031914 M3-5
SERVO MOTORS: Each motor has a built in
Resolver Feedback System that tells the Motion
Control Modules the exact speed, direction and
position of the Servo Motor. (Illustration 9) The
Motion Control Modules use this information to
send control information to the Servo Drives that
control the Servo Motors. There is a Thermistor
located in the windings of each motor. The
Thermistor helps to protect the motor from a
thermal overload. An “Over Temperature” Fault
is generated when the internal temperature of
the motor exceeds 170° C (338° F). The “Knife”
Servo Motor is equipped with an optional
holding brake. This Brake is used to hold the
Knife stationary whenever a "Master Off" button
is pressed. It is not used during a normal "Cycle
Stop." The Structure Lift Servo Motor is also
equipped with an internal Brake that engages to
hold them stationary when a “Master Off” button
is pressed.
RESOLVER FEEDBACK SYSTEM
Each Servo Motor has a built in “Resolver
Feedback” system. A Resolver is a rotating
transformer that creates sinusoidal signals (Sine
and Cosine), that relate to the shaft position of
the Servo Motor. These signals are sent to the
Motion Control Modules and determine the
“absolute motor position.” The Motion Control
Modules use the Resolver Feedback signals
generated by the Servo Motors to monitor and
control the Servo Drives and the Servo Motors.
ILLUSTRATION 10
RESOLVER FEEDBACK CABLE RESOLVER
M10
SERVO
MOTOR
M12
SERVO
MOTOR
M14
SERVO
MOTOR
ILLUSTRATION 9
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