It is recommended that the novice w

It is recommended that the novice welder learn not to depend on the reading of a gauge entirely. The
student welder will do well to acquaint himself, from the beginning, with the art of obtaining proper welding
temperature. This gives the welder the assurance that he controls the weld.
In units without variable temperature control, the air valve controls the air flow, and consequently the
temperature. The temperatures at which most thermoplastics achieve welding consistency ranges from
approximately 4000F to 5500F. The exact temperature can be established by placing a thermometer 3/16
inch away from the end of a round tip. Proper control temperature is of importance in obtaining
satisfactory welds.