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Donald B. Cheke
www.textualcreations.ca
TurboCAD Pro V16.1 - Helical Tri-Lobe Blower
Donald B. Cheke
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Donald B. Cheke
Copyright © 2009 Donald B. Cheke
www.textualcreations.ca
TurboCAD is a registered trademark of IMSI/Design.
Published by:
Donald B. Cheke
Saskatoon, SK Canada
Visit: www.textualcreations.ca
All rights reserved
No part of this document may be reproduced, copied, stored on a retrieval system or transmitted in any
form without written permission from the author. The purchaser may, however, print one copy of the
document to paper and may make one backup copy of the downloaded material for personal safe
keeping.
Limitation of Liability
While every effort has been taken in the preparation and the writing of this document the author
assumes no responsibility for errors and/or omissions nor for the uses of the material and the decisions
based on such use. No warranties are made, express or implied with regard to either the contents of the
document, its merchant ability or fitness for a particular purpose. The author should not be liable for
direct, indirect, special, incidental or consequential damages arising out of the use or inability to use the
contents of this document.
Special Note
All of the work presented within this tutorial is based on TurboCAD Pro V16. Although users of previous
versions are welcome to try the tutorial it cannot be stated what results will be achieved. Many changes,
some subtle and others not so subtle, are made with each program revision. Although many steps and
directions would be generic eric some may not be. The same can be said for tools between versions. Older
versions may not have the same tools as Pro V16 and if the same tools are available the tools
themselves may have been revised and hence, work in a different manner than they previously did.
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Donald B. Cheke
www.textualcreations.ca
Table of Contents
Table of Contents ......................................................................................................................................................... 3
Introduction .................................................................................................................................................................. 4
Setup .............................................................................................................................................................................. 6
Initial Lighting ............................................................................................................................................................. 14
Tri-Lobe Profiles ......................................................................................................................................................... 19
2D Profiles to 3D Objects ......................................................................................................................................... 40
Tri-Lobe Rotor Construction ..................................................................................................................................... 59
2D Profiles - Rotor Shafts, Bearings & Seals ........................................................................................................ 67
2D to 3D - Rotor Shafts, Bearings & Seals ............................................................................................................ 83
Gear Construction ...................................................................................................................................................... 96
End Cap Refinement & Bolts ................................................................................................................................... 99
Snap Rings ............................................................................................................................................................... 114
Main Case Base ...................................................................................................................................................... 118
Materials Application ............................................................................................................................................. 125
Named View ............................................................................................................................................................. 146
Render Scene Luminance ..................................................................................................................................... 147
Render Scene Environment .................................................................................................................................. 150
Saving the Rendered Image.................................................................................................................................. 153
Cutaway .................................................................................................................................................................... 155
Saving the Next Rendered Image ........................................................................................................................ 160
Paper Space – Title Block ..................................................................................................................................... 162
Paper Space – Page 1 Viewports & Annotations .............................................................................................. 187
Paper Space – Page 2 Viewports, Dimensions & Annotations ....................................................................... 195
Appendix – An Important Note about TurboCAD Materials ............................................................................. 213
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Donald B. Cheke
www.textualcreations.ca
Introduction
Mechanical design and illustration is truly one of my favorite areas when it comes to CAD and graphics
works. It is an area that I never tire of investigating and an area where I am always awed by the ingenuity
of people. I found much pleasure researching and writing TurboCAD Pro V16.1 – Helical Tri-Lobe Blower
and hope that you will enjoy the magic of TurboCAD as you work your way through the tutorial.
Best regards,
Don
The tri-lobe blower design and dimensions are based on some web research and some imagination on
the part of the author. Within the tutorial the reader will be led through each keystroke to produce all
components of the blower that is illustrated on the cover of the tutorial. The reader will learn how to
insert standard lighting and how utilize render scene luminance. The reader will learn how to establish a
render scene environment and the reader will learn how to render their drawing and save it in a high
resolution image format. Additionally, the reader will learn how to create a legal size (8.5 x 14) title block
and a two page paper space presentation using viewports, dimensions and annotations.
This tutorial is in no way intended to teach mechanical design or construction, but rather it is intended to
teach the use of some of the tools that TurboCAD has to offer and to introduce the new user to a drawing
methodology. The author feels confident that the techniques outlined within the tutorial can help lay the
foundation for future successful TurboCAD drawing and illustration for even the newest user.
As with any technically advanced software, the user is generally faced with a steep learning curve. It is
the hope of the author that the money and time spent working through a Textual Creation tutorial will
help ease the learning and allow the reader to come away feeling confident that they made a wise
decision.
This tutorial will assume that the reader has the full edition of TurboCAD Pro V16.1 with the current
Architectural and Mechanical add-ons. Although no architectural specific tools are used, one mechanical
specific tool is –the Thread tool.
There are many ways to approach a project and it is likely that each person using the program would
proceed in very different ways, so be open to alternative methods as experience builds. What is
important is that the user becomes familiar with the objects that they wish to model and begin to look at
them in a different way than they might otherwise do. What primitive shapes make up the whole? What
will be required of these primitive shapes early in the drawing and how will this affect needs further
along? What component or components should be started with? Many questions can only be answered
through experience, but hopefully some of them will be answered by the time the beginner has worked
through this tutorial. There is a great deal covered in this tutorial and the author urges the beginner to be
patient, to read very carefully and to take the time necessary to do a good job. Try to enjoy the process as
much as you will enjoy the final results.
This tutorial assumes that the beginner has studied the desktop to some degree and can locate most of
the tools. Since there are endless desktop configurations that can be set up in TurboCAD the author has
opted to illustrate the required tools with the V16 user interface, and the default toolbars in their
undocked format (Office 2000 theme).
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Donald B. Cheke
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Please remember that any supplied images and files are for use within the tutorial only and may not be
shared or sold to others.
A free HDR image is used within the tutorial. Please download the HDR image called:
pillnitz_park2_half.hdr
This is a free image that is found in the Starter Collection at:
http://www.lightworks-user.com/hdri_starter_collection/realtexture.htm
Direct link to download:
http://www.lightworks-user.com/hdri_starter_collection/bin/RealTexture/pillnitz_park2_half.zip
As images do go missing from the internet occasionally, the original zipped image has been supplied
with the download. Unzip it and store it in a permanent location on the hard drive.
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Donald B. Cheke
If need be, scroll in with the scroll wheel so that the grid is visible on screen.
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Tri-Lobe Profiles
The tri-lobe profiles will be the first objects to be created, working towards what is illustrated below.
Switch to Front view.
Select Plane by Active View from the Workplane toolbar.
Select the Circle Center and Point tool from the Circle/Ellipse toolbar.
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Donald B. Cheke
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Select Green from the color dropdown menu on the Property toolbar.
Press Shift + Tab to enter into the Coordinate fields. Type 0 in the X field. Press Tab to move to the next
field and type 0 in the Y field. Press Enter to place the first point of the first circle.
Tab into the Inspector Bar and enter 1.25 in the Diameter field. Press Enter.
Select the Line tool from the Line toolbar.
Select Green from the color dropdown menu on the Property toolbar.
Place the cursor by the top edge of the circle and Q SEKE snap to place the first point of the line. Tab into
the Inspector Bar and enter .175 in the Length field and 90 in the Angle field. Press Enter.
Select the Double Point tool from the Circle/Ellipse toolbar.
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Donald B. Cheke
2D Profiles to 3D Objects
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Select the Simple Extrude tool from the 3D object toolbar.
Left mouse click the coral profile as the object to extrude. Tab into the Inspector Bar and enter -12 in the
Height field. Press Enter.
The inflow and outflow ports will now be established by lofting two profiles.
Switch to Left view.
Select Plane by Active View from the Workplane toolbar.
Select the Ellipse Fixed Ratio tool from the Circle/Ellipse toolbar.
Select Red from the color dropdown menu on the Property toolbar.
Place the cursor by the edge of the extrusion and E SEKE snap to place the first point of the ellipse.
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Donald B. Cheke
G SEKE snap the second point at the grid intersection indicated in the picture below.
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Press the Space Bar to exit the tool.
Select the ellipse.
Right mouse click and select Keep aspect ratio from the local menu.
With the ellipse still selected, Tab into the Inspector Bar and enter 9 in the Size X field. Press Enter.
Select the Circle Center & Point tool from the Circle/Ellipse toolbar.
Place the cursor by the edge of the ellipse and E SEKE snap to place the first point of the circle. Tab into
the Inspector Bar and enter 4 in the Diameter field. Press Enter.
Press the Space Bar to exit the tool.
Switch to Isometric SE view.
Select the ellipse. Tab into the Inspector Bar and enter 3 in the Delta X field. Press Enter.
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Donald B. Cheke
www.textualcreations.ca
Place the cursor over the left circular face and then press the Page Down key to move to the 'hidden'
face. Left mouse click it as a face to omit. In progress below.
Place the cursor over the back face and left mouse click it as a face to omit. In progress below.
Select Finish.
Select the 3D Add tool from the Boolean & Facet toolbar.
Press and hold the Shift key down. Left mouse click the seven 3D objects as the objects to add. Release
the Shift key.
Select Finish.
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Donald B. Cheke
The inflow and outflow collars will now be created.
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Switch to Isometric SW view.
Select the Concentric Circles tool from the Circle/Ellipse toolbar.
Select the Auto Workplane by Face tool from the Workplane toolbar.
Place the cursor over the edge of the left circular face and C SEKE snap the first point of the first circle. In
progress below.
Tab into the Inspector Bar and enter 3.5 in the Diameter field. Press Enter.
Tab into the Inspector Bar and enter 5.5 in the Diameter field. Press Enter to create the second circle.
Select Finish.
Select the Auto Workplane by Face tool from the Workplane toolbar again to turn it off.
Select the Simple Extrude tool from the 3D Object toolbar.
Select the Use Compound Profile option.
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Donald B. Cheke
Press Esc to exit the Rubber Stamp tool.
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Select the 3D Subtract tool from the Boolean & Facet toolbar.
Select end cap as the object to subtract from. Press and hold the Shift key down. Select the eight
cylinders as the object to subtract. Release the Shift key. Select Finish. In progress below.
Press the Space Bar to exit the tool.
Select the end cap, Tab into the Inspector Bar and enter -1/16 in the Delta Y field. Press Enter to move it
over the width of the gasket.
Press Esc to deselect the selection.
2D Profiles - Rotor Shafts, Bearings & Seals
Before filleting the end cap a series of 2D profile will be created that represent many of the inner
components of the blower. This includes the bearings, the shafts, the seals, the lantern rings, the snap
ring receptacles and the end caps. It sounds like a lot of work but in reality it is quite straight forward and
the task will be made that much easier using the Revolve tool and later the Mirror Copy tool.
Since the revolve tool will be used only half profiles will need to be created.
Select the two 12 inch forest green lines and assign then to layer 0 for now.
Press Esc to deselect the selection.
Turn off the 2D layer.
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Donald B. Cheke
Press Ctrl + K to open the Select by Colors dialogue. Select Green & Red and then click OK.
Assign the selection to the 2D layer.
Switch to Left view.
Select Plane by Active View from the Workplane toolbar.
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The image below shows what is being worked towards, however, it will be started in a different location
and moved into location.
Select the Rectangle tool from the Line toolbar.
Select Coral from the color dropdown menu on the Property toolbar.
M SEKE snap the upper forest green line to place the first point of the central shaft. Move the cursor in a
right upwardly direction for a short distance and then Tab into the Inspector Bar and enter 11 in the Size
A field and .625 in the Size B field. Press Enter.
The next profile will help define the front end socket location.
Select Dark Turquoise from the color dropdown menu on the Property toolbar.
V SEKE snap the first point of the rectangle to the upper left corner of the coral rectangle. Move the
cursor in a right upwardly direction for a short distance and then Tab into the Inspector Bar and enter .25
in the Size A field and .375 in the Size B field. Press Enter.
V SEKE snap the first point of the next rectangle to the upper left corner of the last rectangle. Move the
cursor in a right upwardly direction for a short distance and then Tab into the Inspector Bar and enter .25
in the Size A field and .75 in the Size B field. Press Enter.
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Donald B. Cheke
Select the 3D Subtract tool from the Boolean Facet toolbar.
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Select the bolt head as the object to subtract from and then select the polygonal prism as the object to
subtract. In progress below.
The shaft will now be threaded with the new V16 Thread tool. If the reader does not have this tool leave
the shaft bear, but make a small chamfer on the tip.
Select the Thread tool from the 3D Object toolbar.
Select Simple Thread. Tab into the Inspector Bar and enter .07 in the Pitch field. Press Enter.
Place the cursor over the end of the bolt and left mouse click it to select the plane face. In progress
below.
Left mouse click the cylinder as the cylinder to thread. In progress below.
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Donald B. Cheke
Tab into the Inspector Bar and enter 1 in the Height field. Press Enter.
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Select the Fillet Edges tool from the 3D Modify toolbar.
Tab into the Inspector Bar and enter 1/64 in the Start Radius field. Press Enter.
Select the bolt head as the object to fillet. Double click the upper circle to select it as the edge to fillet
and to perform the operation. In progress below.
Select the 3D Add tool from the Boolean Facet toolbar.
Select the head and the shaft to add them together. In progress below.
Press the Space Bar to exit the tool.
Select the bolt. Press D SEKE and relocate (C SEKE) the reference point to the inner circle of the bolt
head. In progress below. Leave the bolt selected.
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Donald B. Cheke
www.textualcreations.ca
Switch to Isometric SE view.
Select the 3D Subtract tool from the Boolean Facet toolbar.
Select the main case as the object to subtract from and then select one of the bolts as the object to
subtract. In progress below.
Repeat to subtract all the other bolts.
Press the Space Bar to exit the tool.
Turn off the Main Case layer.
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Donald B. Cheke
Select the Orange line and assign it to the 2D layer.
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Turn on the Gaskets layer and the Front End Cap layer.
To create the rear gasket, select the front gasket. Press D SEKE and relocate (C SEKE) the reference
point to the back side of the upper left hole, as indicated in the picture below. In progress below.
Right mouse click and select Rubber Stamp from the local menu. Move the cursor to the back end cap
and C SEKE snap the selection to the upper left corresponding circle. In progress below.
Press Esc to exit the Rubber Stamp tool.
Create one new layer called Rear End Cap.
Select the rear end cap and assign it to the Rear End Cap layer.
Turn off the Gaskets layer.
Select both end caps.
Select the Suppress Hidden Lines tool from the Render toolbar.
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Donald B. Cheke
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Allow time for the graphics to load and the render to occur. (1 minute 11 seconds on the author's off the
shelf HP)
Press Esc to deselect the selection after it renders. It looks pretty good but it is still too bright and could
use a bit more life.
Render Scene Luminance
From the View menu at the top of the TurboCAD desktop select Lights. Left mouse click the three light
bulb icons to turn them off in the drawing.
Click OK to exit the Light Properties dialogue.
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Donald B. Cheke
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Close the image an maximize TurboCAD.
Left mouse click the Wire Frame icon 2X, once to stop the render and once to turn off perspective.
Cutaway
A cutaway of the blower will now be created in a new file.
Save the tutorial file now.
Select Save As from the File menu at the top of the TurboCAD desktop.
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Donald B. Cheke
Save the drawing with the file name Helical Tri-Lobe Blower Tutorial Cutaway.tcw
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Switch to Front view.
Select Plane by Active View from the Workplane toolbar.
To determine the size and location of the cutaway, select the Rectangle tool from the Line toolbar.
Select Red from the color dropdown menu on the Property toolbar.
Using one C SEKE snap and one Q SEKE snap place a rectangle over the blower as indicated in the
picture below. Zoom in close to snap to the correct locations.
Switch to Isometric SW view.
Select the Simple Extrude tool from the 3D Object toolbar.
Select the Two sided extrude option.
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Select 12 pt from the Font Size dropdown menu on the Property toolbar.
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Press Esc to deselect the selection.
Select Zoom Full View.
Paper Space – Page 1 Viewports & Annotations
There is eventually going to going to be two paper space pages, with this first page dedicated to the
general cutaway overview. Page two will look specifically at elevations.
Double click 1 OF 1 at the lower left corner of the sheet to open the Properties dialogue. Under the
General tab, change the text to read 1 of 2. Click OK.
The saved cutaway image is going to be used on page one, although a viewport could have been used
had this page been set up in the cutaway file that was made earlier. Using the image will make detailing
a bit easier (although detailing can also be made easy with viewports if a user turns layers on and off in
the viewport properties as needs dictate to clear the view). A user can also render a viewport and use a
cached image to see all the rendered details without having the viewport continually rendering while
moving around.
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Select 12 pt from the Font Size dropdown menu on the Property toolbar.
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Press and hold the Shift key down. Left mouse click the two viewports to add them to the current
selection. Release the Shift key.
Tab into the Inspector Bar and enter 4.425 in the Y Position field. Press Enter to center the selection.
Press Esc to deselect the selection.
Select Zoom Full View.
Printing
Printing is generally very straightforward, but occasionally it may prove difficult, especially if the model is
complex. This is the case with the blower. Trying to print page 2 with two hidden line drawings crashed
TurboCAD for the author. The fix was to change the ACIS settings to Draft.
From the Options menu at the top of the TurboCAD desktop select ACIS. Select Draft and click OK.
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