Questions? Call or Text +1-801-658-0015 •
35
The Micro Welder Experts
Figure 35.1. The Sunstone PA250i will
digitally display the status of the gas
attached to the welder. Touch the Gas
Button to calibrate, purge, or adjust
other gas-related settings.
•
Post-Flow Delay Slider:
Allows you to set how long the gas will remain on after a weld has taken place.
Longer delays are useful for metals that oxidize quickly, such as titanium, where oxygen will cause
cracks while the molten metal is cooling.
•
Calibrate Gas Button:
Allows you to recalibrate the gas pressure to make sure the gas read out is accu-
rate. To calibrate, turn off the gas tank, disconnect the gas from the back of the Power Supply and press
the button. Then re-attach the gas to complete the calibration.
•
PSI Gauge:
Graphic representation of shield gas pressure.
•
Purge Gas Button:
Allows you to purge the line of air and or gas; useful for pressurization and to check
gas flow.
TIMING OPTIONS
Each slider has + and – buttons that will appear for five seconds after the slider has been adjusted. This screen
is only available in Arc and Tack modes (see Figure 36.1). When the system is in Weld Head mode this button will
be grayed out.
•
Pre-Weld Delay Slider:
Modifies the delay time between weld initiation (touch detect or foot pedal
press) and the actual arc formation. This can provide operators extra time to ensure correct position of
electrode.
•
Lift-off Delay Slider:
Adjusts the timing of the weld discharge (arc formation) in relation to the position
of the electrode as it retracts. The longer the delay, the further away from the workpiece the elec-
trode will be when the arc forms. Longer delay times can help improve electrode life, but may lead
to increased difficulty in starting or maintaining the arc (aborted welds). Longer delay times can also
increase weld spot size inconsistencies.
