VHF N4 Impression - Page 37

Troubleshooting
37
Original instructions: N4 Impression
Document version: H – 05/2019
Ø
Is the blank attached properly?
M Ensure that all screws, pins and clamping mechanisms
xatetheblankrmly.
 chapter 5.4, page 19
Ø
Are the tool magazine inserts worn?
M Exchange the tool magazine inserts against new ones.
 chapter 6.15, page 34
Ø
Are screws, pins and clamping mechanisms as well as
the corresponding openings contaminated by pro-
cessing dust?
M
Clean the mentioned components thoroughly.
 chapter 6.4, page 25
Ø
Are the tools worn?
M Check the tools in the tool magazines and exchange
the worn tools with new ones. Also check the tool life
values which are shown in DentalCNC.
Ø
Do rings on the tools sit in the groove on the tool
shank?
M Check all tools and push rings that have moved into the
groove again.
Ø
Do the parameters of the job in DentalCAM corre-
spond to the parameters of the blank?
M
Make sure that the following parameters of the job and
of the blank correspond to each other and that they are
suitable for the objects that you want to machine:

Material type

Dimensions of the blank

Indications (types) of the individual objects
Ø
Do you use the newest version of the manufacturing
software that is released for the N4 Impression?
b
New versions often contain important optimizations.
S
Update the applications by clicking on the de-
picted icon. Alternatively, contact customer
service.
Ø
Are the STL les of sucient quality?
S1. Before you import STL les into the manufacturing
software, check their quality. Especially consider the
manufacturer information on wall thickness and bor
-
der thickness.
S2. If necessary, adjust the settings of your scanner and
scan application.
Ø
Are the bars of the individual objects set correctly?
S If you set bars, consider the corresponding information
in the documentation for DentalCAM.
Ø
Is the measuring key contaminated? This prevents a
correct tool measurement.
M Clean the measuring key with a brush.
 chapter 6.4, page 25
Ø
Is the collet chuck of the spindle contaminated or is it
loosely seated in the spindle?
M1. Clean the collet chuck with the provided spindle ser
-
vice set.
M2.
When you insert the collet chuck into the spindle,
make sure that it is properly seated.
 chapter 6.5, page 26
Ø
Did you calibrate the machine shortly before the
problems occurred or have there been any problems
recently with the tool change?
M Contact customer service.
Ø
Did you exchange the collet chuck at the recommend-
ed interval?
M
Verify the recommended interval for exchanging the
collet chuck in the maintenance table and exchange
the collet chuck if necessary.
 chapter 6.2, page 24
a
DentalCNC interrupts the job execution and dis-
plays that the ow rate is too low
b
You can resolve this problem while the job execution
is interrupted. DentalCNC continues the job as soon as
theowrateissucientagain.
Ø
Is there enough cooling liquid in the cooling liquid
tank?
M Ifnecessary,llasucientamount of coolingliquid
into the cooling liquid tank.
 chapter 4.5, page 14
Ø
Is the pump defective?
M Replace the pump against an original manufacturer’s
spare part.
 chapter 6.10, page 30
a
DentalCNC interrupts the job execution and dis-
plays that the air pressure is too low.
b
You can resolve this problem while the job execution
is interrupted. DentalCNC continues the job as soon as
theairpressureissucientagain.
Ø
Is the service unit properly set?
M Set the air pressure at the service unit to a value be-
tween 4 bar and 8 bar (recommended: 4.5 bar).
 chapter 4.4.4, page 14