P I T PMIG145-C Automatic Welding Machine User Manual

P I T PMIG145-C Automatic Welding Machine User Manual

GENERAL SAFETY PRECAUTIONS

INTENDED USE AND OPERATION PRINCIPLE

– This welding machine can perform MIG (inert-gas arc welding), MMA ( covered- electrode welding) and gas-free welding with self-protection (flux-cored or powder electrode wire)
– Power supply source IGBT (insulated gate bipolar transistor) with a unique control mode improves the reliability of the welding machine.
– Compliance with the operational cycle ensures welding for a long time.
– Control with closed-loop feedback, DC output, can operate under voltage fluctuations-15%.
– Adjustable voltage and arc welding current excellent welding characteristics.
– Unique control scheme for the dynamic characteristics for the welding in MIG mode, stable arc, little sputtering, beautiful weld bead, high welding efficiency.
– Removal of the final ball after welding, high no-load voltage, adjustable wire feed, high speed sequential arc ignition.
– Stable arc welding current in MMA mode, excellent arc ignition, the use of different electrodes.
– High purity inverter significantly reduces the volume and weight of the welding machine.
– Great reduction in magnetic and resistance loss obviously enhances the welding give the effect of energy economy.

DECRYPTING THE DATE OF PRODUCTION OF THE PRODUCT

Date of manufacture of the product is encrypted in the serial number printed on the tool body. The first 2 digits indicate the year of manufacture, the next 2 digits – month and the following two digits – day.

BLOCK SCHEME

PANEL DESCRIPTION

1. Indicator: MMA mode enabled
2. 2T/4T mode selection button
3. Indicator: 2T mode enabled
4. Indicator: 4T mode enabled
5. Indicator: gas supply
6. Button check the gas passing
7. Indicator: no process wire run
8. OnProcess wire run button
9. Overload indicator.
10. Indicator of overheating.
11. Indicator: VRD mode enabled
12. VRD mode on button
13. Indicator: gas blocked.
14. Indicator: slide the wire out when the 4T
15. Gas/wire feed mode on button
16. The mode switch button wire/gas
17. Indicator: gas supply
18. Parameter value selection knob
19. Digital display: shows amps, speed, and time delay
20. Indicator: indication of the digital indicator of arc welding current
21. Indicator: indication of the digital indicator of the wire feed speed
22. Indicator: digital display indication time delay
23. Digital indicator: voltmeter
24. Indicator: indication of the digital indicator-voltage
25. MMA/ MIG-MAG welding mode selection button
26. Indicator: MIG-MAG welding mode
27. Parameter value selection knob

INSTALLATION AND OPERATION

Connecting the in cable

1. Check with the Multimeter power supply, whether the voltage is within acceptable limits.
2. This welding machine has a power cable. Connect the power cable to the rated input power source. (For safety reasons, grounding is required.)
3. The cable must be firmly plugged into a socket.

MMA adjustment

1. This welding machine has two high-speed plugs. Insert the quick-release plugs into the quick-release sockets on the front of the machine and tighten them to ensure good contact. Otherwise, plugs and sockets will burn when working long and high working current.
2. Insert the cable plug with the electrode arm into the + socket on the front of the machine and tighten clockwise. Insert the cable plug with the workpiece clip into the – socket on the front of the machine and tighten clockwise.
3. Usually in MMA mode, DCEP (positive DC electrode) and DCEN (negative DC electrode) connections are used. DCEP: connect the clip of the electrode to the output connector+ and the workpiece clip to the output connector. DCEN: connect the electrode clip to the output connector – and the workpiece clip to the output connector. Operators can choose the connection mode depending on the workpiece and electrode application requirements. If you select the wrong connection mode will occur phenomena such as unstable arc, excessive spray, electrode adhesion. To resolve the problem, change the connection by swapping the high-speed plugs.
4. When operating, if power is supplied through an extension cord, choose a large-section extension cable to reduce voltage drop.

Mode of operation

1. After installing according to the above method and turning on the air supply power on the rear panel, the unit starts, the power led lights up and the fan is running.
2. Switch the MMNMIG switch to the MMA position and adjust the arc welding current with the current control knob according to the workpiece thickness.
3. In general, depending on the diameter of the electrode, the arc welding current should be as follows. 2.5:55-80 A; 3.2:70-120 A; 4.0:130-160 A; 5.0:180-210A.

MIG adjustment

1. Check with the Multimeter power supply, whether the voltage is within acceptable limits.

2. Connect the welding blow-pipe to the adapter connector on the front panel of the semiautomatic welding machine. Insert the cable plug with the workpiece clip into the socket – on the front panel of the machine and tighten it clockwise.

3. Flip the cover of the semiautomatic welding machine. Install the wire reel on the reel table. Turn the reel by hand.
   To prevent unwinding of the wire, it should be turned with little effort.

4. Release the hold-down roller clip on the feeder. Insert the wire through the feeder receiver tube into the spiral guide of the adapter. Make sure that the wire gets into the groove of the driving roller, fix it with a hold-down roller. The driving roller has two grooves: 0.8 mm and 1.0 mm. Check that the groove size matches the diameter of the wire used.

5. Remove the nozzle from the blow-pipe, unscrew the copper current collector tip.

6. Connect the plug of the semiautomatic welding machine power cord to 220V I 50Hz. If the socket is without a grounding pin, ground the semiautomatic welding machine case with a separate cable to the grounding pin on the back of the machine. Then turn the switch on at the rear panel to the on position.

7. By briefly pressing the “MODE SELECTION” button switch, set the semiautomatic welding machine to the desired “2T” or “4T” mode (only the corresponding led will be lit).

8. Connect the wire feeder with the gas hose to the gas bottle feed regulator.

Arc welding current setting
Set the arc welding current after the above preparations. Short-time short- circuit is mainly suitable for wire with a diameter of 1.0-1.6 mm, and this phenomenon occurs in the conditions of Lite-gage electrodes, low voltage and low current. At this time, it is possible to ensure stable welding, small sputtering and beautiful weld bead. Set the arc welding current according to the picture below. For different operating conditions, see the welding parameters table section of this manual.

Short-time short-circuit current

Welding speed selection
When selecting the welding speed, the quality and performance of the welding should be taken into account. With the increase of speed of welding weakens the protection effect and accelerates the cooling. As a result, this does not contribute to the formation of the weld bead. If the speed is too low, the workpiece will be burnt, and a beautiful weld bead cannot be obtained. In practical work, the welding speed should not exceed 50 cm/min.

CTWD selection
Increasing the CTWD can improve performance, but too much overhang can lead to excessive sputtering, wire breakage, and unstable welding. In general, the CTWD should be 10 times the wire diameter.

Shielding gas flow rate selection
The main factor in the protective effect. In addition, the shielding effect when welding inner comers is better than when welding outer comers, so the gas flow rate when welding inner comers should be less in FCAW mode (flux cored welding) requires less shielding gas, or it is not required at all. See figure below to select a specific gas flow rate.

Gas flowrate selection

SAFETY PRECAUTIONS

Operating environment

1. Welding must be carried out in a dry environment at a humidity of 90% or less.
2. The temperature of the operating environment should be between -10°C and 40°C.
3. Avoid outdoor welding, if there is no protection from sunlight and rain. Welding all the time should be dry, do not put it on the wet ground or in puddles.
4. A void welding in dusty places or places with corrosive chemical gas.
5. Welding in a protective environment should be carried out in places where there is no strong air movement.

Ventilation
This machine can create a powerful arc welding current with strict cooling requirements that cannot be provided by natural ventilation. Therefore, the built-in fan is very important to enable the machine to operate stably with efficient cooling. The operator must ensure that the cooling air baffles are open and not blocked. Minimum distance between machine and surrounding objects should be 30 cm. Good ventilation is critical for normal operation and service life
of the machine.

Over-voltage is forbidden
For the supply voltage range of the machine, refer to the Product specifications table. This machine has automatic voltage compensation, which allows you to maintain the voltage within the specified range. If the input voltage exceeds the specified value, it can damage the components of the machine.

Overloading is forbidden
Remember to observe the maximum load current at all times (see the corresponding operating cycle). Ensure that the arc welding current does not exceed the maximum load current. Overloading is sure to shorten the machine service life, or even damage it.

Overheating protection
An abrupt halt can occur when the front panel overheating led is lit and the machine is in an overload condition. Under these circumstances, the machine does not need to be restarted. Continue operation of the built-in fan to reduce the temperature inside the machine. Welding can be continued when the internal temperature drops to the standard range and the overheating led goes out.

MAINTENANCE

1. Check periodically whether the internal scheme connection is in good condition (especially the plugs). Tighten loose connections. If corrosion is present, remove it with abrasive paper and then reconnect.
2. Keep your hands, hair and tools away from moving parts such as the fan to avoid injury or damage to the machine.
3. Periodically remove dust with dry and clean compressed air. If the operating environment contains a lot of smoke and dirt, the machine should be cleaned daily. The compressed air pressure must be at the appropriate level to avoid damage to small parts inside the machine.
4. Avoid getting rain, water and vapours inside the machine. If they get inside the machine, dry it and check the machine insulation (including the points between the connections and between the connection and the case). The machine can be used only in the absence of abnormal phenomena.
5. Check periodically whether the insulation of all cables is in good condition. In case of any wear, repair or replace.
6. Check periodically whether the gas hoses is in good condition. Replace it in the presence of any cracks.
7. If the machine is not used for a long time, store it in a dry place in the original packaging.

Troubleshooting

WELDING PARAMETERS TABLE (FOR REFERENCE ONLY)

Parameters of butt welding with gap ( type I)
Arc welding current and voltage directly affect to the welding stability, its quality and performance. In order to obtain a good welding performance, it is necessary to optimally set the arc welding current and voltage. In general, according to the electrode diameter, the metal transfers mode and production requirements. Set the arc welding current and voltage according to the following tables.

Parameters of the normal fillet weld

Parameters of the fillet weld in the vertical position

Parameters of the overlap welding

MAG options
Material: carbon steel
Gas: gas mixture of Ar+C02

We continue to improve this welding machine, so some of its parts can be changed to achieve better quality, but its main functions and operations will not change. We will be very grateful for your understanding.

TERMS OF WARRANTY SERVICE

1. This Warranty Certificate is the only document that confirms your right to free warranty service. Without presenting this certificate, no claims are accepted. In case of loss or damage, the warranty certificate is not restored.

2. The warranty period for the power tool is 12 months from the date of sale, during the warranty period the service department eliminates manufacturing defects and replaces parts that have failed due to the fault of the manufacturer free of charge. In the warranty repair, an equivalent operable product is not provided. Replaceable parts become property of service providers.
   P .I. T is not liable for any damage that may be caused by operation of the electric machine.

3. Only clean tool accompanied with the following duly executed documents: this Warranty Certificate, Warranty Card, with all fields filled out, bearing the stamp of the trade organization and the signature of the buyer, shall be accepted for warranty repair.

4. Warranty repair is not performed in the following cases:
   – in the absence of a Warranty Certificate and a Warranty Card or their incorrect execution;
   – with failure of both a rotor and a stator of the electric engine, charring or melting of primary winding of the welding machine transformer, charging or starting-charging device, with internal parts melting, bum down of electronic circuit boards;
   – if a Warranty Certificate or a Warranty Card does not correspond to this electric machine or to the form established by the supplier;
   – upon expiration of the warranty period;
   – at attempts of opening or repair of the electric machine outside the warranty workshop; making constructive changes and lubrication of the tool during the warranty period, as evidenced, for example, by the creases on the spline parts of the fasteners of non-rotational parts.
   – when using electric tools for production or other purposes connected with making a profit, as well as in case of malfunctions related to instability of the power network parameters exceeding the norms established by GOS T;
   – in the events of improper operation (use the electric machine for other than intended purposes, attachments to the
   electric machine of attachments, accessories, etc. not provided by the manufacturer);
   – with mechanical damage to the case, power cord and in case of damages caused by aggressive agents and high and
   low temperatures, ingress of foreign objects in the ventilation grids of the electric machine, as well as in case of damage resulting from improper storage ( corrosion of metal parts);
   – natural wear and tear on the parts of the electric machine, as a result of long-term operation ( determined on the basis of the signs of full or partial depletion of the specified mean life, great contamination, presence of rust outside and inside the electric machine, waste lubricant in the gearbox);
   – use of the tool the purposes for other than specified in the operating instructions.
   – mechanical damages to the tool;
   – in the event of damages due to non-observance of the operating conditions specified in the instruction (see chapter “Safety Precautions” of the Manual).
   – damage to the product due to non-observance of the rules of storage and transportation.
   Preventive maintenance of electric machines (cleaning, washing, and lubrication, replacement of anthers, piston and sealing rings) during the warranty period is a paid service.
   The service life of the product is determined by the manufacturer and is 2 years from the date of manufacture.
   The owner is notified of any possible violations of the above terms of warranty service upon completion of diagnostics in the service center.
   The owner of the tool entrusts the diagnostic procedure to be conducted in the service center in his absence. Do not operate the electric machine when there are signs of excessive heat, sparking, or noise in the gearbox. To determine the cause of the malfunction, the buyer should contact the warranty service center. Malfunctions caused by late replacement of carbon brushes of the engine are eliminated at the expense of the buyer.

5. The warranty does not cover:
   – replacement of parts (accessories and furniture), for example: accumulators, disks, knives, drills, bores, cartridges, chains, sprockets, collet clamps, buses, tensioning elements and fasteners, trim tabs, pads of grinders and tape machines, etc.
   – quick-wear parts, for example: carbon brushes, drive belts, glands, protective covers, guide rollers, guides/rails, rubber seals, bearings, timing belts and wheels, shafts, brake band, ratchet wheels and starter cables, piston rings, etc. Replacing them during the warranty period is a paid service.
   – power cords, in case of insulation damage, power cords are subject to mandatory replacement without the consent of the owner (paid service),
   – casing of machine.

P.I.T. WARRANTY CERTIFICATE

Product Name ———-
Product Number □□□□□□□□□□□
Serial Number □□□□□□□□□□□□□ Place of Seal
Sale Date ___ _
Trade Organization Name ___ _

Dear customer!
Thank you for purchasing the P.I.T tool, and we hope that you will be satisfied with your choice. In the process of manufacturing the P .I. T tools pass multilevel quality control, if nevertheless your product will need maintenance, please contact the authorized P.I. T service centres.

Attention!
When buying, ask a seller to check the completeness and operability of the tool, to fill out the Warranty Certificate, the Warranty Card (the boxes shall be filled out by a seller) and to affix the seal of the trade organization in the Guarantee Certificate and the Warranty Card.

Warranty
By this Warranty Certificate, P.I.T. company guarantees the absence of defects of the production nature, both in the product itself and in its constituent components.
In the event any of the above defects are detected during the warranty period, the specialized P.I.T. service centres shall repair the product and replace the defective spare parts free of charge.
The warranty period for P.I. T. electric machines is 12 months from the date of sale.

“The warranty maintenance terms acknowledged and accepted. The operability and completeness of the product are checked in my presence. No claims on quality and appearance.”

Buyer’s Signature __
Surname (legibly) ___
Phone ____ _

http://www.pit-tools.com

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