Find the useful link for writing test in GD &T.
You will find it interesting and useful. Write your comments and suggestions through the box provided below
GD&T Test
Saturday, February 20, 2010
Wednesday, February 17, 2010
Learn This GD&T
Here is a link provided for you to download a free trial for learning GD&T .
Download this exe file and have an experience. Do let me know your comments after this.
If it is possible to have a full version , pl give me the link to make it visible to others
"The GD&T software"
Download this exe file and have an experience. Do let me know your comments after this.
If it is possible to have a full version , pl give me the link to make it visible to others
"The GD&T software"
Saturday, February 13, 2010
GD & T Definitions
Definitions:
Actual Size - Actual size is the measured size of the produced feature.
Angularity - Angularity is the condition of a surface, axis, or center plane, which is at a specified angle (other than 0, 90, 180 or 270 deg.) from a datum plane or axis. Symbol:
Basic Dimension - A basic dimension is a theoretically exact value used to describe the exact size, profile, orientation or location of a feature. A basic dimension should always associated with a feature control frame or datum target. Block tolerance does not apply and the applicable tolerance will be given within the feature control frame. Basic dimensions are enclosed within a box. Symbol:
Bilateral Tolerance - A bilateral tolerance is a tolerance in which variation is permitted in both directions from a specified nominal size or dimension (example +- .005).
Circularity - See Roundness.
Clearance Fit - A clearance fit is one having limits of size defined such that a clearance exists between mating parts when assembled.
Concentricity - Concentricity describes a condition in which two or more features (cylinders, cones, spheres, etc.) in any combination have a common axis. Measurement requirements for concentricity involves the complex task of mapping the referenced feature by way of opposed point measurements. A through understanding of the measurement process should be investigated before defining feature relationships using concentricity. Symbol:
Coaxial - Coaxial describes a condition where two or more features have the same axis or centerline.
Coordinate Dimension - (1) Either of two coordinates that locate a point on a plane and measured its distance from either of two intersecting straight-line axes along a line parallel to the other axis. (2) Any of three coordinates that locate a point in space and measure its distance from any of three intersecting coordinate planes measured to that one of three straight-line axes that is the intersection of the other two planes.
Coplanar - Coplanar describes a condition of two or more surfaces having all elements in the same plane.
Cylindricity - Cylindricity describes a condition of a surface of revolution in which all points of a surface are equidistant from a common axis.
Datum - Datum's are points, lines, planes, cylinders, axes, etc., from which the location or geometric relationship of other features may be established or related.
Datum Axis - the datum axis is the theoretically exact centerline of the datum cylinder as established by the extremities or contacting points of the actual datum feature cylindrical surface or the axis formed at the intersection of two datum planes.
Datum Feature - A datum feature is the actual surface component used to establish a datum.
Datum Line - A datum line is that which has length but no breadth or depth, such as, an intersection line of two planes, centerline or axis of holes or cylinders and/or reference line for functional tooling or gauging purposes.
Datum Point - A datum point is that which has position, but no extent; such as, the apex of a pyramid or cone, center point of a sphere or reference point on a surface for functional tooling or gauging purposes.
Datum Reference - A datum reference is a datum feature.
Datum Reference Plane - is a set of three mutually perpendicular datum planes or axis established from the simulated datum in contact with datum surfaces or features and used as a basis for dimensions for designs, manufacture, and inspection measurement.
Datum Simulator - A datum simulator a surface of adequate precision oriented to the high points of a designated datum from which the simulated datum is established. Examples: gage pin, block, surface of granite block.
Diameter Symbol - the diameter symbol indicates a circular feature when used on the field of a drawing or indicates that a defined tolerance is diametrical when used in a feature control frame.
Datum Target - is a specified point, line, or area on a part that is used to establish the Datum Reference Plane for manufacturing and inspection operations.
Dimension - A dimension is a numerical value expressed in appropriate units of measure and indicated on a drawing.
Feature - Features are specific component portions of a part and may include one or more surfaces, such, as holes, screw threads, profiles, faces or slots. Features may be individual or interrelated.
Feature of Size - One cylindrical or spherical surface, or a set of two plane parallel surfaces, each of which is associated with a size dimension.
Feature Control Frame - The feature control frame is a rectangular box containing the geometric characteristics symbol, spcified tolerance and datums references as required.
Fit - Fit is a general term used to signify the range of tightness or looseness which may result from the application of a specific combination of allowances and tolerance in the design of mating part features. Fits are of four general types: interference, transition, line and clearance.
Flatness - Flatness is the condition of a surface having all elements in one plane. Symbol:
Form Tolerance - A form tolerance states how far an actual surface is permitted to vary from desired geometric form. Expressions of these tolerances refer to limits of size, flatness, straightness, parallelism, perpendicularly, angularity, roundness, cylindricity, profile of a surface and profile of a line.
Free State Variations - Free state variation is a term used to describe the distortion of a part after removal of forces applied during manufacture or assembly.
Geometric Characteristics - Geometric characteristics refer to the basic elements or building blocks which form the language of geometric dimensioning and tolerancing. Generally, the term refers to all the symbols used in form, runout, profile and locational tolerancing.
Geometric Tolerance - The general term applied to the category of tolerances used to control form, profile, orientation, location, and runout.
Interference Fit - An interference fit is one having limits of size so prescribed that an interference will occurs when mating parts are assembled.
Least Material Condition - (LMC) - This term implies that the condition of a feature of size wherein it contains the least (minimum) amount of material for the stated limits of size; examples, largest hole size and smallest shaft size. It is the opposite materiasl condition to maximum material condition (MMC). Symbol:
Limit Dimensions - In limit dimensioning only the maximum and minimum dimensions are specified. When used with dimension lines, the high limit is placed over the low limit. When used with a leader line or note, the low limit precedes the high limit.
Limits of Size - The specified maximum and minimum size of a given feature.
Limits of Size Concept - The limits of size concept calls for perfect form at maximum material condition. Also called Rule #1.
Line to Line Fit - A line fit is one having limits of size so prescribed that surface contact or clearance may result when mating parts as assembled.
Location Tolerance - A location tolerance states how far or near a feature may vary from the perfect location implied by the drawing as related to datum's or other features. Expressions of these tolerances refer to the category of geometric characteristics containing position, concentricity, and symmetry.
Maximum Material Condition - (MMC) Maximum material condition is that condition of a part feature wherein it contains the maximum amount of material within the stated limits of size. That is: minimum hole size and maximum shaft size. Symbol:
Modifier - A modifier is the term used to describe the application of MMC and LMC.
Nominal Size - The nominal size is the stated designation which is used for the purpose of general identification, examples: 1.400, .050 .
Parallelism - Parallelism is the condition of a surface, line, or axis which is equidistant at all points from a datum plane or axis. Symbol:
Perpendicularity - Perpendicularity is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis. Symbol:
Position Tolerance - Position tolerance defines a zone within which the axis or center plane of a feature is permitted to vary from true (theoretically exact) position. Symbol:
Principle of Independency - This principle sets no limits to the number of errors of form possessed by individual features of a work piece.
Profile of a Line - Profile of a line is the condition permitting an amount of surface element variation ether unilaterally or bilaterally along a line element of a feature. Symbol:
Profile of a Surface - Profile of a surface is the condition permitting an amount of surface 3D variation ether unilaterally or bilaterally of a surface. Symbol:
Projected Tolerance Zone - A projected tolerance zone applies to a feature, such as pin, stud, screw, or similar. The projected tolerance zone is a tolerance boundary that extends above or beyond the surface of the part within which the controlling element of the feature must fall within - axis of a hole for example. Symbol:
Reference Dimension - A dimension, usually without tolerance that is used for information purposes only. It does not govern production or inspection operations. A reference dimension is a repeat of a dimension or is derived from other values on the drawing or related drawings. Symbology: (.250)
Regardless of Feature Size - (RFS) - This is the condition where the stated tolerance limits must be met irrespective of as built feature size or location.
Roundness - Roundness describes the condition on a surface of revolution (cylinder, cone, or sphere) where all points of the surface intersected by any plane are; (1) perpendicular to a common axis (cylinder, cone), (2) passing through a common center (sphere) are equidistant from the center. Symbol:
Runout, Circular - Runout, Circular is the composite deviation from the desired form of a part surface of revolution through one full rotation (360 deg) of the part on a datum axis. Symbol:
Runout Tolerance - Runout tolerance states how far an actual surface of a feature is permitted to deviate from the desired form implied by the drawing during one full rotation of the part on a datum axis.
Size Tolerance - A size tolerance states how far individual features may vary from the desired size. Size tolerances are specified with ether unilateral, bilateral or limit tolerance methods.
Specified Datum - A specified datum is a surface or feature identified with a datum identification symbol of note.
Squareness - See Perpendicularity.
Straightness - Straightness describes a condition where a line element of a surface, axis, or center plane is a straight line. Symbol:
Symmetry - Symmetry is a condition in which a feature (or features) are symmetrically disposed about the center plane of a datum feature.
Transition Fit - A transition fit is one having limits of size so prescribed that either a clearance or an interference may result when mating parts as assembled.
Total Runout - Total runout is the simultaneous composite control of all elements of a surface at all circular and profile measuring positions as the part is rotated through 360. Symbol:
Unilateral Tolerance - A unilateral tolerance is a tolerance in which variation is permitted only in one direction from the specified dimension, example, 1.400 +.000/ -.006.
Virtual Condition (Size) - The boundary generated by the collective effects of MMC, size limit of a feature and any associated geometric tolerance, virtual condition must be considered in determining the fit between mating parts. The term "virtual condition" is preferred over "virtual size."
Actual Size - Actual size is the measured size of the produced feature.
Angularity - Angularity is the condition of a surface, axis, or center plane, which is at a specified angle (other than 0, 90, 180 or 270 deg.) from a datum plane or axis. Symbol:
Basic Dimension - A basic dimension is a theoretically exact value used to describe the exact size, profile, orientation or location of a feature. A basic dimension should always associated with a feature control frame or datum target. Block tolerance does not apply and the applicable tolerance will be given within the feature control frame. Basic dimensions are enclosed within a box. Symbol:
Bilateral Tolerance - A bilateral tolerance is a tolerance in which variation is permitted in both directions from a specified nominal size or dimension (example +- .005).
Circularity - See Roundness.
Clearance Fit - A clearance fit is one having limits of size defined such that a clearance exists between mating parts when assembled.
Concentricity - Concentricity describes a condition in which two or more features (cylinders, cones, spheres, etc.) in any combination have a common axis. Measurement requirements for concentricity involves the complex task of mapping the referenced feature by way of opposed point measurements. A through understanding of the measurement process should be investigated before defining feature relationships using concentricity. Symbol:
Coaxial - Coaxial describes a condition where two or more features have the same axis or centerline.
Coordinate Dimension - (1) Either of two coordinates that locate a point on a plane and measured its distance from either of two intersecting straight-line axes along a line parallel to the other axis. (2) Any of three coordinates that locate a point in space and measure its distance from any of three intersecting coordinate planes measured to that one of three straight-line axes that is the intersection of the other two planes.
Coplanar - Coplanar describes a condition of two or more surfaces having all elements in the same plane.
Cylindricity - Cylindricity describes a condition of a surface of revolution in which all points of a surface are equidistant from a common axis.
Datum - Datum's are points, lines, planes, cylinders, axes, etc., from which the location or geometric relationship of other features may be established or related.
Datum Axis - the datum axis is the theoretically exact centerline of the datum cylinder as established by the extremities or contacting points of the actual datum feature cylindrical surface or the axis formed at the intersection of two datum planes.
Datum Feature - A datum feature is the actual surface component used to establish a datum.
Datum Line - A datum line is that which has length but no breadth or depth, such as, an intersection line of two planes, centerline or axis of holes or cylinders and/or reference line for functional tooling or gauging purposes.
Datum Point - A datum point is that which has position, but no extent; such as, the apex of a pyramid or cone, center point of a sphere or reference point on a surface for functional tooling or gauging purposes.
Datum Reference - A datum reference is a datum feature.
Datum Reference Plane - is a set of three mutually perpendicular datum planes or axis established from the simulated datum in contact with datum surfaces or features and used as a basis for dimensions for designs, manufacture, and inspection measurement.
Datum Simulator - A datum simulator a surface of adequate precision oriented to the high points of a designated datum from which the simulated datum is established. Examples: gage pin, block, surface of granite block.
Diameter Symbol - the diameter symbol indicates a circular feature when used on the field of a drawing or indicates that a defined tolerance is diametrical when used in a feature control frame.
Datum Target - is a specified point, line, or area on a part that is used to establish the Datum Reference Plane for manufacturing and inspection operations.
Dimension - A dimension is a numerical value expressed in appropriate units of measure and indicated on a drawing.
Feature - Features are specific component portions of a part and may include one or more surfaces, such, as holes, screw threads, profiles, faces or slots. Features may be individual or interrelated.
Feature of Size - One cylindrical or spherical surface, or a set of two plane parallel surfaces, each of which is associated with a size dimension.
Feature Control Frame - The feature control frame is a rectangular box containing the geometric characteristics symbol, spcified tolerance and datums references as required.
Fit - Fit is a general term used to signify the range of tightness or looseness which may result from the application of a specific combination of allowances and tolerance in the design of mating part features. Fits are of four general types: interference, transition, line and clearance.
Flatness - Flatness is the condition of a surface having all elements in one plane. Symbol:
Form Tolerance - A form tolerance states how far an actual surface is permitted to vary from desired geometric form. Expressions of these tolerances refer to limits of size, flatness, straightness, parallelism, perpendicularly, angularity, roundness, cylindricity, profile of a surface and profile of a line.
Free State Variations - Free state variation is a term used to describe the distortion of a part after removal of forces applied during manufacture or assembly.
Geometric Characteristics - Geometric characteristics refer to the basic elements or building blocks which form the language of geometric dimensioning and tolerancing. Generally, the term refers to all the symbols used in form, runout, profile and locational tolerancing.
Geometric Tolerance - The general term applied to the category of tolerances used to control form, profile, orientation, location, and runout.
Interference Fit - An interference fit is one having limits of size so prescribed that an interference will occurs when mating parts are assembled.
Least Material Condition - (LMC) - This term implies that the condition of a feature of size wherein it contains the least (minimum) amount of material for the stated limits of size; examples, largest hole size and smallest shaft size. It is the opposite materiasl condition to maximum material condition (MMC). Symbol:
Limit Dimensions - In limit dimensioning only the maximum and minimum dimensions are specified. When used with dimension lines, the high limit is placed over the low limit. When used with a leader line or note, the low limit precedes the high limit.
Limits of Size - The specified maximum and minimum size of a given feature.
Limits of Size Concept - The limits of size concept calls for perfect form at maximum material condition. Also called Rule #1.
Line to Line Fit - A line fit is one having limits of size so prescribed that surface contact or clearance may result when mating parts as assembled.
Location Tolerance - A location tolerance states how far or near a feature may vary from the perfect location implied by the drawing as related to datum's or other features. Expressions of these tolerances refer to the category of geometric characteristics containing position, concentricity, and symmetry.
Maximum Material Condition - (MMC) Maximum material condition is that condition of a part feature wherein it contains the maximum amount of material within the stated limits of size. That is: minimum hole size and maximum shaft size. Symbol:
Modifier - A modifier is the term used to describe the application of MMC and LMC.
Nominal Size - The nominal size is the stated designation which is used for the purpose of general identification, examples: 1.400, .050 .
Parallelism - Parallelism is the condition of a surface, line, or axis which is equidistant at all points from a datum plane or axis. Symbol:
Perpendicularity - Perpendicularity is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis. Symbol:
Position Tolerance - Position tolerance defines a zone within which the axis or center plane of a feature is permitted to vary from true (theoretically exact) position. Symbol:
Principle of Independency - This principle sets no limits to the number of errors of form possessed by individual features of a work piece.
Profile of a Line - Profile of a line is the condition permitting an amount of surface element variation ether unilaterally or bilaterally along a line element of a feature. Symbol:
Profile of a Surface - Profile of a surface is the condition permitting an amount of surface 3D variation ether unilaterally or bilaterally of a surface. Symbol:
Projected Tolerance Zone - A projected tolerance zone applies to a feature, such as pin, stud, screw, or similar. The projected tolerance zone is a tolerance boundary that extends above or beyond the surface of the part within which the controlling element of the feature must fall within - axis of a hole for example. Symbol:
Reference Dimension - A dimension, usually without tolerance that is used for information purposes only. It does not govern production or inspection operations. A reference dimension is a repeat of a dimension or is derived from other values on the drawing or related drawings. Symbology: (.250)
Regardless of Feature Size - (RFS) - This is the condition where the stated tolerance limits must be met irrespective of as built feature size or location.
Roundness - Roundness describes the condition on a surface of revolution (cylinder, cone, or sphere) where all points of the surface intersected by any plane are; (1) perpendicular to a common axis (cylinder, cone), (2) passing through a common center (sphere) are equidistant from the center. Symbol:
Runout, Circular - Runout, Circular is the composite deviation from the desired form of a part surface of revolution through one full rotation (360 deg) of the part on a datum axis. Symbol:
Runout Tolerance - Runout tolerance states how far an actual surface of a feature is permitted to deviate from the desired form implied by the drawing during one full rotation of the part on a datum axis.
Size Tolerance - A size tolerance states how far individual features may vary from the desired size. Size tolerances are specified with ether unilateral, bilateral or limit tolerance methods.
Specified Datum - A specified datum is a surface or feature identified with a datum identification symbol of note.
Squareness - See Perpendicularity.
Straightness - Straightness describes a condition where a line element of a surface, axis, or center plane is a straight line. Symbol:
Symmetry - Symmetry is a condition in which a feature (or features) are symmetrically disposed about the center plane of a datum feature.
Transition Fit - A transition fit is one having limits of size so prescribed that either a clearance or an interference may result when mating parts as assembled.
Total Runout - Total runout is the simultaneous composite control of all elements of a surface at all circular and profile measuring positions as the part is rotated through 360. Symbol:
Unilateral Tolerance - A unilateral tolerance is a tolerance in which variation is permitted only in one direction from the specified dimension, example, 1.400 +.000/ -.006.
Virtual Condition (Size) - The boundary generated by the collective effects of MMC, size limit of a feature and any associated geometric tolerance, virtual condition must be considered in determining the fit between mating parts. The term "virtual condition" is preferred over "virtual size."
Sunday, February 7, 2010
Mechanisms explained with sketches
Students of Post Graduate -Engg Design are directed to download the full content of the various mechanisms through the following link.
follow the link to download Mechanisms
follow the link to download Mechanisms
DFM syllabus
DESIGN FOR MANUFACTURE, ASSEMBLY AND ENVIRONMENTS
3 0 0 100
1. INTRODUCTION 5
General design principles for manufacturability - strength and mechanical factors, mechanisms selection, evaluation method, Process capability - Feature tolerances Geometric tolerances - Assembly limits -Datum features - Tolerance stacks.
2. FACTORS INFLUENCING FORM DESIGN 13
Working principle, Material, Manufacture, Design- Possible solutions - Materials choice - Influence of materials on form design - form design of welded members, forgings and castings.
3. COMPONENT DESIGN - MACHINING CONSIDERATION 8
Design features to facilitate machining - drills - milling cutters - keyways - Doweling procedures, counter sunk screws - Reduction of machined area- simplification by separation - simplification by amalgamation - Design for machinability - Design for economy - Design for clampability - Design for accessibility - Design for assembly.
4. COMPONENT DESIGN - CASTING CONSIDERATION 10
Redesign of castings based on Parting line considerations - Minimizing core requirements, machined holes, redesign of cast members to obviate cores.
Identification of uneconomical design - Modifying the design - group technology - Computer Applications for DFMA
5. DESIGN FOR THE ENVIRONMENT 9
Introduction – Environmental objectives – Global issues – Regional and local issues – Basic DFE methods – Design guide lines – Example application – Lifecycle assessment – Basic method – AT&T’s environmentally responsible product assessment - Weighted sum assessment method – Lifecycle assessment method – Techniques to reduce environmental impact – Design to minimize material usage – Design for disassembly – Design for recyclability – Design for remanufacture – Design for energy efficiency – Design to regulations and standards.
Total 45
3 0 0 100
1. INTRODUCTION 5
General design principles for manufacturability - strength and mechanical factors, mechanisms selection, evaluation method, Process capability - Feature tolerances Geometric tolerances - Assembly limits -Datum features - Tolerance stacks.
2. FACTORS INFLUENCING FORM DESIGN 13
Working principle, Material, Manufacture, Design- Possible solutions - Materials choice - Influence of materials on form design - form design of welded members, forgings and castings.
3. COMPONENT DESIGN - MACHINING CONSIDERATION 8
Design features to facilitate machining - drills - milling cutters - keyways - Doweling procedures, counter sunk screws - Reduction of machined area- simplification by separation - simplification by amalgamation - Design for machinability - Design for economy - Design for clampability - Design for accessibility - Design for assembly.
4. COMPONENT DESIGN - CASTING CONSIDERATION 10
Redesign of castings based on Parting line considerations - Minimizing core requirements, machined holes, redesign of cast members to obviate cores.
Identification of uneconomical design - Modifying the design - group technology - Computer Applications for DFMA
5. DESIGN FOR THE ENVIRONMENT 9
Introduction – Environmental objectives – Global issues – Regional and local issues – Basic DFE methods – Design guide lines – Example application – Lifecycle assessment – Basic method – AT&T’s environmentally responsible product assessment - Weighted sum assessment method – Lifecycle assessment method – Techniques to reduce environmental impact – Design to minimize material usage – Design for disassembly – Design for recyclability – Design for remanufacture – Design for energy efficiency – Design to regulations and standards.
Total 45
Mechanisms an introduction
Mechanisms an introduction
Introduction
A mechanism considered to be an assembly of mechanical items designed to achieve a specific purpose within a machine. There are clearly an infinite number of mechanisms available but the notes and links are concentrating on the specific ones as listed below.
Motion Control Using Computers
The notes below relate generally to mechanical methods for providing relative motion and forces. There is an increasing tendency to produce motions using servo hydraulic systems and stepping motors under the control of digital computers. Although the mechanism design often requires creativity and a high level of analysis the final product is often low priced and provides reliable, efficient, predictable performance. However a mechanism is generally made to perform a fixed operation, reliably and predictably. Computer controlled motions can be continuously monitored and if necessary modified. If the output motion is changed from a harmonic motion to a periodic square wave motion or a sawtooth motion then changing the control parameters for a computer controlled system is often very convenient. If a large number of systems have been developed then the cost of modifying the software or firmware is much less than modifying a large number of mechanisms..
Although the motions of many of high technology machines and computer systems are being controlled by computers. The need for mechanisms is also increasing in consumer goods e.g. mechanisms in consumer goods, toys, lifting equipment, vehicles, aircraft, industrial machines, gardening implements,etc etc etc... ......
Classification Of Mechanisms
There are many methods of classifying mechanisms. The following list is a functional list based on the type of motion required. This list is based on that provided in Theory of Machines and Mechanisms ..Uicker, Pennock, and Shigley. The notes below are low level descriptions. Additional notes will be included soon..
1. Snap-Action Mechanisms
2. Linear Actuators
3. Fine Adjustment Mechanisms
4. Clamping Mechanisms
5. Location Devices
6. Ratchets
7. Escapements
8. Indexing Mechanisms
9. Swinging or Rocking Mechanisms
10. Reciprocating Mechanisms
11. Reversing Mechanisms
12. Couplings and Connectors
13. Sliding Connectors
14. Stop Pause and Hesitation Mechanisms
15. Curve Generators
16. Straight Line generators
17. Tracing Mechanisms
Introduction
A mechanism considered to be an assembly of mechanical items designed to achieve a specific purpose within a machine. There are clearly an infinite number of mechanisms available but the notes and links are concentrating on the specific ones as listed below.
Motion Control Using Computers
The notes below relate generally to mechanical methods for providing relative motion and forces. There is an increasing tendency to produce motions using servo hydraulic systems and stepping motors under the control of digital computers. Although the mechanism design often requires creativity and a high level of analysis the final product is often low priced and provides reliable, efficient, predictable performance. However a mechanism is generally made to perform a fixed operation, reliably and predictably. Computer controlled motions can be continuously monitored and if necessary modified. If the output motion is changed from a harmonic motion to a periodic square wave motion or a sawtooth motion then changing the control parameters for a computer controlled system is often very convenient. If a large number of systems have been developed then the cost of modifying the software or firmware is much less than modifying a large number of mechanisms..
Although the motions of many of high technology machines and computer systems are being controlled by computers. The need for mechanisms is also increasing in consumer goods e.g. mechanisms in consumer goods, toys, lifting equipment, vehicles, aircraft, industrial machines, gardening implements,etc etc etc... ......
Classification Of Mechanisms
There are many methods of classifying mechanisms. The following list is a functional list based on the type of motion required. This list is based on that provided in Theory of Machines and Mechanisms ..Uicker, Pennock, and Shigley. The notes below are low level descriptions. Additional notes will be included soon..
1. Snap-Action Mechanisms
2. Linear Actuators
3. Fine Adjustment Mechanisms
4. Clamping Mechanisms
5. Location Devices
6. Ratchets
7. Escapements
8. Indexing Mechanisms
9. Swinging or Rocking Mechanisms
10. Reciprocating Mechanisms
11. Reversing Mechanisms
12. Couplings and Connectors
13. Sliding Connectors
14. Stop Pause and Hesitation Mechanisms
15. Curve Generators
16. Straight Line generators
17. Tracing Mechanisms
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