Introduction to Features
Loft and Modifying Features
Prepared by Stephen Yaffe
What you should familiar with What you will learn by completing
before starting this tutorial. this tutorial.
; Pro/DESKTOP graphical user ; Workplane creation
interface ; Construction lines
; Sketching tools ; Applying constraints
; Object browser ; Equal length lines
; How to select objects ; Loft through profiles
; What makes a valid profile ; Chamfering faces
; Constraints ; Projecting Lines
Conventions of this Tutorial
This is the third tutorial in the introductory series for Pro/DESKTOP 8 features. Since most people who attempt this tutorial will have already completed Lessons 1 and 2, this tutorial assumes a nominal knowledge of the Pro/DESKTOP 8 GUI. In this tutorial, features will be introduced using
keyboard shortcuts. These will be shown as capital letters within brackets [**]. Feature commands (extrude, revolve, etc.) will also be shown in
brackets but with the Control key or Alternate key followed by a plus sign
(+) as a preface, and multiple key strokes separated by a comma.
Example, to create an extrusion using keys rather than the icon, one would first press down the Alt key, then while holding it, press and release the R
key once, then press and release the E key, and finally release the Alt Key.
In notation form, extrusion looks like this: [Alt + R, E].
Sequential operations will be indicated by commands separated by an arrow [>]. For example, the following command “[C] > Drag a circle” means – type
the letter “C” key on your keyboard to select the circle sketching tool, and then drag a circle.
Just in case you didn’t complete Lesson 1 or 2, there are a few things you will need to do to get your computer ready for this tutorial. This project has been done in INCHES. The first thing you will need to do is make sure that the unit of measurement on your computer is set to inches.
1. Open Pro/DESKTOP
; Start > Programs > PTC Pro/DESKTOP 8.
; From the file menu > go to Tools > Options.
; Select the Units tab > change the units to Inches in both fields > OK.
In this assignment, you will be creating a complex polygon. You will begin by sketching a septagon, and then you will project it up to a newly created workplane - sketch combination. After making some modifications to this
new sketch, you will first loft between these two profiles then chamfer the top and bottom of the resulting form.
1. Open a new design file
; [Ctrl + N] > [Enter]
; In the Workplane browser,
click on the plus sign to show
the initial sketch.
; Click once on the word Initial to
select the title > then click it
once again to edit it. ; Change the name to Bottom.
; In the design field, sketch a
2. Sketch six more lines,
connected at a single point in
the center. These lines will
become “spokes” for a seven-
3. Set the length of a line
; [Z] > Sketch the dimension of
one of these lines.
; Double click on the number tag
two or three times to activate
its properties box.
; Enter a new distance of 10” > [Enter].
4. Select all the lines and constrain them to be equal length
This selects all the lines. On the screen, all of the seven lines ; [L] > [Ctrl + A]
will turn red, indicating that they are selected.
; Move the mouse to the file menu at the top of the screen > select
Constraints > from the drop down menu select Equal Length. Now all your
selected lines will 10” in length.
5. Convert lines to Construction
; While all the lines are still
selected (red), move your
mouse to Line in the File Menu >
Select Toggle Construction.
The short cut for Toggle
Construction is [Ctrl + G].
Note: By converting these spokes to Construction lines, they will not become part of the “valid profile”, instead they will be considered reference lines. The word Toggle suggests that this command
functions as a switch, and can be turned on and off. The value of this will become clear after a few
6. Connect the ends of the seven
equal length spokes with seven
; Select the strait line tool [S] >
find the end point of a line (you
will see a black “snap-to” square
when you have found the end
point) and drag the line to the
end point of a neighboring line.
Note: In Pro/DESKTOP 8, once you have connected all the end points,
the septagon will be complete and the new valid profile will be filled
with a “fill color”. In Pro/DESKTOP 2000i2, to get a fill color, you will have to Toggle Sketch filled [Ctrl + Shift + F].
7. Convert the septagon to an
; [L] >While holding the [Shift]
key on your keyboard, select
each of the lines that make up
the seven-sided wheel (see the
picture to the right).
; Again, go to Constraint in the
File menu at the top of the
screen > from the drop-down
menu, select Equal length. (See
the picture below).
; To verify that the septagon in
now equilateral, you might want
to view onto the workplane.
Type [Shift + W] to look
straight down on your image.
To go back to the default,
isometric view, type [Shift + I].
As mentioned above, the word toggle suggests an on/off switch. The two images to the right here
show you that you can turn
selected lines in to construction lines by typing [Ctrl + G]. You can just as easily turn them into regular lines by typing [Ctrl + G] again. Try doing this now and see how the fill pattern turns on and off as the lines of the “spokes” and the lines of the “wheel” take turns being construction lines.
8. Create an Offset Workplane
; In order to Loft two profiles,
there needs to be two
different workplanes to loft
between. These workplanes can
be offset evenly, or at an angle
or between objects. This
tutorial requires the creation
of an Offset Workplane.
; Type [W] to select workplanes.
Note: in the select workplane mode, lines are not visible. But since workplanes expand and contract to completely and snugly
surround sketches, you should be able to identify the right
; Left-click on the workplane
with the sketch Bottom to
select it > While it is selected
(red), right click to bring up a
context sensitive menu > from
this menu, select New
; A new dialogue box will appear >
select Offset > [Enter].
; You will see a small yellow
square in the center of your
selected workplane; this is
called a “handle.”
; Click and drag this handle up to
Note: In Pro/DESKTOP 8, you will have a read out at your curser that indicates the distance of the offset as you drag up or down. Alternatively, you can simply enter
the desired value in the New Workplane dialogue box.
9. Add a New Sketch to your New
; While the new, offset
workplane is selected, right-
click. This will bring up a new
context sensitive menu.
; Select New sketch > name it
Top > [Enter] (see below right).
Note: Below you will see a picture of the Workplane browser with the new workplane, workplane 1 and the new sketch, Top.
10. Project the septagon up to the new sketch
; Type [L] to select lines > with no sketching tool selected (double-click once
on a blank area of the design field to deselect any sketching tool).
; Drag a selection lasso around the septagon in the sketch Bottom to select
all the lines.
; In the File menu at the top of the screen, select Line > from the drop-down
menu, select Project. This will “pop” the selected lines up into the active
Note: You can tell that a sketch is active by looking in the object browser. If the word by the sketch icon appears in bold, it is active. To activate a dormant sketch, in the object browser, double-click on the sketch name once.