Applies to: Z4

Cleaning or exchanging the spindle collet chuck

You need to clean the collet chuck with the spindle service set which was provided with your machine.

Alongside the current improved version of the spindle service set, there is a previous version.

Depending on which spindle service set you use, follow the corresponding instructions.

Instructions for the current spindle service set

To clean the collet chuck do the following:

1. Have the spindle service set ready.
2. Start the maintenance by selecting the corresponding entry in the Maintenance section on the touchscreen.
• The following happens:
1. The on-screen quick guide displays.
2. The working chamber door opens.
3. Open the collet chuck using the quick guide.
4. Untighten the collet chuck with the knurled nut:
   1. Insert the pin of the knurled nut into the collet chuck.
   2. Make sure that the collet chuck is properly seated in the recess of the knurled nut (marked orange).
      

       

   3. Twist the knurled nut counterclockwise.


 

5. Unscrew the collet chuck by hand and remove it.


 

6. Put the knurled nut and the collet chuck aside within reach.
7. Clean the inner cone of the spindle with the cleaning cone of the service set.


 

8. Clean the collet chuck with the brush of the service set.

   1. Insert the brush into the collet chuck until the end of the brush aligns (marked orange) with the end of the collet chuck.

      NOTICE Do not push any further because otherwise dirt my get into the thread of the collet chuck.

   

    

   2. Rapidly pull the brush out of the collet chuck and twist it at the same time.

      

       

   3. Repeat the last 2 steps multiple times.

NOTICE
Damaging of the spindle when using the wrong grease or applying the grease incorrectly
If you use unsuitable grease or if grease gets into the longitudinal slots of the collet chuck, the machine may get damaged.
• Before applying the grease, ensure that the collet chuck is perfectly clean.
• Ensure that no grease gets into the longitudinal slots of the collet chuck.
• Only use a very small amount of grease, less than the size of a pinhead.
• Only use the provided grease of the service set.

9. Thoroughly clean the complete outer surface of the collet chuck with a clean and dry cloth.

   

    

10. Put a small amount of the collet grease on the index finger and smear it with the thumb.
11. Apply the smeared collet chuck grease to the flanks of the collet chuck (marked blue). Make sure that no collet chuck grease gets into the slots (marked red).


 

12. Insert the collet chuck (marked orange) into the spindle. Screw in the collet chuck by twisting it clockwise by hand.

    

     

13. Insert the pin of the knurled nut into the collet chuck. Make sure that the collet chuck is properly seated in the recess of the knurled nut.

NOTICE Rotational imperfections when the collet chuck is not tightened properly.

14. Tighten the collet chuck with the knurled nut:
    1. Insert the pin of the knurled nut into the collet chuck.
    2. Make sure that the collet chuck is properly seated in the recess of the knurled nut (marked orange).
       

        

    3. Turn the knurled nut clockwise until the collet chuck fits tightly in the spindle.


 

15. Store the spindle service set in a safe place.
16. Clean the nozzle plate.

Instructions for the old spindle service set

To clean the collet chuck do the following:

1. Have the spindle service set ready.
2. Start the maintenance by selecting the corresponding entry in the Maintenance section on the touchscreen.
• The following happens:
1. The on-screen quick guide displays.
2. The working chamber door opens.
3. Open the collet chuck using the quick guide.
4. Put the knurled nut to the spindle with one hand. With the other hand insert the measuring pin into the collet chuck and keep holding it.


 

5. Loosen the collet chuck with the knurled nut. Unscrew the collet chuck by hand or with the knurled nut.
6. Remove the measuring pin from the collet chuck. Then put it aside within reach together with the knurled nut.
7. Clean the inner cone of the spindle with the cleaning cone of the service set.


 

8. Clean the collet chuck with the brush of the service set.

 

1. Longitudinal slot
2. Cleaning brush
NOTICE
Damaging of the spindle when using the wrong grease or applying the grease incorrectly
If you use unsuitable grease or if grease gets into the longitudinal slots of the collet chuck, the machine may get damaged.
• Before applying the grease, ensure that the collet chuck is perfectly clean.
• Ensure that no grease gets into the longitudinal slots of the collet chuck.
• Only use a very small amount of grease, less than the size of a pinhead.
• Only use the provided grease of the service set.
9. Put a small amount of the collet grease on the index finger and smear it with the thumb.
10. Apply the smeared collet chuck grease to the flanks of the collet chuck (marked blue). Make sure that no collet chuck grease gets into the slots (marked red).


 

NOTICE Rotational imperfections when the collet chuck is not tightened properly.

11. Insert the measuring pin into the collet chuck with one hand and keep holding it. Screw the collet chuck with the knurled nut in your other hand tightly into the spindle.
12. Remove the measuring pin from the collet chuck and store it together with the other components of the spindle service set.
13. Clean the nozzle plate.