FAQ

Symptoms:

1. Dongle not detected. Suggested actions: securely reinsert the dongle and reinstall the dongle driver.
2. Missing license file.
3. License file fails to open or is corrupted.
4. Dongle information does not meet standards; a new license and update program are required.
5. License file and dongle serial number do not match.
6. License file has expired and needs renewal.

Cause Analysis:

These are common licensing issues typically identified by specific error codes. Appropriate license updates should be performed according to the error prompts.

Recommended Solutions:

1. Follow your company’s standard procedures for license file updates based on the error codes provided.
2. License files differ between AC-DMIS versions 4.0 and 5.0. When upgrading from V4 to V5, a new dongle must be installed and refreshed with the update program.
3. For “Super Dongle” licenses, submit an authorization request file to the company. Once the new license file is generated, update the license accordingly.
4. When installing AC-DMIS software on Windows 7 64-bit systems, ensure the 64-bit AC-X64 version of the software is installed. Otherwise, you may receive a “dongle not detected, please reinstall dongle driver” error.

Symptoms:

Repeated measurements of the same workpiece yield inconsistent results with large deviations.

Cause Analysis:

1. Unreliable or unstable workpiece clamping.
2. Loose or unreliable connections of measurement accessories.
3. Inconsistent measurement methods.
4. Poor surface quality or low machining accuracy of the workpiece.
5. Measurement machine accuracy varies over different time periods.
6. Loss or degradation of the measurement machine’s repeatability.

Recommended Solutions:

1. When measuring workpieces, especially small or lightweight ones, ensure they are securely clamped using appropriate fixtures to prevent any relative movement. This significantly improves measurement repeatability.
2. Before measurement, verify that all accessories and connections are secure and stable.
3. Use consistent measurement methods during repeated measurements. For high-precision requirements, optimize measurement programs to ensure repeatability stays within acceptable limits. For example, consistently select reference points and measurement features.
4. Rough surfaces or poor machining accuracy can cause errors in detecting reference elements, leading to deviations in measured features and poor repeatability. Automated measurement machines should ideally run measurement programs automatically to keep deviations within reasonable bounds.
5. Environmental factors can affect machine accuracy and operating conditions, causing variations in measurement results at different times. Some deviation is normal under these conditions.
6. Various factors affecting the measurement system can degrade repeatability, resulting in poor consistency in workpiece measurements.
   

Symptoms:

Significant differences in measurement results when the same workpiece is measured on two machines or machines from different brands.

Cause Analysis:

1. Inconsistent measurement plans or procedures.
2. Different accuracy specifications between measurement machines.
3. Variations in the accuracy status or calibration of the machines.
4. Temperature effects on the workpiece due to differing measurement environments.

Recommended Solutions:

1. When comparing measurement data, ensure uniformity in establishing measurement references, coordinate systems, selection and number of measurement points, and probe types. This is especially critical for workpieces with tight tolerances. Inconsistent measurement plans can cause discrepancies between machines.
2. For workpieces requiring high measurement accuracy, select machines that meet the required precision and are comparable in performance.
3. Ensure all machines used for data comparison are within their certified accuracy range and operate under consistent environmental conditions.
4. Allow sufficient time for the workpiece, especially large ones, to reach thermal equilibrium before measurement.

Symptoms:

Measurement results significantly exceed the workpiece tolerance range.

Cause Analysis:

1. Unreliable or unstable workpiece clamping.
2. Excessive surface roughness or contamination on the workpiece surface.
3. Loose connections of measurement accessories or contamination on the probe or stylus tip.
4. Improper probe calibration.
5. Errors in the measurement method.
6. Environmental factors in the measurement room causing errors.
7. Measurement machine accuracy errors.

Recommended Solutions:

1. When measuring workpieces, especially small or lightweight ones, ensure they are securely clamped with fixtures to prevent any relative movement. This helps improve measurement accuracy.
2. Before measurement, allow the workpiece to reach thermal equilibrium based on its size and mass. Thoroughly clean the workpiece surface. For rough surfaces, use probes with larger stylus balls if possible.
3. Verify all accessory connections are secure and ensure the probe tip is clean before measurement.
4. When replacing the probe, perform proper assembly and calibration to ensure reliable measurement results.
5. Use a reasonable and correct inspection plan to improve measurement accuracy and efficiency. Confirm the measurement plan’s validity before starting.
6. Ensure the measurement environment meets required conditions for temperature, humidity, air supply, power, and vibration within allowable ranges.
7. Use measurement machines that are within their calibration period for workpiece inspection.
   

Symptoms:

1. During probe calibration, the software shows an “Abnormal Collision” error and stops the calibration process.
2. During probe calibration, the software reports “Calibration Result Out of Tolerance.”

Cause Analysis:

1. Manual probing point on the standard sphere deviates too far from the sphere center, or the probing distance is set improperly.
2. Loose probe attachments or unstable installation of the standard sphere can cause “Abnormal Collision” or “Calibration Result Out of Tolerance.”
3. Using an extension rod for probe calibration can cause “Abnormal Collision” if the probe holder is misaligned.
4. Dirt or contamination on the probe or standard sphere surface can cause “Calibration Result Out of Tolerance.”
5. Incorrect probe file selected for calibration.
6. Excessive perpendicularity deviation among the machine’s three axes can cause “Calibration Result Out of Tolerance.”
7. Faulty probe sensor may cause “Calibration Result Out of Tolerance.”
8. If all above possibilities are excluded, check whether the shape error and probe radius tolerance settings are reasonable for the probe calibration.

Recommended Solutions:

1. When manually probing the standard sphere, try to keep the probing point close to the sphere center; set the probing distance to a reasonable range of about 3–5 mm during calibration.
2. Check and tighten all probe attachments and ensure the standard sphere is securely installed.
3. It is recommended to use the longest probe combination configured by the customer for probe holder installation calibration.
4. Clean dirt and contamination from the probe and standard sphere surfaces.
5. Select the correct probe file corresponding to the installed probe before calibration to avoid errors caused by misoperation.
6. Use a standard gauge block to check the machine’s three-axis perpendicularity; if the deviation exceeds allowable limits, perform hardware adjustments.
7. Test by replacing the probe body, module, or probe holder.
8. For TP20 probes with long extension rods or when using heavy probing forces, the calibration result may deviate more from theoretical values. Adjust the shape error and probe radius tolerance settings accordingly.