Glossary G-5
Syringe: A reservoir containing the dispensing fluid
that is usually attached to the Dispensing Valve.
Tactile Sensor: A sensor located adjacent to the Needle
Sensor that is used to calculate the Z-axis offset between
the Height Sensor probe and dispensing needle tip.
Tooling Air Regulator and Gauge: The Tooling Air
Regulator and Gauge controls air pressure for Stop Pins
and Lift Tables/Bar Clamps.
Underfill: The process of flowing epoxy underneath a
flip chip on a PWB to completely seal the solder bumps.
V: Abbreviation for volt as in VAC (Volts Alternating
Current). See also AC, DC.
Valve Air Pressure Regulator and Gauge: The Valve
Air Pressure Regulator and Gauge set controls the air
pressure that actuates some Dispensing Valves
(DV-7000, DV-8000, and DP-3000) during dispensing.
Valve: See Dispensing Valve.
Viscosity: Viscosity is a measurement of the flow
properties of a fluid. High viscosity fluids have a high
resistance to flow and low viscosity fluids have a
low resistance.
Vision Card: Computer card that receives video signals
from the Camera and performs fiducial image capture.
Vision System: Includes the camera, light source,
computer hardware and software, and the monitor.
Water Trap: The facility air supply may contain
moisture that can damage the dispensing system. The
water trap condenses this moisture before it enters the
dispenser pneumatic system.
Workpiece: Any surface, part, or element (usually a
PWB) that is being dispensed upon. Workpieces may be
installed in a carrier such as a lead frame or Auer boat.
X-Axis: Left to right movement of the Dispensing Head
in the dispensing chamber.
X-Beam: The apparatus that spans the width of the
dispensing chamber. The Dispensing Head is mounted
to the X-Beam and slides along it in the X-Axis.
Includes mechanical pulleys for the X-Axis cables.
Y-Axis: Forward and backward movement of the
Dispensing Head in the dispensing chamber.
Z-Axis: Up and down movement of the Dispensing
Head in the dispensing chamber.
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