3-arm Brackets Controlled by Depth

Normally, the geometry of the bracket is primarily controlled by the length of the arms, either explicitly given or calculated automatically.

However, for 3-arm brackets it is in certain cases more convenient to let the bracket size be controlled by the depth of the bracket.

Typical examples:

In most cases the free side should be parallel to the "base" of the bracket and the length of the edges should be adjusted automatically accordingly. There is an option to control the bracket size by the depth in these cases.

But then there is a possible conflict between the given depth, the arm lengths and the toe definition if all of them are given. Such a conflict is solved according to the following scheme:

• If arm lengths (A and/or B) are explicitly given (or calculated by connection for example, to a connecting profile as in the bracket to the right) they will always be kept.

  • If in such a case the toe type is of type 3 (as in the image referred to above) the toe length (<toel> in the image above) will be calculated to fit (thus overriding any toe length of the set-up or as explicitly given)

  • If the toe type should be of type 12 (tight connection) as in the right bracket both the arm length and the toe length will have been calculated automatically and the radius of the toe (R in the image above) will be adjusted to fit, thus overriding any given toe radius (either part of the set-up or explicitly given).

• If the arm length is not given (when the length is free as in the left bracket above) then the arm length is calculated from the depth and the toe length (given as part of the bracket set-up or explicitly given).

The option to generate 3-arm brackets using depth is available in syntaxes 2, 3 and 7 (see the following syntax topics).