Safety
Glossary
V-Z
V
VAC:
Volts AC.
VALIDATION OR VALIDATE: For PSDI safety systems
that an OSHA recognized third-party validation
organization.
VALVE: A device to control the flow of a gas or liquid.
(B-11 Definitions Manual)
VARIATION: Is the difference between the smallest
measured value and the largest measured value for a particular
setting and for constant values of the set quantities. With
mechanical devices, the specifications refer to the scale end
value. For electronic devices, the specifications refer
to the set time value.
VDC: Volts DC.
VITRIFIED BONDED WHEEL: An abrasive wheel bonded with
clay, glass, porcelain or related ceramic material. (B-11
Definitions Manual)
VOLUNTARY CERTIFICATION: Manufacturers must ensure
that their products meet all the relevant regulations.
Where these regulations do not require 'Mandatory
Certification', manufacturers often seek 'Voluntary
Certification' to assure themselves, potential customers and
authorities that their products do meet the requirements set by
law.
VUC: Volts Universal
AC/DC.
W
WARM FORMING
: The process where heating to a point
below the crystallization temperature is used to assist in
plastic deformation of materials.
WARM-UP DRIFT: The difference between the first
position after start-up (from a cold robot system condition)
and the first achieved position after reaching repeatability
stabilization. (R15.05-1)
WARM-UP PERIOD: The elapsed time (in minutes)
between the first cycle, after start-up from a "cold start"
condition of the robot system, and the cycle in which position
repeatability has achieved stabilization. (R15.05-1)
WARNING: A means used to call attention to a
hazard or unsafe work practice. (B-11 Definitions Manual)
WARNING SIGNAL: A signal that alerts the operator
to a dangerous condition requiring immediate action.
(R15.02)
WELDING PRESS: A mechanically powered machine that
positions parts for joining by means of resistance welding.
(B-11 Definitions Manual)
WINDING SLOT: A groove in a winding mandrel into which
the end of the strip is inserted. (B-11 Definitions Manual)
WING DIE: With an upright compression bending machine,
the tooling mounted to the lower portion of the machine. (B-11
Definitions Manual)
WIPER DIE: With a rotary bending machine, the tooling
used to wrap material around the bending form while forming a
compression bend. (B-11 Definitions Manual)
WIPER SHOE: With a rotary bending machine, the tooling
used to fill the void behind the bending form die. (B-11
Definitions Manual)
WIRE TERMINATION
MACHINE
: Generally a bench-mounted, semi-automatic machine that
mechanically makes efficient electrical interconnections. (B-11
Definitions Manual)
WORKPIECE: Any material or part to be placed into the
[machine], for having work performed upon it. (B-11 Definitions
Manual)
WORKING SPACE: The space in which the robot has no
limitations in the movement of the mechanical interface other
than those imposed by the joints. (R15.05-1)
WORKING SPACE: The space which can be swept by the
wrist reference point added by the range of rotation or
translation of each joint in the wrist (secondary
axes). (ISO 8373)
WORKING SPACE CENTER POINT: The location in the
geometric center of the working space used to define the
location of the standard test path. (R15.05-1)
WORK STATION: On an ironworker, the areas on the machine
where punching, shearing, notching, coping or forming
operations are performed. (B-11 Definitions Manual)
WORLD COORDINATE SYSTEM: A fixed coordinate system
which serves as an absolute frame of reference. (R15.07)
WRIST REFERENCE POINT: The intersection point of
the two innermost secondary axes (i.e. those closest to
the primary axes), or if this does not exist, a specified point
on the innermost secondary axis. (ISO
8373)
Z
ZERO POSITION
: The configuration at which all principal joint
displacements equal zero. (R15.07)
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