MAWA-050A
2. Installation and Connections
2-28
Timing chart when the argon gas flowrate is normal
ON
OFF
Argon gas flowrate
Digital flow meter output
Gas flow error detection
Pre-flow time
Welding current set time
Welding current (arc discharge)
After-flow time
Detection upper limit
Detection lower limit
Detection response time
Timing chart when the argon gas flowrate is abnormal
(1) When the pre-flow time: PRE < 300 ms, an error is detected at the welding start.
Since an error is detected after the welding start (= pre-flow time completed), an arc
discharge occurs for a moment.
ON
OFF
PRE
Argon gas flowrate
Digital flow meter output
Gas flow error detection
Pre-flow time
Welding current set time
Welding current (arc discharge)
Detection upper limit
Detection lower limit
