Applies to: N4+

Operation: Executing jobs

How do I start machining? How can I start milling? How can I start grinding?

You control and start manufacturing with DentalCNC. In this chapter, we will give you a brief overview. For the complete instructions, see the documentation for DentalCNC.

NOTICE

Damage to the machine when using damaged tools and blanks

If tools or blanks are damaged, parts can break off and damage the machine during job execution.

  • Check the blanks and tools thoroughly for damage before every job execution.

When you have prepared your jobs and your machine, you can start machining. Machining is a fully automated process and only requires your attention in case of unexpected events.

Do not move the machine during job execution, otherwise the results may become imprecise.

Starting jobs

  1. Ensure the following:
    • You created a job on your CAM computerClosed The computer that is connected to your machine and which runs DentalCAM and DentalCNC.. It has been transferred to DentalCNC.
    • The tool magazine is inserted in the working chamber.
    • All required tools are in the right positions in the tool magazine and are neither worn nor damaged. They have also been added to the virtual tool magazine in DentalCNC.
    • The required blanks are mounted.
    • There is enough cooling liquid in the cooling liquid tank.
    • The compressed air supply is set correctly.
  2. Close the working chamber door.

  3. Proceed as follows:

    Start machining via the depicted icon in DentalCNC.

  4. Start machining via the depicted icon in DentalCNC.

Aborting machining

  1. DentalCNC: Select the depicted icon.

  2. Confirm the current message.
    • The following happens:
    1. Machining stops immediately.

    2. DentalCNC asks whether the tool in the spindle can be safely inserted into the tool magazine.

      If inserting the tool would damage the tool magazine inserts, the tool must be removed manually.

  3. If you want the machine to automatically put the tool into the tool magazine, confirm the dialog.

    If you want to remove the tool manually from the collet chuck, answer the question in the negative.

  4. If the spindle has moved into the tool change position, continue with the next step.

  5. CAUTION!Wear gloves.

  6. Open the working chamber door.

  7. Hold the tool in the collet chuck in place.

    8.  

  8. Confirm the current message.
    • The collet chuck opens.
  9. Remove the tool from the collet chuck.

     

  10. If your machine is equipped with a manual working chamber door, close the door.
  11. Confirm the current message.
    • The following happens:
    1. The collet chuck closes.
    2. The spindle moves to its default position.

A job will be interrupted in the following cases:

  • The compressed air supply is not sufficient
  • The cooling liquid flow is not sufficient

An interrupted job will normally be continued automatically after the error is corrected.

A job will be aborted in the following cases:

  • In case of a machine malfunction
  • In case of a tool breakage
  • In case of a power failure

If a job was aborted, you have to restart it.

DentalCNC allows you to resume the job from the last machining step. For more information, see the corresponding documentation.

If the job was interrupted, DentalCNC displays a corresponding message.

If the compressed air is insufficient

  • Check the following:
  • The manometer of the compressed air regulator
  • The installation of the pneumatic hoses
  • Your compressor

If the vacuum is insufficient

  • Check the suction hose and your suction unit.

If the cooling liquid flow rate is insufficient

  1. Check if there is enough cooling liquid in the tank
  2. Check if the cooling liquid and the tank including the filter are clean.

A machine malfunction was recognized by the internal control unit in case of a critical event. The working chamber will be illuminated in red. DentalCNC displays the error message and error code that was sent by the control unit.

  1. Record the error message and error code that is displayed.
  2. Restart the machine and the CAM computerClosed The computer that is connected to your machine and which runs DentalCAM and DentalCNC.. If the problem persists, continue with the next step.
  3. Disconnect the machine from the electrical source and prevent it from being restarted.
  4. Contact customer service. Have the error message and error code readily available.
  5. To remove a blank from the working chamber, open the working chamber door manually if necessary.

If a tool breaks during machining, the machine will not recognize this immediately. Instead, the spindle will continue to move with the broken tool. The tool breakage will be recognized upon the following events:

  • The next regular tool change

A tool breakage can be caused by the following:

  • The tool was damaged or worn
  • The tool was put into the wrong tool position or was manually inserted into the spindle at the wrong time. As a consequence, it was not suitable for the processing step.
  • The distribution of the objects in the blank (“nesting”) was not correct.

If a tool breaks, do the following:

  1. Open the working chamber door.
  2. Remove all parts of the broken tool from the working chamber and the collet chuck.
  3. Re-add the tool to the virtual ATB and virtual tool magazine in DentalCNC.
  4. If the spindle picked up the tool from the tool magazine, check if the tool was inserted into the correct position. Insert a spare tool into the correct position in the tool magazine.
  5. If you manually inserted the tool into the collet chuck, check if the broken tool corresponds to the tool type which you were prompted to insert. Have a correct spare tool ready.
  6. Close the working chamber door.
  7. Resume the job.

DentalCNC allows you to resume the job from the last tool change. For more information, see the corresponding documentation.

If tools break regularly, you can find additional information in the troubleshooting section: Troubleshooting

While the machine is not receiving power, you have no access to the working chamber.

WARNING

Crushing hazard and cutting injuries if the working chamber door is open

If the working chamber door is open during machining, it will not protect users from bruises and cuts.

  • Do not open or close the working chamber door during machining.
  • Never operate the machine with the working chamber door open.
  • Perform the emergency opening only if you are authorized to do so and if you have received training on it.
CAUTION

Cutting injuries caused by rotating tools

If a power failure or a machine malfunction occurs during machining, the spindle including the inserted tool keeps rotating. If you touch the rotating tool, you will suffer from cutting injuries.

  • Wait until the spindle has stopped rotating before performing an emergency opening.
  • Do not carry out the emergency opening during regular operation.

On the left side of the machine there is an opening for the emergency release.

The lever for the emergency release is located on the right underside of the machine.

In case a tool magazine gets stuck on the holder, use the screw on the backside of the tool magazine to loosen it.

  1. Pick up a flat blunt tool (e.g. a slot screwdriver).
  2. Use the tool to remove the protective cap on the screw and put it aside within reach.
  3. Using the provided Allen key, turn the screw clockwise.
    • The tool magazine moves backwards and is released.

     

  4. Remove the tool magazine from the working chamber.
  5. Reset the screw to its original state:
    1. Using the provided Allen key, turn the screw counterclockwise into its original position.
    2. Cover the opening with the protective cap.
      • The screw is reset and the tool magazine is ready to be mounted again.