Import the Split Bend with STEP Version of "VTube-LASER Demo CAD Model 2"

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Vtube-step logo.jpg
Import Split Bend in Demo CAD Model 2

Vtube-step 1.77.4.jpg

Import STEP File

Step 1 - Install at least version 3.2 build 778 of VTube-STEP or VTube-LASER

The STEP version of the Demo Model 2 file is included with this installation. Also, the collect split bend feature is only available in version 1.79 or newer.

Step 2 - Clear VTube and Import STEP File

Vtube opendialog import step model2.jpg

Clear VTube using the Clear Project icon. Change to the Import/Export menu and press Import STEP. The file to import is installed in the C:\Users\Public\Documents\VTube\Demo Files folder by default. The filename is "VTube-LASER Demo CAD Model 2.stp".

Make the Tube Transparent

This is not a required step. However, when the the tube is transparent you can see if you have collected either the inner or outer diameter. Selecting both the OD and the ID in various straights will help VTube to extract the OD and the wall thickness at the same time. (The selection process happens in the "Collection The Tube" process shown in the next section.)

Step 1 - Load the Entity Control

Press the Entity button on the right:

Vtube-step entitymenu1.jpg

Vtube-step entitymenu closeup1.jpg

Step 2 - Select the imported tube

In View mode, select the tube with a Window using the mouse and creating a window around the image.

Vtube-step selecttube model21.jpg

Step 3 - Set the Transparency to 0.750

In the Entity Control window Imported Model tab, set the transparency to .750 and press Set.

Vtube-step entitymenu closeup 750trans imported1.jpg

The tube will now appear like this:

Vtube transparent tube1.jpg

Collect the Tube Straights

Use these steps to collect the tube straights.

Step 1 - Load the Collect Control

Close the Entity Control window if it is open. Then open the Collect Control window.
Vtube collectcontrol1.jpg

Step 2 - Setup and Start the Collection

In the "Straight from Cylinder SURFACE" tab, check both checkboxes, be sure the straight value is "1", then press the large "Add a Cylinder..." button.
Vtube collectcontrol addacylinder auto1.jpg

Step 3 - Select the Straights 1 Through 4

Begin selecting straights. Select straight 1, then 2, then 3, then 4 like this:
Vtube collectingstraights1-41.jpg

Step 4 - Skip Straight 5 to Select 6

Skip straight 5 by setting the straight number to 6 in the Collect control.
Vtube collectcontrol skipto6.jpg

Step 5 - Select Straights 6 and 7

Select the rest of the straights.
Vtube collectcontrol selectallstraights demo26.jpg

Step 6 - Setup to Select Split Bend Surface

Change tabs in the Collect Control to gather the Split Bend Surface:
Vtube spltbendsurface straight12.jpg

Set the straight number to "5" because we are going to select a split bend surface that will build a straight 5.
Vtube spltbendsurface straight51.jpg

Step 7 - Select The Bend

Select any part of the bend torus that will give contain points at the extrados apex and the intrados apex:
Vtube spltbendsurface selected2.jpg

In this case, we only need to select one part of the torus to get to both the inside and outside apexes.

Step 8 - Calculate The Centerline

After collection, press the Rebuild Parametric Tube from Collected button:
Vtube calculatetubemodel1.jpg

VTube will ask if you want to Fix Negative Straights and for Split Bends, press Yes button:
Vtube calculatetubemodel2.jpg

Display Parametric Model

The new MASTER model will display on the screen - along with the split bend geometry:
Vtube splitbend parametric model3.jpg

This is the model that should display:
Vtube splitbend parametric model3 image.jpg

This is the data that should display:
Vtube splitbend parametric model3 data.jpg

Compress Bender Data for Reporting and Use in VTube-LASER

Step 1 - Compress the Bend Data By Switching Split Bend ON

The data shown above displays the 4th and 5th bend as two adjacent 90-degree bends in the LRA data. VTube can compress these two bends into a combined bend to show 180 degrees - which is what the bender will want to see. Enter the Tube Data menu, press Bend Setup tab, then press the Split Bend Setup button:
Vtube splitbend SplitBendSetup Button.jpg

This is the Split Bend Setup menu. It is available in both STEP mode and LASER mode for the MASTER data:
Vtube splitbend window nosplitbend.jpg

Change the Split Bend settings so that the 5th straight splits a bend like this:
Vtube splitbend window splitbend fifth.jpg

When you close this window, the bender data will compress like this:
Vtube splitbend parametric model2 data compressed.jpg

Step 2 - Switch to LASER Mode

Press the LASER button in the upper right corner of the screen.
Vtube-laser displayemptyscreen demomodel2.jpg

Step 3 - Display the MASTER Tube in LASER

Display the master tube on the screen following these steps:
Vtube-laser regeneratemastertube steps.jpg

Vtube-laser mastertube originalview.jpg

Step 4 - Orbit the MASTER Tube

If necessary, orbit the tube to a good viewing orientation:
Vtube-laser mastertube orbitbutton.jpg

Vtube-laser mastertube bestview.jpg

The master tube is ready for measuring.