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10

4-2 . Function and explanation

1)Voltmeter (Voltage): It will work at the time of no load or when the welding machine is put in

operation.

2)Amperemeter (Current): It will operate only at the time of welding (not work at the time of no

load)

3)Warning lamp (Error)

Abnormal power: In case input voltage drops below 20% of the standard voltage, lamp will be

turned on (stop)
Overload: It will be turned on (stop) when welding current rises sharply

Abnormal temperature: The temperature inside the machine reaches above 85 , it will be

turned on; in case the warning lamp is turned off after a certain period of time, the machine
will be operative for use.

4)Power lamp (power): It shows that power is supplied to the welding machine.

5)Power switch (power): The switch turns on and off the welder and it will shut off in case of

overload.

6)Crater voltage, current: When Weld Select Switch is set to Crater, it will be adjustable. Please

refer to Welding Chart (chapter 8) for welding conditions.

7)Arc quality: Depth of weld penetration in base metal, height and width of weld bead can be

adjusted depending on length of arc, current, and voltage.

Scale

Amount of Weld penetration

of welding rod

Height of weld bead Width of weld bead

0~ 6

Getting larger

Getting lower

Getting wider

0~ -6

Getting smaller

Getting higher

Getting narrower

8)Wire diameter select switch

9)Weld select switch
A)When there is no crater

It is operative only when torch switch is set to ON.

B)When there is a crater

Welding current start to flow when torch switch is turned on, and the

welding current keeps running even if the current is off; once the switch is turned on again, the
crater current begins to run, and when the switch is off, the welding is terminated.

10)Gas check : Gas check/welding

11)Fuse: It protects PCB (3A) and Motor (10A). Please use a fuse that meets standard

requirements.

Welding current (A)

100

150

200

250

300

400

500

Diameter of

wire ( .

Φ

mm)

0.8 1.0

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1.2

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1.6

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Summary of Contents for 350C

Page 1: ......

Page 2: ...structions furnished by user s manual Warranty Card Model Serial No Manufacture Date Ship Date Seller s Name SAMJIN WEL TECH Client Name Company Person 1 Warranty period is 12 months From the date on...

Page 3: ...ING AND OPERATION 5 SAFETY INTRODUCTION 6 MAINTENANCE AND INSPECTION 7 TROUBLE SHOOTINGS 8 WELD CONDITION 9 CO 2 MAG INVERTER CIRCUIT DIAGRAM Before using welding machine users have to read the all co...

Page 4: ...uration Type Item 350 C 500 C Input voltage AC 220V AC 415V 1 3 Phase Input power 16 KVA 26 5 KVA Frequency 50 60HZ Output current 50 350A 60 500A Max no load voltage 61V 70V Load voltage 16 36V 16 42...

Page 5: ...SQ or above 3 Installation 3 1 Installation Diagram Flg1 Full Installation Diagram Voltage selection Single phase Triple phase connection Connection with 1P Connection with 3P 3 2 Location of install...

Page 6: ...elding machine at a rated input voltage Since the welder is installed with a building out network for input voltage it will operate normally within a range of 10 of the input voltage Any excessive inp...

Page 7: ...off mode An instant applying of excessive voltage may cause malfunction of welder 3 8 Gas Connection 1 Connect CO2 gas to pressure regulator 2 Connect outlet hose of gas pressure regulator to the gas...

Page 8: ...Switch is set to Crater it will be adjustable Please refer to Welding Chart chapter 8 for welding conditions 7 Arc quality Depth of weld penetration in base metal height and width of weld bead can be...

Page 9: ...ith the friction of arc and protection of welded surface by gas 2 Welding torch If the welding torch is bent excessively smooth wire feeding is not available and welding condition is damaged due to re...

Page 10: ...smell 4 Any thing wrong in weld cable and connecting area 5 Is there any defective insulation on cable 3 6 month 1 Remove dust Remove dusts by blowing out dry compressed air Especially transformer re...

Page 11: ...noid valve Replace valve continuously Defect in control PCB Request A S Poor torch switch Replace torch switch Weld wire is not fed even Poor motor fuse Replace fuse though inching switch is Poor moto...

Page 12: ...patters Bead width becomes narrow The depth and height of weld penetration becomes bigger Arc voltage is too low Particle of spatter becomes smaller Bead width is widening The depth of weld penetratio...

Page 13: ...eep arc length short 4 Select proper welding current 3 Over lap 1 Too low arc voltage comparing to welding current 2 Welding speed is low 1 Raise arc voltage 2 speed up the welding speed 3 Curve bead...

Page 14: ...mm Gap mm Wire dia mm CT A Volt V Weld speed cm min 1 6 0 0 8 1 0 90 18 45 2 0 0 5 0 8 1 0 100 18 50 2 3 1 0 0 8 1 2 120 19 55 3 2 1 2 0 8 1 2 140 19 50 4 5 1 5 1 2 160 23 50 6 0 1 5 1 2 260 26 50 8...

Page 15: ...nt A Weld voltage V Weld speed cm min 1 6 3 0 0 8 1 0 130 20 50 2 0 3 0 1 0 1 2 130 20 45 2 3 3 0 1 0 1 2 140 20 5 45 3 2 4 0 1 0 1 2 170 21 45 4 5 4 5 1 2 230 23 50 6 0 6 0 1 2 290 28 50 9 0 7 0 1 2...

Page 16: ...15 3 2 1 2 150 180 20 22 45 50 10 15 10 15 4 5 1 2 200 250 24 26 40 50 10 15 10 15 Thickness mm Gap mm Wire dia mm Current A Voltage V Weld speed cm min 0 4 0 0 4 20 15 40 0 6 0 0 4 0 6 25 15 30 0 8 0...

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