Stud welding unit N1500i
Version 1.31 7.June.2013
Manual part number: 729-110-027
12
Nelson Stud Welding, Inc. • 7900 West Ridge Road • Elyria, Ohio 44035 • USA
2.2
Weld Parameters
You can program this unit in 2 ways: directly setting the current and
time values; or use the Stud Expert (tm) mode based on stud diameter.
2.2.1
Setting Current and Reading the Current Display
The current setting is the current setting during a weld, and can be
viewed in the front panel’s upper display. It can be changed using Up/
Down arrow keys to the right of the current display in one (1) amp in-
crements. As each of these keys are pressed, the current setting will in-
crease or decrease at a faster rate.
After each weld, actual current and time will be displayed briefly be-
fore the set values are displayed again.
If the display shows an actual weld time is much longer than program-
med, e.g., the sum of the front panel time and F2 (short circuit on-time),
a cold plunge may have occured that can result in a bad weld. If this
condition persists, it is recommended to do a gun calibration to set the
F31 value, and check the physical condition of the gun for any causes
of preventing a normal drop. If the actual weld time is less than the
front panel time, it means the arc shorted early, indicating a potential
improper gun lift setup.
When the display shows WAIT when the trigger is pulled, it means the
rated duty cycle is exceeded during operation (or other fault condition,
see section 7.3.19). It is advised to check the value of F2 and possibly
reduce the value of F2 to reduce the on-time and increase the studs per
minute without cold plunge.
In normal operating modes, the desired setting and the actual current
will be the same. In this situation the display does not change during
or after a weld. However, in conditions where it is not possible for the
power source to deliver the desired current, a warning light will light
on the front panel display. This typically occurs when using high cur-
rents with small or excessively long weld cables.
2.2.2
Setting the Time and Reading the Time Display
The time setting is displayed on the front panel lower display. It can
be changed using Up/Down arrow keys to the right of the time display
in one (1) millisecond (0.001 second) increments. As each of these keys
reinput power pressed, the time setting will increase or decrease at a
faster rate. The time display is used to display both the desired time
setting and the actual weld time.
In normal operating modes, the desired setting and the actual weld
time will be the same. When this is the case, the display does not chan-
ge during or after a weld. However, if an error condition occurs, the
