Stud welding unit N1500i
Version 1.31 7.June.2013
Manual part number: 729-110-027
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Nelson Stud Welding, Inc. • 7900 West Ridge Road • Elyria, Ohio 44035 • USA
When you display F31 on the front panel and make a weld, F31 should
automatically update with actual drop time from the new weld. The
newly updated F31 value should match with tD in F32. Another way
is simply read tD in F32 from previous weld and adjust F31 to match it.
Generally speaking, this equation should hold within a few millise-
conds: Front Panel Time - F31 setting before a weld = tM in F32 - tD in
F32.
After calibration, tM in F32 should be fairly close to front panel time
within a few milliseconds. If not, then something in your gun, fastener,
or else in process is not exactly repeatable.
Special cases:
If the stud shorts before the gun coil is de-energized, or, if the stud
shorts after the weld current is shut off, the drop time (tD) can't be
measured.
In each case, F31 does not update. F32 (tD) shows each of these cases
in text. If the stud shorts before the gun coil is de-energized, adjust
weld energy (lift, current, time) so that the stud does not short during
the weld. If the stud shorts after the weld current is shut off, increase
F2 to give the machine a chance to measure drop time (tD).
Exit the F31 screen for production welding. Otherwise, F31 may be
continuously changing after each weld resulting in inconsistent set-
tings in production.
If you accidentally recall a preset, F31 value can be changed to the va-
lue associated with the preset. Check F31.
2.2.5
Weld Parameter Presets
The power source has ten available preset configurations. Each of
these is assigned a time and current setting for commonly welded
stud sizes. To select a preset, simply press key 1, 2, 3, 4, 5, 6, 7, 8, 9, 0.
When a preset is selected, the time and current are displayed on the
front panel, and the LED on the selected preset key lights.
Nelweld users are not restricted to pre-programmed presets, but may
save more usable weld settings. To do so, first select the desired time
and current settings using the corresponding Up/Down arrow. Then
press and hold the desired preset key for 4 seconds. The preset values
Note!
