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Chain dimensioning involves placing dimensions in a linear sequence, where each dimension is referenced from the previous one, which can lead to cumulative tolerances and potential inaccuracies. In contrast, datum dimensioning establishes a reference point or surface (datum) from which all other dimensions are measured, ensuring consistency and precision across the entire part. This method reduces the accumulation of tolerances and enhances the reliability of the dimensions. Overall, datum dimensioning is generally preferred for critical applications where accuracy is paramount.
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What is the difference between datum dimensioning and chain dimensioning?
Datum dimensioning is where a single reference point is used for all dimensions in a single direction. E.g. If Point A is declared the reference point, then Points B, C, D, etc, will all be measured relative to Point A, not to each other. Chain dimensioning is where each point is measured to the next. E.g. Point B is measured from Point A, Point C is measured from Point B, Point C is measured from Point B, and so on. The problem with chain dimensioning is that each measurement relies on the accuracy of the previous measurement. If there is a tolerance associated with each measurement (+/- X), then the tolerance for each subsequent dimension accumulates and becomes the number of measurements times the tolerance of each measurement (+/- n*X). Since datum dimensioning uses only one reference point, the tolerances cannot accumulate as each measurement is isolated, rather than relying on the accuracy of the previous measurement. Common practice is to only use datum dimensioning in design drawings to ensure greater accuracy over the entire design without requiring tighter tolerances.
Which demensioning method permits the accumulation of errors and should be avoided?
The dimensioning method that permits the accumulation of errors and should be avoided is the "chain dimensioning" method. In this approach, dimensions are measured from a common baseline, leading to potential cumulative errors as each measurement relies on the previous one. Any inaccuracies in earlier dimensions can propagate through the entire assembly, resulting in significant discrepancies. Instead, "baseline dimensioning" or "coordinate dimensioning" methods, which minimize error propagation, are preferred for accuracy.
What is the difference between A557 chain and CA557 chain?
A557 chain has a curved profile on the link sides. CA557 chain has straight profile on the link sides. Look at Allied-Locke document Catalog 39 to see the differences in link plate profiles.
What is the difference between a polygon and a polyhedron?
polyhedron is often defined as a geometric object with flat faces and straight edges polygon is traditionally a plane figure that is bounded by a closed path or circuit, composed of a finite sequence of straight line segments (i.e., by a closed polygonal chain). .
What does the numbers on a chainsaw bar mean?
The numbers on a chainsaw bar typically indicate the length of the bar and the chain pitch. The length, measured in inches, represents the distance from the tip of the bar to where it attaches to the saw. The chain pitch, usually expressed in inches, refers to the distance between the drive links on the chain. Together, these numbers help users select the correct bar and chain for their specific chainsaw model and cutting needs.
What is chain dimensioning?
It show dimension of given dig. Ex. length meter etc. > chain dimensioning as opposed to datum dimensioning. chain dimensioning: 4 holes in line on a drawing, first hole position dimensioned from the edge, remainder dimensioned from the centre of the previous hole. datum dimensioning: all holes dimensioned from the edge. the cumulative tolerance build up on the chain dimensioning allows for greater overall tolerance build up.
Difference between chain banking group banking?
Difference between chain banking group banking?
What is the difference between datum dimensioning and chain dimensioning?
Datum dimensioning is where a single reference point is used for all dimensions in a single direction. E.g. If Point A is declared the reference point, then Points B, C, D, etc, will all be measured relative to Point A, not to each other. Chain dimensioning is where each point is measured to the next. E.g. Point B is measured from Point A, Point C is measured from Point B, Point C is measured from Point B, and so on. The problem with chain dimensioning is that each measurement relies on the accuracy of the previous measurement. If there is a tolerance associated with each measurement (+/- X), then the tolerance for each subsequent dimension accumulates and becomes the number of measurements times the tolerance of each measurement (+/- n*X). Since datum dimensioning uses only one reference point, the tolerances cannot accumulate as each measurement is isolated, rather than relying on the accuracy of the previous measurement. Common practice is to only use datum dimensioning in design drawings to ensure greater accuracy over the entire design without requiring tighter tolerances.
What is the difference between chain printer and band printer?
The difference between a chain printer and a band printer is a chain printer has a chain that the characters are on and a band printer has a band for the characters.
What is the difference between sprocket and chain wheel?
Sprocket and chain and what?
What is the difference between food chain and web chain?
There isn't a big difference between the food chain and food web. This is just a different way of drawing out the same concept.
What is the difference between a mountain range and a mountain chain?
The difference between a mountain range and a mountain chain is that a mountain chain is a row of mountains and a mountain range is lots of mountains in one area.
What is the difference between a food chain and a web chain?
get back to your science assessment
What is the difference between boutique hotel and chain hotel?
The difference is a boutique hotel is more exclusive & private than a chain hotel.
What is a difference between a food chain and a food web?
the difference is that a food chain is smaller then a food web because a food web is more animals then a food chain
What is the difference between a timer chain and a timer belt?
chain in inside the engine and the belt is outside
What is the difference between hotel chain and hotel group?
hotel chain is owned by a group of owners
