Lincoln Electric IM946 CRUISER Digital Tractor - Manual (Page 89)

Cruiser™ Tractor
OPERATION
10-12 10-12
End Options
The downslope, crater, and burnback parameters are used to define the end of the weld
sequence. The are defined in the following:
• Downslope determines the amount of time it takes to ramp from the weld
parameters to the crater parameters. The transition is linear and may be up or
down depending on the relationship between the weld and crater settings.
• Crater parameters are typically used to fill the crater at the end of the weld and in-
clude both time and output settings.
• Burnback defines the amount of time the output remains on after the wire has
stopped. This feature is used to prevent the wire from sticking in the weld puddle
and to condition the end of the wire for the next weld. A burnback time of 0.4 sec-
ond is sufficient in most applications. The output level for burnback is generally set
to the same level as the last active weld sequence state (either weld or crater).
Restrike Timer
If the arc goes out for any reason (short circuit or open circuit), the system will enter re-
strike. During restrike, the WFS and outputs are driven in an attempt to re-establish the
arc.
The restrike timer determines how long the system will attempt to re-establish the arc
before it shuts down. It is described in the following:
• A restrike timer is used to protect the welding system and/or work piece being
welded.
• A restrike time of 1 to 2 seconds is sufficient in most applications.