Arcade machines are a staple in gaming venues, and their coin slots are critical for operation. To prevent jamming and fraud, manufacturers implement various anti-jam mechanisms. Here are the most common types:

1. Magnetic Sensors: These detect counterfeit coins by measuring magnetic properties, rejecting invalid tokens.

2. Optical Sensors: Infrared beams verify coin size and shape, ensuring only genuine coins pass through.

3. Weight-Based Mechanisms: Precision scales reject coins that don’t match the expected weight.

4. Tilt Sensors: These prevent shaking or tilting exploits by locking the slot if tampering is detected.

5. Mechanical Blockers: Physical barriers stop oversized or foreign objects from entering the slot.

These mechanisms ensure smooth gameplay and protect revenue for arcade operators. Regular maintenance is key to their effectiveness.