Cutter Comp Left (G41)

Definition

Compensates tool to the left of the toolpath. Left compensation offsets the tool center to the left of the programmed contour relative to travel direction.

Formula / Rule

• Activate G41 with a safe lead-in long enough for the control to calculate tool center shift.
• Keep tool radius data current before enabling compensation on production parts.

Typical Range

• Use it for contour finishing and wear adjustment when the tool must stay on the left side of the path.

Shop-floor Scenarios

• Use a linear or arc lead-in before the finished wall.
• Measure the first part and correct wear in the offset table instead of reposting code.

Common Errors / Troubleshooting

• If the controller alarms, check lead-in length, offset number, and active plane.
• If wall size drifts, confirm offset table values, tool wear, and contour direction.

Related Tools

• G/M Code Reference
• G-code Viewer