Applies to: S1 & S2

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.

BEWARE

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 dentalcam computer. It has been transferred to dentalcnc.
    • 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.
    • S2: The required blanks are mounted in the blank magazineClosed Part of the blank changer in which you store the blanks for automatic loading. and are assigned in dentalcnc.
    • For wet machining: The wet grinding module is properly installed.
    • The compressed air supply is set correctly.
  2. Close the working chamber door.

  3. If you manually control the suction unit, switch it on and set it to the required level.

     

    For dry manufacturing: If you manually control the suction unit (optional), switch it on and set it to the required level. 
  4. Start dentalcnc.

    • The suction unit is running.

      Machining starts.

Aborting machining

  1. Confirm the current message.
    • The following happens:

    1. 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.

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

  3. CAUTION!Wear gloves.

  4. Open the working chamber door.

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

  6. Confirm the current message.
    • The collet chuck opens.
  7. Remove the tool from the collet chuck.
  8. If your machine is equipped with a manual working chamber door, close the door.
  9. 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 vacuum in the working chamber is not sufficient
  • For wet machining: 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 that the wet grinding module is correctly installed and operational.
  2. Check if there is enough cooling liquid in the tank.
  3. Check if the cooling liquid, the tank and the filter are clean.

A machine malfunction is detected by the internal control unit when a critical event occurs. The working chamber will be illuminated in red. dentalcnc displays the error code and error message 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 detected when the following events occur:

  • 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 backup 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.

S2: If the blank changerClosed Machine component which stores multiple blanks in a magazine and which can automatically load them into the working chamber.. When using the search, use a blank changer or a blank magazine instead is moving when a power failure occurs, it may not move back to the default position. This will produce an emergency stop signal when the machine is started and the machine will not reference.

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.
  • Activate the safety interlock immediately after completing your work in the working chamber.
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.

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

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.

In some cases (e.g. when a power failure occurs) the blank changerClosed Machine component which stores multiple blanks in a magazine and which can automatically load them into the working chamber.. When using the search, use a blank changer or a blank magazine instead may not be able to move back into default position. This will produce an emergency stop signal when the machine is started and the machine will not reference.

In this case a manual reset of the blank changerClosed Machine component which stores multiple blanks in a magazine and which can automatically load them into the working chamber.. When using the search, use a blank changer or a blank magazine instead to default position is required.

  1. Open the working chamber door. If necessary, perform an emergency opening of the working chamber door. Emergency opening of the working chamber door
  2. Switch off the machine at the main power switch. Disconnect the machine from the eletrical source.
  3. Disconnect the machine from the external compressed air supply.
  4. Open the blank magazineClosed Part of the blank changer in which you store the blanks for automatic loading. door.
  5. With one hand open the blank changerClosed Machine component which stores multiple blanks in a magazine and which can automatically load them into the working chamber.. When using the search, use a blank changer or a blank magazine instead flap (marked orange) in the working chamber.
  6. With the other hand push the loading unit of the blank changerClosed Machine component which stores multiple blanks in a magazine and which can automatically load them into the working chamber.. When using the search, use a blank changer or a blank magazine instead (marked blue) towards the blank magazineClosed Part of the blank changer in which you store the blanks for automatic loading. until you can reach the blank gripper (marked green).

    7.  

  7. If there is a blank frame in the blank gripper, open the gripper and remove it.
  8. Close the blank gripper.
  9. Push the loading unit of the blank changerClosed Machine component which stores multiple blanks in a magazine and which can automatically load them into the working chamber.. When using the search, use a blank changer or a blank magazine instead completely towards the blank magazineClosed Part of the blank changer in which you store the blanks for automatic loading..
  10. Push the blank gripper into the end position at the left side of the machine.
  11. Open the gripper.
  12. Close the working chamber door.
  13. If you performed an emergency opening, reactivate the safety interlock of the working chamber door. Emergency opening of the working chamber door
  14. Close the blank magazineClosed Part of the blank changer in which you store the blanks for automatic loading. door.
  15. Connect the machine to the external compressed air supply.
  16. Connect the machine to the electrical source
  17. Switch on the machine at the main power switch.
  18. Start the CAM computerClosed The computer that is connected to your machine and which runs dentalcam and dentalcnc..
    • The machine references.