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Create the Port_A_Rule

There will be quite a bit going on with Port A when we change the port size. We will need to change the port size, update its iPart number, change the screw size if required, screw location, and screw kit part number.

  • Let’s add a rule to do this.
  • Make sure the manifold block assembly is active, and click the Add Rule icon.
    Name this rule “port_a_rule”.

The first part of this rule will adjust the screw pattern spacing, based on information stored in the union part’s iPart table. We can look up the row in use based on the port_a_size parameter, and then assign values to two different assembly parameters from two other columns.

i = iPart.FindRow(“port_a_union”, “port_size”, “=”, port_a_size)
port_a_y_dist_between_screws = iPart.CurrentRowValue(“y_dist_betwn_screw”) port_a_x_dist_between_screws = iPart.CurrentRowValue(“x_dist_betwn_screw”)

The iPart-related statements used above can be found on the iParts category under the Rule Syntax tab.

The next part of the rule will select the appropriate iPart row inside the screw part based on the selected port size. In this section, we use a series of “if” statements to set the appropriate iPart member (“Screw-01”, etc.), according to the current value of the “port_a_size” parameter.

If port_a_size = .50 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-01”)
ElseIf port_a_size = 0.75 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-02”)
ElseIf port_a_size = 1.00 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-02”)
ElseIf port_a_size = 1.25 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-03”)
ElseIf port_a_size = 1.50 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-04”)
ElseIf port_a_size = 2.00 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-04”)
ElseIf port_a_size = 2.50 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-05”)
ElseIf port_a_size = 3.00 Then
iPart.ChangeRow(“port_a_union_screw”, “Screw-06”)
End If

The last part of this rule for Port A will get the part number for the flare flange and store it in an assembly parameter, where we will use it in another rule later on.

port_a_union_part_number = iProperties.Value(“port_a_union”, “Project”, “Part Number”)

Before you continue, save the file.

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