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Avoid Leister VARIMAT V2 Temperature Inconsistency

Temperature inconsistency can have a significant impact on weld quality and seam consistency. Fortunately, the Leister VARIMAT V2 is a very reliable tool.

In addition, there are several steps you can take to avoid airflow and temperature consistency issues. 

1. Clean the Nozzle and Air Filter 

First, check that the holes on the flat part of the nozzle are free of any blockages that may be restricting air flow. Do this prior to starting your weld, and before starting any new seams.

In addition, prior to using the welder, check that the heat gun’s air filter (located around the power cord) is clean. Any blockage can restrict air flow, which means the air existing the nozzle will be hotter that required.

2. Align Air Speed and Temperature

Next, make sure the air volume of the blower isn’t set too high. If air is moving through the tool too quickly, then the heating element may not be able to reach the proper temperature.

When welding at air temperatures above 932°F, the VARIMAT V2’s blower setting must be manually set to less than 100%. Use the table to find the appropriate air volume needed to reach a specific temperature: 

VARIMAT V2 Temp Inconsistency Graph

3. Provide Clean, Consistent Power

Finally, check that you have the proper power source and that the power cord isn’t damaged (e.g. cut, frayed, sliced). If too little power is reaching the machine, performance will suffer.

Following are the power source requirements for the VARIMAT V2 for generators, wall outlets, and extension cords:

Generator (all minimum requirements):

  • 6500 Watts continuous power
  • 230 Volts
  • 30 Amps
  • Single phase

Wall outlet (all minimum requirements):

  • 6500 Watts
  • 230 Volts
  • 30 Amps
  • Single phase

Extension Cord:

  • 10-3 gauge wire or lower
  • 150-foot cord length maximum

If you are still having temperature inconsistency issues, contact your Leister authorized service center