Panasonic YD-200KR Operating Instructions Manual page 25

EXTENDED FUNCTIONS
 Self-hold Crater Operation with Initial Condition Function(SW6 Selected)
This is the same as "general self-hold crater operation" described in [BASICS] in that
it is a welding control sequence which assumes twice on/off operation of the
torch switch to be one cycle.
What differs from "general self-hold crater operation" is a period up to self-hold, that
is, welding output ranging from the first ON of the torch switch to its first OFF is a
condition (initial condition) set by the regulator identical with the one used for
adjustment of the crater welding condition.
Welding Arc Start
(Initial Condition)
Torch Switch ON
Operation Timing chart
Torch Switch
Gas Supply
Wire Feed
Welding Voltage
Welding Current
Welding Condition Adjustment
Tpf = Gas preflow time
Tips
 An initial condition welding period refers to a period between arc generation by
Initial torch switch-on and first torch switch-off.
 A regular welding period refers to a period between first torch switch-off and next
torch switch-on.

A crater welding period refers to a period between 2nd torch switch-on and next torch
switch-off
Changed to Welding
Arc for This
Welding Condition
(Self-hold )
Torch Switch
OFF
☆ = Arc start timing
★ = Arc stop timing
Changed to Welding Arc
for Crater
Condition
Torch Switch ON
Again
２１
APPLICATIONS
Welding Arc Stop
Welding
Torch Switch OFF
Again