Type or paste a DOI name into the text box. Click Go. Your browser will take you to a Web page URL associated with that DOI name. Send questions or comments to doi. NIST Menu. Topics Expand or Collapse. Advanced Communications Bioscience Buildings and Construction. As data volumes double every 12 months, the pace of change is accelerating for the cloud and network technologies needed to keep up. Next generation 5G communication. Durango Interferometry Software is ideal for interferogram data acquisition, analysis, exchange, importexport and simulation. Free download. Some lab experiments must be performed using any circuit simulation software e. PSPICE. BACHELOR OF TECHNOLOGY Electrical Electronics Engineering. A fully automated, fast and accurate system for precision optics measurement Easy setup, test and analysis for single or multiple parts. This book is intended as a modern physics text for science majors and engineering students who have already completed an introductory calculusbased. Measurement Services Commercial Services National Physical Laboratory. The standards maintained by NPL provide the UK reference for humid air mixing ratio, dew point, relative humidity and related quantities. ZMXLLC/media/images/Knowledgebase/Exploring-Non-Sequential-Mode-in-Zemax/interferometer_detviewer2.png' alt='Interferometer Simulation Software' title='Interferometer Simulation Software' />These humidity calibrations provide measurement traceability to sectors such as pharmaceuticals, medical devices, electronics, instrumentation, power generation, telecommunications and precision engineering, as well as for general calibration and testing laboratories. Html Css Contact Form Free Download. NPL can calibrate diverse humidity instruments, including relative humidity sensors, dew point hygrometers, psychrometers, spectrometers, humidity generators, climatic chambers and others. Calibrations of air temperature sensors are also provided. Mobile facilities enable NPL to carry out humidity calibrations or measurements at customer premises. We continue to develop and extend our capabilities according to demand. NPL also provides a highly regarded humidity training course humidity measurement advice and consultancy in depth measurement studies and design and construction of humidity generators. Find out more about NPLs Humidity research. Customer Service tel 4. E mail humidityenquiriesnpl. Northwood Technologies. Northwood Core Technologies. American Iron. American Iron means that each machine starts with thousands of pounds of tubular steel weldment skirted with steel plating. This gives Northwood rigidity and strength that other manufactures cant supply. Learn more. High Precision Linear Guide Rail System. Northwood starts with precision machined rail beds before any assembly begins. From there, each rail is verified using high tech laser metrology. Northwood then applies linear compensation to ensure repeatability and accuracy throughout the motion of the machine. Precision Ground CNC Ballscrews. The ballscrew systems that Northwood has chosen are proven to produce the accuracy needed long into the future. The ballscrews are driven directly through the FANUC servo motors using both turning nut and turning screw methods depending on the application. Northwood also protects the ballscrew with heavy duty bellow systems to ensure reliability. Cast Iron Integrated Drive. Northwood has developed an integrates cast iron drive casting that houses the FANUC servo and the ground ballnut allow for precision alignment of the servo and turning ball nut. Quality Components. Northwood has long stand relationships with the top component manufacturers for all of its machine components. This means that the brands trusted by Northwood are the brands trusted and respected throughout the industry. These top quality components are readily available to support Northwood CNC Machining Centers. Third Party Integration Compatible. With a large machine installation base throughout many industries, we have integrated our equipment with the majority of third party solution providers. Renishaw, Heidenhain, Z Corp, Z Laser, Slab. Ccie Voice Books. Smith, Proliner, LT 5. High Tec Industrial HTI and Applied Automation Technologies are several companies who have created specific packages designed for our equipment. Service, Support and World Class Training. Due to the modular design of Northwoods equipment, spare parts are readily available from our Louisville, KY facility located within minutes of the UPS Overnight Headquarters. Our technical support staff is feared towards keeping your productive and solving issues in a quick and courteous fashion. In accordance with our quick to production philosophy, training and implementation is completed on site by our veteran application staff. Northwood Metrologoy. All Northwood CNC Machining centers are tested, verified and compensated using a laser interferometer. When necessary, the Faro Tracker is used to verify rotary axes and 3. D or volumetric positioning accuracy. Northwoods metrology department also includes high precision digital levels, precision ground tram bars, wireless Renishaw Ballbar, and indicators that are capable of compensating the machine to provide a high level of accuracy and precision. Axis Advanced Technologies. Head Configuration. Northwoods 3 Axis TA CNC Machining Centers start with a single tooling plate and typically one spindle unit. Spindles range up to 2. HP liquid cooled spindles and and as many as four 4 on a single tooling plate. Machines can feature multiple tooling plates that allow for dual processing. Dual Processing allows for simultaneous machining on separate tables of two different or unique parts. Besides spindles or routers, Northwood can accommodate just about any other tool needed for any industry. This includes 3. 60 degree programmable saws, horizontal routers, large vertical drilling units 4 line, 1. HP Fanuc Drive Milling spindle for aluminum and other high torque, lower RPM applications and many other tools. Northwood has standard modules of each of these tooling options that can be adapted for any machine. A custom tooling plate or dual custom tooling plates with independent X horizontal, Z vertical and U horizontal, W vertical axes are commonly available from Northwood. Since Northwood doesnt just build a single head router, the head configuration can vary greatly on every machine. Custom Head Configuration Machining Centers. Roller Hold Down Machine part nests with smaller parts when vacuum flow through is not enoughThree Axis Single or Dual Table Vacuum flow through, part location stops, 2. Tool Changers. Northwood has Automatic Tool Changers that range from 8 positions up to 2. These tool changers can be mounted to the spindle tooling plate to provide dynamic and efficient tool changes or can be mounted to the bridge in a static location. The advantage of the travel along or dynamic tool changer is that tool change cycles are minimized, however for machines with narrow center spacing between multiple spindles, the tool changer increases the minimum spindle spacing. As Northwood understands each industry, they can recommend the best tool changer for your application. Dynamic and Static Tool Changing Machining Centers. Roller Hold Down Machine part nests with smaller parts when vacuum flow through is not enough Three Axis Single or Dual Table Vacuum flow through, part location stops, 2. Adjustable Spindle Center Spacing. When a single tooling plate holds multiples spindles, Northwood can provide horizontal axes for adjusting the spindle center spacing. This can be done via a manual center adjustment or via a servo controlled programmable axis via the CNC. Northwood commonly features 4 spindle with servo adjustment center spacing for applications that need spacing ranging from 1. Adjustable Spindle Center Spacing Machining Centers. Roller Hold Down Machine part nests with smaller parts when vacuum flow through is not enoughThree Axis Single or Dual Table Vacuum flow through, part location stops, 2. Machine Worktables. Northwood Machining Centers Commonly feature cast aluminum vacuum plenum worktables with high flow for superior part holding. Other options include matrix worktables, flat face milled cast aluminum worktables for custom fixtures and each cast iron T Slot worktables. Whatever the application demands, Northwood has a worktable to accommodate the proper fixture and part holding. Worktables designed for your application are available on Roller Hold Down Machine part nests with smaller parts when vacuum flow through is not enough Three Axis Single or Dual Table Vacuum flow through, part location stops, 2. Programmable Part Location Stops. Part location pins or stops are common on all Northwood Moving Table CNC Machining Centers. These allow operator to quickly locate parts in the X and Y axes to begin machining cycles. Programmable part location stops are available on Roller Hold Down Machine part nests with smaller parts when vacuum flow through is not enough Three Axis Single or Dual Table Vacuum flow through, part location stops, 2. Roller Hold Down. For applications that demand holding small parts within plywood or other nests, Northwood provides a unique Quad Power Roller Hold Down System that can accommodate stacking material up to 3 sheets for multi up part processing. Rollers ensure the parts are held down and that the nest does not move while machining. For more information, check out our Roller Hold Down page Dual Processing CNC Machine. Dual processing CNC machines feature dual worktables and dual tooling plates that can work independently of each other. This process increases throughout and allows for long set up times to take place on one side, while the other side of the machine begins its cycle.