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On the shop floor, electric screwdrivers are indispensable tools. Over time, however, a common headache emerges: the torque value shown on the screwdriver no longer matches the true torque measured by a tester. This mismatch can degrade product quality and slow production. The key to solving it is proper calibration.

1. Problem Impact

• Over-torque: risks damaging fasteners or components.

• Under-torque: risks loosening in service and safety failures.

2. Calibration Is Critical

Danikor smart screwdrivers allow users to set a calibration interval (e.g., after every 5,000 cycles). When the preset count is reached, the tool reminds you to recalibrate, keeping production stable and quality consistent.

3. Step-by-Step Calibration

Preparation

• Tool: Dynamic torque tester.

• Target: Customer’s specified torque value.

• Mode: Match the screwdriver’s torque control mode (torque-only, torque + angle, etc.).

Data Collection & Calculation

• Record 25 pairs of readings:
  – Screwdriver display value.
  – Tester actual value.

• Compute the torque drift (average deviation).

• Derive a new K-factor (correction coefficient).

Validation

• Run another 25 cycles with the new K-factor.

• Confirm that display and actual values align within tolerance.

• Only proceed to production after validation passes.

4. Post-Calibration Benefits

• Accuracy: display and actual torque match.

• Yield: fewer rejects from over- or under-tightening.

• Efficiency: reduced manual checks and rework.

5. Ongoing Maintenance

• Daily: wipe dust, inspect cables and connectors.

• Weekly: quick torque spot-check on a tester.

• As-needed: recalibrate if any drift, vibration, or impact is noticed.