65
PROBLEM
CAUSE
SOLUTION
Bevel cut
Electrode or nozzle worn
Replace both
Stand off too high
Lower stand off
Cutting speed too high
Regulate speed
Not enough penetration
Cutting speed too high
Regulate speed
Nozzle diameter too large with re-
spect to set current
Check Cutting Tables
Work piece thickness excessive with
respect to set current
Increase the cutting current
Earth lead not in good electric con-
tact with cutting surface
Check the tightness of the earth
terminal to CNC
Presence of
“low-speed dross” *
Cutting speed too low
Regulate speed
Cutting current too high
Reduce cutting current
Stand off too low
Raise stand off
Presence of
“high-speed dross” **
Cutting speed too high
Regulate speed
Cutting speed too low
Increase cutting speed
Stand off too high
Lower stand off
Rounded cutting edge
Cutting speed too high
Regulate speed
Stand off too high
Lower stand off
* The low speed dross is thick dross, of globular shape, easy to remove. The kerf is fairly large.
** The high speed dross is thin dross, hard to remove. In case of very high speed, the cut wall is rather rough.
Tab. 8
4.5 SYSTEM MAINTENANCE
A correct system maintenance ensures top performance
and extends the life of all the components, including con-
sumables parts. We therefore suggest performing the fol-
lowing maintenance jobs.
Period
Maintenance operations
Daily
Make sure the gas supply is at the right
pressure
Weekly
Make sure the power source, cooling
unit and gas console fans are working
correctly
Check coolant level
Clean the torch threads and make sure
there are no signs of corrosion or elec-
tric discharges
Monthly
Check the gas, water and electric con-
nections for any cracks, abrasions or
leaks
Run the TEST program through the gas
console.
Every six
months
Change the coolant in the system
Clean the external and tank filters of the
cooling unit
Clean the gas console filter
Replace the torch O-rings, and order the
kit art.1400
If, during an inspection, a highly worn component part
is found or one that is not working properly, contact the
CEBORA assistance service.
To service the inner parts of the different system com-
ponents, request the assistance of qualified personnel.
In particular, the following operations are best performed
periodically.
For all the component parts:
• Clean the inside with compressed air (clean, dry and
oil free) to eliminate any dust build up. If possible use
a vacuum cleaner;
• Make sure the power connections are tight and are not
overheating.
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