WF-201
T AC/DC
© Weldclass 2019 | E.&O.E.
17
4.5.1
Pre-Flow Time / PRE GAS (36)
Pre-Gas (or Pre-Flow) setting is adjustable from 0 – 2 seconds. This controls the period of time the
shielding gas will flow when the torch is triggered before the arc starts. This purges the weld area from
atmospheric gas which could contaminate the start of the weld.
4.5.2
Start Current / START AMPS (37)
Available in 4T trigger mode only. This sets a welding current activated when the torch trigger button is
held on at the start of the weld. Once the trigger is released, the current will go through the upslope
(38) period if it is set, to the main welding current.
4.5.3
Slope Up / UP SLOPE (38)
Up Slope setting is adjustable from 0 – 10 seconds. When the trigger is activated, the welding current
will increase gradually over the time selected up to the main welding current.
4.5.4
Trough Current / TROUGH AMPS (39)
Available in Pulse mode only. This sets the level of the low/trough current of the pulse.
4.5.5
Pulse Wave Width / WIDTH (41)
When in Pulse mode: Sets the time proportion as a percentage between the peak current and trough
current. Neutral setting is 50% and the time period of the peak current and base current pulse is equal.
Higher pulse duty setting will give greater heat input, while lower pulse duty will have the opposite
effect. See 12.3.3 for more information.
When in Spot mode: Sets the portion of the weld cycle that is spent welding. For example if cycle time
is set to 10sec and with is 20% then the machine will weld for 2secs and pause for 8secs.
4.5.6
Pulse Wave Frequency / FREQUENCY (40)
Available in Pulse mode only. This sets the rate that the welding output alternates between the peak
and trough current settings. See 12.3.3 for more information.
4.5.7
Base/Peak Current / BASE/PEAK AMP (42)
When in Normal or Spot function this is the main welding current setting.
In Pulse mode this is the high/peak current of the pulse. See 12.3.3 for more information.
4.5.8
Slope Down / DOWN SLOPE (44)
Slope-Down time setting is adjustable from 0 – 10 seconds. When the trigger is released, the welding
current will reduce gradually over the time selected down to 0. This allows the operator to complete
the weld without leaving a ‘crater’ at the end of the weld pool.
4.5.9
End Current / FINISH AMPS (45)
Available in 4T trigger mode only, sets a welding current that is activated when the trigger is held on at
the end of the weld (to ‘unlatch’ the trigger before the weld is finished). If downslope (44) is set, the
current will go through the downslope period before going to the End Current setting. When the trigger
is released, the arc will stop.
4.5.10
Post Flow / POST GAS (46)
Controls the period of time the shielding gas continues to flow for after the arc is stopped. This protects
the weld area and torch tungsten from contamination while it is still hot enough to react with
atmospheric gases, after the weld is finished.
