# block tolerance command

Syntax

block tolerance f <keyword f >

Primary keywords:

Sets general model tolerance. It is used for:

1. minimum distance between gridpoints;
2. tolerance to link gridpoints of joined blocks; and
3. tolerance to select vertices close to the common plane.

The default is 0.12% of the average model dimensions in $$x$$, $$y$$ and $$z$$. Additional tolerances may be set with the keywords below.

angle f

Set the minimum edge angle allowed for a block cut. (The default is 1º.)

edge f

Set the minimum edge length for a polygon to f. If f is too large compared to the block size, then concave shapes may result. If value is too small, timesteps for deformable blocks can be too small. The default is 0.12% of the average problem dimension.

gap f

Set the gap tolerance used in the creation of subcontacts. Subcontacts will be created if the gap between blocks is less than f times the block dimension. The default is 0.01.

planarity f

Set the tolerance used by the cutting logic to determine whether nonplanar cuts are to be made. The tolerance is a multiple of the value supplied with block tolerance (default value is 0.1).