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3.2 Duty cycle
and Over- heat
The letter “X” stands for Duty Cycle, which is
defined as the portion of the time a welding machine
can weld continuously with it’s rated output current
within a certain time cycle (10 minutes).
The relation between the duty cycle “X” and the
output welding current “I” is shown as the right figure.
If the welding machine is overheating, the IGBT
over-heat protection sensing will send a signal to the
welding machine control unit to cut the output welding current OFF and light the over-heat pilot lamp
on the front panel. In that case, the machine should not be welding for 10-15 minutes to cool down
with the fanrunning. When operating the machine again, the welding output current or the duty cycle
should be reduced.
3.3 Equipment Connection
3.3.1 MIG
Gas shielded wire
Welding -
(1) Insert the earth cable plug into the negative socket on the front of the machine and tighten it.
(2) Plug the welding torch into the MIG torch connection socket on the front panel and tighten it.
IMPORTANT :
When connecting the torch be sure to tighten the connection. A loose connection
can result in the connector arcing and damaging the machine and gun connector.
(3) Connect the MIG power connection lead to the positive welding power output socket.
Note if this connection is not made, there will be no electrical connection to the welding torch!
(4) Connect the gas regulator to the gas cylinder and connect the gas line to the gas regulator.
Check for Leaks!
(5) Connect the gas line to gas connector on the rear panel.
Check for Leaks!
(6) Connect the power cable of welding machine with the output switch in electric box on site.
Содержание GRAND MIG 200 MULTI PFC SYN MV
Страница 23: ...5 4 Electrical schematic drawing...