Tweco SL80 Plasma Cutting - Manual (Page 5)

Manual 0-4797 5 October 20, 2006 Rev. AA.01
B. Difficult Starting Main Arc
1. Torch standoff too high from workpiece
2. Bad or no connection between work cable and workpiece
C. Main Arc Extinguishes
1. Cutting speed too slow
2. Torch standoff too high from workpiece
3. Bad or no connection between work cable and workpiece
4. Worn torch parts
D. Insufficient Penetration
1 Cutting speed too fast
2. Torch tilted too much
3. Metal too thick
4. Worn torch parts
5. Cutting current too low
E. Excessive Dross Formation
1. Cutting speed too slow
2. Torch standoff too high from workpiece
3. Worn torch parts
4. Improper cutting current
F. Short Torch Parts Life
1. Oil or moisture in air source
2. Exceeding system capability (material too thick)
3. Cutting speed too fast
4. Excessive pilot arc time
5. Gas pressure too low
6. Improperly assembled torch
7. Torch tip contacting work piece at or above 40Amps
Inspection and Replacement of
Consumable Torch Parts
A. General Information
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.
Unthread the shield cup assembly to 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 cannot
be removed may affect the performance of the system.
A-03645
Electrode
Start Cartridge
Tip
Shield Cup
Torch Head
2. Check the tip for excessive wear (indicated by an
elongated or oversized orifice). Clean or replace the tip if
necessary.
Good Tip Worn Tip
A-03406