Applies to: R5

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.

Useful links:

 Controlling the machine to prepare machining

 Operating the blank changer with DentalCNC

 Machining jobs – overview

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

Ensure the following:

You created a job on your CAM computer 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.
If using the blank changer 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, the required blanks are mounted in the blank magazine Part of the blank changer in which you store the blanks for automatic loading. and are assigned in DentalCNC.
For wet machining: There is enough cooling liquid in the cooling liquid tank.
The compressed air supply is set correctly.

Close the working chamber door.
For dry machining: If you manually control the suction unit, switch it on and set it to the required level.
Start machining via the depicted icon in DentalCNC.

For dry machining: The suction unit is running.

Machining starts.

Aborting machining

Select one of the following icons:

Abort machining immediately

Abort machining after the current job (only when using the blank changer 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)
Confirm the current message.

The following happens:

Machining stops according to your selection.
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.

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.
If the spindle has moved into the tool change position, continue with the next step.
CAUTION!Wear gloves.
Open the working chamber door.
Hold the tool in the collet chuck in place.

Confirm the current message.

The collet chuck opens.

Remove the tool from the collet chuck.
Close the working chamber door.
Confirm the current message.

The following happens:

The collet chuck closes.
If your machine is equipped with an automatic working chamber door, the door automatically closes.
The spindle moves to its default position.

DirectClean Technology

Depending on the DentalCNC version, the DirectClean Technology works differently.

DentalCNC 7

The DirectClean Technology of the R5 allows you to machine multiple jobs in succession using the blank changer 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, even alternating between wet and dry jobs. The machine will automatically rinse and / or dry the working chamber.

The rinsing and drying process is triggered by the sequence and type of jobs.

Job	followed by	Program	D
dry job	no job	Blowing off the blank1	1
wet job	no job	None	–
dry job	wet or dry job	Blowing off the blank	1
dry job	no job	Rinsing & drying2	17
wet job	dry job or no job	Drying	15

1 If activated in the DentalCNC settings

2 Can be deactivated in the DentalCNC settings

D	Duration in minutes
	Blank inserted into the working chamber
	Blank(s) loaded from the blank magazine Part of the blank changer in which you store the blanks for automatic loading.

To minimize the cleaning time, we recommend executing all dry jobs before all wet jobs.

DentalCNC 8

The DirectClean Technology of the R5 improves the cleanliness of the machine, especially when alternating between wet and dry jobs. It consists of the following processes:

Blowing off the blank with compressed air
Drying the working chamber with heated compressed air
Discharging machining debris during machining with the ionizer for suitable blank types

The blowing and drying process is triggered by the sequence and type of jobs. You can find the corresponding details in the table below.

Job	followed by	Program	D
dry job	no job	Blowing off the blank1	2
wet job	no job	Drying	15*
dry job	any job	Blowing off the blank	2
wet job	no job	Drying	15*
wet job	dry job	Drying	15
wet job	wet job	Drying	15*

1 Can be deactivated in the DentalCNC settings

* Can be reduced to 2 minutes in the DentalCNC settings

D	Duration in minutes
	Blank inserted into the working chamber
	Blank(s) loaded from the blank magazine Part of the blank changer in which you store the blanks for automatic loading.

To minimize the cleaning time, we recommend executing all dry jobs before all wet jobs.

Manually starting the drying program

You can also start the drying program manually.

Open the DentalCNC Application settings with the following icon in the main icon bar:
Open the Machine maintenance view with the following icon in the local icon bar:
Select the following icon:

Ionizer

The built-in ionizer is also part of the DirectClean Technology. It is automatically activated for suitable jobs to make cleaning the working chamber easier.

Job interruptions and job abortions

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.

How to proceed in the event of a tool breakage

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:

Open the working chamber door.
Remove all parts of the broken tool from the working chamber and the collet chuck.
Re-add the tool to the virtual ATB and virtual tool magazine in DentalCNC.
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.
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.
Close the working chamber door.
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

How to proceed in the event of a power failure

NOTICE

Damaging of the multi-purpose compartment flap when you open it manually

If compressed air is being conducted through the machine while you open the multi-purpose compartment flap, the flap mechanics may get damaged.

Before you manually open the multi-purpose compartment flap, close the external compressed air supply.

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

After a short power failure, restart the machine and the CAM computer The computer that is connected to your machine and which runs DentalCAM and DentalCNC..
If you need to access the working chamber in case of a longer power failure, perform an emergency opening of the working chamber door.
If you need to access the multi-purpose compartment, do the following:

Close the main external compressed air supply valve.
Carefully pull the flap down with your hands.

Manually pulling down the flap of the multi-purpose compartment

Emergency opening of the working chamber door

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.

NOTICE

Improper opening or closing of the working chamber door

To avoid damage, heed the following instructions when you manually open or close the working chamber door.

Disconnect the machine from the eletrical source.
Prevent the working chamber door from twisting by pushing or pulling it with both hands.
Only apply as much force as needed to overcome the resistance.

You perform an emergency opening as follows:

Switch off the machine at the main power switch. Disconnect the machine from the eletrical source.

You can manually open the working chamber door.

The working chamber door should move sluggishly, but evenly. If the movement is jerky or the working chamber door gets stuck, do not use excessive force.

Open the working chamber door by pushing it straight and evenly upwards with both hands.
If the door can only be moved by making a major effort, make sure that the guide rails at the back of it are clean.

If the working chamber is wet, leave the working chamber door open so that the working chamber can dry.
Close the working chamber door by carefully pushing it downwards with both hands.

Loosening a fixed tool magazine

In case a tool magazine got stuck on the holder, use the provided grub screw and allen key in the accessory case to release the tool magazine:

Have ready:
- The provided grub screw
- The provided allen key
- A flat blunt tool (e.g. a slot screwdriver)
Open the working chamber door.
Remove machining residues from the tool magazine.
Use the flat blunt tool to remove the protective cap and put the cap aside within reach.

Removing the protective cap

Orient the grub screw so that the screw head points towards you and place it in the opening.
With the allen key, screw in the grub screw.

Screwing in the threaded pin

The tool magazine is released.

Remove the tool magazine from the tool magazine holder.
With the allen key, unscrew the grub screw and remove it from the tool magazine.

Unscrewing and removing the threaded pin

Cover the opening with the protective cap. If the cap is damaged, use a provided spare cap (7.5 mm).
Covering the hole with the protective cap
Thoroughly clean the tool magazine and the tool magazine holder.
Plug the tool magazine back onto the tool magazine holder.
Store the grub screw and allen key in the accessory case.

Operation: Executing jobs

Starting jobs

Aborting machining

Manually starting the drying program

Ionizer

If the compressed air is insufficient

If the vacuum is insufficient

If the cooling liquid flow rate is insufficient