Applies to: E4

Exchanging the spindle unit

When exchanging the spindle, exchange the entire spindle unit, which consists of the following components:

  • Spindle including collet chuck

  • Collet chuck release unit including cable

The spindle unit (marked orange) is located behind the service cover.

 

  1. Have ready:

    • 1 x Spare spindle SFE 300E

       

      1. Connection for the spindle cable

      2. Spindle including collet chuck

      3. Cable of the collet chuck release unit with plug

    • 1 x Torque screwdriver 1.5 Nm with TX20 bit

       

  2. Start DentalCNC.

  3. Open the Maintenance section window with the following icon in the main icon bar: 

  4. Select the following icon for the Exchange spindle entry:

    • The spindle moves into the spindle exchange position.

  5. Close DentalCNC.

    6.  

     

     

  6. .Switch off the machine at the main power switch.

     

  7. Disconnect the machine from all lines.

  8. Remove the service cover,

    Disassembling and assembling the machine housing

  9. Loosen the spindle cable by manually turning the knurled nut anti-clockwise.

  10. Pull the spindle cable out of the connector on the spindle unit.

  11. Remove the collet chuck release unit cable:

    Push both mounting clips on the connector toward the center and pull the connector out of the socket.

    12.  

     

  12. Loosen the fixing screw with the torque screwdriver. Do not unscrew the screw completely.

  13. Pull the spindle unit upward out of the spindle holder.

    14.  

     

  14. Pick up the spare spindle unit and locate the positioning pin hole (marked orange) on the bottom.

  15. Turn the spindle unit such that the positioning opening (marked orange) is located at the rear left.

    16.  

     

  16. Insert the spare spindle unit into the spindle holder from above:

    1. Insert the positioning aid (marked blue) on the spindle holder into the positioning hole (marked orange) in the spindle.

    2. Gently push the spindle down, paying attention to the spindle height display.

    NOTICE! Make sure that the spindle gear does not touch the cooling liquid hose.

    • Once you have pushed the spindle down sufficiently, you will see the green ring on the spindle height display.

     

     

     

  17. Use the torque screwdriver to tighten the screw for holding the spindle in place.

  18. Plug the spindle cable into the spindle connector.

  19. Tighten the spindle cable by manually turning the knurled nut clockwise.

  20. Insert the collet chuck release unit cable into the corresponding connector in the machine.

    21.  

     

     

  21. Attach the service cover.

    Disassembling and assembling the machine housing

  22. Switch on the machine at the main power switch.

  23. Start DentalCNC.

  24. Open the Maintenance section window with the following icon in the main icon bar: 

  25. Select the following icon of the entries Exchange spindle and Exchange spindle collet chuck: 

  26. Mill a test specimen and calibrate the machine as necessary.

    Calibrating the machine with calibration specimens

  27. Contact customer service and have the spindle operating hours reset.

    This can be important for deciding warranty claims.