Geometrical dimensions (single part)

Dimension lines are positioned outside an element in the following order starting from the edge of a dimensioned element:

1. Elements located inside the dimensioned part
2. Drilled openings
3. Chamfers and cuts
4. Overall dimensions

This part of the dialog consists of 3 identical tabs on which the following parameters may be defined:

• Dimension format - for all dimensions generated automatically in a view, the following dimension settings are available:
  • Relative - chain - the program generates a complete dimension chain with standard (relative) dimensions
  • Absolute - chain - the program generates a dimension chain which begins in the reference point; dimensions are positioned on extension lines - a dimension value indicates the coordinate of a dimensioned point with respect to the reference point
  • Relative + absolute - chain - the program generates an accumulative dimension chain and on the dimension line provides real (relative) dimensions of segments between the dimensioned points
  • To base - each dimension is positioned on a separate dimension line attached to the reference point

Click Ref. point to open the Reference point dialog, where you can define an additional dimension point during generation of some dimensions (for example, absolute dimensions).

• Overall - these are the linear dimensions that display an overall size of a dimensioned part. These dimensions are generated if the option is selected, and they are always positioned along the horizontal or vertical axis (parallel to the plane of the element local coordinate system). Horizontal dimensions may be placed above or below the dimensioned element, and vertical dimensions are positioned to the left or to the right of the dimensioned element. It is possible to exclude horizontal and vertical dimensions from presentation. If Optimal is selected, the dimension line is positioned on this side where the longest edge of the dimensioned element is placed (so that extension lines on the edges do not need to be lengthened).
• Bevels and cuts - these dimensions concern all the discontinuances on element edges (corners, cuts, chamfers, and so on), but do not pertain to drilled openings. There are 3 dimension options:
  • Chain
    • all dimensions are displayed on the common dimension line
    • lines are always positioned along the vertical and horizontal axes
    • dimension lines are presented on this element side where a discontinuance is found - dimension lines are drawn to reach the most distant corners (edges) of an element - identically as for overall dimensions
  • From edge
    • each dimension is presented on a separate dimension line
    • successive dimensions show distances from the common point to successive characteristic points of an element
    • dimension lines are presented on this element side where a discontinuance is found
  • Aligned
    • each segment of a dimensioned element's edge is ascribed its own dimension line which is parallel to the dimensioned segment
    • in the case of arc segments, the chord is subjected to the dimensioning
• Internal recess - these are the linear dimensions of recesses included inside the element contour:
  • Inside part
    • dimension lines are drawn inside the contour of a dimensioned element
    • all dimensions are presented on one dimension line (dimension chain) - vertical or horizontal
    • the dimension line is extended to the closest edge of a dimensioned element
    • Outside part - dimension lines are drawn outside the dimensioned element (the same rules are applicable as in the case of bevels and cuts)
• Openings in view - these are the linear dimensions that indicate positions of drilled openings. Dimension points may be positioned at opening centers or at external points of the contour of a circle representing an opening; the Chain and From edge options are also available (as for bevels and cuts).
• Perpendicular openings - these are the linear dimensions that indicate positions of drilled openings located in the plane perpendicular to the projection plane. The same rules apply here as for openings in view; the Chain and From edge options are available (as for bevels and cuts).
• Angular - these are the dimensions displayed for the edges of a dimensioned element that are not parallel to the axes of the element local coordinate system
• line with respect to which the dimension is to be determined (with respect to horizontal or vertical line)
• value of the angular dimension expressed as: angle value or edge inclination

Define arc dimensioning (these dimensions do not concern drilled openings and circles):

• Diameters - for all circles (not arcs), a circle diameter is displayed. A dimension line coincides with the circle diameter positioned at an 45-degree angle to the horizontal axis.
• Radial - for all arcs and circles, the radius is displayed. Circles are dimensioned in this manner if the Diameters option is not selected. A dimension line coincides with the radius set at an 30-degree angle starting from the beginning point of the arc.