Jasic MIG 250C, Operator'S Manual

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Page 2: ...information should you require assistance or spare parts Date purchased ________________________________________ From where ________________________________________ Serial number ____________________...

Page 3: ...ct Overview 9 Technical Specifications 10 Description of Controls 11 Installation 14 Operation MMA 16 Operation MIG 17 Operation TIG 18 Guide to MMA Welding 19 MMA Welding Problems 23 Guide to MIG MAG...

Page 4: ...and overheating Never use worn damaged under sized or poorly jointed cables Insulate yourself from work and earth using dry insulating mats or covers big enough to prevent any physical contact Never...

Page 5: ...lty welding helmets Always ensure there are adequate protective screens or barriers to protect others from flash glare and sparks from the welding area Ensure that there are adequate warnings that wel...

Page 6: ...he the welding fume Ensure the welding zone is well ventilated and provision should be made for suitable local fume extraction system to be in place If ventilation is poor wear an approved airfed weld...

Page 7: ...ated by high currents may affect the operation of pacemakers or electronically controlled medical equipment Wearers of vital electronic equipment should consult their physician before beginning any ar...

Page 8: ...y current from the power supply network high power systems affect the quality of power provided by the network Consequently connection restrictions or maximum impedance requirements permitted by the n...

Page 9: ...tures Compact modern design 40Khz inverter The JM 202C and JM 252C are single phase 230V AC machines The JM 352C is a three phase 400V AC input machine MIG MAG and MMA welding functions are available...

Page 10: ...V 11 26 11 29 15 38 Welding current range A MIG 30 200 MMA 10 200 MIG 30 250 MMA 10 220 MIG 50 350 MMA 10 350 No load voltage V 52 52 62 VRD OCV V N A N A 24 Wire feed range m min 1 5 16 1 5 16 1 5 1...

Page 11: ...tage control 8 Standard spool gun selector 9 MIG MMA selector 10 Output terminal 11 Output terminal Front view Jasic MIG 352C 1 Digital ammeter 2 Digital voltmeter 3 Voltage control 4 Wire speed contr...

Page 12: ...llows the correct amount of tension to be applied to the top roller to ensure good feed of the wire through the MIG torch 5 Pressure roll assembly Holds the upper drive roll in place which applies pre...

Page 13: ...voltage 2 Power LED Indicates that power is present to the machine and that the power switch of the machine is turned on 3 Overheating LED Indicates overheating when this LED is on it indicates that t...

Page 14: ...cal parameters shown in the manual The equipment should be connected to the appropriate mains supply by a suitably qualified person Always ensure the equipment has a proper grounding Never connect the...

Page 15: ...ing Press the wire inch button to thread the wire out of the torch through the contact tip You are now ready to start MIG welding Gasless self shielded MIG welding Insert the welding torch into the Eu...

Page 16: ...oved along the work piece at the correct speed the metal core deposits a uniformed layer called the weld bead After connecting the welding leads as detailed you will need to switch the power switch on...

Page 17: ...running Switch the MMA MIG switch to MIG mode ensuring the standard spool gun switch is set to standard Open the gas valve of the cylinder and adjust the gas regulator to obtain the desired flow rate...

Page 18: ...nder Before starting any welding activity ensure that you have suitable eye protection and protective clothing Also take the necessary steps to protect any persons within the area Rotate the power swi...

Page 19: ...oss rather than to or from your body The electrode holder lead should always be clear of any obstruction so that you can move your arm freely along as the electrode burns down Some elders prefer to ha...

Page 20: ...n as the electrode contacts the work piece The welder should always ensure a good connection of the work clamp The nearer the clamp is placed to the welding area the better When the arc is struck the...

Page 21: ...uit quickly lift up about 2 4mm and arc will be ignited This method is difficult to master Scratch technique Drag the electrode and scratch the work piece as if striking a match Scratching the electro...

Page 22: ...rode 1 The electrode feeding to the molten pool along axis 2 The electrode swing right and left 3 The electrode moving in the weld direction The operator can choose the manipulation of electrode based...

Page 23: ...speed Ensure the arc is on the leading edge of the weld puddle Porosity Small holes or cavities on the surface or within the weld material Work piece dirty Electrode is damp Arc length is excessive Re...

Page 24: ...om contamination which also enhances the arc The MIG MAG process can be used to weld a wide variety of materials and is normally used in the horizontal position but can be used in vertical or overhead...

Page 25: ...CO welding Gases such as oxygen and carbon dioxide were added and are active constituents to the inert gas to improve the welding performance Although the MAG process is in common use today it is stil...

Page 26: ...positive This means that the majority of the heat is in the electrode wire Certain special wires may require the polarity to be reversed i e electrode wire negative polarity Always consult the manufac...

Page 27: ...e inductance control can make the arc sound entirely different a similar effect is noted with setting AC frequency on a TIG welder while TIG welding in AC mode Jasic variable inductance control see pa...

Page 28: ...have suitable eye protection and protective clothing Also take the necessary steps to protect any persons within the area After connecting the welding leads as detailed above you will need to switch...

Page 29: ...29 MIG Set Up Guide Please Note This information is intended to act as a guide only MIG WELDING GUIDE...

Page 30: ...ding tip Readjust the upper feed pressure Increase the pressure to eliminate burn back to tip Decrease pressure to eliminate bird nesting Replace torch liner Replace wire Check and replace welding tip...

Page 31: ...rior to welding Irregular weld bead and shape Incorrect voltage wire feed settings If it s convex voltage is too low and if it s concave then voltage is too high Insufficient or excessive heat input W...

Page 32: ...32 JM 202C MIG TORCH SPARE PARTS LIST MIG Welding Torch Air Cooled Model T150 T150 Rating 230A Co2 200A Mixed Gases 60 Duty Cycle EN60974 7 Wire Size 0 8mm to 1 2mm...

Page 33: ...33 JM 252C MIG TORCH SPARE PARTS LIST MIG Welding Torch Air Cooled Model T250 T250 Rating 230A Co2 200A Mixed Gases 60 Duty Cycle EN60974 7 Wire Size 0 8mm to 1 2mm...

Page 34: ...34 JM 352C MIG TORCH SPARE PARTS LIST MIG Welding Torch Air Cooled Model T360 T360 Rating 340A Co2 300A Mixed Gases 60 Duty Cycle EN60974 7 Wire Size 0 8mm to 1 6mm...

Page 35: ...The torch angle is best kept at 15 20 from vertical away from the direction of travel This assists with visibility of the weld area and allows easier access for the filler material The filler metal s...

Page 36: ...isibility of the arc A much larger diameter nozzle can be used which will produce a large blanket of shielding gas This can be very useful in welding material like titanium The gas lens will also enab...

Page 37: ...ode Colour Chart DC Tungsten Electrode Current Ranges Tungsten electrode preparation DC When welding at low current the electrode can be ground to a point At higher current a small flat on the end of...

Page 38: ...pure helium maybe used TIG welding arc starting Lift TIG lift arc Not to be confused with scratch start this arc starting method allows the tungsten to be in direct contact with the work piece first b...

Page 39: ...de of use No operation when torch switch is operated Torch switch or cable faulty Check the torch switch continuity and repair or replace as required ON OFF switch turned off Check position of ON OFF...

Page 40: ...d too small or insufficient penetration Welding travel speed too fast Reduce your welding travel speed Weld bead too wide or excessive bead build up Welding travel speed too slow Increase your welding...

Page 41: ...t 5 minutes after power switch off before opening the case SERVICE SCHEDULE RECORD Period Maintenance item Daily examination Check the condition of the machine mains cables welding cables and connecti...

Page 42: ...fter the welding machine is cooled Check incoming mains supply to ensure it is within 230V 15 or 400 15 depending on model Wire feed motor does not rotate when the Wire feed speed may be set to zero M...

Page 43: ...the restricted substances as listed in EU Directive 2011 65 EU and the UK directive ROHS Regulations 2012 in concentrations above the limits as specified therein UKCA Declaration of Conformity The ma...

Page 44: ...44 EC Declaration of Conformity...

Page 45: ...ural wear and tear Failure to observe the operating and maintenance instructions Connection to an incorrect or faulty mains supply Overloading during use Any modifications that are made to the product...

Page 46: ...46 SCHEMATIC Wiring diagram for the JM 202C JM 252C...

Page 47: ...47 SCHEMATIC Wiring diagram for the JM 352C...

Page 48: ...ening Welding Helmet SSARG2G Single Stage 2 Gauge Argon Regulator WTLHK2 2m Gas Hose and Quick Gas Connecter TSP 250 6 Titanium 250 Spool on Gun 6mtr Euro 9 Pin Plug Model Feed Roll Part Number Descri...

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Page 50: ...50 January 2023 Issue 10...