Which coordinates are used by a CNC machine tool when there is an error in the third cutting tool position?

Which coordinates are used by a CNC machine tool when there is an error in the third cutting tool position?

• A. Relative coordinates
• B. Absolute coordinates
• C. Incremental coordinates
• D. Polar coordinates

Answer: (B)

When a tool position is uncertain, you want a fixed, unchanging reference to re-establish where the tool should be. Absolute coordinates provide that fixed frame, since they specify exact locations relative to the machine’s origin or work origin. By using absolute coordinates to move the tool to a known reference point, you can re-zero or verify the tool position consistently, even after changes or errors with a tool like the third cutting tool. If you used incremental (relative) coordinates, each move is a delta from the current position, so any existing error would tend to carry forward and compound with subsequent moves, making recovery more difficult. Polar coordinates are not the standard method for routine tool positioning and re-reference in typical CNC setups, so they’re not the usual choice for correcting a tool-position error. So, absolute coordinates are the appropriate way to re-establish and verify the tool’s position after an error.

When a tool position is uncertain, you want a fixed, unchanging reference to re-establish where the tool should be. Absolute coordinates provide that fixed frame, since they specify exact locations relative to the machine’s origin or work origin. By using absolute coordinates to move the tool to a known reference point, you can re-zero or verify the tool position consistently, even after changes or errors with a tool like the third cutting tool.

If you used incremental (relative) coordinates, each move is a delta from the current position, so any existing error would tend to carry forward and compound with subsequent moves, making recovery more difficult. Polar coordinates are not the standard method for routine tool positioning and re-reference in typical CNC setups, so they’re not the usual choice for correcting a tool-position error.

So, absolute coordinates are the appropriate way to re-establish and verify the tool’s position after an error.