romubricoltout Technical Information Stirling Engines: How They Work (Non Technical Terms) Graphic courtesy of Dr. Israel Urieli of Ohio University. The engine estimate derived from the Beale equation is shown below. The results obtained suggest an initial configuration of a two cylinder alpha engine of 185 cubic centimeters swept volume operating at 1000 RPM with an average internal pressure of 147 psi. Tutorial on the Rotary or Swing Arm Voice Coil Actuator used on modern Hard Disk Robert Thibadeau, Ph.D. Another Saturday Afternoon on the Internet Borrowed Heavily from The Voice Coil Actuator A Voice Coil Actuator is a very simple positioning device that utilizes a coil of wire in a permanent magnetic field. The hard disk voice coil actuator is used to position disk heads across the platter of the disk. The voice coil actuator looks like this: A big question! The "steel poles" (blue in diagram below is the nickel plated iron container) and "magnets" (red) create a captured magnet field (through the iron) but between the magnets the lines of flux are nearly vertical. Or, simpler still, the wire gets pushed to the left or right depending on whether the north pole is on the top or bottom and which direction the current is coming: Figure 1. Want more detail? Now: from : Positioning the Head using the Rotary Voice Coil Actuator Fig 2.
Body Theory & Practice of Electromagnetic Design of DC Motors & Actuators George P. Gogue & Joseph J. Stupak, Jr. G2 Consulting, Beaverton, OR 97007 A number of different types of magnetic device are commonly called actuators. (1) Voice-coil actuators and swing-arm actuators (2) Solenoids and related devices (3) Linear multiphase motors (4) Other types 11.1 Voice coil and swing-arm actuators: 11.1.1 Introduction: Voice-coil actuators are a special form of electric motor, capable of moving an inertial load at extremely high accelerations (more than 20 times the rate of acceleration of gravity "g" at the Earth's surface) and relocating it to an accuracy of millionths of an inch over a limited range of travel. Most voice-coil actuators are used in high-performance computer peripheral memories ("Winchester" drives) but they are also found in shaker tables, medical equipment, high-speed lens focusing applications, laser tools, servo valves, instruments, and elsewhere. 11.1.2 Basic principles: . ) and ( If:
Pedagogie - Diagnostic d'un vehicule (systeme pilote par calculateur) données de base (source Bosch) - la sonde lambda (source AutoVolt) contrôle des sondes lambdasystème de sondes lambda Hotwires - la sonde lambda proportionnelle NTK de NGK voir contrôle antipollution retour Données de base (source Bosch) La sonde lambda (source AutoVolt, 1.1992) Contrôle des sondes lambda (W Schmidt, Elektor, 7.1996) Model 2 Software - Fab @ Home From Fab @ Home (Redirected from Fab@Home:Software ) The Model 2 separates print planning software from printer control software. This distinction will allow for greater flexibility moving forward. Two options are available for print planning: FabStudio is capable of converting one or more STL or AMF files into printable paths, generating a FAB file ; svg2fab is a bare-bones utility that outputs a FAB file from a vectorized graphics image (SVG). FabInterpreter controls the printer and uses the information in the FAB file to print the object. FabStudio is open-source software created for the Fab@Home 3D Printer project. FabStudio v2.0.1 The release of FabStudio v2.0.1 is completely cross-platform, running on Windows, Mac OS and Unix-based operating systems. Usage FabStudio automatically detects STL (in both binary and ASCII encoding) and AMF models in its program directory and makes them available for placement in the interface's workspace. Edit Objects Materials Print Scene Final Steps
Fab@Home:Assembly Tips - Fab @ Home From Fab @ Home Welcome to the Fab@Home Assembly Tips Page On this page you will find hints, tips, and tricks to make assembly of your fabber easier, and to improve the quality of your completed fabber. Threaded Inserts for Thermoplastics Both the Model 1 and the Model 2 use threaded brass thermoplastic inserts to put strong threads into the acrylic parts for bolting parts together. These inserts need to be "melted" into the acrylic, using a soldering iron. Try to screw in a bolt after melting the inserts into the acrylic. - The threaded brass inserts have a slightly tapered shape (right) to guide it into the hole. - The inserts should fit slightly into the appropriate holes. - Hold or clamp the part such that the hole for the insert is overhanging the edge of your workbench, and insert the tip of a soldering iron into the insert. - Use pressure from the soldering iron to push the insert into the acrylic part. Depending on your soldering iron, the brass insert may get lodged onto the tip.
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