MBM PP 35 Manuel D'instructions Et D'entretien page 10

OPERATING FAULTS
During cutting operations performance faults may arise which are not caused by plant malfunctioning but by
other operational faults such as:
√
Insufficient penetration :
√
Interruption of the cutting arc:
√
Excessive scoria settlement:
√
Tilted cutting (not perpendicular):
√
Excessive wear of nozzle and electrodes:
MAINTENANCE
Maintenance can only be carried out on the unit if the person in charge of this operation has the necessary
technical knowledge and the correct tools. If this is not the case, contact your nearest service centre.
Never access inside the machine (panel removal) or touch the torch (disassemblage)
Any inspection performed under voltage inside the machine or inside the torch may cause
severe electric shocks caused by direct contact with parts under voltage.
UNIT
Inspect the unit every 3-4 months (depending on how often the unit is used) and use compressed air to
remove any dust deposits.
10
CAUTION!
without having disconnected power plug.
too high cutting speed;
torch is too tilted;
piece is too thick;
cutting current too low;
torch parts are worn out;
non-genuine Manufacturer's parts;
cutting speed too slow;
excessive distance between torch and workpiece;
AC line too low - reduce output current;
torch parts are worn out;
non-genuine Manufacturer's parts;
work cable is disconnected;
too low cutting speed (bottom dross);
too high cutting speed (top dross);
excessive distance between torch and workpiece;
cutting current too low;
torch parts are worn out;
non-genuine Manufacturer's parts;
Torch position not correct;
asymmetric wear of nozzle hole and/or wrong;
assemblage of the torch parts;
air pressure too low;
exceeding system capability (material too thick);
contaminated air (humidity-oil);
excessive pilot arc arc ignitions in the air;
Improperly assembled torch;
torch tip contacting workpiece;
damaged or loose torch head components;
non-genuine Manufacturer's parts.