Calibrations & Adjustments
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      1. Keyline USA Knowledge Base
      2. Machine Set-Up & Operation
      3. Calibrations & Adjustments

      How to Safely Adjust and Calibrate the 303 Key Cutting Machine

      Follow these steps to change the tracer and milling cutter, adjust the milling cutter-tracer assembly, and replace the carriage on the 303 key cutting machine safely and correctly.

      Changing the Tools

      Before starting, ensure you have the necessary tools for key duplication (refer to the 303 manual for tool descriptions).

      Changing the Tracer and Milling Cutter

      Important Safety Warning:

      • Turn OFF the power and disconnect the machine before proceeding.
      • Do not hold the tools by their bit when replacing them.

      Steps to Change the Tracer and Milling Cutter:

      1. Loosen the tracer stop nut (5) and the milling cutter stop nut (7).
      2. Remove the old tracer and milling cutter carefully.
      3. Ensure the new tracer and milling cutter are clean before inserting them.
      4. Insert them in their seats and push them against the stop.
      5. Secure them by tightening the stop nuts (5) and (7)—avoid over-tightening.

      Adjusting the Milling Cutter-Tracer Assembly

      Procedure:

      1. Turn on the main switch—the machine is now ready for electromechanical calibration.
      2. Press button (1) to start the calibration system—the yellow LED (2) will turn on.
      3. Check that the tracer springing system is locked—the locking ring (3) should be in the 'locked' position.
      4. Move the milling cutter-tracer assembly close to a non-cut area of the key using lever (4).
      5. As you move lever (4) downwards, observe the following:
        • Green LED (5) turns on
        • Acoustic signal is active
      6. If the LED and signal are active, slowly rotate knob (6) clockwise until both turn off.
      7. Move lever (4) downward again.
      8. Turn knob (6) in the direction indicated by arrows (7) until:
        • Green LED (5) turns on
        • Acoustic signal becomes active
      9. Release the tracer springing system and start duplicating the key using button (8).

      For easier duplication of Laser-type keys, lock the tracer springing system by rotating locking ring (3).


      For models 304 and 305, calibration must be performed while jaws are in the "O" position.

      Replacing the Carriage

      Important Safety Warning:

      • Turn OFF the power and disconnect the machine before proceeding.

      Steps to Replace the Carriage:

      1. Loosen the two stop nuts (A).
      2. Remove the existing STD jaw-holding carriage from its seat.
      3. Insert the new carriage and align it with the sliding guides.
      4. Fasten the carriage by tightening the stop nuts (A).

      For further assistance or a digital copy of the 303 manual, contact techsupport@keyline-usa.com with your serial number. 🚀