Nelson Nelweld 4000, Руководство по эксплуатации и обслуживанию

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Nelweld Operations and Service Manual
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cool, and is represented by t
9
on the “Timing
Diagrams” in Section 7.1 of this guide. It is
set using special function F42 and has a
default value of 200 milliseconds (0.200
seconds).
• Chuck stripper hold time – This is the length
of time that the gun coil is energized during
the chuck stripping process. It is represented
by t
10
on the “Timing Diagrams” in Section
7.1 of this guide. The hold time is set using
special function F43 and has a default value
of 50 milliseconds (0.050 seconds).
4.6.14 Lift Check
The power source features a lift check function
that allows the gun lift distance to be quickly
verified and to simplify lift adjustment.
To perform a lift check, first load a stud and
ferrule into the gun with the proper plunge setting
for welding. Then, press the stud against an
insulating workpiece, namely wood or similar
non-conductive surface. Pull and hold the gun
trigger. The gun will energize for the weld time
set on the front panel.
Continue to hold the gun
trigger. After the lift check delay time, the gun
coil will energize a second time and remain
energized for the time specified by the user. This
second energizing time is the lift check hold time.
When the gun lifts during the second time, a scale
may be placed next to the stud to measure the lift.
If a non-conductive workpiece is not
available, the gun may be air triggered,
and pressed against any surface
only after
the first gun lift .
The lift check function times outlined above are
adjusted as follows:
• Lift Check Delay Time – this time is
represented by t
6
on the “Timing Diagrams”
in Section 7.1 of this guide. It can be adjusted
using special function F12. It has a default
value of 2000 milliseconds (2.000 seconds)
when lift check is enabled.
Lift Check Hold Time – this time is represented
by t
8
on the “Timing Diagrams” in the Section 7.1
of this guide. It can be adjusted using special
function F13. It has a default value of 2000
milliseconds (2.000 seconds) when lift check is
enabled.
For safety reasons, once in the lift check mode,
machine output is disabled and no voltage is
present in the gun.
Ensure that there is no contact
between current-carrying gun components and a
grounded workpiece when initiating a lift check.
To disable the lift check option, change the value
of special function F11 to 0.
4.6.15 Weld Through Deck Mode
The Nelweld power sources can be optimized to
perform the weld-through-deck process by
using special function F2. When enabled,
the plunge time is extended to 180
milliseconds (0.180 seconds) and the maximum
weld time is increased to 2.5 seconds. The
Nelweld 6000 is shipped with the weld through
deck mode disabled.
4.6.16 Chuck Saver
The chuck saver circuit prevents damage to the
chuck after a weld is performed. This feature can
be disabled by adjusting special function F56.
When special function F56 is enabled: After a
weld is completed, the power source requires that
electrical contact with the workpiece is broken
before it allows the next weld to be initiated.
Therefore, if the gun trigger is pulled a second
time after a weld is complete, but contact has not
been broken to the welded stud, then the second
trigger pull is ignored.
When special function F56 is disabled: After a
weld is completed, the power source does not
require that electrical contact with the workpiece
is broken before it allows the next weld to be
initiated. Therefore, if the first weld attempt did
not complete, a second attempt can be made
without breaking contact between the stud and
workpiece. This function should be used
carefully as it is possible to weld the chuck to the
stud if a second weld is attempted after the first
weld was successful.