MiTEC super200 User manual

SUPER Series · User’s Manual
PLEASE READ FIRST
Thank you for purchasing Mitech equipment!
For your safety, please read this user's manual before installation and
operation.
Thanks for your support!
MITEC WELDING EQUIPMENT (SHENZHEN) CO., LTD.
ADD: Mitech Industry Zone, Lianrun Road, Dalang Street, Bao’an District,
Shenzhen, Guangdong, China
TEL: [phone]
FAX: [phone]
EMAIL: [email protected]m
WEBSITE: www.mitech.cc
SUPER Series · User’s Manual
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REPAIR AND MAINTENANCE
Repair and maintenance should be done by professional person and please make
sure the power supply is cut off before any operation. When you meet any insoluble
problem please contact us.
Repair and maintenance
1. Check internal and external circuit of welding machine regularly and make sure the
connection is correct and tight.
2. Avoid water or steam infiltrate into the internal machine. If it occurs please dry the
machine then check before welding.
3. If the welder will not be used for a long time, please pack it and store in the dry air.
Common fault and elimination method
Fault Elimination method
Switch on but no response
1. Check if the power supply voltage is wrong
2. Check if the power switch has a breakdown
3. Check if the assistant power circuit is working
4. Check if there is any loose wire
Sounds of HF arc-striking;
No output current
1. Check if the torch and earth clamp cable are in open
circuit
2. Check if the earth clamp connects to work-piece
Output current unadjustable
1. Check if the adjustment potentiometer is working
2.Check if the control module is working
3. Check if the current can be adjusted by foot pedal
Manual adjusting normal, but
with foot pedal abnormal
1. Check if the micro switch inside the foot pedal is
working
2. Check if the linear sliding potentiometer inside the
foot pedal is working
OC led on 1. Check if the protective circuit is working
2. Check if the top board circuit is working
Unable to break the oxidation
film
1. Check if the AC/DC selection switches to AC
2. Increase the pulse width or clean the oxidation film
on the work-piece
No enough power for welding
or cutting;
Arc-striking easy to pause
1. Check if the voltage is too low
2. Check if the air pressure is too high or too low
3. Check if the tip and electrode are not well cooperated
4. Check if the rod is good or not and if it’s dry enough

SUPER Series · User’s Manual
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INTRODUCTION
The machine is supplied with AC 220V input. It’s using advanced inverter
technology to transfer 50/60HZ power frequency electric to above 100KHZ high
frequency electric through the inverter combined with powerful components such as
MOSFET and so on. Then after voltage reducing- rectifying-wave filtering it also adopts
pulse-width modulation (PWM) and closed-loop back circuit control technology to
output stable DC current. Thus this unit has the following characteristics: high efficiency,
low energy consumption, compact, good dynamic characteristics, stable arc,
continuous adjustable current and so on. Also it’s with protection function for
overvoltage, over current and overheat to ensure the safety and durability of the welder.
The welder is of constant current characteristics, and welding current is
stable and doesn't change with the arc. And in cutting process, the temperature
can reach 10000-15000

after the arc is compressed by high-speed flowing air, then
the machine enters into high ionization state and gets powerful plasma arc.
The unit is with foot pedal conncetor which is for remote current control
and more convenient for operation. And it's widely used in aluminum, carbon
steel, stainless steel, cooper and titanium welding, etc.
Welcome to purchasing our product and giving us more valuable advice. And we
will be committed to perfect products and services to create the top brand among the
welding industry.
1.
Creepage-protecting switch should be used when you operate the machine!
2.
Within indoor environment the machine may produce radio wave, so the user
should make full of preventive measures.
3.
Please make sure the power supply is cut off before any connecting operation.
4.
If distance between work-piece and machine is too far (

50m), and welding
cables are too long, please select the cable with bigger section to reduce the
voltage dropping.
SUPER Series · User’s Manual
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SOLUTION TO FAULT
Below phenomenon is related to fittings, welding materials, environment factor,
supply powers, please try to improve the welding environment.
1. Current is unstable during welding process and it may be caused
by the followings
1.1 Electric network voltage changes.
1.2 Harmful interferences from electric network or other equipments.
1.3 Undersize of external input cable.
2. Output current not up to rated value
Current will not match the setting value when power voltage departs from the rated
value. While voltage is lower than the rated value, the max output may be lower than
the rated value.
3. Arc-striking difficult and easily pauses under MMA or TIG
3.1 Make sure the rod or tungsten is of good quality otherwise it is difficult to meet the
request of the high quality welding.
3.2 It will be hard to strike arc if the rod is not dry enough or the tungsten is not
sharpened. It will also cause unstable arc and the welding quality will be
influenced by increased defect.
4. Too much spatter under MMA welding
4.1 High current with rod of small diameter.
4.2 The output terminal polarity is reversed. For normal use you can adopt positive
connection which means the holder connects to “-” polarity and work-piece to the
“+” polarity, so please exchange.
5. Unsmooth cutting appearance and unsatisfactory cutting effect
5.1 Make sure the compressed air source is stable and with enough pressure.
Normally the air pressure should be not less than 0.3Mpa (around 3Kgf/cm²), and
the range of fluctuation should be under ±0.05Mpa.
5.2 The electrode and tip diameter do not match the cutting current very well.
Tip standard
Current range 10

30A 30

40A 60

100A
Tip diameter 1.0mm 1.2mm 1.3mm

SUPER Series · User’s Manual
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MAIN PARAMETER
Model
Parameter
          
Input power voltage (V)
   
 
    


Input voltage frequency (HZ)
 
 
  


Rated input current (A)
       
Rated input power capacity (KVA)
     
Output current range (A)
     

         

    
No-load voltage (V)


  

  
Rated output voltage (V)
 

    

  
Pre-flow time (S)
     
Clear width (%)
         
Down-slope time (S)
     
Pulse width (%)

    
Pulse current range (A)

     
Pulse frequency range (HZ)



 
Post-gas time (S)


  

 
Arc-striking HF HF
Efficiency (%)
   
Duty cycle (%)
   
Power factor
     
Insulation class
 
Protection class
         
Weight (KG)
   
Dimension (mm)
     

        

  
SUPER Series · User’s Manual
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INSTALLMENT & OPERATION
The rated current and the diameter of the output cable
(max. temperature of conductor 60)
Rated current of the max. duty cycle (A)
Rated section of
copper conductor
(mm
2
) 100% 85% 60% 30% 20%
16 105 115 135 190 235
25 135 145 175 245 300
35 170 185 220 310 380
50 220 240 285 400 490
70 270 195 350 495 600
95 330 360 425 600 740
120 380 410 490 690 850
185 500 540 650 910 1120
The section and the length of the welding cable
Section (mm
2)
Rated
current (L/A)
L=20m
L=30m
L=40m
L=50m
L=60m
L=70m
L=80m
L=90m
L=100m
100 25 25 25 25 25 25 25 28 35
150 35 35 35 35 50 50 60 70 70
200 35 35 35 50 60 70 70 70 70
300 35 50 60 60 70 70 70 85 85
400 35 50 60 70 85 85 85 95 95
500 50 60 70 85 95 95 95 120
120
600 60 70 85 85 95 95 95 120
120

SUPER Series · User’s Manual
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PANEL DESCRIPTION
Usage Description

1. Click the power switch to “ON” position for starting the machine.
2. The OC led will be on if there is any failure.
3. Input power voltage is AC220V.
4. There is a ground screw in the left corner of the rear panel with symbol . The
ground cable needs to be connected with the ground screw before using.
5. Please make sure the power supply is cut off before any connecting operation and
turn on the switch after confirming it’s well installed.
Adjustment knob:
1. Pre-flow time: the time of argon flowing out before welding current
2. Current: to adjust the welding current according to the welding requirement.
3. Clear width: welding current direction change alternately .Please note that when the
current is above 200A, you’d better select the clean width below 30%.
And the clean width above 50% should be selected if the current is
below 100A.
4. Down-slope time: to get nice welding spot during arc-extinction, the current should be
turned off gradually until it stops.
5. Post-gas time: to keep the argon gas flowing for some time after arc-extinction in
order to avoid the welding spot getting oxidized.
6. Pulse frequency: to adjust the pulse frequency with PULSE function on.
7. Pulse width: to adjust the pulse width with PULSE function on.
8. Peak current: to work with current adjustment with PULSE function on.
SUPER Series · User’s Manual
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INSTALLMENT & OPERATION
For CUT
1. Connect the compressed air source with IN terminal of gas regulator by gas hose,
and the OUT terminal with copper connection on rear panel of the machine, then
fasten the connector with hose clamp to prevent from gas leaking, at the same time
please make sure enough dry flowing gas with suitable pressure is supplied. The
installation of gas regulator is as below:
1.1 Fasten the air tip with tape to IN and OUT terminal of the gas regulator.
1.2 Fasten the head of the gas regulator with tape .
1.3 Fix the connecting frame to the gas regulator installation site on the rear panel
with screw, unscrew the rubber nut and fix the regulator to the frame. The
regulator also can be fixed on other link span, but vertical installation should be
done.
1.4 Open the gas valve and adjust to adequate air pressure and flow.
Remark: “+” means up air pressure and “-” means down air pressure.
1.5 When too much water gathered in the filter cylinder, drain off the water.
2. Correctly connect the torch and earth clamp according to the sketch.
2.1 The connector of gas-electricity integration to the front panel and fasten it
clockwise.
2.2 The pin connector to the front panel and fasten it clockwise.
2.3 The cable connector of the earth clamp to the positive terminal “+”.
3. Switch to “CUT” and Click the power switch to "ON" position then the cooling fan will
start to work immediately.
4. Open the gas regulator valve and adjust to adequate air pressure and flow.
Attention: Please make sure the air pressure and the current are adjusted to the best
extent in order to achieve the best cutting. Too high gas flow will strengthen
the cooling and it will make unstable arc even no arc. However too low gas
flow will make tip and electrode overheat and easily burn.
5. Click on the torch switch and solenoid valve starts, also HF arc-striking can be heard,
meanwhile gas flows out through tip.

SUPER Series · User’s Manual
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INSTALLMENT & OPERATION
For MMA
Correctly connect the electrode holder and earth clamp according to the sketch.
1. Put the cable connector of the electrode holder to the negative terminal “-“and
fasten it clockwise.
2. Please follow point 1 to connect the earth clamp to the positive terminal “+”
3. Please pay attention to the connecting polarity and there are two connecting
method for DC welding machine: positive connection and negative connection.
3.1 Positive connection: holder connects with “-“polarity, work-piece with the “+”
polarity.
3.2 Negative connection: work-piece to the “-“polarity, electrode holder to the “+”
polarity.
3.3 Choose suitable method according to the welding requirement. If unsuitable
method is selected, it will cause unstable arc, more spatters and conglutination.
If such case occurs, please change the polarity of the welding cables.
4. Switch to “MMA”.
5. Switch the power switch to “ON” position then the cooling fan will start to work
immediately.
6. Please adjust appropriate welding current and rod according to thickness of work-
piece and welding craft.
Electrode standard
Electrode Diameter (mm)
1.6 2.0 2.5 3.2 4.0 5.0
Welding Current (A) 25-40 40-65 50-80 100-130
160-210
200-270
No. Name
1 Earth clamp
2 Electrode holder
SUPER Series · User’s Manual
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INSTALLMENT & OPERATION
For TIG
1. Connect gas hose with copper connection on rear panel of the machine then fasten
the connector with hose clamp to prevent from leaking gas.
2. Please connect the earth clamp and torch correctly as below:
2.1 The connector of gas-electricity integration to the front panel and fasten it
clockwise.
2.2 The pin connector to the front panel and fasten it clockwise.
2.3 The cable connector of the earth clamp to the positive terminal “+”.
3. Switch to “TIG” and click the power switch to “ON” then the cooling fan will start to
work immediately.
4. Open the argon regulator valve and adjust to adequate air pressure and flow.
5. Click on the torch switch and then the solenoid valve clicks on, also HF arc-striking
can be heard, meanwhile argon gas flows out through tip.
Attention: The torch switch should be kept on for several seconds before welding for the
first time, and it’s ready to work after all the air is out. And argon will still flow
out in several seconds when the welding stops and this special design is to
continue protecting the welding spot before cooling. In that case, please
remain the welding position for a while even the arc is extinct.
6. Please adjust appropriate welding current according to the thickness of work piece
and welding craft.
7. Please keep a distance of 2-4mm between the tungsten and work-piece, then click
on the torch switch and there will be HF spark between electrode and work-piece,
after arc-striking the sound from the HF discharging in the machine will disappear at
once, and now it’s ready to weld.