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Summary of Contents for KeyGree MIG Series
- Page 1 MIG Series User's Manual...
- Page 2 3. The product conforms to GB15579 standard; 4. This product complies with the electromagnetic compatibility requirements for type A equipment. Chengdu KeyGree Technology Co.，Ltd. Address: No. 6668 Qingquan Avenue, Qingbaijiang District, Chengdu, Sichuan Province Zip code: 610300 Tel:4001887588 Website:www.keygree.com...
- Page 3 SAFETY PRECAUTIONS Precautions for Installation ELECTRIC SHOCK!!! Install the earthing device according to the applicable standard. Do not touch live parts while bare skin or wearing wet gloves or clothes. Insure you to insulate appearance with the ground and the work piece.
- Page 4 Precautions for Use Fume/smoke dust — It may be harmful to health. Welding would produce lots of gases and fumes that are harmful to the body. Avoid inhalation into the respiratory tract. Keep your head away from fumes while welding. Adopt adequate ventilation or exhaust facilities to ...
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Page 5: Table Of Contents
TABLE OF CONTENTS Chapter I Product Overview ............................6 1.1 Model explanation .............................6 1.2 General technical parameters ......................... 6 1.3 Dimension and weight ............................7 1.4 System composition ............................8 1.5 Description of functions and features ......................9 1.6 System characteristics ...........................10 Chapter II Installation and Wiring .......................... -
Page 6: Chapter I Product Overview
Chapter I Product Overview 1.1 Model explanation K: Wide voltage T: Integrated type Y: Single-phase 220V power supply A/B: Model code Rated output current code Semi-Automatic Metal Inert Gas Arc Welder Fig. 1-1 Model Explanation 1.2 General technical parameters See Table 1-1 for the general technical parameters of the welder. Table 1-1 General Technical Parameters Model Description Item... -
Page 7: Dimension And Weight
Table 1-2 General Technical Parameters Model Description MIG-500A/ MIG-630 Item MIG-270A MIG-315A MIG-350A MIG-350K MIG-500B heavy MIG-1000 industrial industry machine Rated input power Three-phase AC380V±10% 50Hz Rated input capacity 33.5 33.8 44.5 (KVA) Rated input current (A) Rated output of gas 1000A/44 shielded arc welding 270A/28V... -
Page 8: System Composition
Model MIG-250 MIG-250S MIG-2500 Outline dimension 470×210×340 470×210×340 470×210×340 (L×W×H) Weight (kg) 14.1 14.5 MIG-500 MIG-630 heavy Model MIG-500B MIG-500A industrial MIG-1000 industry machine Outline 1080×470×45 630×360×580 710×375×630 710×375×630 710×375×630 dimension 540×260×380 540×260×380 540×260×380 540×260×380 (L×W×H) 540×260×380 Weight (kg) 63.9 1.4 System composition 1) Composition (Taking MIG-270K all-in-one for example) -
Page 9: Description Of Functions And Features
5. One pair of quick plugs (all-in-one) 1.5 Description of functions and features MIG series is our inverter welder manufactured with advanced inverter technology, which is a more mature and stable product series. Superior IGBT inverter technology, frequency up to 28KHz, smaller volume, lighter weight, higher efficiency, and more energy-saving;... -
Page 10: System Characteristics
Having the ability to eliminate the molten droplets at the end of the wire after welding, supplemented by high no-load and slow wire feeding functions to improve the success rate of one-time arc striking; All separate types with self-locking/non-self-locking (crater on/off) functions, suitable for different welding needs;... -
Page 11: Chapter Ii Installation And Wiring
Chapter II Installation and Wiring 2.1 Installation requirements Environmental requirements: When selecting the installation environment, the following should be noted: Avoid installation in places with much dust and metal powder; Strictly prohibited to install in places with corrosive and explosive gases; ... - Page 12 method according to the base metal and electrode. In general, DC reverse method is recommended for basic electrodes (i.e., positive electrode). As for acid electrodes, there is no special requirement. 2) Operating method ① After correct installation as above, close the air switch on the rear panel to start up the welder. At the same time, the voltmeter shows the voltage as no-load voltage and the ammeter shows the preset current.
- Page 13 2) Installation of wire reel Install the wire reel with welding sticks on the damper of the wire feeder. The hole position of the wire reel should be aligned with the fixing pins of the damper and inserted properly. Select different contact tubes according to the diameter of the welding stick used. Loosen the nut of the wire-pressing wheel, feed the wire liner into the slot of the wire fee roll, adjust the wire-pressing wheel to press the wire to ensure that it does not slide, but make sure the pressure should not be too great to prevent the wire from being deformed and affecting wire feeding.
- Page 14 Since the arc light of gas shielded welding is much stronger than that of manual welding, be sure to put on a mask to block the light before operation. 3) Connection of the wire feeding end Connecting steps: ① Fasten the six-core control cable, gas tube and positive output welding cable using the end snap of the wire feeder.
- Page 15 Connection of welding torch and wire feeder Detailed connecting steps are given in the figure below. 4) Connection of earth clamp and cable (earth wire) Connect the other end of the earth clamp cable to the workpiece reliably and connect the workpiece with an appropriately sized earthing cable.
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Page 16: Welding Preparations
6) Please refer to Table 2-7 for the requirements for input power cable and earth wire. Table 2-7 Requirements for Input Power Cable and Input Earth Wire MIG-630 MIG-270 MIG-315/350 MIG-500 Size heavy MIG-1000 (all 270 models) (all 315/350 models) (all 500 models) industry Switching... -
Page 17: Do's And Don'ts
9/10/11 Electric arc operation at 75-200A 12/13 Electric arc operation at 200-400A Electric arc operation above 400A 2.4 Do's and don'ts 1) The installation area should be firm enough to support the welder. 2) It is forbidden to install the welder in places where water splashes may be generated, such as water pipes. -
Page 18: Chapter Iv Operating Instructions
Chapter IV Operating Instructions 4.1 Operating methods 1) After correct installation, turn on the power switch and push the power switch in the "ON" position. Then, the power indicator light will be on and the fan inside the welder will start rotating. 2) Open the valve of the gas bottle and adjust the flow meter to the desired flow rate. - Page 19 Each operation of the rear panel is shown in Figure 3-2. Item Part Name Part Function Controlling input power ON and Power switch Protective base plate and Junction box supporting machine Input sign Power input Forcing air cooling and heat Heating outlet dissipation Damper...
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Page 20: Panel Functions
4.3 Panel functions 1) Take the separate type welder MIG-500A as an example Front panel operation is shown in Figure 3-3. Item Part Name Part Function Current control Adjusting the output current knob magnitude Voltage Adjusting the welding adjustment knob voltage level Inductance Adjusting inductance... -
Page 21: Panel Functions
4.4 Panel functions 1) Take the separate type welder MIG-500 for heavy industry purpose as an example Front panel operation is shown in Figure 3-5. Item Part Name Part Function Current control Adjusting the output current knob magnitude Voltage Adjusting the welding voltage level adjustment knob Inductance Adjusting inductance... -
Page 22: Panel Functions
4.5 Panel functions The operation of the function button area is shown in Figure 3-7 (MIG-270/315/350B/500B/500A). Item Button Name Button Function Function Self-locking (4-step)/non-self-locking (2-step)/spot welding function switching Welding method Gas shielded welding/manual welding Wire diameter According to the diameter of the wire in use selection Gas Selection According to the gas in use... -
Page 23: Use Method Of Basic Welding Functions
4.6 Use method of basic welding functions The "function switching" on the panel and the torch switch allow welding in two ways: crater on/self-locking and crater off/non-self-locking with simultaneous operation of the torch switch. 3.7.1 Operating procedures for crater welding 1) Feature description: ... - Page 24 is still maintained for a short time to burn the welding stick. This processing time is called burn-back time, and the setting of this time period varies depending on the welding conditions, output cable lengthening, and resistance of the wire feeding hose. 3.7.2 Operating procedures for crater-free welding 1) Feature description: ...
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Page 25: Welding Current Setting
Wire feeder panel functions 3) Separate type wire feeder front panel Each operation of the front panel is shown in Figure 3-8. Item Part Name Part Function Feeding speed Adjusting feeding speed (current adjustment regulation) Voltage Adjusting the welding voltage level adjustment knob Jog feeding Controlling wire feeding... -
Page 26: Welding Speed Selection
4.9 Welding speed selection The main considerations are welding quality and productivity. Welding speed is too fast, and protection effect is poor, increasing the cooling rate while reducing the toughness of the weld, which is not conducive to weld forming; welding speed is too slow, it is easy to burn through the weld and thicken the weld microstructure. - Page 27 Table I Plate Wire Welding Welding Welding flow Thickness length diameter Current Voltage Speed extension rate (mm) (mm) (mm) (cm/min) (mm) (L/min) 2.5-3 70-80 17-18 50-60 10-15 3-3.5 85-90 18-19 50-60 10-15 3-3.5 1.0,1.2 100-110 18-19.5 50-60 10-15 3-3.5 1.0,1.2 115-125 19.5-20 50-60 10-15...
- Page 28 Table II Plate Wire Welding Welding Welding Gas flow Thickness length diameter Current Voltage Speed extension rate (mm) (mm) (mm) (cm/min) (mm) (L/min) 60-70 16-17 40-45 10-15 80-90 18-19 45-50 10-15 90-100 19-20 45-50 10-15 speed Flat fillet 100-130 10-15 welding 20-21 45-50...
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Page 29: Chapter V Maintenance
Chapter V Maintenance 5.1 Routine maintenance ATTENTION: Routine inspection must be carried out after switching off the power supply of the distribution box and the welder (except for visual inspection that does not require contact with the conductor) to avoid personal injury like electric shock and burn. - Page 30 Table 5-2 Routine Inspection of Cables Item Inspection Requirements Remarks Check whether the safety earth wire falls off, In case of nonconformity, the fastener Earth wire including the working earth wire and the welder shall be supplemented or the earth wire. component replaced.
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Page 31: Regular Inspection
Table 5-4 Routine Inspection Content of Wire Feeder Item Inspection Requirements Remarks Check whether the pressure handle is Handle set to the proper pressure indication Resulting in unstable feeding and arc line Check whether the wire liner mouth Remove the cutting powder and debris and find out and the side of the wire feed roll the cause to eradicate it accumulate cutting powder and debris... - Page 32 Operation Instructions CAUTION All maintenance and repair work must be done with the power completely disconnected. Please make sure the power is unplugged before opening the housing. When the welder is energized, keep your hands, hair and tools away from the live parts inside such as fan in case of personal injury or damaging the welder.
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Page 33: Chapter Vi Troubleshooting
Chapter VI Troubleshooting 6.1 Welder failure and problems in welding procedure Table 6-1 MIG Series Failure and Problems in Welding Procedure Fault Troubleshooting The power indicator light/meter does not light a. Check whether the power network pressure is normal. up; the fan refuses to b. -
Page 34: After-Sales Service
Fault Troubleshooting a. Check whether the heating power voltage is normal. The gas meter does not b. The heater plug is not inserted in place. heat up. c. Check whether the resettable fuse inside the welder is intact. d. The electric heater inside the gas meter is damaged. When the torch switch is pressed down, the a.
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