The timing sensor used on a rotary table is typically what kind of sensor?

The timing sensor used on a rotary table is typically what kind of sensor?

• A. Capacitive
• B. Inductive
• C. Optical
• D. Magnetic

Answer: (B)

Timing signals on a rotary table need a sensor that can produce a clean, repeatable pulse each time the fixed angular reference passes by. An inductive sensor fits this role best because it detects metal targets without any contact. When a metal tooth or flag on the table passes the sensor, the metal nearby changes the inductance in a small coil, creating a sharp pulse that marks a precise angular position. This is especially valuable in machine shops where coolant, oil, chips, and dirt are common—the sensor remains reliable even with dirty surfaces or coatings, unlike optical sensors that require a clear line of sight. Capacitive sensors can be disrupted by nearby metals and dielectric changes, while magnetic sensors need magnets or ferrous targets and aren’t as universally applicable. So the timing sensor is typically inductive for robustness, speed, and compatibility with standard metal targets.

Timing signals on a rotary table need a sensor that can produce a clean, repeatable pulse each time the fixed angular reference passes by. An inductive sensor fits this role best because it detects metal targets without any contact. When a metal tooth or flag on the table passes the sensor, the metal nearby changes the inductance in a small coil, creating a sharp pulse that marks a precise angular position. This is especially valuable in machine shops where coolant, oil, chips, and dirt are common—the sensor remains reliable even with dirty surfaces or coatings, unlike optical sensors that require a clear line of sight. Capacitive sensors can be disrupted by nearby metals and dielectric changes, while magnetic sensors need magnets or ferrous targets and aren’t as universally applicable. So the timing sensor is typically inductive for robustness, speed, and compatibility with standard metal targets.