VHF K4 edition User manual

Original Operating
Instructions
K4 edition
Originalbetriebsanleitung
Instrucciones de uso originales
Mode d’emploi d’origine
Istruzioni d’uso originali
dentalportal.info

3
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Contents
1 About this document 4
1.1 Used symbols......................................................... 4
1.2 Structure of safety notes.......................................... 4
2 General safety instructions & operating
regulations 4
2.1 General safety instructions....................................... 4
2.2 Operating regulations............................................. 6
2.2.1 Intended use ..................................................... 6
2.2.2 Controlling the machine through software........... 6
2.2.3 Maintenance and cleaning.................................. 6
2.2.4 Spindle ............................................................. 6
2.2.5 Unattended operation ........................................ 6
2.2.6 Transportation and storage................................. 7
3 Machine description 8
3.1 Connection panel ................................................... 8
3.2 Working chamber door ........................................... 8
3.3 Working chamber................................................... 9
3.4 Air extraction concept............................................. 9
3.5 Manufacturing software and CAM computer ............. 9
3.6 Sound emission...................................................... 9
4 Installing the machine 11
4.1 Checking the scope of delivery............................... 11
4.2 Choosing the installation site................................. 11
4.3 Machine installation (scheme)............................... 12
4.4 Installing the pneumatics...................................... 13
4.4.1 Overview service unit....................................... 13
4.4.2 Mounting the service unit on the Machine ......... 13
4.4.3 Installing the pneumatic hoses to the service unit14
4.4.4 Adjusting the air pressure with the service unit .. 14
4.5 Installing the air extraction system......................... 15
4.5.1 Requirements for the suction device .................. 15
4.5.2 Installing the suction device.............................. 15
4.5.3 Connecting the suction hose with the provided
hose connection .............................................. 15
4.5.4 Installing the switching unit ............................. 16
4.6 Establishing the electric connection ....................... 16
4.7 Connecting the CAM computer.............................. 16
4.8 Testing the machine ............................................. 17
5 Running the machine 18
5.1 Starting up the machine ....................................... 18
5.2 Job execution overview......................................... 18
5.3 Inserting/changing tools...................................... 18
5.4 Mounting and removing blanks............................. 20
5.4.1 Mounting discs................................................ 20
5.4.2 Removing discs................................................ 20
5.5 Executing jobs...................................................... 20
5.6 Interrupting the job execution............................... 20
5.7 Operation interruption or abortion of job execution 20
5.7.1 How to proceed in case of an operation
interruption .................................................... 20
5.7.2 How to proceed in case of a machine malfunction21
5.7.3 How to proceed in case of a tool breakage.......... 21
5.7.4 Procedure in case of a power failure................... 21
5.8 Emergency release of the working chamber door .... 21
6 Machine maintenance and cleaning 23
6.1 Denitionofwearparts......................................... 23
6.2 Maintenance table................................................ 23
6.3 Inspection............................................................ 24
6.4 Cleaning the working chamber and measuring key.. 24
6.5 Cleaning the collet chuck ...................................... 24
6.6 Checking the hoses, cables and connections ........... 26
6.7 Cleaning the housing............................................ 26
6.8 Checking the service unit ...................................... 26
6.8.1 Checking the water separator for condensate...... 26
6.8.2 Exchanging/cleaningthecontaminatedlter
cartridge......................................................... 27
6.9 Exchanging the main fuse ..................................... 27
6.10 Calibrating the axes.............................................. 27
6.11 Replacing the tool magazine inserts....................... 28
7 Disposal 29
8 Troubleshooting 30
Index 33
EC Declaration of conformity 35

4Original Operating Instructions: K4 edition
Document version: E – 02/2020
About this document
1 About this document
1.1 Used symbols
Instructions
hGeneral instruction
M Specicmanual action
S Specicactioninthemanufacturingsoftware
Result
Additional symbols
Cross reference
List
Þ Informationtomakeworkmoreecient.
n Important instructions without any danger for people
or objects.
bAdditional information
1.2 Structure of safety notes
SIGNAL WORD
Type and source of hazard
Further explanations and consequences when ignoring haz-
ards.
hInstructions to avoid hazards.
The following signal words may occur in this document:
DANGER
DANGER indicates a hazardous situation which will result in
death or serious injury.
WARNING
WARNING indicates a hazardous situation which can result in
death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which can result in
minor or moderate injury.
NOTICE
NOTICE indicates a situation which can lead to physical dam-
age of the product or in the surrounding area(s).
2 General safety instructions &
operating regulations
2.1 General safety instructions
DANGER
Incorrect operation of the machine
hBefore installing, maintaining and operating
the machine, read all documents provided with
the machine.
hIf it is unclear how to operate the machine in
any way, do not use the machine and contact
customer service.
hEnsure that every user has access to the operating in-
structions.
hInstruct every user on safe and proper machine handling.
Danger to life due to an electric shock
If you come into contact with electrically charged
parts,youcansuerfromanelectricshock.Water
increasestherisksignicantly.
hDo not remove the housing of the machine.
hOnly have qualied electricians work on any electric
equipment.
hEnsure that an operational Residual Current De-
vice/Ground Fault Circuit Interrupter is installed on the
electric circuit of the machine.
hRun power cables so that they cannot be damaged by
sharp edges.
hBefore switching on the machine, check power cables
for damage.
hBeforeunpluggingthepowercable,switchothema-
chine at the main power switch.
hIn the following cases disconnect the machine
from the electrical source immediately and pre-
vent it from being restarted:
When machine connections or electric cables are
damaged
Before you check or run electric cables
hReplace damaged cables with original manufacturer’s
spare parts.
hNever perform any troubleshooting while the machine
is operating.
hOnly have authorized service technicians repair the ma-
chine.
hDo not touch the machine and especially the cables with
wet or damp hands.


5
Original Operating Instructions: K4 edition
Document version: E – 02/2020
General safety instructions & operating regulations
hCheck the environment of the machine and all accessible
internal areas daily for leaked liquid and remove any liq-
uids near or in the machine immediately.
hNever put any machines or devices which are powered
by electricity under the machine.
hDo not put any objects onto the machine.
WARNING
Respiratory diseases when processing harmful
materials
If you inhale harmful materials during their processing, your
respiratory tracts may be damaged.
hAlways use a suitable air extraction system during dry
machining.
hUseasuctiondevicewithanextra-neparticlelter.
hAvoid materials which damage your health.
Crushing hazard and risk of cutting injuries
through moving machine parts
Through the moving axes and the rotating spindle you can
suerbruisesandcuts.
hOnly operate the machine when the working chamber
door is closed and the safety interlock is activated.
hStore the key for the emergency release in a place where
only authorized persons have access.
hDo not circumvent or deactivate safety devices of the
machine.
hCheck the machine regularly for damage, especially the
safety devices.
hHave damaged safety devices repaired by an authorized
service center unless stated otherwise in this document.
hOnly use original manufacturer’s equipment and original
spare parts for the machine.
hKeep children and animals away from the machine.
hDo not remove the housing of the machine.
Service Mode: risk of cutting injuries and bruises
as well as hazards through ejected debris
If you operate the machine in any “Service Mode” with the
working chamber door open, the risk of injury is increased
signicantly!
hOperate the machine in “User“ mode only unless you
have been authorized by vhf to use other modes.
hEven if you are an authorized user, use the “Service
Modes” only when necessary.
hWhile in any “Service Mode”: Do not reach into
the working chamber while the axes are moving
or during machining.
hWhile in any “Service Mode”: All persons within
the reach of the machine must wear protective
eye wear.
Hearing damage due to loud noise
If you are regularly exposed to loud machining noise, you
maysuerfromhearinglossandtinnitus,
hIf loud noise cannot be avoided, wear ear pro-
tection during machining.
Risk of injuries through loose pneumatic
components under air pressure when
connections are open
Loose pneumatic components can move extremely fast and
unpredictably and may cause injury.
hBefore you run the pneumatic hoses, close the com-
pressed air supply valve.
hBefore you check the pneumatic hoses and pneumatic
connections, set the air pressure to a minimum value.
hIn case of defective machine connections and
pneumatic hoses, disconnect the machine from
the external compressed air supply and the elec-
trical source.
hContact customer service if connections are damaged or
defective.
CAUTION
Trip, fall and slipping hazards
hKeep the working environment and installation
site clean.
hRun cables in such a way that persons cannot
trip over them.
Risk of cutting injuries and burns
If you touch tools or sharp edges on blanks or the machine,
youmaysuerfromcuts.Ifyoutouchthehotspindlebodyor
hottools,youmaysuerfromburns.
hWear gloves when you perform manual work at the ma-
chine or with blanks/tools.

6Original Operating Instructions: K4 edition
Document version: E – 02/2020
General safety instructions & operating regulations
Reduced ability to act with insufficient lighting
In case of an insucient lighting your judgement and/or
your precision may be reduced.
hMake sure that the lighting in your working environment
issucient.
Risk of injury in case of malfunctions caused by
insufficient maintenance
If you do not maintain the machine as required, malfunctions
may occur which can lead to injuries.
hTake note of the intervals and conditions mentioned in
the maintenance table in the operating instructions.
Carry out the respective maintenance tasks accordingly.
Health risk through constant malpositioning
if your working environment is not sufficiently
ergonomic
Over the long run, an improper or one-sided positioning can
be a risk to your health.
hSet up an ergonomic working environment.
hEnsure that the seat height and monitor position is ideal
andthelightingissucient.
2.2 Operating regulations
If you violate the following regulations, you may lose your
entitlementtobenets.
NOTICE
Machine damage if you violate these regulations
If you violate the following regulations, your machine may get
damagedand/orcausedamageinthesurroundingarea(s).
hThoroughly follow all instructions and information in
this section.
2.2.1 Intended use
The machine and the manufacturing software have been
designed for the commercial creation of dental objects by
specially trained persons. The objects require additional work
before their use on patients.
hOnly process materials that you can select in the manu-
facturing software.
hOnly use the machine and manufacturing software in a
commercial environment.
hBefore creating jobs, verify if the objects being pre-
pared may be utilized at the place of use according to
localand/ornationalregulationsorotherauthorized
organizations or entities (e.g. professional associations,
health authorities). In particular, verify if the materi-
al is approved for the machined object type and if the
object type is designed in accordance with applicable
regulations. Neither the manufacturing software nor
the machine will inform you about possible regulatory
infringements, but will execute jobs in accordance with
the preferences and materials set by the user.
hVerify that each object type and each material in your
jobs are authorized manufacturing materials. If man-
dated by local or national regulations, obtain relevant
authorization from the responsible organizations or en-
tities (e.g. professional associations, health authorities).
hOnly manufacture objects which correspond to the ob-
ject types that you can select in the manufacturing soft-
ware.Whileyoucanimport/ manufactureanyother
objects as well, neither the manufacturing software nor
the machine are designed for these other objects and
should not be used in this way.
hDo not manufacture implants or parts of objects that
are designed to have contact with implants. These parts
include parts of two-part abutments which contain the
connection geometry for the implant. Do not manipulate
the connection geometry of prefabricated abutments
(“prefababutments”)and youmust alwayscheck n-
ished objects for accurate connection geometries (i.e.
that connection geometries of nished jobs have not
been damaged).
2.2.2 Controlling the machine through software
You control the machine through specially designed applica-
tions which are supplied with the machine.
hAlwaysusethelatestprogramversionthatociallysup-
ports your machine.
hBefore installing or operating the machine, read the doc-
umentation for the applications.
hEnsure that your CAM computer meets all system re-
quirements.
2.2.3 Maintenance and cleaning
Maintenance and cleaning is part of standard machine usage.
hClean and maintain the machine as required. Only then
can the machine reach a long service life.
2.2.4 Spindle
The spindle of your machine is a high-precision instrument.
hDo not use unbalanced tools at high rotational speeds.
Such an imbalance puts a great strain on the spindle’s
ball bearings, which can cause the bearings to be dam-
aged.
hWhen working in the working chamber, do not apply
manual pressure against the spindle.
2.2.5 Unattended operation
If the machine runs unattended, the risk of material damage
is increased.

7
Original Operating Instructions: K4 edition
Document version: E – 02/2020
General safety instructions & operating regulations
hOnly allow unattended operation of the machine to oc-
cur if the following conditions are met:
The national and local laws allow it.
The working chamber is completely clean.
Unauthorized users cannot access the machine.
The room in which the machine is located has an auto-
maticredetectionsystem.
2.2.6 Transportation and storage
WARNING
Injuries caused by unsafe transportation
If you transport the machine unsafely, the machine may slip
and cause injuries.
hAlways transport unpacked machines
individually and do not stack them.
hEnsure that only trained personnel transport the ma-
chine to and from the installation site.
hEnsure that the housing of the machine is completely
closed.
hAlways transport the machine in an upright position.
hTransportandpositionthemachinewith2people.
hGrab unpacked machines only at the left and right grips
located at the bottom of the machine.
NOTICE
Short-circuit hazard when the machine is too
cold
If the machine is transported from a cold environment into
a warmer environment, a short circuit may occur caused by
condensate.
hBefore switching on the machine after transportation,
ensure the following:
The ambient air has the allowed temperature.
The machine has the same temperature as the ambient
air. This will take at least 48 hours.
The machine is completely dry.
hEnsure that the following conditions are met during the
whole transportation and/or storage period:
Ambient temperature (storage/transport): between
-20°C(-4°F)and60°C(140°F)
Relative air moisture: max. 80 %, non-condensing
Preparing transportation or storage
Before transporting or storing your machine, the following
preparations are necessary:
M1. Remove all blanks from the working chamber.
M2. Clean the working chamber.
M3. Install the transport lock. For this, see the correspond-
ing steps on the supplement.
M4. Ensure that the housing of the machine is completely
closed.
M5. Switchothemachineatthemainpowerswitch.
M6. Disassemble the machine components by following the
installation instructions in reverse order.
M7. In case of overseas transport, take proper measures
against corrosion.
Repackaging
To repack the machine after preparing its transportation or
storage, the following steps are necessary:
M1. If possible, use the original packaging. If the original
packaging is not available, use a packaging of similar
size and quality.
bOriginal packaging is available from customer service.
M2. Pack the machine and its accessories securely.
M3. Protect the packaging against slipping. If machines are
properly packed and protected against slipping, they
may be stacked.

8Original Operating Instructions: K4 edition
Document version: E – 02/2020
Machine description
3 Machine description

12
3
4
5
6

[1] Machine housing
[2] Working chamber door
[3] Grip for opening the working chamber door
[4] Opening for the air extraction system
[5] Connection panel (Fig. 2)
[6] Service unit
With your K4 edition you can process blanksofdierentma-
terials to create high quality objects for the dental sector.
Youcanndalistofthematerialswhichyoucanprocesswith
the K4 edition in the DentalCAM manufacturing software.
3.1 Connection panel

1
2
4
5
3

[1] Switching output for suction device
[2] Main power switch
[3] USB connection
[4] Power connection 100 – 240 V AC, 50/60 Hz, including
glass fuse 250V/5Asb
[5] Pneumatic connection
3.2 Working chamber door
The working chamber door locks the working chamber and
protects the user from injuries during operation.
CAUTION
Crushing hazard when opening or closing the
working chamber door
When you open or close the working chamber door, the mov-
ingworkingchamberdoormaycrushyourngers.Objects
on the machine may fall and cause injury or damage.
hWhen you open and close the working chamber door,
use one hand and keep the other hand away from the
machine.
hWhen you close the working chamber door, ensure your
hands do not get caught between the door and the ma-
chine housing.
hDo not place objects on the machine.
NOTICE
Damaging of the machine when opening the
working chamber door by force
When the Machine is not supplied with power or when the
axes are moving, the working chamber door remains locked.
If you open the locked working chamber door by force, the
machine may get damaged.
hNever open the working chamber door by force.
hConnect the machine to the electrical source and switch
itonrstbeforeopeningtheworking chamber door.
hTo open the working chamber door, grasp the grip and
pull the working chamber door upwards.
 
hTo close the working chamber door, grasp the grip and
push the working chamber door downwards.

9
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Machine description
3.3 Working chamber
The machine processes all blanks in the working chamber.

1
2
5
4
3

[1] Spindle
[2] Tool magazine for up to 7 tools
[3] Measuring key for measuring the tool length
[4] Blank holder and rotational axis A
[5] Collet chuck for picking up tools
3.4 Air extraction concept
The air extraction concept consists of:
The sealing air of the spindle
The external air extraction system (suction device,
suction hose, optional switching unit)
The vacuum sensor
During job execution, the spindle constantly blows air into
the working chamber (Fig. 5, upper arrows)
An external suction device that you connect to the Machine
with a suction hose extracts the machining debris from the
working chamber (Fig. 5, lower arrow).
This concept decreases the soiling and wear of sensitive ma-
chine parts.
n The air extraction system does not replace the regular
cleaning of the machine. Without regular cleaning, the
machinelifedecreasessignicantly.
Through the air extraction, a vacuum develops in the working
chamber which is constantly monitored by a vacuum sensor
(display in DentalCNC: chapter 4.8, page 17). If the vac-
uum is too weak, machining is not possible. If the vacuum
becomes too weak during a running job, DentalCNC inter-
ruptsmachininguntilthevacuumissucientagain(chap-
ter 5.7, page 20).
The current strength of the vacuum displays in DentalCNC
(chapter 4.8, page 17 or in documentation for the man-
ufacturing software).
 
3.5 Manufacturing software and CAM computer
To operate the machine, you must use a computer running
Windows® (“CAM computer“) which should connect to the
machine via the provided USB cable.
You can process manufacturing jobs with the CAM computer
in 2 steps:
1. With DentalCAM you can create jobs with the objects
that you want to machine. DentalCAM already contains
allimportantparametersforthedierentmaterials.
2. You can execute the jobs with the CNC software
DentalCNC. This application oers additional mainte-
nance and control functions for the machine.
bYou must use a dierent computer together with a
scanner and suitable software to create 3D models of
the objects (not provided, sold by specialist dealers).
3.6 Sound emission
The actual sound emission of the machine varies heavily de-
pending on the manufacturing material and the machining
conditions.
hIf the machine is too loud, check the operating condi-
tions. Ensure that the blankisxedproperly,checkthe
condition of the tool and the material in use.
hIf loud noise cannot be avoided, wear ear protection
during machining.
Sound measurement
Measuring conditions:
Processed material: CoCr
Tool status: new
Distance to sound source: 1 m
Measurement according to ISO 3746, engineering
method 3

10 Original Operating Instructions: K4 edition
Document version: E – 02/2020
Machine description
Operating condition Maximum A-weighted sound
pressure level
Processing 71 dB(A)
All other operating conditions
(tool change, movement of the
axes etc.)
<77 dB(A)
Technical data
Base system
Dimensions (W/D/H): approx. 400 x 385 x 410 mm
(15.8 x 15.2 x 16.1 in)
Weight: approx. 45 kg (99 lbs)
Ambient temperature (storage/transport): between
-20°C(-4°F)and60°C(140°F)
Ambient temperature (operation): between 10°C
(50°F)and32°C(90°F)
Relative air moisture maximum 80%, non-condensing
Air pressure (min./max.): 6 bar (90 psi)/8 bar (120 psi)
Recommended air pressure: 7 bar (100 psi)
Air consumption: approx. 50 l/min (1.8 cfm)
at 6 bar (90 psi), approx. 80 l/min (2.8 cfm) at
8 bar (120 psi)
Air purity according to ISO 8573-1:2010
4-axis mechanism;
positioning range (x/y/z): 100 x 100 x 40 mm
(3.9 x 3.9 x 1.6 in)
Complete housing of the working chamber; working
chamber door with a safety contact and safety interlock
Vacuum sensor for monitoring the extraction capacity
Required extraction capacity:
2000 l/min at 220 hPa (70.6 cfm at 3.2 psi)
Working chamber lighting
Rotary axis
Rotationrange:360°
Backlash-free rotary axis with Harmonic drive®
Integrated blank holder
Spindle
Asynchronous spindle rotating up to 60.000 U/min
Nominal power under continuous load (S1): 170 Watts
Maximal Power (Pmax): 240 Watts
Precision bearing
Pneumatic collet chuck Ø 3 mm
Sealing air
Tool magazine and tool change
Automatic tool change
Tool magazine for 7 tools
Maximum tool length: 35 mm
Automatic tool length measurement and tool breakage
monitoring via measuring key
Compressed air monitoring for the automatic tool
change
Distances to maintain Rotary axis
10
10
75
49
All measurements in centimeters
Work area
25
A

11
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
4 Installing the machine
4.1 Checking the scope of delivery
M Unpack the machine and ensure you have received the
following items:
1 2
3456
7 8 9 10
11 12 13
[1] 1 Machine K4 edition
[2] 1 spindle service set
[3] 1 power supply cord
[4] 1 USB cable
[5] 1 service unit for compressed air
[6] 1 hex key (3 mm) for the blank change
[7] 1 drill bit (2.8 mm) for tool positions
[8] 1 calibration set: 1 micrometer, 3 discs,
1 calibration tool
[9] 1 measuring pin
[10] 1 key for the emergency release of the working chamber
door
[11] 1 hose connection for the external air extraction system
[12] 1 pneumatic hose (0.5 m length)
[13] 7 tool magazine inserts (as spare parts)
Without illustrations:
This document
hPlease keep the machine packaging for future transport.
4.2 Choosing the installation site
The installation site must meet the following criteria:
Firm and even surface, must carry the weight of the
machine
Ambient temperature (storage/transport): between
-20°C(-4°F)and60°C(140°F)
Ambient temperature (operation): between 10°C
(50°F)and32°C(90°F)
Relative air moisture maximum 80%, non-condensing
Machine location must be dust-free
Alternating current source with 100 – 240 V and 50/60
Hz, max. 300 W
Compressed air supply that meets the requirements of
the machine (chapter 4.4, page 13)
Sucientspaceatthesidesofthemachine
(page 10)

12 Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
4.3 Machine installation (scheme)
*optional
USB cable connection
Compressed air connection
Power connection
Suction hose
Basic connections
Power connection switching unit*
Power connection without a switching unit
2 alternatives: power connection of the suction device
Control cable of the switching unit
2 alternatives: Control of the suction device*
External compressed
air supply
NOTICE
Damage to the machine due to incorrect
installation
hCarry out the installation in the given order.

13
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
4.4 Installing the pneumatics
WARNING
Risk of injuries through leaking compressed air
and lashing pneumatic hoses
Open or loose pneumatic connections can cause severe in-
juries.
hMake sure that during installation and service of the
pneumatic hoses and of the service unit compressed air
is not running through the hoses and connections.
hAfter installing the pneumatic hoses but before running
compressed air through the hoses and connectors, check
if the hoses are securely inserted into the correct connec-
tors and are not damaged.
hDo not run compressed air through damaged hoses and
connectors.
NOTICE
The spindle may suffer bearing damage and
electrical damage if the compressed air is
contaminated
The incoming compressed air must be dry and oil-free ac-
cording to ISO 8573-1 because the service unit only serves as
an indicator for contaminated air.
Air purity according to ISO 8573-1
Solid particles Class 3 Filtration degree
better than 5 µm
for solid particles
Water content Class 4 Maximum pressure
dewpoint+3°C
Residual oil content Class 3 Maximum oil con-
tent: 1 mg/m³
hEnsure that the compressed air meets the above require-
ments.
hConnect the machine to the compressed air supply only
via the provided service unit.
The spindle requires compressed air for the following tasks:
For the opening and closing of the collet chuck during
tool change.
For the sealing air which prevents foreign bodies from
entering the spindle.
Air consumption of the machine:
approx. 50 l/min (1.8 cfm) at 6 bar (90 psi)
approx. 80 l/min (2.8 cfm) at 8 bar (120 psi)
4.4.1 Overview service unit
Via the service unit you connect the Machine to your com-
pressed air supply and regulate the incoming pressure for the
machine.

1
2
3
4
5
6

[1] Rotary knob for pressure regulation
[2] Pneumatic connection to the machine (ø 6 mm)
[3] Manometer for monitoring the outgoing pressure
[4] Water separator
[5] Discharging screw
[6] Pneumatic connection for external compressed air
supply
4.4.2 Mounting the service unit on the Machine
NOTICE
Failure of the water separator caused by a
wrong alignment of the service unit
The service unit must always be mounted in an upright po-
sition because otherwise the water separator will not work.
hMount the service unit in an upright position (Fig. 6).
On the left side of the Machine are two bores which you can
use to mount the service unit on the machine.
M Mount the service unit in an upright position, using
the lens head screws provided in the bores.

14 Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
 
4.4.3 Installing the pneumatic hoses to the service unit

External compressed
air supply

M1. Close the external compressed air supply valve.
M2. Use the provided pneumatic hose to connect the right
pneumatic connection of the service unit [Fig. 6, 2]
with the pneumatic connection of the machine.
M3. Connect the external compressed air supply with the
left pneumatic connection of the service unit [Fig. 6,
6].
M4. Check the installation carefully for errors and damage.
Do not run compressed air through damaged or loose
hosesandconnections!
M5. Open the external compressed air supply.
M6. Check the air pressure on the manometer [Fig. 6, 3]. If it
does not lie between 6 bar (90 psi) and 8 bar (120 psi),
adjust it with the service unit (chapter 4.4.4).
4.4.4 Adjusting the air pressure with the service unit
Setting the air pressure is only necessary if the air pressure
shown by the manometer does not lie between 6 bar (90 psi)
and 8 bar (120 psi).
M1. Check if the service unit is correctly connected to the
machine and the compressed air supply (chap-
ter 4.4.2, page 13 onwards).
M2. Pull the rotary knob on top of the service unit slightly
upwards.
M3. Turn the rotary knob in the desired direction until the
pressure lies between 6 bar (90 psi) and 8 bar (120 psi)
(recommended: 7 bar (100 psi)):
Turning it towards “+“ you increase the pressure
Turning it towards “–“ you decrease it
M4. Push the rotary knob down again.
The knob is locked and cannot be changed inadver-
tently.

1. 3.
2.


15
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
4.5 Installing the air extraction system
bHow the air extraction system works: chapter 3.4,
page 9
Available components of the air extraction system:
Suction device including suction hose
Data cable for supported suction devices: enables the
communication between the machine and the device
(e.g.forswitchingthedeviceonando)
Switching unit for switching the suction device on and
oviatheMachine
Hose connection for suction hose: if the suction hose
doesnottintothemachine
Which components are required and how you can combine
them is listed in the following table.
Component Source Required?
Suction device Customer service,
specialist dealers Yes
Switching device Customer service No
Hose connection Scope of delivery,
customer service If the suction hose doesnott
You obtain the cable or switching unit via customer service
if necessary.
4.5.1 Requirements for the suction device
hUse a suction device with the following properties only:
Designed for the commercial use in the dental sector
EquippedwithalterofthelterclassM
Suitable for the operating site of the Machine
Equipped with safety devices which protect you from
static discharges (e.g. through an anti-static suction
hose)
Minimum extraction capacity:
2000 l/min at 220 hPa (70.6 cfm at 3.2 psi)
4.5.2 Installing the suction device
M1. Before the installation of the suction device read the
documentation for the device and have the documen-
tation always ready at hand.
M2. Check if the connection of the suction hose has an
outerdiameterof45mm.Ifthediameterisdierent,
use the provided hose connection (chapter 4.5.3,
page 15).
M3. Insert the suction hose of the suction device into the
opening for the air extraction of the Machine. Make
surethatthesuctionhoseisrmlyconnected.
 
M4. If you want the machine to automatically switch the
suction device on and o, install the switching unit
(chapter 4.5.4, page 16). If you require a switch-
ing unit, contact customer service.
M5. Continue with the installation of the suction device as
described in the documentation for the device.
4.5.3 Connecting the suction hose with the provided
hose connection
n If you can connect the suction hose of your suction de-
vice directly to the Machine, you do not need the hose
connection.
M1. Turn the thread of the hose connection counter-clock-
wise until the connection is completely open. If the
thread gets detached from the hose connection, place
it onto the connection again and turn it clockwise once
so that it is screwed to the connection again.
M2. Insert the suction hose of the suction device completely
into the hose connection on the side of the thread.
 
M3. Turn the thread of the hose connector clockwise up to
the stop.
Thesuctionhoseisrmlyattachedtothehoseconnec-
tion.

16 Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
M4. Insert the hose connection into the opening for the air
extractionsystemof themachine.Ensureit isrmly
connected.
 

The installation of the suction hose with the hose con-
nection is complete.
4.5.4 Installing the switching unit
M1. Connect the power cable of the suction device to the
switching unit.
M2. Connect the control cable of the switching unit to the
switching output at the connection panel of the Ma-
chine.
M3. Plug the switching unit into a power socket.
 

4.6 Establishing the electric connection
NOTICE
Damaging of the machine through heavy
voltage fluctuations
Heavyvoltageuctuationscandisruptthecontrolunitand
can cause system failures.
hPlug the machine’s power cord in a dedicated circuit cur-
rent or ensure that no devices are connected that can
causeheavyvoltageuctuationwhenswitchedon.
hIfheavyvoltageuctuationscannotbeavoided,installa
suitable device which protects the machine from heavy
voltageuctuations.
M1. Plug the provided power cord into the power connec-
tion at the connection panel of the Machine.
M2. If power failures occur regularly at your location, install
a suitable Uninterruptible Power Supply (UPS).
n If a power failure occurs during job execution, the tool
may break and the blank may be destroyed.
M3. Put the plug of the cord into a socket that is protected
by a Residual Current Device/Ground Fault Circuit In-
terrupter.
4.7 Connecting the CAM computer
M1. Switch on the machine.
M2. Close the working chamber door.
M3. Start the CAM computer.
M4. Use the provided USB cable to connect a USB port of
your computer or docking station with the connection
panel of your Machine.
S5. Install the newest version of DentalCAM and DentalCNC
that is released for the machine. For more information
on this, read the documentation for the applications.
S6. Start DentalCNC and click on the depicted icon
in the icon bar.
S7. Click on the depicted icon in the lower icon
bar.
The application settings view displays.
S8. Click on the depicted icon beside the text Port
number.
DentalCNC will try to establish a connection to the Ma-
chine. If this is successful, the application will display
the port number beside the icon and the machine ref-
erences.
n The machine will not reference if the working chamber
door is open.

17
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Installing the machine
M9. If the working chamber door was open at step S8, close
it. If the machine does not reference as a result, quit
DentalCNC and restart the application.
M10. If DentalCNC did not determine the port number, read
how to determine the port number manually in the
documentation for the application.
4.8 Testing the machine
Aftertherstinstallationorafterare-installation,forexam-
ple after a transport, you should test the basic functions of
the machine.
M1. Switch on the machine.
M2. Close the working chamber door.
The machine starts up. The working chamber is illu-
minated.
M3. Open the compressed air supply valve.
S4. Start the CAM computer and start DentalCNC.
The machine will reference. The machine is now in de-
.
S5. In the upper icon bar, click on the depicted
icon.
M6. Switch on the suction device and select the necessary
extraction level.
M7. If you use the recommended suction device together
with the data cable, switch the device into the “CAM-
mode”.
S8. If the machine controls the suction device via
the data cable or a switching unit, click on the
depicted icon.
The suction device is operating and a vacuum develops
in the working chamber.
M9. With the value bars and icons depicted below, verify
that the compressed air and the vacuum in the working
chamberaresucient.
The icons display in blue when the compressed air and
thevacuumaresucient.
 

S10. Move the spindle to the cleaning position by
clicking on the depicted icon.
The spindle should move through the working cham-
ber at constant speed.
S11. Move the spindle from the cleaning position
back to the default position by clicking on the
depicted icon.
The spindle moves to the default position at constant
speed.
S12. If the machine controls the suction device,
click on the depicted icon.
M13. Ifyoucontrolthesuctiondevicemanually,switchito.
The suction device stops operating.
M14. Open and close the working chamber door.
The working chamber door can be opened and closed
easily.
M15. If a result did not occur as described, check the follow-
ing depending on the error:
The USB connection & USB driver installation
(chapter 4.7 & documentation for the manufactur-
ing software)
The compressed air supply (chapter 4.4)
The set extraction capacity of the suction device
The installation of the air extraction system (chap-
ter 4.5, page 15)
M16. If you cannot solve a problem that occurred, contact
customer service.

18 Original Operating Instructions: K4 edition
Document version: E – 02/2020
Running the machine
5 Running the machine
5.1 Starting up the machine
M1. Close the working chamber door.
M2. Switch on the machine and the CAM computer.
The machine and CAM computer start up.
M3. If machine controls the suction device, switch on the
device and select the necessary extraction level.
The suction device is not running.
bIf you control your suction device manually, you will
switch on the device immediately before job execution.
S4. Start DentalCNC.
The machine references. The machine is now ready for
use.
n The machine will not reference if the working chamber
door is open.
M5. If the working chamber door was open at step S4, close
it.
S6. If the machine does not reference as a result, quit
DentalCNC and restart the application.
5.2 Job execution overview
NOTICE
Damaging of the machine when using damaged
tools or blanks
If tools or blanksaredamaged,partscanbreakoanddam-
age the machine during job execution.
hCheck the blanks and tools thoroughly for damage be-
fore every job execution.
Carrying out a typical job with the K4 edition is as follows:
1. Create a job in DentalCAM
2. Insert the tools into the machine
3. Mount the blanks into the machine
4. Execute the job in DentalCNC
The steps in the manufacturing software are described in the
corresponding documentation. The following text describes
how to perform manual work with the Machine.
5.3 Inserting/changing tools
NOTICE
Damaging of the spindle or the tool positions if
you use improper tools
Improper tools can damage the collet chuck of the spindle
and/or the tool positions.
hOnlyusetools withasuciently largechamfer atthe
tool shank.
hInstall a retaining ring as a stop ring according to DIN
471-A3.
hOnly insert tools with a maximum diameter of 3 mm at
the thickest part into the collet chuck.
hOnly insert tools with a maximum cutting edge diameter
of 2.6 mm into the tool magazine.
Þ We recommend original tools as they are designed es-
pecially for the designated jobs.
You can insert up to 7 tools into the tool magazine. The ma-
chine can change tools automatically during machining so
that it executes jobs without your interference.
 

You can equip the tool magazine in two ways:
Via the spindle – you insert a tool into the collet chuck
and the spindle will deposit the tool in the tool maga-
zine. This function is described in the documentation
for the manufacturing software.
By inserting the tools into the tool magazine manually.
This is described below.
You insert the tools manually as follows:
S1. Start DentalCNC.
S2. Call up the job execution view and select the job that
you want to execute from the job list.
DentalCNC displays the tools that are assigned to the
job in the lower part of the application window.
M3. Open the working chamber door.

19
Original Operating Instructions: K4 edition
Document version: E – 02/2020
Running the machine
M4. Insert the tools into the tool positions of the tool mag-
azine:
Insert the tools straight into the tool positions and
push them in until the ring touches the rubber
(Fig. 16).

90°

The positions of the tools in the tool magazine must
match the tool positions in DentalCNC (Fig. 17).
n If the positions of the tools in the tool magazine do not
match the tool positions in DentalCNC, the machine
will use the wrong tool(s) during job execution and
the job result will become unusable.

12
3
5
76
4



20 Original Operating Instructions: K4 edition
Document version: E – 02/2020
Running the machine
5.4 Mounting and removing blanks
On delivery, your K4 edition processes discs with a diameter
of 98.5 mm.
5.4.1 Mounting discs
You put discs into the blank holder and immobilize them with
a xingring.
 
M1. Open the working chamber door.
M2. Loosen the 4 screws which attach the xingring to the
blank holder.
M3. Remove the xingring and the disc in the blank holder
(if any).
M4. Place the desired disc into the groove of the blank hold-
er.
 
M5. Hold the disc in place with one hand and screw down
the screws you loosened in step M2.
n Tighten the screws rmly. If blanks move or vibrate
during processing, the result may become unusable.
5.4.2 Removing discs
M To unmount a disc, unscrew the 4 screws of the xing
ring and remove the xingring and the disc.
5.5 Executing jobs
n Do not move the machine during job execution, other-
wise the results may become imprecise.
M1. Make sure that the following requirements are met be-
fore job execution:
You created the job that you want to execute in
DentalCAM and transferred it to DentalCNC.
All required tools are assigned to the job in
DentalCNC.
The required tools are in the right positions in the tool
magazine of the machine.
All required blanks of the correct material are mount-
ed.
The compressed air supply is set correctly.
M2. Close the working chamber door.
M3. Switch on the suction device and set it to the required
level.
S4. Start the job execution in DentalCNC.
The Machine begins with the job execution.
5.6 Interrupting the job execution
S Click on the depicted icon to interrupt the job
execution. The icon only displays during job
operation.
5.7 Operation interruption or abortion of job
execution
An operation interruption can occur because the compressed
airsupplyorthevacuumintheworkingchamberisnotsu-
cient. An  job will normally be resumed automati-
cally after the error is corrected.
The job execution is 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 , you have to execute it again in DentalCNC.
5.7.1 How to proceed in case of an operation
interruption
If the job execution was interrupted, DentalCNC displays a
corresponding message.