Tucker GmbH,
Mail / Post:
Max-Eyth-Str.1, 35394 Gießen, Germany
Stud welding unit N800i
As of 24.08.2021
Manual part number: BE 1227
66
6.8 Weld process monitor
This inverter 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 proess 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 1A and 1 ms resolution, and the arc
energy and gun drop time are calculated for each weld.
6.8.1
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 histo ry is recorded. To save actual signals for all welds in
production permanently as record keeping, contact Nelson for
Nelware™ PC
software.
6.8.2
Set up weld monitor tolerance
Two tolerances must be configured: F34 gun drop time tolerance and F35 weld
energy tolerance. F34 sets up a time tolerance in milliseconds. For example, if F34 is
set to 10ms, it means the actual drop time can de viate 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.
6.8.3
Set up a target of good weld
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 h
old the ʺLockʺ
key until the display says the target is saved.
A target can be created for each preset. Choose a preset, make a good weld, and go
to F32. While viewing F32, press and hold the ʺLockʺ key until the display says the
Summary of Contents for N800iTM
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