Dimension,tolerance, assembly
Dimensioning
tolerance
superimposed running dimension
chain dimension
Parallel dimension
consists of dimensions from a common reference point
simplify parallel dimensions to reduce space used
to dimension small features, do like ->| |<- this
used only if function of object unaffected by accumulation of tolerances
combined dimension
both chain and parallel dimensioning
N x Dimension for multiple same dimensions
Circle dimensioned by diameter, arc by radius R, holes by centerlines, angles by curved dimensioned line with degree symbol
Assembly
Bilateral Tolerance
Unilateral Tolerance
Limit tolerance
upper and lower limits of dimensions are specified.
allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
only vary in one direction
formula: Upper limit-Lower limit
two joints focused on
Rigid Joint
Revolute Joint
Fixes two components to one another; it provides zero degrees of freedom.
Has a single rotational degree of freedom