VARIANT Statement

TOL

defines a tolerance, used in judging whether the surfaces of the involved plates coincide or not. If the difference in position is smaller than or equal to <tol> then they are supposed to coincide.

Default value: 0.5 mm

LIM

The difference in the thicknesses of the plates to be joined by a certain butt bevel type may call for a chamfer in the thicker plate. However, the allowable difference may be different for thin and thick plates.

LIM is the 'limit thickness' above and below which the different tolerance values should be used (cf. <diff_gt> and <diff_lt> in the OPEN and SQUARE attributes). It is the thickness of the thinner of the two involved plates that should be used in the check.

Default value: 10 mm

OPEN

This attribute is used to define the two differences (to be used when the plate thickness >LIM and <=LIM, respectively) against which a check should be made for chamfer on the "open" side of bevels, that means, for both sides of X-bevels and on the open side of V- and Y-bevels.

If only one value is given this is supposed to be valid independent of LIM.

Default values:

<diff_lt> = 3 mm
<diff_gt> = 5 mm

Example:

Suppose that the default values are used and that the plate thicknesses are 12 and 16 mm. The difference is 4 mm. Since the thinner plate (12 mm) is thicker than the limit (10 mm) comparison should be made to the greater tolerance value (=5). Since 4 < 5, select a variant without chamfer.

Changing the plate thicknesses to 9 and 13, that means, keeping the difference, would result in a variant with chamfer, since comparison should be made with the tolerance for thinner plates (=3).

SQUARE

Corresponding to OPEN but valid for both sides of square butts and the negative side of V- and Y-bevels.

Default values: <diff_lt>= <diff_gt> = 3 mm