Tweco SL100 RPT - Manual (Page 5)

June 6, 2003 5 Manual 0-2937
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. Non - Genuine Thermal Dynamics Parts
4. Short Torch Parts Life
a. Oil or moisture in air source
b. Exceeding system capability (material too thick)
c. Excessive pilot arc time
d. Gas pressure too low
e. Improperly assembled torch
f. Non - Genuine Thermal Dynamics Parts
5. Difficult Starting
a. Worn torch consumables
b. Non - Genuine Thermal Dynamics Parts
6. Torch will not pilot
a. Upper O-ring on torch head in wrong position
Upper Groove
with Vent Holes
Must Remain Open
Threads
Upper O-Ring
in Correct Groove
Lower O-Ring A-03725
Inspection and Replacement of
Consumable Torch Parts
WARNINGS
Disconnect primary power to the system before
disassembling the torch or torch leads.
DO NOT touch any internal torch parts while the
AC indicator light of the Power Supply is ON.
Remove the consumable torch parts.
1. Inspect the cup for damage. Wipe it clean or replace
if damaged. Slag built up on the shield cup that can-
not be removed may affect the performance of the
system.
A-03598
Electrode
Starter Cartridge
Tip
Shield Cup
Assembly
Torch Head
2. Check the tip for excessive wear (indicated by an elon-
gated or oversized orifice). Clean or replace the tip if
necessary.
Good Tip Worn Tip
A-03406