Installation Manual

7-16 Theory of Operations
Table 7-3 Dispensing Head X-axis or Y-axis Movement
Component Function
FmNT Software Commands Dispensing Head X-axis, Y-axis
movement.
PMAC Card 1. Receives FmNT command to move
Dispensing Head to a specific XY position.
2. Sends low-voltage direction and power level
output signals to the X and Y Servo
Amplifiers.
3. Receives feedback from:
• X and Y Linear Encoders (position)
• X and Y Rotary Encoders (velocity)
4. Calculates how much power should be
delivered to Servo Motors.
Main Interface PWA An intermediate step as information is
communicated between the PMAC Card and the
XY Servo Interface PWA.
XY Servo Interface PWA Relays PMAC signals to the X and Y Servo
Amplifiers.
X and Y Servo Amplifiers 1. Receive low-voltage motor direction and
power signals from the PMAC.
2. Amplify PMAC signals into high power level to
move the X and Y Servo Motors.
3. Receives and interprets Hall Sensor feedback
that indicates direction the motor is turning.
4. Regulates power to motor windings to cause
motor to move in the desired direction.
X and Y Servo Motors 1. Receive power from the X and Y Servo
Amplifiers.
2. Turn the cable pulleys to move the Dispensing
Head in the X and Y-axes.
X and Y Linear Encoders Supply Dispensing Head position information on a
constant basis to the PMAC.
X and Y Rotary Encoders Supply velocity and acceleration information to
the PMAC.
X and Y Hall Sensors Sense rotational directions of X and Y Servo
Motor windings and reports them to the X and Y
Servo Amplifiers.