Equipment Modelling : Primitive Box

BOX

Box is well known to all of us. It has three dimensions (Xlength, Ylength, Zlength) which needs to be defined in PDMS to model it.

By default, Orientation of Box is Y is N and Z is U.

P-Point Configuration

Box has Seven P-points, one p-point on each face with direction perpendicular to face and Origin (P0) at Center. 

Each P-point has attributes Direction and Position.

All dimensions given are measured half on either side of origin in respective axis direction (E-N-U).

Image 1 P-Point Configuration

We can Model box in PDMS by two methods :

1. By Graphical Method

2. By Command Line

1. Graphical Method
To start with Box Modelling, Equipment Application shall be selected.
Select Equipment or Sub-Equipment under which you want to model Box.

Go to Create Menu, select Primitives Option

Image 2 Create PrimitivesOption

It will open Primitive form, which lists all Primitives available in PDMS.

Image 3 Primitives Form

 Select Box Option, it will open following form, to input Dimensions of Box.

Image 4 Setting Dimensions and Level

Click on Parameters Option to Check Box Parameters. (Xlength, Ylength, Zlength)

Image 5 Box Parameters

Here you can notice that Ylength is North-South Direction, Xlength is in East-West Direction and Zlength is in Up-Down Direction. So in order to avoid orientation of Box at later stage, Box dimensions shall be input accordingly.

Once you enter Dimensions of Box, Set Level and Obstruction Attribute for Box.

Click on Create button, it will create Box with given Dimension and displays additional options to set other attributes.

Image 6 Specifying Box Attributes

Datum
Select Datum or Reference Point on Box, which will be used to Position Box.
Any P-point on Box can be selected, By default Datum is set to Origin of Box (P0).

Position
Enter 3D coordinates (ENU) to explicitly position box at specified position with respect to owner (Default) or given element.

Rotate
Enter angle by which primitive shall be rotated about origin and Select Direction about which it shall be rotated. 

Alight with P-point
It allows you to orientate Box in direction with Selected P-point from display. it basically connects Origin of Box to Selected P-point.

Clicking Next Button Completes Box Modelling.

Image 7 Box in PDMS

Modify Box
Go to Modify, Select Primitives Option.
Similar form as that of Box creation will appear, Change attributes wherever required.

Negative Box
Negative Box is nothing but hollow box.
For Modelling Negative Box, From Primitives Form (see Image 3) select Switch to Negative Primitives option, Select Negative Box and set all parameters and Attributes similar way as stated for creating Box.

2. Command Line Method
Following Attributes of Box and Negative Box must be set in order to correctly model it in PDMS.

Position, Orientation, Level, Obstruction, Xlength, Ylength, Zlength.

Creating Box/Negative Box
New Box                                   - Creates Box
New NBox                                 - Creates Negative Box
Xlength 200 Ylength 500 Zlength 300
Level 0 10
Obstruction 2

Position and Orientation
Position at E 0 N 500 U 100     - Positions Origin of Box at given position
Position at id @                        - Positions Origin of Box to Origin of Selected Primitive
Position at idp @                      - Positions Origin of Box to Selected P-point

Orientate Y is E and Z is U 

Rotate About E by 45               - Orientates Box through Origin about E by 45

Rotate Thro P3 About S By 45 - Rotates Box through P3 about S by 45

Connect IDP @ to IDP @         - Orientates Box so that Selected P-point of Box gets connected to Selected P-point on another element.

(Note :  Not all Commands are covered here. Use Command whichever is useful depending upon requirement).