Motors and Machine Control Practice Final

What is a Direct Sensor

• Transmitter on one side sends a signal to the receiver on other side; object to be detected passes between the transmitter and receiver.

• Transmitter and receiver are one package and placed on side of object to be detected; special lens is used to filter light beam to project it in one plane

• Transmitter and receiver are housed in one package and are placed on same side of object to be detected; signal from transmitter is reflected by retroflector

What is a Retroreflective sensor?

• Transmitter on one side sends a signal to the receiver on other side; object to be detected passes between the transmitter and receiver.

• Transmitter and receiver are housed in one package and are placed on same side of object to be detected; signal from transmitter is reflected by retroflector

• Transmitter and receiver are housed in one package; object being detected reflected signal back to detector; no retroflector is used

What is a Polarized sensor?

• Transmitter on one side sends a signal to the receiver on other side; object to be detected passes between the transmitter and receiver.

• Transmitter and receiver are housed in one package and are placed on side of object to be detected; light beam is focused to a fixed point in front of the controller

• Transmitter and receiver are one package and placed on side of object to be detected; special lens is used to filter light beam to project it in one plane

What is a Specular s

• Transmitter send signal to receiver by reflecting signal of object to be detected; transmitter and receiver are not housed in same package and receiver must be positioned precisely to receive reflected light

• with a separate reflector: similar to diffuse reflective sensors, but they use a separate reflector to bounce light back to the receiver

• Transmitter and receiver are housed in one package and are placed on side of object to be detected; light beam is focused to a fixed point in front of the controller

What is a Diffuse sensor?

• Transmitter on one side sends a signal to the receiver on other side; object to be detected passes between the transmitter and receiver.

• – Transmitter send signal to receiver by reflecting signal of object to be detected; transmitter and receiver are not housed in same package and receiver must be positioned precisely to receive reflected light

• Transmitter and receiver are housed in one package; object being detected reflected signal back to detector; no retroflector is used

What is a Convergent Beam sensor?

• Transmitter and receiver are one package and placed on side of object to be detected; special lens is used to filter light beam to project it in one plane

• Transmitter and receiver are housed in one package and are placed on side of object to be detected; light beam is focused to a fixed point in front of the controller

• – Sensor emits light, and when an object interrupts the beam or reflects enough light back, the sensor detects the object and triggers a response

What are Diffuse Reflective sensor?

• They combine the transmitter and receiver. The sensor emits light, which reflects off the object and back to the light receiver. The precsense of an object is detected by the reflected light

• Transmitter send signal to receiver by reflecting signal of object to be detected; transmitter and receiver are not housed in same package and receiver must be positioned precisely to receive reflected light

• Sensor emits light, and when an object interrupts the beam or reflects enough light back, the sensor detects the object and triggers a response

What are Reflective Sensors?

• Transmitter and receiver are housed in one package and are placed on same side of object to be detected; signal from transmitter is reflected by retroflector

• they have a separate transmitter and receiver. The transmitter emits light and the reliever detects it. When an object breaks the beam, the sensor triggers

• with a separate reflector: similar to diffuse reflective sensors, but they use a separate reflector to bounce light back to the receiver

What is a Through-beam sensor?

• They have a separate transmitter and receiver. The transmitter emits light and the reliever detects it. When an object breaks the beam, the sensor triggers

• Transmitter and receiver are housed in one package and are placed on side of object to be detected; light beam is focused to a fixed point in front of the controller

• with a separate reflector: similar to diffuse reflective sensors, but they use a separate reflector to bounce light back to the receiver

What are the 3 MAIN types of Sensors?

• Limit Switch, Proximity sensor, and Photoeyes

• Pushbutton, Limit Switch, Pretravel

• Initial, Operating point, Overdue