How To Proceed In Case Of A Machine Malfunction; How To Proceed In Case Of A Tool Breakage; Procedure In Case Of A Power Failure; Emergency Release Of The Working Chamber Door - VHF K4 edition Originalbetriebsanleitung

M1. If DentalCNC prompts that the compressed air is insuf-
ficient, check the following:
The manometer of the service unit
„
The installation of the pneumatic hoses
„
Your compressor
„
M2. If DentalCNC prompts that the vacuum in the working
chamber is insufficient, check the suction hose and
your suction device.
You can find additional information in the chapter on
b
troubleshooting (


5.7.2 How to proceed in case of a machine malfunction

A machine malfunction is recognized by the internal control
unit in case of a critical event. DentalCNC displays the error
message and error code that was sent by the control unit.
M1. Disconnect the machine from the electrical source and
prevent it from being restarted.
M2. Record the error message and error code that is dis-
played in DentalCNC.
M3. Contact customer service. Have the error message and
error code from DentalCNC readily available.
M4. To remove a blank from the working chamber, unlock
the working chamber door with the key for emergency
release ( chapter 5.8, page 21).


5.7.3 How to proceed in case of a tool breakage

If a tool breaks during machining, the machine will not rec-
ognize this immediately and the spindle will continue until
the next tool change. Only upon measuring the broken tool
will the job execution be cancelled and DentalCNC will dis-
play a corresponding message.
A tool breakage can be caused by the following:
The tool was damaged or worn.
„
The tool was put into the wrong tool magazine position
„
or was inserted into the spindle manually 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 sufficiently adapted to the material.
M1. Open the working chamber door.
M2. Remove all parts of the broken tool from the working
chamber.
M3. If the spindle picked up the tool from the tool mag-
azine, check if the tool was inserted into the correct
position. Insert a spare tool into the correct position in
the tool magazine (

M4. If you inserted the tool into the collet chuck manually,
check if the broken tool corresponds to the initial tool
type in which DentalCNC prompted. Have a correct
spare tool ready.
chapter 8, page 30).
chapter 5.3, page 18).
Original Operating Instructions: K4 edition
Document version: E – 02/2020
M5. Close the working chamber door and execute the job
again.
Þ
If tools break regularly, you can find additional infor-
mation in the chapter on troubleshooting (
ter 8, page 30).

5.7.4 Procedure in case of a power failure

As long as the machine is not powered, the working chamber
door will remain locked.
h After a short power failure turn on the machine again
and follow the on-screen prompts so that the machine
can reference.
h In case of a longer power failure use the provided key
for the emergency release of the working chamber door.
5.8 Emergency release of the working chamber
door
h Only use the emergency release of the working chamber
door to remove a blank from the working chamber if the
working chamber door is permanently locked.
WARNING
Crushing hazard and cutting injuries while
running the machine with the working chamber
door open
If the safety lock is not reactivated after the emergency re-
lease, the user will be able to operate the machine with the
working chamber door open. In this case the working cham-
ber door will not protect the user from bruises caused by
machine movements and from cutting injuries caused by the
rotating tool.
h Activate the safety interlock immediately after complet-
ing your work in the working chamber.
h Never operate the machine with the working chamber
door open.
h Perform the emergency release only if you are authorized
to do so and if you have received training on its usage.
h Store the key for the emergency release in a place where
only authorized persons can access it.
h Report every emergency release to customer service.
CAUTION
Cutting injuries when touching a rotating tool
If a power failure or a machine malfunction occurs during
processing, the spindle including the inserted tool keeps
rotating. If you touch the rotating tool, you will suffer from
cutting injuries.
h Wait until the spindle has stopped rotating before carry-
ing out an emergency release.
Running the machine
chap-

21