Five Matters Needing Attention in Tool Radius Compensation for Precision Parts Processing
In the process of precision parts processing, it controls the path of the tool center. For convenience, the user always compiles the processing program according to the part contour. Therefore, in order to process the required part contour, the tool center must offset a tool radius value to the inner side of the part: when processing the outer contour, the tool center must offset a tool radius value to the outer side of the part. This CNC device can automatically generate the tool center path in real time according to the part contour and the preset offset parameters, which is called the tool radius compensation function.
1. The establishment and cancellation of radius compensation mode are only valid in C0 or C01 movement command mode. Of course, some systems now support C02 and C03 modes, but in order to prevent errors, it is better not to use C02 and C03 commands in radius compensation setting and cancellation segments.
2. To ensure the safety of tools and workpieces when tool compensation is created or canceled, C01 motion mode is usually used to create or cancel tool compensation. If the tool compensation is established or cancelled by using the C0 movement mode, the programming method of establishing the tool compensation first, then lowering and withdrawing the tool, and then canceling the tool compensation shall be adopted.
3. In order to facilitate coordinate calculation, tangent cut in method or normal cut in method is used to establish or cancel tool compensation when precision parts are processed. When it is inconvenient to cut in and out along the tangent line or normal direction of the workpiece contour, the arc auxiliary program segment can be added according to the situation.
4. In order to prevent the tool from over cutting during the process of establishing and canceling the radius compensation, the starting position and the ending position of the program section for establishing and canceling the tool radius compensation should be on the same side as the compensation direction.
5. In the tool compensation mode, it is generally not allowed to have more than two consecutive segments of non compensated planar motion commands, otherwise the tool will also have dangerous actions such as over cutting.