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Frequently Asked Questions

Plasma Welding

What causes excessive Plasma Welding consumable wear? What causes excessive Plasma Welding consumable wear?

Causes of excessive consumable wear.

  • Gas distributor inserted backwards.  Small Collar to the back of the torch.
  • Improper electrode re-sharpening.  If they are sharpening their own tungsten’s they must sharpen on a tungsten grinder at a 20 degree included angle.  If the point of the tungsten is not centered it will cause premature failure of the tip.
  • Tip not sized for the welding current.  Tips are rated at their maximum current capability with the electrode set flush with the end of the tip.
  • Wrong welding gases used.  Must be two independent supplies.  Only use pressure regulators not regulator/flowmeters.  Set both Plasma and shield pressures to 40psi.  Argon only for the plasma gas.  If Stainless steel or titanium use a 95/5 Argon/Hy for the shield gas.  Mild steel argon for the shield gas.
  • Electrode set back and plasma gas flow incorrect for the process.  Be sure they are using the setback tool provided in the parts kit when setting electrode setback.  Setback are used for keyhole process.  Melt in fusion set the electrode flush with the end of the tip.
  • Coolant leak inside torch.  The 4A torch has a liner the tip screws into.  If when replacing the tip they do not support the liner from loosening they will produce a leak.
  • Contaminated coolant.  Must use nonconductive coolant.  If the coolant becomes conductive consumables and torch will fail.
  • Pilot arc turned on and off often and/or startup and shut down procedure incorrect.  Best to leave pilot arc on continuously through the work shift.  Before turning on the pilot purge the torch for 3 to 5 minutes.

SANSTICK 160S

Does it have a gas valve? Does it have a gas valve?

No, TIG Torch requires a gas valve with connection to shielding gas regulator.

Does the 160S have remote control? Does the 160S have remote control?

No,  The 160S does not have remote control functions.

What TIG torch is compatible with it? What TIG torch is compatible with it?

A optional TIG Torch is available with standard off the shelve 10N series consumables.  See Brochure for details.  You can also use any Air Cooled TIG Torch that has a Dinse 50mm power plug and gas valve.

What input power can I plug into? What input power can I plug into?

115vac and 230vac Single Phase.

Does it have PFC? Does it have PFC?

Yes,  For an explanation of PFC see FAQ Support Topic “Power Factor Correction – What is it?  Why is it required?  How is it Achieved?”

Can I run 6010 electrodes with it? Can I run 6010 electrodes with it?

Yes, you can run 6010 electrodes.

SANARG 180AP

What TIG torch is compatible with the 180AP? What TIG torch is compatible with the 180AP?

A TIG Torch is included with standard off the shelve 10N series consumables with remote torch controls.  You can also use any Air Cooled TIG Torch that has a Dinse 50mm power plug.

What input power can I plug into? What input power can I plug into?

115vac and 230vac Single Phase.

Does it have PFC? Does it have PFC?

Yes,  For an explanation of PFC see FAQ Support Topic “Power Factor Correction – What is it?  Why is it required?  How is it Achieved?”

Why can’t I run 6010 rod with my welding machine? Why can’t I run 6010 rod with my welding machine?

It comes down to cost.  To run E6010 electrodes must have a big inductor and suitable software.  This added circuitry is needed because E6010 does not contain potassium in the flux.  Potassium helps to stabilize the arc. It will run E6011 just fine.

Does the Sanarg 180AP have HF start? Does the Sanarg 180AP have HF start?

Yes, the Sanarg 180AP does have High Frequency start.

Support Topics

How to use Generators to power welders? How to use Generators to power welders?

Generator power vs mains power

Compared to mains power, generator power can be characteristically ‘dirty’ and thus has the potential to damage sensitive electronic components inside inverter welding machines. This is especially the case with smaller generator sets that are often chosen for operating the likes of power tools and welders, due to their portability and affordability.

At the same time, the ability to use generator power offers many advantages to operators wanting to run their inverter welding machines in the field or on-site where it is impossible or difficult to access mains power.

So, it is no surprise that one of the first questions operators ask before they consider purchasing an inverter welding machine is: “is it safe to run off a generator?”.  The truthful answer is not always a “yes”.  Sure, plug virtually any inverter welder into a generator and it will likely operate to some level.  But not all generators are created equal and have clean power.

Why is generator power potentially harmful?

AC (mains) power supply follows a pattern called a sine wave.  When it comes to running equipment with sensitive electronics (like inverter machines and computers) power supply with a perfectly clean sine wave is the safest, however in reality this is almost impossible to achieve.

A perfectly ‘clean’ 240V single phase AC sine wave would look something like this:

Mains power is (usually) relatively close to perfect sine power and therefore it rarely poses any problems.

On the other hand, power supply from a portable generator is, by comparison, typically ‘dirty’. The peaks, troughs and cycle frequency will not be consistent even though the average output power may still read 240V on a simple measuring device like a multimeter.  Generator power can also be characterized by voltage ‘surges’ (a rise in voltage) and voltage ‘spikes’ (very sudden peaks of excessive voltage).

In a generator, voltage surges and spikes can occur due to several reasons, including:

  1. Generator Quality: All portable generators typically produce inconsistent power when compared to perfect sine wave power.  This degree of variation from perfect sine wave power is measured as a percentage called ‘Total Harmonic Distortion’ or THD.  An acceptable THD rating in a portable generator is generally considered to be 6% or less.  In recent years, the market has faced a lot of imports of cheap, poor quality generators with unacceptably high THD ratings (over 6%).  While these cheaper generators may run basic power tools without a problem, they are not suitable for running inverter-based machines because the voltage is likely to fluctuate and spike at an unacceptably severe level.
  2. Start up and Shut down: When starting and stopping a generator the engine is obviously not running smoothly and at a constant speed and therefore the output of the generator is very likely to fluctuate with engine speed.
  3. Fuel supply interruption: Like start up and shut down, if the generator runs out of fuel, or if there is a ‘hiccup’ in the fuel supply, the engine will typically speed up and slow down very spasmodically, again causing power fluctuations.
  4. Loading vs. Generator size: A generator that is under-sized &/or over-loaded will work very hard to try and maintain sufficient current supply. Then when the load is removed (eg when welding stops), the engine will typically over-rev until the governor returns the engine to idle speed. This over-revving the generator will very likely increase the voltage output, sometimes to a dangerous level.
  5. Additional loads: The use of other devices (eg; grinder, cut-off saw, etc) on the same generator and at the same time as the welding machine can cause overloading, and therefore cause power fluctuations, if the generator size is not sufficient.
  6. Lack of maintenance: A poorly maintained generator will behave in the same way that a poor-quality generator does.

A typical generator with a high THD over 6% would look something like this.  This is NOT a generator you would want to operate your welding equipment, computer, etc. with.

Why are inverter welders vulnerable?

To significantly reduce the size of the transformer and achieve the many advantages that the inverter gives us (reduced size/weight, etc), the input power must be ‘treated’ before it enters the transformer – in other words instead of immediately passing through the transformer, it first passes through sensitive electronic components.

The main components of concern are capacitors.  Capacitors are devices which constantly charge and discharge voltages.  In an inverter welder, the capacitors will charge at approximately 1.4 times the standard input voltage.  So, in the case of 240V power supply they will charge at about 335V.  The same will occur in the case of a voltage surge or spike.  So, for a 280V surge, they would charge at about 395V which is a voltage increase of 155V.  It is this significant fluctuation in working voltage that can damage or destroy electronic components in an inverter welding machine.

Input voltage protection

At SanRex, we recognize that many operators (especially in rural, construction and maintenance industries) have the need to run their welder off a generator.

SanRex machines are specifically designed to protect against a high level of voltage fluctuations and dirty power.

The following features have been incorporated into SanRex machines to ensure optimum protection from power supply fluctuations:

  • Voltage Sensing Device: This device monitors the input voltage of the machine and if the voltage rises above (or below) a certain level the machine automatically shuts off the voltage supply to vulnerable components.
  • High Voltage Capacitors: SanRex inverters incorporate high performance capacitors which give the machines a higher tolerance against input voltage fluctuations and reduce the risk of damage to the capacitor and other components.
  • Over Specified Componentry & Stress Tested: Key components in SanRex machines are over-specified for guaranteed reliability, and each machine is rigorously tested during manufacture.
  • PFC Technology: In addition, SanRex machines are fitted with PFC (or power factor correction) technology. Put simply, PFC automatically compensates for any fluctuations in input voltage, to deliver a very consistent and ‘clean’ power to the inverter. This greatly reduces the risk of damage from dirty power. It also significantly increases efficiency, allowing these machines to offer a higher output and duty cycle.

Because of this, SanRex inverters include protection circuitry that protects internal components from dirty power.

Bottom line:

  • Do not hook SanRex machines to any generator you would not be comfortable hooking your computer to.
  • Clean power gensets only with a low THD. Name brand means nothing.

If a SanRex machine is rebooting or showing an error when operating on a generator it is most likely because of dirty power produced by the generator.  Our welding machine is protecting itself from the power supplied telling you it will not function on this generator.  A generator issue, not a Welding machine issue.

What is (GTAW) TIG Welding? What is (GTAW) TIG Welding?

GTAW (Gas Tungsten Arc Welding)

An arc welding process which produces coalescence of metals by heating them with an arc between a tungsten (nonconsumable) electrode and the work.  Shielding is obtained from a gas or gas mixture.

Lift Start TIG

Lift Start was developed to provide a positive means of starting the Gas Tungsten Welding arc without high frequency.  High frequency energy has been a very effective method of initiating the arc, but in some cases interferes with computerized equipment.  In an effort to solve this problem, other means to start the arc were needed.  Capacitor discharge circuits have been used, but they also produce radio frequency interference.  Also, both high frequency and capacitor discharge circuits are limited to relatively short torch lead lengths.

Lift Start GTAW is not the same as “Scratch Tig”’ which results in rapid deterioration of the tungsten.  Lift Start works quite differently.  Lift Start circuitry permits the tungsten electrode of the GTAW torch to be placed precisely at the start of the weld, without damage to the tungsten or base metal.  When the tungsten contacts the metal, the power supply limits it’s output to a very low preset value.  The welding arc does not come on until after the tungsten is withdrawn from the metal.  The power supply then automatically adjusts it’s output to the selected welding amperage.  Lift Start may be used with AC or DC operation and may be used with torch leads up to 25ft.

AWS – Recommended Tungsten Electrode, gas cups and welding current

Basic Tig Welding Guide

Electrode Polarity

Connect the TIG torch to the – / TORCH terminal and the work lead to the + / WORK terminal for direct current straight polarity.  Direct current straight polarity is the most widely used polarity for DC TIG welding.  It allows limited wear of the electrode since 70% of the heat is concentrated at the work piece.

Power factor correction – What is it? Why is it required? How is it achieved? Power factor correction – What is it? Why is it required? How is it achieved?

PFC is the acronym for power factor correction.

In laymen’s terms a welding machine with PFC will use less input current than a welding machine without PFC for the same output current setting.   PFC is very helpful when operating on standard 115vac circuits.  For example, lets say a welding machine without PFC operating on a 20 amp 115vac circuit may only be able to produce 100 amps of output current without tripping the wall circuit breaker, but a welding machine with PFC operating on the same 20 amp 115vac circuit could produce 125 amps of welding output without tripping the wall circuit breaker.  Big advantage when using a 1/8″ welding electrode that operates from 110 – 120 amps DC.  The welding machine with PFC can perform a weld with this electrode where the welding machine without PFC cannot without tripping the wall circuit breaker.

Power factor basics:

Power quality is essential for efficient equipment operation, and power factor contributes to this.

Power factor is the measure of how efficiently incoming power is used in an electrical installation. It is the ratio of active to apparent power, when:

  • Active Power (P) = the power needed for useful work such as turning a lathe, providing light or pumping water, expressed in Watt or KiloWatt (kW)
  • Reactive Power (Q) = a measure of the stored energy reflected to the source which does not do any useful work, expressed in var or Kilovar (kVAR)
  • Apparent Power (S) = the vector sum of active and reactive power, expressed in Volt Amperes or in KiloVolt Amperes (kVA)

The power triangle:

Poor power factor (for example, less than 95%) results in more current being required for the same amount of work.

Power factor correction

Power factor correction (PFC) aims to improve power factor, and therefore power quality. It reduces the load on the electrical distribution system, increases energy efficiency and reduces electricity costs. It also decreases the likelihood of instability and failure of equipment.

Power factor correction is obtained via the connection of capacitors which produce reactive energy in opposition to the energy absorbed by loads such as motors, locally close to the load. This improves the power factor from the point where the reactive power source is connected, preventing the unnecessary circulation of current in the network.

Determining the PFC required

The selection of PFC equipment should be done according to the following four-step process, by persons with the relevant skills:

Step 1: Calculation of the required reactive power

The objective is to determine the required reactive power (Qc (kvar)) to be installed, in order to improve the power factor (cos φ) and reduce the apparent power (S).

Qc can be determined from the formula Qc = P (tan φ – tan φ‘), which is deduced from the diagram.

  • Qc = power of the capacitor bank in kVAr
  • P = active power of the load in kW
  • tan φ = tangent of phase shift angle before compensation
  • tan φ’ = tangent of phase shift angle after compensation

The parameters φ and tan φ can be obtained from billing data, or from direct measurement in the installation.

Step 2: Selection of the compensation mode

The location of low-voltage capacitors in an installation can either be central (one location for the entire installation), by sector (section-by-section), at load level, or a combination of the latter two.

In principle, the ideal compensation is applied at a point of consumption and at the level required at any moment in time. In practice, technical and economic factors govern the choice.

The location is determined by:

  • the overall objective (avoiding penalties on reactive energy, relieving transformers or cables, avoiding voltage drops and sags)
  • the operating mode (stable or fluctuating loads)
  • the foreseeable influence of capacitors on the network characteristics
  • the installation cost

Step 3: Selection of the compensation type

Different types of compensation should be adopted depending on the performance requirements and complexity of control:

  • Fixed, by connection of a fixed-value capacitor bank
  • Automatic, by connection of a different number of steps, allowing adjustment of the reactive energy to the required value
  • Dynamic, for compensation of highly fluctuating loads

Step 4: Allowance for operating conditions and harmonics

Operating conditions have a great impact on the life expectancy of capacitors, so the following parameters should be taken into account:

  • Ambient temperature (°C)
  • Expected over-current related to voltage disturbances, including maximum sustained overvoltage
  • Maximum number of switching operations per year
  • Required life expectancy

Some loads (variable speed motors, static converters, welding machines, arc furnaces, fluorescent lamps, etc.) pollute the electrical network by reinjecting harmonics. It is therefore also necessary to consider the effects of these harmonics on the capacitors.

The benefits of power factor correction

Savings on the electricity bill

Power factor correction eliminates penalties on reactive energy, decreases demand on kVA, and reduces power losses generated in the transformers and conductors of the installation.

Increased available power

Fitting PFC equipment on the low voltage side increases the power available at the secondary of a MV/LV transformer. A high power factor optimizes an electrical installation by allowing better use of the components.

Reduced installation size

Installing PFC equipment allows conductor cross-section to be reduced, as less current is absorbed by the compensated installation for the same active power.

Reduced voltage drops

Installing capacitors allows voltage drops to be reduced upstream of the point where the PFC device is connected, therefore preventing overloading of the network and reducing harmonics.

 

SANMIG 200MF

What is the type of the MIG Gun contact tips and nozzles? What is the type of the MIG Gun contact tips and nozzles?

Tweco 11 series on the 200MF and 14 series on the 250MF.

Can I put a Spoolgun on a 200MF? Can I put a Spoolgun on a 200MF?

Yes,  See Brochure.  We offer a Spool gun for the 200MF and 250MF.  It cannot be attached to any other units.

What TIG torch is compatible with it? What TIG torch is compatible with it?

A optional TIG Torch is available with standard off the shelve 10N series consumables.  See Brochure for details.  You can also use any Air Cooled TIG Torch that has a Dinse 50mm power plug and gas valve.

What input power can I plug into? What input power can I plug into?

115vac and 230vac Single Phase.

Does it have PFC? Does it have PFC?

Yes,  For an explanation of PFC see FAQ Support Topic “Power Factor Correction – What is it?  Why is it required?  How is it Achieved?”

Why can’t I run 6010 rod with my welding machine? Why can’t I run 6010 rod with my welding machine?

It comes down to cost.  To run E6010 electrodes must have a big inductor and suitable software.  This added circuitry is needed because E6010 does not contain potassium in the flux.  Potassium helps to stabilize the arc. It will run E6011 just fine.

SANMIG 250MF

What is the type of the MIG Gun contact tips and nozzles? What is the type of the MIG Gun contact tips and nozzles?

Tweco 11 series on the 200MF and 14 series on the 250MF.

Can I put a spoolgun on a 250MF? Can I put a spoolgun on a 250MF?

Yes,  See Brochure.  We offer a Spool gun for the 200MF and 250MF.  It cannot be attached to any other units.

What TIG torch is compatible with it? What TIG torch is compatible with it?

A optional TIG Torch is available with standard off the shelve 10N series consumables.  See Brochure for details.  You can also use any Air Cooled TIG Torch that has a Dinse 50mm power plug and gas valve.

What input power can I plug into? What input power can I plug into?

115vac and 230vac Single Phase.

Does it have PFC? Does it have PFC?

Yes,  For an explanation of PFC see FAQ Support Topic “Power Factor Correction – What is it?  Why is it required?  How is it Achieved?”

Why can’t I run 6010 rod with my welding machine? Why can’t I run 6010 rod with my welding machine?

It comes down to cost.  To run E6010 electrodes must have a big inductor and suitable software.  This added circuitry is needed because E6010 does not contain potassium in the flux.  Potassium helps to stabilize the arc. It will run E6011 just fine.

SANSTICK 140S

What TIG Torch is compatible with a 140S? What TIG Torch is compatible with a 140S?

A optional TIG Torch is available with standard off the shelve 10N series consumables.  See Brochure for details.  You can also use any Air Cooled TIG Torch that has a Dinse 25mm power plug and gas valve.

Does it have a gas valve? Does it have a gas valve?

No, TIG Torch requires a gas valve with connection to shielding gas regulator.

Does the 140S have remote control? Does the 140S have remote control?

No,  The 140S does not have remote control functions.

What input power can I plug into? What input power can I plug into?

115vac and 230vac Single Phase.

Does the 140S have PFC? Does the 140S have PFC?

No, it does not.  The 160S does have PFC.

Why can’t I run 6010 rod with my welding machine? Why can’t I run 6010 rod with my welding machine?

It comes down to cost.  To run E6010 electrodes must have a big inductor and suitable software.  This added circuitry is needed because E6010 does not contain potassium in the flux.  Potassium helps to stabilize the arc. It will run E6011 just fine.

SANARG 160P

What input power can I plug into? What input power can I plug into?

115vac and 230vac Single Phase.

Can I run 6010 electrodes with it? Can I run 6010 electrodes with it?

Yes, you can run 6010 electrodes.

SANARG 300AP

What input voltage can I use? What input voltage can I use?

208-230 Single Phase, 208-230,460 three phase.

Can I run 6010 electrodes with it? Can I run 6010 electrodes with it?

Yes, you can run 6010 electrodes.

SANMIG 400M

What input voltage can I use? What input voltage can I use?

208-230 Single Phase, 208-230,460 three phase.

Does the 400M have MIG Pulse? Does the 400M have MIG Pulse?

No, the SANMIG 400M does not include MIG Pulse.  For MIG pulse purchase our 400MP.

Can I run 6010 electrodes with it? Can I run 6010 electrodes with it?

Yes, you can run 6010 electrodes.

SANMIG 400MP

What input voltage can I use? What input voltage can I use?

208-230 Single Phase, 208-230,460 three phase.

Does the 400MP have MIG Pulse? Does the 400MP have MIG Pulse?

Yes, The 400MP has MIG pulse built in.

Can I run 6010 electrodes with it? Can I run 6010 electrodes with it?

Yes, you can run 6010 electrodes.

TIG Welding

How to setup Pulse TIG function? How to setup Pulse TIG function?

Description and general setting for Pulse TIG welding.

Pulse TIG

What is (GTAW) TIG Welding? What is (GTAW) TIG Welding?

GTAW (Gas Tungsten Arc Welding)

An arc welding process which produces coalescence of metals by heating them with an arc between a tungsten (nonconsumable) electrode and the work.  Shielding is obtained from a gas or gas mixture.

Lift Start TIG

Lift Start was developed to provide a positive means of starting the Gas Tungsten Welding arc without high frequency.  High frequency energy has been a very effective method of initiating the arc, but in some cases interferes with computerized equipment.  In an effort to solve this problem, other means to start the arc were needed.  Capacitor discharge circuits have been used, but they also produce radio frequency interference.  Also, both high frequency and capacitor discharge circuits are limited to relatively short torch lead lengths.

Lift Start GTAW is not the same as “Scratch Tig”’ which results in rapid deterioration of the tungsten.  Lift Start works quite differently.  Lift Start circuitry permits the tungsten electrode of the GTAW torch to be placed precisely at the start of the weld, without damage to the tungsten or base metal.  When the tungsten contacts the metal, the power supply limits it’s output to a very low preset value.  The welding arc does not come on until after the tungsten is withdrawn from the metal.  The power supply then automatically adjusts it’s output to the selected welding amperage.  Lift Start may be used with AC or DC operation and may be used with torch leads up to 25ft.

AWS – Recommended Tungsten Electrode, gas cups and welding current

Basic Tig Welding Guide

Electrode Polarity

Connect the TIG torch to the – / TORCH terminal and the work lead to the + / WORK terminal for direct current straight polarity.  Direct current straight polarity is the most widely used polarity for DC TIG welding.  It allows limited wear of the electrode since 70% of the heat is concentrated at the work piece.

Aluminum MIG Welding

What Push Pull MIG Gun do I use for Aluminum Welding? What Push Pull MIG Gun do I use for Aluminum Welding?

For Aluminum MIG Welding we offer our 400M or 400MP with our Sky 4HD Wire Feeder and Binzel PPI Push Pull MIG Gun or with the MK Python System.

See Brochures for ordering information.

400M Brochure

400MP Brochure

Binzel PPI Push Pull MIG Gun Option.

MK Python Push Pull MIG Gun Option.

Sanfeed Sky 4HD Brochure

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