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Page: Glossary V-Z

Safety Glossary



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)

:  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.


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)


ZERO POSITION :  The configuration at which all principal joint displacements equal zero.  (R15.07)  



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Safety Light Curtains
   Safety Light Curtain Comparison
   Model SS Solid State Outputs Safety Light Curtain
   Model SS Product Overview
   Model SS Blanking Options
   Model SS Safety Relay
   Model SS Specs and Dimensions
   Model SS Ordering Procedure
   Model SS Accessories
   Model MG Metal Box Controller and Safety Light Curtain
   Model MG Product Overview
   Model MG Smart Controller
   Model MG Design Criteria
   Model MG Features
   Model MG Dimensions
   Model MG Blanking Options
   Model MG Ordering Procedure
   Model MG Accessories
   Model MG Ethernet Option
   Model DR DIN-rail Controller and Safety Light Curtain
   Model DR Product Overview
   Model DR Smart Controller
   Model DR Design Criteria
   Model DR Features
   Model DR Dimensions
   Model DR Blanking Options
   Model DR Ordering Procedure
   Model DR Accessories
   Model CE Solid State Outputs Global Safety Light Curtain
   Model CE Product Overview
   Model CE Blanking Options
   Model CE Safety Relay
   Model CE Specs and Dimensions
   Model CE Ordering Procedure
   Model CE Accessories
   Model CA Cascading Safety Light Curtain
   Model CA Product Overview
   Model CA Blanking Options
   Model CA Safety Relay
   Model CA Specs and Dimensions
   Model CA Ordering/Pricing Procedure
   Model CA Accessories
   Model PPG Perimeter Guarding
   Model PPG Product Overview
   Model PPG Dimensions
   Model PPG Ordering Procedure
   Model PPG Accessories
Safety Mat Systems
   NSD Safety Mat System
   NSD Product Overview
   NSD No Steel Electrodes?
   NSD Mat Controllers
   NSD Layout Procedure
   NSD Trim Kits
   NSD Ordering Procedure
   NSD Sizing Your System
   NSD Wiring Options
   NSD Safety Modules
   STTS Safety Mat System
   STTS Product Overview
   STTS Design Criteria
   STTS Mat Controllers
   STTS Controller Dimensions
   STTS Layout Procedure
   STTS Trim Kits
   STTS Ordering Procedure
   STTS Sizing Your System
   Direction of Travel Mats
   High-Temp Welding Mats
Ergonomic Palm Buttons
   UltraTouch Product Overview
   What can UltraTouch do for you?
   UltraTouch Benefits
   Ergonomic Palm Button Comparison
   UltraTouch Specifications
   UltraTouch Dimensions
   UltraTouch Models Available
   UltraTouch Ordering Procedure and Finding a Part Number
   UltraTouch Accessories
Programmable Safety Controller
Safety Interlock Switches
   GKM Series
   GKN Series
   GKE Series
   GK Series
   GKR/GKL Series
   GSS Series
   1CPS Series
   2CPS Series
   BX Series
   GSX Series
   CLSX Series
   Stack Lights Product Overview
   Stack Lights Ordering Procedure
   Stack Lights Dimensions
   Stack Lights Specifications
   Stack Lights Wiring Diagrams
   Stack Lights Accessories
   Stack Lights Accessories Mounting Poles
   Stack Lights Accessories Mounting Bases
   Stack Lights Wall Accessories Mount Brackets
   Fencing Overview
   Fencing Specifications
   Fencing Styles
   Complies with Safety Standards
   OSHA Table 0-10
   Fencing Warranty
   Proposal Request
E-Stops & Stack Lights
Metal Stamping / Pressroom Products
   Press Control Design Criteria
   Punch Press Clutch/Brake Controls
   Press Automation
   Die Protection
   Tonnage Monitoring
   Programmable Limit Switches
   Time-Based Brake Monitors
Safety Glossary
   Glossary A-C
   Glossary D-F
   Glossary G-I
   Glossary J-L
   Glossary M-O
   Glossary P-R
   Glossary S-U
   Glossary V-Z
Risk Assessment
Repair of Products
Corporate Profile
Standards and Regulations
   Appendix A
   Appendix B
   Appendix C
   Appendix D
   ISO and IEC Standards
   What Does OSHA Do?
   Domestic and International Standards Organizations
   OSHA Concept and Techniques of Machine Guarding

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