Rockwell-automation 8510 AC Spindle Drive System User Manual Manual de usuario descargar pdf (Pagina 72)

Interface Signal Descriptions

Chapter 7

7-68

Thermal Switch – CN3-13 & 20

Thermal switch that is embedded in the motor windings to indicate a motor

overtemperature condition.

Cable Shields – CN3-1, 2, 3 & 4

The resolver cable must contain twisted shielded pairs with an additional

overall shield and all shields must be terminated to these pins.

Orient Feedback Signals Connector CN2 provides the connection to the orient feedback sensor when

the drive is being used to perform spindle orient. If spindle orient is being

done by the CNC, the sensor must be connected to the CNC and not to the

drive. Either an optical encoder or the high resolution magnetic sensor can

be terminated to this connector. Refer to Figure 7.3 for the connector

location. Refer the Chapter 8 for specific wiring instructions for each

feedback type.

Optical Encoder Feedback

Use an Allen-Bradley 845T series encoder with a type 33 electrical

interface or an equivalent optical encoder with an A, B, and Z channel that

uses a push-pull type single ended output and a +12V DC input voltage.

Encoder line count should be selected to meet the application requirements.

Maximum input frequency is 250 kHz. The encoder must be mounted with

a 1:1 mechanical connection to the spindle shaft that is being oriented.

Encoder Channel A Input and Ground – CN2-16 & 10

Channel A output from the orient optical encoder.

Encoder Channel B Input and Ground– CN2-15 & 9

Channel B quadrature output from the orient optical encoder.

Encoder Channel Z Input and Ground – CN2-14 & 8

Channel Z marker pulse output from the orient optical encoder.

Encoder Power Supply and Ground – CN2-6 & 4

Control power, +12V DC, to the optical encoder.

High Resolution Magnetic Sensor

With the 8610SA-PSA sensing head and matching 8510SA-PGxxx

feedback gear, orient resolutions of 225,000 to 500,000 parts per revolution

can be obtained. The sensing head provides offset sine waves for the

analog A, B, and Z channel outputs. Refer to Chapter 1 for a more

complete description of this function.

Magnetic Sensor Channel A Input – CN2-19 & 13

Channel A sine output from the high resolution magnetic sensor.

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Rockwell-automation 8510 AC Spindle Drive System User Manual Manual de usuario Pagina 72