15
WELD INDICATORS
Power on the Orion 250i2 . Once powered on, there are two indicator dots in the top left corner of the
screen . The top dot indicates the Weld Ready signal . The bottom dot indicates the Weld Good signal .
a . The Weld Ready dot will be red if the welder is not ready to weld, or green if the welder is ready to make
a weld .
b . The Weld Good dot will be red if the most recent weld was bad, green if the most recent weld was good,
or gray if a weld has yet been performed .
IGNITION SCREEN
Clicking on the “Ignition” button navigates to the screen pictured below where the user can adjust various
aspects of the weld discharge timing .
1. “LIFT-OFF DELAY”
controls the time between tip retraction and weld . Lower values will produce better
arc ignition consistency, but will contaminate the electrode tip more easily - resulting in shorter tip life .
Higher values will increase tip life, but will decrease the arc ignition consistency .
•If the EV unit seems to be misfiring often, clean and re-sharpen the tip of the electrode . If the problem
persists, try lowering the Lift-off Delay value . Make adjustments in increments of 10-20uS at a time,
because this delay can make a big difference .
•If the electrode seems to be sticking to the workpiece surface a lot, or the electrode tip seems unusually
contaminated, raise the Lift-off Delay value . Again, it is best to only adjust by 10-20uS at a time .
2. “MINIMUM TIME BETWEEN WELDS”
controls the minimum amount of time that must transpire before
another weld can occur .
3. “TIP RETRACT DISTANCE”
controls how far off the surface the electrode tip will be when a weld occurs .
Lower values will produce better arc ignition consistency .
4 . “Head Travel Delay” controls how long it takes for the head of the nozzle cone to reach the welding
surface .
THE “ST”
mode is recommended for most EV applications, but experimentation may show that
the other modes are better suited for specific applications .
