7.2 Malfunctions
7 - 64
© Precitec GmbH & Co. KG • EN 09/2019
7.2.2
Mechanical malfunctions
Table 7-2
Error analysis: Mechanical malfunctions
Malfunction
Cause
Action to be taken
Cutting gas pressure does not
build up
Cutting gas hose is not connected
properly
– Connect the cutting gas hose
properly (see
)
Protective window cartridge loose or
protective window damaged
– Replace the protective window
cartridge or push in until it clicks into
place (see
)
Gasket between the ceramic part and
the sensor insert not tight
– Replace the worn gasket (see
Cutting gas escapes somewhere else
– Send the laser head back for repair
Nozzle is getting too hot
Laser beam obstructed
(bad focus centring)
– Check the focus centring
)
Gases and liquids do not
reach the cutting point
Gas and liquid hoses are not
connected properly
– Connect the gas and liquid hoses
,
Gases and liquids escape at other
places
– Send the laser head back for repair
Beam position centring device
difficult to turn
Adjusting screw threads damaged
or dirty
– Send the laser head back for repair
)
Vertical adjustment device
(indicating dial)
for adjusting the
focal position difficult to turn
Mechanical adjustment parts
damaged or dirty
– Send the laser head back for repair
)
Focal position cannot be
found in the adjustment range
of the vertical adjustment
device
Wrong focal length of the focusing
lens or focusing lens damaged
– Replace the laser head
– Send the laser head back for repair
Bad cut
• Focus diameter too large
• Wrong focusing lens installed in
the laser head
• Focusing lens damaged or wrong
focal length
– Replace the laser head
– Send the laser head back for repair
Bad focal position/centring
– Check the focal position/centring,
remove the error if necessary
(see
)
Protective window dirty
– Clean the protective window and
)
Influence of the alloy
(work piece)
– Adjust cutting parameters
