N1500i FACS Manual
41
Part No. 729-110-053 V.1.03
© 2018 Nelson Stud Welding, Inc. All rights reserved.
3.8 Weld Process Monitor
This welder has a built-in weld process monitor to identify suspect
welds, also known as Not In Order (NIO) welds. This function works
without the use of a Personal Computer (PC). It monitors actual weld
process signals. When programmed as such, it will compare weld
process parameters to target values and report bad weld when the
actual signals deviate from the target values. The actual welding
current and voltage are recorded at 1 Amp and 1 millisecond resolution,
and the arc energy and gun drop time are calculated for each weld.
3.8.1 Actual weld process signals
Actual process signals are recorded and displayed after each weld,
shown in F32, weld results. Use the up / down button to scroll through
current, voltage, main current time, energy, drop time, pilot time and
pass/fail indicator. F32 is refreshed after each weld, and no weld history
is recorded. To save actual signals for all welds in production
per
manently as record keeping, contact Nelson for Nelware™ PC
software.
3.8.2 Set up weld monitor tolerance
Two tolerances must be configured: F34 gun drop time tolerance and
F35 weld energy tolerance.
F34 sets up a drop time tolerance in milliseconds. For example, if F34 is
set to 10ms, it means the actual drop time can deviate from the target
by ±10ms and the weld is still considered good weld.
F35 is a percentage tolerance of arc energy. For example, if F35 is set
to 10%, and a bad weld will be reported if the actual energy deviates from
target by more than ±10% of the target.
When either the drop time tolerance is exceeded, or the weld energy
tolerance is exceeded, the weld will be marked as bad or NIO. These
settings are global for all preset targets.
3.8.3 Set up good weld target
To save target without preset association (i.e. for welding without any
preset), exit any presets by manually changing the time and/or current
if necessary, so that no preset buttons are backlit. Make a good weld,
go to F32, press and hold the "Lock" key until the display says the target
is saved.
