Sweiss SKYARC 2750 Operator'S Manual Download

Page: 25 / 29

SWEISS

WELD.COM

info@sweissweld.com

MAINTENANCE & TROUBLESHOOTING

S/N

Troubles

Reasons

Solution

The minimum & maximum on

the current display disaccord
with the setting current

The minimum current is not accordant

(Please refer to 3.1)

Adjust the potentiometer RT1on the

PCB

The maximum current is not accordant

(Please refer to 3.1)

Adjust the potentiometer RT1 on the

current meter

No no-load voltage output

The machine is damaged

Check the main circuit and the PCBs

The no-load voltage display

disaccords with actual value

The zero of voltage meter is wrong

Adjust the potentiometer W6 (RT1)

on the voltage meter

No current output in the

welding

Welding cable is not connected with the

two output of the welder.

Connect the welding cable to the

welder’s output

Welding cable is broken

Wrap, repair or change the welding

cable

Earth cable is not connected or loosen

Check the earth clamp

Not easy to start arc in the

welding, or easy to cause
sticking

The plug loosen or connect not well

Check and tighten the plug

Oil or dust covered the workpiece

Check and clear out

MMA/TIG welding selection is wrong

Selecting the MMA welding

The arc is not stable in the

welding process

The welding current adjusted too low

Increase the welding current

The arc is too long in the welding

Use the short arc operation

The welding current can not be

adjusted

The welding current potentiometer in the

front panel connection not so good or

damaged

Repair or change the potentiometer

The minimum & maximum on

the current display disaccord

with the actual current

The minimum current is not accordant

(Please refer to 3.1)

Adjust the potentiometer W6 on the

PCB

The maximum current is not accordant

(Please refer to 3.1)

Adjust the potentiometer W1 on the

PCB

The penetration of molten pool

is not enough

The welding current adjusted too low

Increase the welding current

The arc is too long in the welding

Use the short arc operation

The arc force adjusted too small

Increase the arc force

Arc blow

Airflow disturbance

Use the shelter from airflow

The electrode eccentricity

Adjust the electrode angle

Change the electrode

Magnetic effect

Incline the electrode to the opposite

way of the magnetic blow
Change the position of earth clamp or

add earth cable in the two side of
workpiece

Use the short arc operation

The alarm light is on

Over

heat

protection

Over welding current

Induce the welding current output

Summary of Contents for SKYARC 2750

Page 1: ... Manual Completely before attempting to use this equipment Save this manual and keep it handy for quick reference Pay particular attention to the safety instructions we have provided for your protection Contact your distributor if you do not fully understand this manual OPERATORS MANUAL SKYARC 2750 ...

Page 2: ...ITY CONNECTION WAY 10 3 5 CONNECTION TO THE MAINS SUPPLY 10 4 OPERATION CONTROLAND CONNECTORS 12 4 1 LAYOUT FOR FRONT REAR PANEL 12 4 2WELDING CURRENTADJUSTMENT 12 4 3ARC FORCE ADJUSTMENT 12 4 4 HOT STARTADJUSTMENT 14 4 5WELDING OPERATION 14 4 5 1 Striking arc way 14 4 5 2 Manipulation of electrode 15 4 6WELDING PARAMETERS 15 4 6 1 Joint form in MMA 15 4 6 2 Electrode selection 16 4 7ARC WELDING D...

Page 3: ...nt according to 5 because of the DC voltage existing in the electrolytic capacitors ELECTRIC SHOCK CAN KILL Never touch electrical parts Wear dry hole free gloves and clothes to insulate yourself Insulate yourself from work and ground using dry insulation Make certain the insulation is large enough to cover your full area of physical contact with work and ground Take carefully when using the equip...

Page 4: ...umes keep exposure as low as possible and below Threshold Limit Values using local exhaust or mechanical ventilation In confined spaces or in some circumstances outdoors a respirator may be required Additional precautions are also required when welding on galvanized steel Do not weld in locations near chlorinated hydrocarbon vapors coming from degreasing cleaning or spraying operations The heat an...

Page 5: ...re extinguisher readily available Where compressed gases are to be used at the job site special precautions should be used to prevent hazardous situation When not welding make certain no part of the electrode circuit is touching the work or ground Accidental contact can cause overheating and create a fire hazard Do not heat cut or weld tanks drums or containers until the proper steps have been tak...

Page 6: ...on caps should always be in place and hand tight except when the cylinder is in use or connected for use 1 3 The knowledge of Electric and Magnetic Fields Electric current flowing through any conductor causes localized Electric and Magnetic Fields EMF The discuss on the effect of EMF is ongoing all the world Up to now no material evidences show that EMF may have effects on health However the resea...

Page 7: ...er heat etc inside the welders when the problems listed before occurred the alarm on the front panel is light and at the same time the output current will be cut off It can self protect and prolong the using life and greatly improved the reliability and practicability of the welders For SKYARC serires discrete welding current arc force and hot start can be adjusted by the adjustment knob which can...

Page 8: ...parameter can be adjusted continuously and steplessly to meet with the requirements of welding craft Note Please refer to the nameplate about the right power supply connection three phase 220v or three phase 380v Wrong power connection may cause machine failure Rectify Inverter Medium frequency transformer Medium frequency rectify Hall device Current positive feedback control Three phase AC DC AC ...

Page 9: ...SWEISSWELD COM info sweissweld com SUMMARY 2 ...

Page 10: ...Power factor 0 95 0 93 Welding current range A 10 275 Max no load voltage V 50 Efficiency 91 85 Duty cycle 40 10mins 275A 50 200A 60 160A 100 Protection class IP23 Insulation class F Dimensions of Machine L W H mm 410 170 270 Weight Kg 11 5 Note 1 The above parameters are subject to change with the improvement of machines 2 You need to wait for five seconds to turn on the machine after you turn of...

Page 11: ...ower KW 8 7 8 8 Rated input current A 13 5 24 4 Rated input apparent power KVA 9 7 9 3 Welding current adjust range A 10 275 Duty Cycle 40 10min 50 275A 50 275A 60 190A 60 200A 100 150 A 100 175A No load voltage V 50V adjustment Power factor 0 9 Efficiency η 80 Machine figure size length width height 400 170 270 Protection class IP23 Insulation class F Weight kg 10 5 cooling AF ...

Page 12: ...l At this time the machine should be relaxed for 15 minutes to cool the fan When operating the machine again the welding output current or the duty cycle should be reduced Take SKYARC as an example 3 3 Movement and Placement Take SKYARC 2750 as an example For SKYARC serires discrete arc welding machine the handles are installed at the top of machine to move it The machine needs immobile equipment ...

Page 13: ...tage there are over voltage and under voltage protection inside the welder the alarm light will on at the same time the current output will be cut off If the power supply voltage continually goes beyond the safe work voltage range it will shorten the welder life span The below measures can be used Change the power supply input net Such as connect the welder with the stable Live wire Earth wire 3 3...

Page 14: ...ributor Induce the machines using power supply in the same time Set the voltage stabilization device in the front of power cable input Note Please refer to the nameplate about the right power supply connection three phase 220v or three phase 380v Wrong power connection may cause machine failure ...

Page 15: ...nnected to the mains supply 7 Alarm pilot lamp This pilot lamp indicates when lit that the protection of the machine has been 8 Welding current Set welding current refer to 4 2 9 MMA TIG selection 10 Main switch 11 Mains cable 12 Cooling fan 4 3 Arc force adjustment Refer to 2 4 section of volt ampere characteristic graph under 20V graph part when the SKYARC 2750 load voltage is under 20V there is...

Page 16: ...e Easy to striking arc Increase spatter Good root meltability In welding thin plate increase the dangers of penetration Welding position Flat welding for flat plate butt joint Vertical welding for flat plate butt joint Horizontal fix welding for pipe butt joint Vertical fix welding for pipe butt joint Workpiece thickness mm 8 12 8 12 Ф114 7 Ф114 7 Continuous welding Gap mm 2 5 3 2 2 5 3 2 2 5 3 2 ...

Page 17: ...ble in the striking arc only The interval time for hot start is 3 sec 4 5 Welding operation 4 5 1 Striking arc way Knocking arc take the electrode upright to touch the workpiece after forming short circuit quickly lift up about 2 4 mm and arc will be ignited This method is difficult to master But in the welding for the brittle or hard steel it is better to use knocking way electrode workpiece elec...

Page 18: ... the molten pool along axes the electrode swing right and left the electrode moving along welding way The operator can choose the manipulation of electrode based on welding joint sharp welding position electrode spec welding current and operation skill etc The details please refer to Welding Dictionary P69 Volume 1 of Edition 2 4 6 Welding parameters 4 6 1 Joint form in MMA In MMA welding the comm...

Page 19: ...n electrode Electrode diameter mm 1 6 2 2 5 3 2 4 6 Factor K 20 25 25 30 30 40 40 50 Notice the above parameters originate from Welding Dictionary P66 P67 Volume 1 of Edition 2 Electrode should be drying according to user manual before using For reducing the hydrogen of the molten pool and welding seam and avoiding the blowhole and cold crack In the welding process the arc must not be too long oth...

Page 20: ... for a short time or round to manipulate electrode after the molten pool is filled in by metal take to the side for crater Blowhole There are some dust like oil rust or water on the work piece surface and groove The coating of electrode is damped is not drying Under current or over speed in the welding The arc is too long or lean burning the molten pool protection is not good Over current the coat...

Page 21: ...ding parameters Operation seriously Enhance the clearness of layers Reheat crack When the corona strain at grain boundary is unable to support the strain that engendered in the process of stress relaxation hot crack was caused again Adopt low intensity electrode Reduce the residual stress and stress concentration Control the heat input and adopt appropriate temperature of heat treatment Avoid the ...

Page 22: ...ize energy sources When power switch shuts off protectively because of failure Don t restart it until problem is resolved Otherwise the range of problem will be extended Note Please refer to the nameplate about the right power supply connection three phase 220v or three phase 380v Wrong power connection may cause machine failure ...

Page 23: ...it is damaged it should be wrapped up insulated or changed Monthly Using the dry compressed air to clear the inside of arc welding 5 Maintenance Troubleshooting 5 1 Maintenance In order to guarantee that arc welding machine works high efficiently and in safety it must be maintained regularly Let customers understand the maintenance methods and means of arc welding machine more enable customers to ...

Page 24: ...must be operated carefully If any wire becomes flexible or is misplaced it maybe potential danger to user Only professional maintenance personal who is authorized by us could overhaul the machine Guarantee to shut off the arc welding machine s power before turn on the outline of the equipment If there is any problem and has no the authorized professional maintenance personal of our company please ...

Page 25: ...ong Selecting the MMA welding 9 The arc is not stable in the welding process The welding current adjusted too low Increase the welding current The arc is too long in the welding Use the short arc operation 10 The welding current can not be adjusted The welding current potentiometer in the front panel connection not so good or damaged Repair or change the potentiometer 11 The minimum maximum on the...

Page 26: ...oltage Power supply fluctuated Using the stable power supply Under voltage protection Power supply fluctuated Using the stable power supply Too many machines using power supply in the same time Induce the machines using power supply in the same time Over current protection unusually current in the main circuit Test and repair the main circuit and drive PCB Pr2 ...

Page 27: ...SWEISSWELD COM info sweissweld com MAINTENANCE TROUBLESHOOTING 5 3 Electrical principle drawing SKYARC 2750 24 ...

Page 28: ...SWEISSWELD COM info sweissweld com MAINTENANCE TROUBLESHOOTING 25 SKYARC 2750 ...

Page 29: ...SWEISSWELD COM info sweissweld com ...

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