Otros elementos literarios

Limits Defined View:

To create a matchline view select Create>View>Limits defined view from the main menu to get the form as shown in Figure 1. Fill up the co-ordinate positions of the limits with respect to the world and choose the scale of the drawing and the representation type of the view. Fill up the drawlist and the graphics can be updated.

Figure 1 User defined View

When we talk about creating a User defined view, it is about creating a view within an identified box where the system decides the scale of the view. This type of views are normally used for Keyplans, Isometric views etc. Where the scale is not

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an important factor. To create an user defined view select Create>View>User Defined from the main menu.

Drawlists (IDLI’s)

IDLI’s are very important to create a proper view. To navigate to the drawlist reference of any view, be at the VIEW element in the members list and type GOTO IDLN in the command window.

Each IDLI is made of ADDE elements and REME elements. ADDE elements are those that need to be added in the drawlist and REME elements are those which need to be excluded from the drawlist. To modify a drawlist, be at the IDLI element and select Modify>Drawlist from the main menu. The form obtained is as shown in Figure 2.

Figure 2

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Number of draw lists (IDLI’s) can be grouped under one Drawlist library (DLLB).

These IDLI’s can then be referred by views. Generally, each drawing will have a DLLB of its own.

To add the elements appearing within a certain volume, we can type the command

ADD /XXXX within E 1000 N 1000 U 10000 TO E 5500 N 2430 U 8000

in the command window. This command will add all the elements appearing under /XXXX which fall completely within the specified limits.

Draft Dimensioning

To create dimensions, select DRAFT>Dimensioning from the main menu and select Create>Dimension Toolbar from the main menu. The form obtained is as shown in Figure 3.

Figure 3

Linear Dimensions (LDIM’s)

The LDIM’s will consist of DPPT’s, DPBA’s and DPOI’s. The important attributes of a LDIM are:

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Pjust : Justification of the Projection Text.

Direction : The direction of the dimension Plcl : Projection line clearance.

Angular Dimensions (ADIM’s)

The PDIM’s also consist of DPPT’s DPBA’s and DPOI’s. The important attributes of an ADIM are:

Sense : To toggle between clockwise and anticlockwise

Ddna : The name of the item for which the dimension is attached to.

Osht : The overshoot value of the projection line Plcl : The clearance value of the projection line Radial Dimensions (RDIM’s)

This has no members and has the following important attributes:

Dflag : Toggle between Diameter / Radius

Ddeg : The angle at which the diametric dimension appears Dtflag : The position at which your dimension text appears Dsty : Toggle between centre line type / Leader line type /

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Dtoff : The Dimension Text Offset, useful to position the dimension text

Ptoff : The Projection Text Offset, useful to position the projection text

Ptchei : Projection Text Height Plpen : Projection Line Style Dlpen : Dimension Line Style

Gaps : To create gaps in the dimensions to avoid crossing over graphics.

Most of these values can be set at a higher level in the hierarchy itself and they will be navigated down to all the elements. These can be overruled wherever required.

The other important attributes for DPBA and DPOI are

Baindicator : Toggle between Before / After (for DPBA) Position : The position wrt /* (for DPOI) Draft Labeling

To create labels in Draft, select Draft>Labeling from the main menu. Generally, there are two types of labels, GLAB and SLAB.

General Label (GLAB)

The general label can be attached to any element and the attribute information can be displayed as part of it. The important attributes of the GLAB are:

Ddna : The reference to the element to which the GLAB is attached Lfra : Toggle between boxed label / unboxed

Llead : Toggle for leader line

Lshape : The shape of the leader line

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Alignment : The alignment of the text (vertical alignment) Justification : Justification of the text (horizontal justification) Btex : The intelligent text to be generated.

DRAFT gives you the ability to construct sections through specified Design items, the results of which can be displayed at VIEW level. All Planes are database items and can therefore be used with more than one VIEW. There are three types of Plane element that can be used to define four types of section plane, namely:

1.0 A Perpendicular Flat Plane passes through a specified point in the 3D design, being oriented so as to be perpendicular to the current VIEW direction. The VIEW contents that are discarded can be on either side of the plane. This type of plane would be used as either a section or a backing plane.

2.0 A Flat Plane is similar to a perpendicular flat plane, but can be oriented to allow views of the section from any angle.

3.0 A Stepped Plane is a folded plane (i.e. a series of non-intersecting straight line spans) that extends to infinity in both directions along a specified axis. The

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shape is defined by a series of points, the ends of the plane also extending to infinity. The simplest form of stepped plane would be defined by two points and would be equivalent to a Flat Plane. Any VIEW direction can be used and the VIEW contents on either side can be discarded. Note that the two end spans must not intersect each other or an inner span. A stepped plane is illustrated in Figure 1.

4.0 An Enclosed Plane. This is a particular form of stepped plane in which the first and last points that define it coincide to form a ‘tube’ that is infinitely long along its axis. Any VIEW direction can be used and either the inside or outside of the

‘tube’ can be removed. An enclosed plane is illustrated in Figure 2.

Sections are of three types in PDMS - Draft viz. Section Flat, Section Perpendicular and Section Stepped. To create a section in PDMS, we create a view section (VSEC), section planes (FPLA or PPLA or SPLA) and apply the section planes to the view. The important attributes of VSEC element are:

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Plrf : The plane reference

Idlname : The IDLI reference, which lists the elements to be sectioned.

Pmode : The attribute which can define whether the section is to be done below the plane or above the plane.

FPLA / SPLA / PPLA

FPLA : Flat Plane

PPLA : Perpendicular Plane SPLA : Stepped Plane

The examples of FPLA, SPLA and PPLA are given below. The important attributes of these planes are:

Position : The position of the plane

Direction : The direction of extrusion (in case of stepped plane) Normal : The normal direction (in case of a flat plane)

Gtype : Can be open / closed. (In case of stepped plane)