Case Study - Industrial Robot and Conveyor Automation Demo

Conveyor System

Brushless DC Motors

The BLH series brushless DC motor is driving the conveyors.

The RUN/BRAKE input of the BLH driver is controlled directly by the MRC controller.

When the Signal Out (PRG-DOUT) command in the program of the MRC is executed, the BLH driver runs the BLH motor.

The sensor output is connected to one of the Direct inputs of the MRC controller.

When the sensor is triggered, the assigned VIR-IN is turned ON.

The MRC controller can program different actions when VIR-IN is ON. In this case, the PRG-DOUT-CLR (program output clear) output is assigned.

Therefore, the RUN/BRAKE input is turned OFF when sensor triggers, stopping the conveyor.

In this application, to provide extra safety, the STOP input is also assigned to the PRG-DOUT-CLR output using the virtual input VIR-IN.

BLH Series BLDC Conveyor Control

Timing Chart

 

When Direct Input1 is ON, PRG-DOUT-CLR is ON.

This means turn off the PRG-DOUT1

Parameter screen

Rotary Encoder

A Rotary Encoder is mounted on a wheel to measure the actual conveyor belt movement.

The Rotary Encoder offers twin shaft style, solid shaft and hollow shaft to make easily on the drive shaft directly or using a wheel like this demonstration.

Mounting on drive shaft saves space while mounting to a wheel on the belt will measure the actual belt speed even if slippage occurred.

Three signal output styles are available; Voltage, Open-Collector and Differential (Line driver).

Voltage style is conveniete when an external voltage source is not available since the voltage of output is internally provided.

Open-Collector is more common and can accept wider external voltage range 5v to 24v of source.

Differential (Line driver) is useful when the environment has electrical noise.

 

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