Category

CNC

Defines the rounding factor of holes for NC files. NC files are accurate to 0.01 mm.

Use to round bolt diameters with very small differences in diameter to the same value. You may need to use different diameters because bolts can have different tolerance values in a Tekla Structures model. You can input more decimals into bolt tolerance values in the component dialog boxes than in the general bolt dialog box.

The rounding routine is used only when you create NC files.

Set the rounding factor the same value (in mm) as the drill tolerance of the machine tool. The default value is 0.00001.

Tekla Structures divides the original hole diameter by the rounding factor, then rounds the result to the nearest integer, then multiplies it by the rounding factor. As a result, bolt diameters with very small differences in diameter are now rounded to the same value.

This advanced option is model specific and the setting is saved in the options database.

Example

Here the rounding factor is 1.5875 (1/16 inch), which results in the following:

• Diameter 26.99 mm (1” 1/16 from component dialog box) => 26.99/1.5875 => 17.00 => 17 => 17*1.5875 => 26.99 mm

• Diameter 27.00 mm (1” 1/16 from bolt dialog box) => 27.00/1.5875 => 17.01 => 17 => 17*1.5875 => 26.99 mm