_ is the compensation value ‌

2. Modification methods for tool compensation in SIEMENS system

Operating steps of the SIEMENS system

Enter the "Processing" operation area

Select the "Tool Compensation" function

Enter the new T- number (1-32000)

Enter the compensation value ‌ in the tool compensation parameter window

3. Tool compensation modification Method for Huazhong Numerical Control System

Switch to manual mode

Press the [Settings] button to enter the tool compensation interface

Press the [Up and Down] keys to select the tool supplement number

Manually rotate the Z-axis to the tool tip point to touch the tool setting face of the workpiece

Enter the required knife length ‌ according to the [Current position] menu

Ⅲ. Precautions and Common Issues

1. Safety precautions ‌ :

When modifying parameters, pay attention to the decimal point position to avoid misoperation ‌

It is recommended to execute the program in single-section mode and observe the changes in the program ‌

Back up the original parameters before modification to prevent data loss

2.Frequently asked questions ‌ :

Data over-limit ‌ : modify parameter P5013 to adjust the compensation limit ‌

Dimensional deviation ‌ : the two-step tool correction method is adopted, first eliminating rough machining deformation and then fine finishing ‌

Overcutting issue ‌ : Check whether the tool radius compensation value is consistent with the actual tool size ‌

3. Precision control techniques ‌ :

Absolute programming is adopted to ensure dimensional accuracy ‌

For important axial dimensions, absolute programming ‌ is preferred

Before processing, test cut one piece first, measure the key dimensions and then mass-produce ‌

Ⅳ. Practical Skills

1.FANUC system display Settings ‌ :

Setting parameter P3104#6(DAL) to 1 enables the absolute coordinates to display the programmed position ‌

 2.SIEMENS system skills ‌ :

Activate ISO mode using the G291 command, compatible with other system programs ‌

3. Huazhong numerical control skills ‌ :

Perform positive or negative offsets (zero-point movement) on the preset axis coordinates through "incremental input" ‌。