Calculate Part Numbers

We must determine the part numbers to use for the union screws and elbows. To do this, we create additional rules in our assembly.

The first part of this rule calculates a part number to use for the Port A screw, based on the value of the port_a_size parameter. In this rule, we use a new statement Select Case to execute one of a group of statements. The statements executed depend on the value of an expression.

1. Add a new rule named screw_part_number_rule.
2. Create the first section of the rule. This section computes a variable portion of the part number, based on the port_a_size parameter value. The value is held in a temporary variable named Screw_num1. Once the value is determined, the rule constructs the entire part number string. Use the Keywords drop-down menu on the toolbar above the text area to help you fill in this rule.
   

   Copy Code Block

   Select Case port_a_size
   Case .50
   Screw_num1 = 050
   Case .75
   Screw_num1 = 075
   Case 1.00
   Screw_num1 = 100
   Case 1.25
   Screw_num1 = 125
   Case 1.50
   Screw_num1 = 150
   Case 2.00
   Screw_num1 = 200
   Case 2.50
   Screw_num1 = 250
   Case 3.00
   Screw_num1 = 300
   End Select
   
   port_a_screw_part_number = "UNBRAKO-" & Screw_num1 & "-SCREW"

   In the rule we have created, if port_a_size = 0.50, the part number is created as -

   UNBRAKO-050-SCREW

   We save this value in a parameter for later reference.

3. Copy and paste the rule text you created, and then replace port_a_size with port_b_size. Set the parameter to port_b_screw_part_number.
   

   Copy Code Block

   Select Case port_b_size
   Case .50
   Screw_num1 = 050
   Case .75
   Screw_num1 = 075
   Case 1.00
   Screw_num1 = 100
   Case 1.25
   Screw_num1 = 125
   Case 1.50
   Screw_num1 = 150
   Case 2.00
   Screw_num1 = 200
   Case 2.50
   Screw_num1 = 250
   Case 3.00
   Screw_num1 = 300
   End Select
   
   port_b_screw_part_number = "UNBRAKO-" & Screw_num1 & "-SCREW"

4. Create another copy of the rule text, and then replace port_a_size with port_c_size. Set the parameter to port_c_screw_part_number.
   

   Copy Code Block

   Select Case port_c_size
   Case .50
   Screw_num1 = 050
   Case .75
   Screw_num1 = 075
   Case 1.00
   Screw_num1 = 100
   Case 1.25
   Screw_num1 = 125
   Case 1.50
   Screw_num1 = 150
   Case 2.00
   Screw_num1 = 200
   Case 2.50
   Screw_num1 = 250
   Case 3.00
   Screw_num1 = 300
   End Select
   
   port_c_screw_part_number = "UNBRAKO-" & Screw_num1 & "-SCREW"

5. Click OK to save the rule and close the dialog box.
6. Save your assembly file.

Previous | Next