Seven commonly used CNC parameters in the processing of spare parts

During the processing of spare parts, the instructions issued by the computer control system are used to complete the operation of the machine tool. Through inputting the program, various actions of the lathe are guided. The machining accuracy is high and suitable for the mass production of the same product. The ordinary lathe is manually completed by the operator. Process small batches or products with complex structures.

1. Initialization state

Some G-code modes are automatically set when the machine power is turned on before parts are processed and produced. Set absolute or incremental, rapid or linear motion, plane selection, and feed per minute or per revolution, etc. It is a G code mode that can be specified with a parameter.

2. Canned cycle

Most of these parameters control efficiency during parts machining. For example, part machining requires a chip breaking drilling cycle with a parameter that controls the amount of shrinkage between pecks. The higher the value, the longer the hole will take for the part to machine. In a similar fashion, the deep hole peck cycle has parameters that control the amount of clearance between pecks. Additionally, turning centers for roughing and boring have multiple repeat cycles that have a parameter that controls how far the tool retracts (still feeds) between roughing passes.

3. Data Entry

The parameter controls whether values ​​without decimal points are treated as integers or in fixed format. If set to an integer, a coordinate value of 10 in inches mode will be treated as 10 inches. In fixed format mode it will be treated as 0.0010 inches. When making sizing, this affects the accuracy of the machine's machining of parts and program compatibility between operator entries. Another parameter sets the maximum size of the wear offset adjustment. For example, setting this parameter to 0.02 inches can help minimize operator input errors.

4. Communication and file loading

Parameters control the method by which the program can be transferred to and from the CNC and the equipment/media being used. Common choices include flash drives, memory cards, Ethernet or serial ports. Another parameter determines when the CNC stops loading the program: end of program word or end of file delimiter.

5. Plan Protection

During the production of spare parts, machine setting parameters can be used to prevent specified programs from being modified, deleted and/or displayed. This allows you to protect important programs such as probes, subroutines and custom macros.

6. User Defined Code

Through parameters, parts machining can specify that the selected code will execute a predetermined CNC program. This is important when developing custom macros for canned cycle applications. Another parameter related to custom macros allows you to control the behavior of individual blocks when executing logical and arithmetic commands: skip them or execute them one by one.

7. Imperial - Metric Conversion

The parameter controls what happens when the measurement system mode is switched. With just one selection, the CNC simply moves the decimal point to the right or left (no real conversion). A value of 10.0000 inches becomes 100.000 mm. On the other hand, convert all values, including axis position and offset settings. A value of 10.0000 inches becomes 254.000 mm.