JESS WELDING MIG 296, Operating Instructions Manual

Page: 43 / 56

operation instructions page 14
Malfunction/error Cause Remedy
Irregular wire feed bad uncoiling of wire check / refit wire coil
wire-holding arbor check wire-
runs heavily holding arbor
wrong wire feed roller see chapter 5
wire feed
dirty / defective see chapter 5
wire guide tube or spiral wire feed
clogged / defective clean / exchange
current contact tip current contact tip
dirty/ rusty exchange
welding wire welding wire
wire guide tube misaligned see chapter 5
with wire feed roller groove wire feed
Porous weld seam workpiece surface polluted clean surface
(paint, rust, oil, grease)
no shieldig gas check / exchange
(solenoid valve not solenoid valve
opening)
insufficient shielding gas check shielding
gas at pressure
reducer
check gas line for
leakage using meter
tube
gas nozzle polluted clean gas nozzle
Poor weld performance 1 mains phase not check mains fuse
connected check mains cable
Wire burns back into current deficient wire feed, see chapter 5
contact tip at start of process feed rollers idling ´wire feed´
Wire burns back into current wire burnback set-point see chapter 4
tip nozzle at cut-off value too high control elements
Wire adheres to weld seam wire burnback set-point see chapter 4
after switch-off value too low ´control elements’