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Conveyor Manufacturers


Conveyor manufacturers produce product mostly for the material handling industry and come in many forms such as belted, cleated and rollers packaged with different motor and drive combinations. A majority of conveyors do not utilize a servo motor which has a feedback positioning device.  Most come with standard AC or DC Motors and no feedback device making the control package an OPEN-LOOP system. In order for the manufacturer to offer the option of a CLOSED-LOOP electrical feedback system, rotary encoders are required and are mounted to drive shaft or friction coupled to the belting to measure speed or position.  Our wheeled encoders are an excellent choice.

Photocraft offers to this Industry many options that will work for several applications.  Our most popular encoder models are as follows:


R Series

Shaft encoders are planned for direct coupling to a device shaft. Thus they generate a specific output pulse for each revolution of that Device shaft. To adapt or adjust to angular and rotational misalignment between two shafts; Tri-Tronics recommends a flexible shaft coupling or similar. Direct Mount is not recommended and may minimize or reduce Bearing Life. The R20 incorporates heavy duty bearings that can be used in driving a timing shaft and/or pulley system.


HS Series

Hollow shaft encoders are designed with either a through-bored shaft or a blind-bored shaft, and intended to mount directly onto a motor or other shaft. This eliminates the need for a shaft to shaft coupling and mounting adapter, resulting in both space and cost savings. The encoder "floats" on the motor shaft. A tether or flexible mounting bracket prevents the encoder from turning, yet accommodates shaft-to-shaft misalignment.


RH or R Series "Wheeled"

An incremental encoder that uses precision measuring wheel(s) to directly measure the movement of a conveyor belt, or to accurately measure the moving material. Wheeled encoders more accurately track the conveyor belt or other material than shaft encoders. Two problems with shaft encoders in this application are: (1) slippage of the conveyor belt on the roller, and (2) inaccuracy of roller diameters. Both of these contribute to inaccuracies that reduce the overall efficiency of a material handling sortation system or precision measuring system. Wheeled encoders ride directly on the moving material, use a wheel tread having a high coefficient of friction, and have a very low starting torque resulting in virtually no slippage of the wheels on the belt. In addition, the wheels are precision ground with exacting tolerances, versus a roller which has a much larger tolerance and its circumference seldom translates into an integral number of encoder pulses per unit of linear movement.

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