M3-46 031914
SERVO MOTORS:
Servo Motors are used to optimize the performance of
the functions on the Slicer. (Illustration 62) A magnetic
field is created as the 3 phase AC voltage passes
through the windings in the Servo Motor. A Servo Motor
also has magnets built into the rotor of the motor. This
creates a permanent magnetic field that allows almost
immediate “speed” and “directional” changes. The
Servo Drive changes the phase rotation to change the
direction of the Servo Motor.
THERMAL PROTECTION: There is a
Thermistor located in the windings of the motor
that 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 M1 Knife
Servo Motor is water-cooled to help prevent
overheating.
INTERNAL HOLDING BRAKE: The M1 Knife,
M6 Structure Lift and the M7 Product Lift Servo
Motors are equipped with and optional Holding
Brake. A 24 VDC signal is required to disengage
the Brake. The Brake has a coil and 2 magnetic
friction plates that have “opposite” polarities. If
no voltage is sent to the Brake, the “opposite”
polarities “attract” and the “Friction Plates” hold
the motor stationary. When 24 VDC is sent to
the Brake, two “like” magnetic polarities are
created, causing the friction plates to “repel”
each other and “disengage” the Brake. The
Brake is used to hold the motor stationary when
the machine is not cycling. It is not used in a
normal “cycle stop.”
RESOLVER FEEDBACK SYSTEM: Each Servo
Motor has a built in Resolver System that sends
speed, direction, and motor position signals to
one of the Motion Control Modules. Some of the
Servo Motors communicate directly with the
Motion Controller and others are routed through
a Feedback Hub that sends Resolver Feedback
signals from up to 5 Servo Motors at once.
Some of the Servo Motors are not manufactured
by Siemens and require a Feedback Converter
Module to convert these signals to a format that
the Motion Control Modules can use.
ILLUSTRATION 62
SERVO MOTOR
POWER CABLE
RESOLVERSERVO
MOTOR
RESOLVER
CABLE
To Next Page
Loading...