Precision Design Principles. 2. The Eleven Principles and Techniques for the Design of. High Precision Machines (McKeown, ). 1. Structure: symmetry. Precision Machine Design - Download as PDF File .pdf), Text File .txt) or read online. Precision Machine Design - Ebook download as PDF File .pdf) or read book online. precision mechanical, electrical. electronics, optical design of machinery.
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Precision Machine Design. Topic 2. Assessment of errors in precision machines. Purpose: This lecture defines types of errors and discusses methods for. All subsequent chapters cover specific aspects of precision machine design. The Precision Machine Design, and later encouraged Layton to. Precision Machine. Design. Alexander H. Slocum. Massachusetts Institute of There are many fine texts on the design of machine elements, and this book.
Active temperature control: Less reliance on manufacturing. As Elastically averaged design. Marketing was consulted how accurate must it be. What does the structural loop look like?
The motor is receiving running open loop.
Required static stiffness for a machine with N max. Dynamic stiffness: For high speed or high accuracy machines: Cast iron can have a damping factor of 0. Epoxy granite can have a damping factor of 0. Extreme care must be paid to dynamic performance see the next lecture on modal analysis. It is important to minimize thermal and elastic structural loops. Metrology frames and mapping techniques can be used to compensate for some structural deformation errors. It pays to make the design as good as possible before advanced techniques are applied.
Once the design detailing starts. Beware of the technology you are using. Ingersoll Milling Machine's octahedral hexapod Stewart platform. Closed frames Portal type. Elastically averaged design. Structural loop prone to Abbe errors like calipers! Moderately strong structural loop like a micrometer!
Easier to obtain common centers of mass. Viscous shear damping mechanisms built into the legs. Hollow sphere node L 2 6L 9 L Air bearing spindle Carbon fiber drive shaft with kinematic coupling to spindle and motor not shown Tubular strut Damping beams High viscosity oil interface Spindle block Solid film bearing interface L 6L 9 3L 6 3L 3 L Vee slideway with kinematically supported carriage Inherently stable shape.
Kevin Lindsey at NPL patented. High thermal stability. Concept developed by the late Dr.
Damping obtained at the leg joints by means of sliding bearing material applied to the self centering spherical joint. High stiffness. Bearing ways bolted to legs. Work zone in center of tetrahedron. The Inst. Part 1. Proceeding Damping is discussed in Topic Modest cost for modest sizes. Integral ways can be cast in place. Design rules are well established see text. Good damping and heat transfer.
Stable with thermal anneal. Linear guide rolling element bearing Integral way for sliding or hydrostatic bearing Inner regions for replicated internal viscous dampers shaped extruded aluminum. Round inner tube is structurally the most efficient section for resisting torsional loads.
Integral ways can be welded in place. Structures can be made from tubes and plates: Modest cost. Low damping. Linear guide rolling element bearing Integral way for sliding or hydrostatic bearing Inner regions for replicated internal viscous dampers.
Plates welded to inner tube through 50 mm x 10 mm access ports located every mm along the length of the column. Marketing was consulted how accurate must it be. Manufacturing was consulted what can they make. During the concept phase. Welded steel structure. Slocum At the start of the detailed design phase. Remember to use symmetry to avoid thermal warping. Polymer concrete does not diffuse heat as well as cast iron.
They can have much greater damping. Precision Machine Design Uploaded by nadjibwassim. Flag for inappropriate content. Related titles. Principles and Techniques for Design Precision Machine. Jump to Page.
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Precision machine design Close. Want to Read. Are you sure you want to remove Precision machine design from your list? Precision machine design by Alexander H. Written in English. Subjects Machine design. Edition Notes Includes bibliographical references and index.
Classifications Dewey Decimal Class S56 The Physical Object Pagination xv, p.