Configuring AXA DXL Correction for a Swiveled B Axis

After selecting the workpiece-coordinate correction mode, DXL changes the turned diameter and DZL changes axial depth without forcing the operator to calculate the components created by a head at B45°. Keep the existing tool-coordinate mode only when the control calculates the transformed offsets or the programmer supplies both components.

Correction-mode selection

1. Before anything else, confirm that the head is at the programmed B45° orientation and that the active tool, cutting edge, work offset, and turning transformation match the test cut. Do not move on until the displayed active states agree with the NC program.
2. Open the NC-program function labeled Turndaten corr and identify the active correction coordinate system.
3. If the mode is TCO, do not enter an isolated DXL value expecting a pure machine-X diameter change. With an inclined tool axis, the control transforms that tool-oriented vector and produces motion in both X and Z.
4. Select the workpiece-coordinate option when the objective is to correct the finished diameter or axial depth directly. The interface description contains two labels for this choice: the selection is identified as WPC, while the recommended workpiece-coordinate mode is called WCO. Treat the mode description—not the abbreviation alone—as decisive. Confirm on the control that the selected option applies corrections in the workpiece coordinate system.

Baseline measurement branch

1. Make a controlled finish or witness cut using the same tool orientation and cutting conditions that produced the error.
2. Measure the actual diameter and compare it with the target diameter. Record the signed deviation using the control's established wear-correction convention; the required sign depends on how that installation defines positive tool wear and diameter entry.
3. If the diameter is wrong but the axial feature is correct, continue with workpiece-coordinate DXL.
4. If the axial depth is wrong but the diameter is correct, continue with workpiece-coordinate DZL.
5. If both dimensions are wrong, record the two deviations separately. Entering one tool-oriented correction and accepting its projection into both axes does not independently control two dimensions.
6. If repeated cuts change without an offset edit, stop the correction process and inspect tool seating, insert condition, thermal drift, part clamping, and transformation state. An unstable baseline cannot be corrected reliably with geometry or wear data.

Workpiece-coordinate correction procedure

1. Select the workpiece-coordinate correction option in Turndaten corr. Confirm that the display identifies the correction as workpiece-based before changing a value.
2. For a diameter error, enter the required incremental change in DXL. Leave DZL unchanged when axial depth already measures correctly.
3. For an axial-depth error, enter the required incremental change in DZL. Leave DXL unchanged when diameter already measures correctly.
4. Review the active correction values and confirm that the edit was applied to the intended tool and cutting edge. Do not move on until the active data set matches the tool called by the program.
5. Run a clearance or single-block check appropriate to the machine setup, then make another controlled measurement cut.
6. Measure both diameter and axial position. A successful workpiece-coordinate edit changes the selected dimension while the other remains at its previous result within normal process variation.

The same coordinate-system choice can exist in tool management. Its standard state is TCO, so changing the NC-program correction mode does not prove that a tool-management edit will use workpiece coordinates. Check the mode at the location where the value is actually entered.

Tool-coordinate transformation mechanism

In TCO, an offset follows the tool coordinate system. When the head is swiveled, that coordinate system is rotated relative to the workpiece axes. The control therefore transforms a local correction vector into machine or workpiece components:

Δp_workpiece = R(B) × Δp_tool

At B45°, a local longitudinal correction generally has X and Z components. That coupled response is the expected result of coordinate transformation, not a random axis error. The displayed component magnitudes and signs also depend on axis definitions and whether the turning X value is represented as radius or diameter, so a bare 45-degree trigonometric calculation is not enough to authorize an offset entry.

If TCO must remain active, use the control softkey translated as Calculate tool correction. Enter the requested dimensional correction through its form and let the control calculate the required DXL and DZL. Confirm both calculated values before accepting them. Manual calculation is the alternate branch, but it requires the machine's B-axis sign convention, active transformation, tool-axis definition, and X scaling from the machine documentation and control display.

Post-correction verification

1. Return to the same programmed B45° position and confirm the same work offset, tool, edge, and transformation are active.
2. Inspect the correction page. Verify the selected coordinate mode and record the final DXL and DZL values.
3. Perform the next cut under the same finishing conditions. Changing stock allowance, tool path, or cutting load at this stage obscures whether the offset worked.
4. Measure the corrected feature in X and Z. For a diameter-only workpiece-coordinate edit, the diameter must move by the commanded correction direction while axial depth remains unchanged within process variation.
5. If X and Z still move together, recheck whether the edit was made in tool management under its standard TCO mode rather than in the intended workpiece-coordinate correction field.

Recurring failure branches

Do not compensate a repeatability problem by accumulating offsets. Also avoid editing both DXL and DZL merely because both axes moved under TCO; first decide whether the desired correction is workpiece-oriented or tool-oriented.

FAQ