２３
EXTENDED FUNCTIONS
Adjusting the Controls on the Printed Circuit Board
The following control functions are incorporated In this machine in order to improve weldability.
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.
[Controls on Printed Circuit Board]
Incorporated
Control
Function
Description
Control
Continuous Control
range (Fully Left
to Fully Right)
Setting upon
Shipment
Burn-Back Time
(BBK)(Refer To
Page 44)
Adjusts a time until
arc burns up and goes
off after turning off
the
switch
to
end
welding unified
VR5
Burn-up
Decrease-Increase
Center
position
Simple
voltage
Adjustment (refer
to page 44)
Adjusts
a
standard
voltage
value
when
SIMFLE
UNIFIED
is
selected
VR8
Standard
voltage
value
decrease-
+
Increase
Adjustment
position
Preflow time
Adjusts
the
Preflow
time
VR11
Preflow time
Decrease-Increase
(0.05s-0.6s)
Adjustment
position
Afterflow time
Adjusts the Afterflow
time
VR12
Afterflow time
Decrease-Increase
(0.35s-0.9s)
Adjustment
position
Exterior ammeter
Adjustment
Adjusts the Exterior
ammeter
VR15
Decrease-Increase
Center
position
Already adjusted. Do not touch.
VR3
VR4
VR6
VR7
VR9
--
Adjustment
position
Switching the DC Reactor Tap
The DC reactor(DCL) of this machine(350KR1/500KR1) has an intermediate tap.
Machine Type
Intermediate Tap
Tap upon shipment
YD-200KR2
--
22 turns
YD-350KR2
22 turns
26 turns
YD-500KR2
27 turns
32 turns
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.
APPLIATIONS
