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How to use radius compensation in machining center?

In machining center, radius compensation is a commonly used function, which allows the tool radius to be taken into account during programming, so as to accurately control the tool path during the actual machining process and avoid machining errors caused by tool wear or size changes. How to use radius compensation in machining center? Here are the basic steps to use radius compensation:

  1. Select the compensation type:
    G41: Tool radius left compensation, suitable for the case where the tool is machining on the left side of the workpiece.
    G42: Tool radius right compensation, suitable for the case where the tool is machining on the right side of the workpiece.
    G40: Cancel radius compensation, used to end the radius compensation state.
  2. Enter the tool radius value:
    Enter the actual radius value of the tool in the radius compensation setting interface of the machine tool. This value is usually half of the tool diameter.
  3. Activate compensation:
    Insert G41 or G42 instructions at the appropriate position in the program to activate radius compensation. For example, if you want to compensate on both the X-axis and the Y-axis at the same time, you can add G41 or G42 instructions at the starting position in the program.
    Radius compensation image of machining center
  4. Adjust compensation value:
    If necessary, the compensation value can be adjusted to adapt to specific machining conditions or compensate for dimensional changes caused by tool wear.
  5. Cancel compensation:
    In the last part of the program, use the G40 command to cancel radius compensation to ensure that no compensation is performed when the tool leaves the workpiece.
  6. Check and test:
    Before actual machining, use simulation software or manual trial run to check whether the program correctly applies radius compensation.
  7. Notes:
    Make sure to activate and cancel radius compensation in G00 or G01 (linear movement) state.
    Avoid activating radius compensation under G02 or G03 (arc or spiral motion) instructions to avoid program errors.
    When using radius compensation, consider tool wear and dimensional changes and adjust the compensation value in time.
    The above steps are based on common CNC programming practices, and the specific operations may vary depending on different machine tool models and control systems. In actual operation, you should refer to the machine tool manual or consult a professional for accurate guidance.

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