Welding simulator
Strike an arc and run a bead: travel speed, arc length and torch angle, just like in the shop. Mistakes of the hand stay in the bead and turn into imperfections with ISO 6520-1 numbers, and at the end you can cut the weld open and look inside.
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What is real here
The windows come from practice: SMAW arc length about the rod diameter (2.5–4 mm for a 3.2 mm rod), MIG contact-tip-to-work distance 8–15 mm, travel speed 2–4 mm/s for SMAW, 4–8 for MIG and 1.5–3 for TIG, a 5–20° drag angle for the rod and a push angle for TIG. The clock is real time.
One shortcut is deliberate: the rod burns here about seven times slower than in real life (where it shortens by 3–5 mm per second). Otherwise your hand would leave the screen in five seconds. The feeling that you must keep feeding the rod is kept.
The bead shape is a simplified model: whatever metal is fed per millimetre is laid there; width grows with heat, heat builds up if you stand still and flows into the plate over time. The reinforcement limit follows ISO 5817 level C (1 mm + 0.15 × width). This trains the link between hand and bead; it does not replace a test coupon.
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