Instruction Manual

Glossary 17-3
LRHC: Lower-Right-Hand-Corner
Material Safety Data Sheet (MSDS):
Information for the safe use of materials.
Generally included in the fluid packaging.
Message Areas: In a Windows program, these
are windows or boxes that contain information for
the operator.
Micro-Pots: Dispensing technique for filling
divots or voids on the substrate or part.
Mil: One thousandth of an inch.
Model Window: The area defined as the fiducial
when using the Model Finder method of fiducial
definition.
Multipass Pattern: A pattern that re-uses one set
of fiducials to repeat the same pattern at one or
more locations on the workpiece.
Needle Heater: Consists of a temperature
controller and a heater element attachment that
heat the dispensing needle.
Needle Sensor: A sensor located near the
dispensing area that records the XYZ location of
the needle tip.
Needle Sensor Substrate: A ceramic pad placed
on the needle sensor and dispensed on during
needle location definition routines.
Non-Recoverable Interlock Condition: You
must completely exit the dispensing software
program, restart the dispensing software and re-
open the program to continue.
Notepad: A Microsoft Windows accessory
software application that can be used to read
.TXT files, such as the SPC files compiled during
Event Logging.
Offset Camera: Locates XYZ dispensing
coordinates offset from the dispensing needle.
Operator: A person running pre-programmed
dispensing systems and performing routine
maintenance.
Opto-Coupled: An electrical device that uses
light to send information.
Outputs: Electrical signals to control devices that
must turn On and Off on command.
Pattern: A command or set of commands that use
fiducials for dispensing lines, dots, etc.
Photodiode Array Pair: Optical sensors (Sender
and Receiver) that stop machine motion when the
light beam is interrupted.
PID: Proportional Integral and Derivative.
Pixels: The smallest unit of graphical data
appearing on a computer monitor. A pixel usually
consists of color and brightness information.
PLC: Programmable Logic Controller. Controls
all vacuum system elements (Auto Mode or
Manual Mode) and the conveyor (Auto Mode).
Pneumatic Devices: Air pressure actuated
devices such as: stop pins, clamp bars and lifter
tables.
Port: Any machine connection that allows for the
exchange of electrical communication signals.
Positive Displacement Pump: The dispensing
fluid is forced into a pumping chamber or cylinder
and then forced out through the dispensing tip by
a piston.
Post-Dispense Zone: The part of the dispensing
area where a part is held after it leaves the
dispense zone and before the part leaves the
system. The part may be heated in the post-
dispense zone, but no dispensing is performed.
Pot Life: The period of time that an epoxy is
usable once thawed.
Pre-Dispense Zone: The part of the dispensing
area where a part is held before entering the
dispense zone. The part may be heated in the pre-
dispense zone, but no dispensing is performed.
Process Engineer: A technical level position.
The Process Engineer designs and develops
processes for automated electronic packaging
using production line equipment.
Production Operator: A non-technical level
position. The production operator monitors and
operates pre-programmed dispensing systems
during production runs and performs minor
routine maintenance.
Production Shutdown: When all dispensing has
stopped.
Psi: Pressure measured in pounds per square inch
(lbs/in
2
).
Pump Motor Ratio: The ratio of the number of
teeth on the motor gear to the number of teeth on
the feed screw gear.
Purge Station: A location on the dispensing
system where a suction is applied to the needle tip
forcing the fluid to flow. A plastic cup inside of
the purge station catches the fluid.
PWB: Printed Wiring Board.