Tweco CE PAK Master 150XL Without Latch Circuit - Manual (Page 43)

Manual 0-2696 5-3 SERVICE
5.03 Common Operating Faults
Listed below are common cutting problems followed by prob-
able causes of each. If the problems are caused by a torch
problem, refer to the appropriate Torch Manual.
1. Insufficient Penetration
a. Cutting speed too fast
b. Torch tilted too much
c. Incorrect Gas Settings
d. Metal too thick
e. Worn torch parts
f. Cutting current too low
g. Non-Genuine Thermal Dynamics Parts
2. Main Arc Extinguishes
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Cutting current too high
d. Work cable disconnected
e. Worn torch parts
f. Non-Genuine Thermal Dynamics Parts
3. Excessive Dross Formation
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Worn torch parts
d. Improper cutting current
e. Improper gas selection on settings
f. Non-Genuine Thermal Dynamics Parts
4. Short Torch Parts Life
a. Oil or moisture in gas source
b. Exceeding system capability (material too thick)
c. Excessive pilot arc time
d. Starting or finishing off the workpiece
e. Gas flow too low (incorrect pressure or flow setting)
f. Improperly assembled torch
g. Output current too high for parts being used
h. Torch tip contacting workpiece
i. Improper gas selection for parts being used
j. Damaged or loose torch head components
k. Restricted coolant flow
l. Non-Genuine Thermal Dynamics Parts
5. Poor Pilot Starting
a. Non-Genuine Thermal Dynamics Parts
b. High coolant conductivity
5.04 Common Operating Problems
WARNINGS
Disconnect primary power at the source before
disassembling the power supply, torch, or torch
leads.
Frequently review the Important Safety Precau-
tions in Section 1 of this Manual. Be sure the op-
erator is equipped with proper gloves, clothing, eye
and ear protection. Make sure no part of the
operator’s body comes into contact with the work-
piece while the torch is activated.
CAUTION
Sparks from the cutting process can cause damage
to coated, painted, and other surfaces such as glass,
plastic and metal.
NOTE
Handle torch leads with care and protect them from
damage.
A. Piloting
Piloting is harder on parts life than actual cutting because the
pilot arc is directed from the electrode to the tip rather than to a
workpiece. Whenever possible, avoid excessive pilot arc time
to improve parts life.
B. Torch Standoff
Improper standoff (the distance between the torch tip and work-
piece) can adversely affect tip life as well as shield cup life.
Standoff may also significantly affect the bevel angle. Reduc-
ing standoff will generally result in a more square cut.