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
71
Due to low circuit inductance, it is possible to see current regulation errors when the
pulse low current is too low, or the gap between high and low levels is too big. Use
long and coiled cable around ferrous material can increase circuit inductance. By
default pulse main arc current is disabled.
6.11 Pulse Cleaning (during the beginning of main arc stage)
The welder normally outputs a constant low current in pilot arc to draw an arc before
turning on the main arc for welding. In some appli cations, it is desirable to have very
high and narrow pulses in the be
‐
ginning of main arc stage before engaging full
main arc. The potential benefits are the ability to pre
‐
clean the workpiece from
surface oxide stamping oil contamination in sheet metal, or thick or varying
galvanized surface, or mill
‐
scaled plate in fabrication, or shipyard plates coated with
weld
‐
able primer.
Pulse cleaning is enabled by enabling F37. For the peak pulse, it att
‐
empts to go the
maximum rated current for 4ms, with a 10ms pause (or low pilot current) in between.
Due to the inductance of the weld circuit, it is often below the set values. After each
pulse, the arc voltage is measured and compared with F38
‐
pulse cleaning threshold
voltage. When actual voltage is below F38, it proceeds to main current, other
‐
wise
another cleaning pulse will be sent. The maximum cleaning pulse count is set in F39.
Since the cleaning pulse is adaptive and thus the number of pulses can vary, it has a
small effect in increased total heat input. To make total energy consistent, F40 can
be used to subtract a time in the main arc time.
F49 = ON (Enabled)
F51
F52
F50
Summary of Contents for N800iTM
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