HotStart (also: hot start, start current boost) is an automatic starting current function in electrode welding machines (MMA/manual metal arc welding), which ensures an improved ignition process. When starting the welding process, the current is increased for a short moment to ensure easier and safer ignition of the arc.
How it works:
Especially in electrode welding, the start of the arc is often the most critical phase – particularly with cold-stored or coated electrodes. Without support, starting problems can occur, such as an unstable arc or unwanted sticking of the electrode.
Hot Start solves this problem by automatically increasing the current beyond the preset value for a short moment (a few milliseconds) during ignition.
As a result:
the electrode heats up faster,
the arc ignites more quickly,
and the transition of the welding current is improved.
After this short phase, the current falls back to the set welding value.
Advantages:
More reliable arc start: Fast and safe ignition of the electrode – especially with electrodes that are difficult to ignite types of electrodes.
Less electrode sticking at start: The high starting energy prevents sticking.
Clean seam start: Improved arc stability right from ignition ensures an aesthetically even seam from the beginning.
Efficient even with damp or cold electrodes: Hot Start supports ignition even under adverse conditions.
Especially helpful for beginners: Less frustration during the first ignition attempts, which significantly facilitates the welding process.
Application area:
Hot Start is a function for electrode welding. It is used especially with rutile electrodes, basic electrodes, and under demanding conditions.
Combination with other functions:
In combination with ArcForce and AntiStick, a particularly user-friendly welding system is created. While Hot Start ensures safe ignition, ArcForce provides arc stability during operation, and AntiStick prevents the electrode from sticking in case of errors.
RED by Lorch welding machines with ArcForce function: