Belt Travel Pulser
THAYER’S belt travel pulser assembly includes a precision cast/machined wheel with a “pre-calibrated” circumferential tolerance of ± 0.05% and a high resolution digital transmitter. The transmitter produces pulses equivalent to 1/100 to 1/200 of a foot of belt travel. A spring is used to maintain proper contact pressure of the wheel with the tension side of the belt in all operating conditions. The speed pick-up wheel has a narrow face width so it is less susceptible to material build-up, which can result in speed measuring errors. Since belt stretch is not constant throughout the length of the conveyor, and therefore, can affect speed measurement, the speed pickup produces a more accurate speed signal than that which is produced by tail pulley mounted speed encoders.
The speed transmitter is a high resolution, optical pulse generator. The transmitter is equipped with special seals designed for operation in an environment laden with abrasive dust such as iron ore taconite or coal. The pulse frequency is directly proportional to the speed of the conveyor belt and each pulse represents a specific increment of belt travel.
Precision Belt Speed Measurement
Accurate belt speed measurement requires the use of a precision wheel and pulser. A spring is used to maintain proper contact pressure of the wheel with the tension side of the belt in all operating conditions.