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EXTENDED FUNCTIONS
Adjusting the Controls on the Printed Circuit Board
The following control functions are incorporated In this machine in order to improve weld
ability. They will work regardless of the settlings/operations of various switches on the
welding power unit operation panel.
The incorporated control functions can he adjusted with the controls on the printed
circuit board.
Incorporated
Control
Function
Burn-Back Time
(BBK) （Refer to
page 49）
Simple
voltage
Adjustment
（ Refer to page
49）
Preflow time
Afterflow time
Exterior ammeter
Adjustment
Already adjusted. Do not touch.
Switching the DC Reactor Tap
The DC reactor(DCL) of this machine(500KR2) has an intermediate tap.
Machine Type
YD-500KR2
The DC reactor improves the dynamic characteristic (short-circuit transient characteristic)
of the welding power unit, reduces spattering, and shape up the head.
When the number of turns is large, therefore, arc becomes mellow and spattering reduces.
When the number of turns is small, follow-up performance of arc will be improved with respect
to hand vibrations or quick feed of the torch.
Switch to the intermediate tap to reduce the number of turns as required.
[Controls on Printed Circuit Board]
Description
Adjusts a time until arc
burns up and goes off after
turning off the switch to
end welding unified
Adjusts a standard voltage
value when SIMFLE UNIFIED
is selected
Adjusts the Preflow time
Adjusts the Afterflow time
Adjusts
the
Exterior
ammeter
Intermediate Tap
Continuous Control
Control
range (Fully Left
to Fully Right)
Burn-up
VR5
Decrease-Increase
Standard
VR8
value
Increase
Preflow time
VR11
Decrease-Increase
(0.05 s-0.6 s)
Afterflow time
VR12
Decrease-Increase
(0.35 s-0.9 s)
Decrease-Increase
VR15
VR3 VR4
VR6 VR7
VR9
27 turns
29
Setting upon
Shipment
Center
position
voltage
Adjustment
decrease-
+
position
Adjustment
position
Adjustment
position
Center
position
Adjustment
--
position
Tap upon shipment
32 turns
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