© 2016 Nelson Stud Welding, Inc.
Page 8
All Rights Reserved.
January 2016
Part No. 729-110-043 Rev. 1.02
1.1.1
Contact Mode Capacitor Discharge Welding
1.2
NCD+ Contact Guns
This manual covers the NCD+ welding gun series including the Contact gun and the Contact gun
with the LED Option. These guns are very similar from the outside, however they are not
interchangeable. Each gun has its own specific mode of welding studs. The internal parts that are
different will be identified so you can easily determine which gun you have.
1.2.1
Operation of the Contact Gun
The NCD+ Contact Gun is a capacitor discharge contact gun. Since there is no coil, there is only
one wire that goes to the trigger. The other side of the trigger goes to the foot assembly. When the
trigger is pulled, the capacitors discharge as the stud is held firmly against the workpiece. The tip is
flashed off allowing the arc and stud plunge.
1.2.2
Operation of Contact Gun with LED Option
The LED option provides the user with remote indication of whether or not the unit is ready to weld
and after the weld if the measured values were within the selected weld parameters.
