View source for FreeCAD/C3/Introduction-to-Part-Design-Workbench/English

'''Title of script: Introduction to Part Design Workbench'''.

'''Author: '''Dr. Sathiya Narayanan, K.Sakthivel.

'''Keywords: '''FreeCAD, Part Design, Sketcher workbench, Sketcher tools, constrains, pad tool, pocket tool, video tutorial.


{| border=1
|- 
||'''Visual Cue'''
||'''Narration'''
|-
|| '''Slide 1'''

'''Title slide'''
|| Welcome to this Spoken Tutorial on '''Introduction to Part Design Workbench.'''
|-
|| '''Slide 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn to,
* Draw basic shapes.
* Use basic constrains.
* Draw the '''Flange Coupling''' component in 3D.
|-
|| '''Slide 3'''

'''System Requirements'''
|| To record this tutorial, I am using
* '''Windows 11 OS''' and
* '''FreeCAD version 0.21.2'''
|-
|| '''Slide 4'''

'''Prerequisites '''

'''https://spoken-tutorial.org'''
|| To follow this tutorial,
* Learners must be familiar with the '''FreeCAD''' interface.
* For the prerequisite tutorials, please visit this site.
|-
|| '''Slide 5 '''

'''Part Design Workbench'''
|| Let us now learn about Part design workbench.

This workbench provides tools for creating 3 dimensional solid objects.

Using this workbench it is possible to design precise 3D mechanical parts.
|-
|| '''Slide 6'''

'''Part Design Workbench'''
|| The Part design is intrinsically related to the sketcher workbench.

The sketcher workbench is used to create 2 dimensional geometries for use in Part design.
|-
|| Open the '''FreeCAD'''.

Select '''File '''and '''New''' to open the new file.

Click on the '''Start''' dropdown.

Select the '''PartDesign''' workbench from the drop down.
|| Let us open '''FreeCAD'''.

I will open a new file.

I have selected the ''' Part Design''' workbench.
|-
|| In the Combo View under Tasks menus >> Select the '''Create Body'''.
|| In the '''Tasks''' menu, under '''Start Part '''click on '''Create body'''.

A new '''Body''' needs to be created to draw a sketch.
|-
|| Select the '''Create Sketch'''.
|| Now under '''Start Body, '''click on '''Create sketch'''.

This creates a sketch view where you can draw the components.
|-
|| Point to the planes(xy, yz,zx planes)

In the Combo View.

Point to the planes under '''Select feature'''.
|| On the panel we can see three planes in 3 mutually perpendicular directions.

In the''' Combo View''' under '''Select feature''' three planes are shown.
|-
|| In the '''Combo view''' click '''XY-plane (base plane).'''

Click on '''OK'''.
|| Select '''XY-plane''' in the '''Combo View'''.

This denotes the top view.

Click the '''OK''' button''' '''to select the plane.
|-
|| Shows the tool bars.
|| Observe that new tools are shown on the toolbar.
|-
|| Point to the x-axis.

Select '''Create line tool.'''
|| Now let us draw a vertical line from the x-axis.

Select the '''Create line''' tool from the tool bar.
|-
|| Point to the x-axis.

Place the cursor on the x-axis.

Point to the '''Constrain point onto object '''symbol.

Point to the x-axis.
|| Place the cursor on the x-axis line.

You can see that the x-axis line changes to yellow.

You can see that a '''Constrain point onto object '''symbol appears near the cursor.

It denotes that the point is fixed to the line.
|-
|| Left click on the line and drag the mouse vertically up.

Left click again.

Point to the constraint.

Left click to complete drawing the line.
|| Now click on the line to start drawing it. 

Drag the mouse vertically upwards to draw a vertical line.

You can see a '''Vertical constrain''' symbol appearing near the cursor.

It represents the line drawn vertically.

Left click to complete the drawing of the line.
|-
|| Point to the x-axis.

(point to the symbol while editing)
|| Now let us draw a horizontal line along the x-axis.

Make sure that the '''Create line '''tool is selected.

You can check that by seeing the symbol near the cursor.
|-
|| Place the cursor on the line.

Point to '''Constrain point onto object '''symbol.
|| Place the cursor on the line.

You can see the '''Constraint Point onto object '''symbol near the cursor. 
|-
|| Click and drag the cursor horizontally to right side.
|| Click and drag the cursor horizontally to draw a horizontal line.

Now you can see two symbols appearing near the cursor.

'''Constrain point onto object '''symbol and '''Constrain horizontal '''symbol.
|-
|| Left click on the line.

Select the constrain.

Click to see the red line.
|| We don’t want two '''Constraint point onto objects'''.

This means that the''' '''line is fixed at two points to the same object.

Upon clicking, you can see that the entire drawing has turned to red. 
|-
|| Click on any one of the constraints.

Press the Delete''' '''key on the keyboard.
|| To clear that, click on any one of the constraints.

Press the Delete key on your keyboard to delete the constrain.
|-
|| point to the drawing.
|| Now you can see that the drawing came back to normal.
|-
|| Select '''Create line '''tool.

Place the cursor on the x-axis and click and drag the cursor.

Place the cursor slightly lower than the x-axis and left click.
|| Let us avoid the appearance of the '''Constrain Point Onto Object symbol '''twice.

To do this, let’s draw a line below the x-axis.
|-
|| Right click the mouse button.

Press Esc key.
|| To deselect the tools, right-click on the panel.

Or press the Escape key to deselect the tools.
|-
|| Cursor on the interface.
|| Now let us draw an arc.
|-
|| Select '''Create arc''' tool.

Place the cursor at the top of the vertical line.
|| Select the '''Create arc''' tool from the tool bar.

Place the cursor on the top end of the vertical line.

You can see that a '''X-Shaped''' symbol appears near the cursor.

It is the '''Constrain coincidence'''.

It denotes that the cursor is at the top of the end point.
|-
|| Left Click and drag the cursor outside.

Left click and drag the cursor to the left.

Drag the cursor to draw.

Left click on the mouse.
|| Now left click and drag the cursor to left or right.

You can see a model circle that can be drawn.

Click to release the model circle. 

Drag the cursor to start drawing the arc.

Left click again to finish the arc.

|-
|| Select '''Create circle '''tool.

Place the cursor on the end of the horizontal line.

Left click and drag the cursor.

Left click again.

Left click to finish the circle.
|| Now let us draw a circle.

Select the '''Create circle '''tool.

Place the cursor at the end of the horizontal line.

Check for the X-Symbol.

Left click and drag the cursor to draw the circle.

Once the definite size is visible, left click to finish the circle.
|-
|| point to the objects.
|| Observe that, we have drawn these shapes with no dimensions. 

Let us assign some values to them.
|-
|| Select the vertical line.

Select '''Constrain vertical distance tool.'''

Fill the '''Length '''field as 30 mm.
|| Let us select the vertical line.

Select the '''Constrain vertical distance '''tool from the tool bar.

'''Insert length''' pop up appears.

In the '''Length '''field type 30 mm and click the OK button.
|-
|| Point to the line.
|| You can see that a dimension is applied to that line.
|-
|| Select the horizontal line.

Select '''Constrain horizontal distance tool.'''

Fill the '''Length '''field as 30 mm.
|| Now select the horizontal line and click the '''Constrain horizontal distance ''' tool.

'''Insert length''' pop up appears.

In the '''Length '''field type 30 millimetre and click the OK button.

|-
|| Select the arc.

Select the arrow near the '''Constrain arc or circle tool.'''

In the drop down select '''Constrain radius.'''

Fill the '''Radius '''field as 10 mm.
|| Now to set the radius of the arc, select the arc.

Select the arrow near the '''Constrain arc or circle '''tool.

In the drop down select '''Constrain radius'''.

'''Insert radius''' pop up appears.

In the '''Radius '''field type 10 mm and click '''OK'''.
|-
|| point to the circle.
|| Now let us give the dimensions to the circle.
|-
|| Select the Circle.

Select the arrow near the '''Constrain arc or circle tool.'''

In the drop down select '''Constrain radius.'''
|| To set the radius for the circle, select the circle.

Select '''Constrain radius'''.
|-
|| Fill the '''Radius '''field as 20mm

Click OK.
|| '''Insert radius''' pop up appears.

In the '''Radius '''field type 20 mm and click OK.
|-
|| In the Combo View click on the Close button.
|| In the '''Combo View '''click on the '''Close''' button to complete the sketch
|-
|| '''Slide 7'''

'''Industrial Drawing'''

modeldrawing.png
|| Now let us use the tools to draw a Flange coupling.
|-
|| Select '''New file'''.
|| Now I will open a new file.
|-
|| Select '''Create body.'''

Click '''Create sketch.'''

Select '''XY-plane (base plane) in the Combo View.'''

Click on '''OK.'''
|| We can select the '''Create body tool ''' from the toolbar.

Then select '''Create sketch'''.

Select '''XY-plane '''and click''' OK.'''
|-
|| Select the '''Circle tool'''.

Place the cursor in the horizontal line on the left side.
|| Now let us draw two circles.

Select the '''Create circle''' tool and place the cursor on the x-axis.

You can see that line changes to a yellow color.

You can see that '''Constrain point onto object''' symbol appears near the cursor. 
|-
|| Click the line.
|| Now click on the line to draw a circle.
|-
|| Draw another circle on the right side on the same line.
|| Repeat the process on the other side of the x axis.
|-
|| Right click to deselect the tool.
|| Now right click the mouse to deselect the tool.
|-
|| Select the center of the left side circle and midpoint of the plane.

Select '''Constrain Horizontal Distance tool.'''
|| Select the center of any one of the circles and the midpoint of the plane.

Once the points are selected they turn to green color. 

Click '''Constrain Horizontal Distance''' tool.
|-
|| In the length field type 100 in the dialog box. 

Click '''OK'''.
|| In the '''Insert length''' dialog box, type the length as 100 millimetre and click 
'''OK'''.
|-
|| Select the centers of both the circles.

Select '''Constrain Horizontal Distance tool.'''

In the length field type 200 in the dialog box.

Click '''OK'''.
|| Select the centers of both the circles and click '''Constrain Horizontal Distance '''tool.

Change the length to 200 mm.
|-
|| Click and hold the middle mouse button and move the mouse.

(look for the four sided- move cursor)
|| Let us move the drawing to a convenient place to see it clearly.

Press and hold the middle mouse button to see the move cursor.

Move the mouse and place the drawing at a convenient location.
|-
|| Select '''Create arc''' tool.
|| Now select the '''Create arc''' tool.
|-
|| Place the cursor on the center of the left circle.
|| Place the cursor on the center of the circle.

You can see that midpoint changes to yellow color.

An X-shaped symbol appears near the cursor. 

This denotes that the cursor is at the midpoint of the circle.
|-
|| Click the midpoint and draw a semi-circle from bottom to top.

Semi-circle should be on the left of the circle
|| Now click on the midpoint and draw a semicircle from bottom to up.
|-
|| Click the midpoint of the right side circle and draw a semicircle.

Semi-circle should be on the right of the circle.
|| Repeat the same process on the other side.
|-
|| Click the midpoint of the plane. 

>> draw one arc at the top and another at the bottom.
|| Let’s draw two more arcs above and below the plane from center of the plane.
|-
|| Select the '''line''' tool.

Join all the arcs one by one.
|| Now, select the '''Line''' tool and connect all the arcs.

Make sure to click only when the X-symbol is visible.
|-
|| Select the top left line and the top arc.

Select the '''Constrain Tangent tool'''.
|| Now select a line and the arc and select the '''Constraint Tangent''' tool.

This makes the connection between the arc and line smooth .
|-
|| Select a line and the arcs.

Select the '''Constraint Tangent''' tool.
|| Repeat this process for the arcs and lines at four points to make them smoother.
|-
|| Select the top arc.

Click the arrow near the '''Constrain arc tool'''.

Click '''Constrain radius tool'''.

In the radius field type 75 in the dialog box.

Click on '''OK'''.
|| Now select the top arc and click '''Constraint radius''' tool 


Set the radius to 75 mm.
|-
|| Click '''Constrain radius tool'''.

In the radius field type 75 in the dialog box.

Click on '''OK'''.
|| Let us change the radius for the bottom arc also.
|-
|| Select both the circles.

Click '''Constrain radius''' tool.

In the radius field type 10 in the dialog box.

Click on '''OK'''.
|| Now select both the circles and click '''Constraint radius''' tool.

Change the radius to 10 mm.
|-
|| Select both the arcs around the circle.(left and right)

Click '''Constrain radius tool'''.

In the radius field type 30 in the dialog box.

Click on '''OK.'''
|| Select the arcs around the circles and change the radius to 30 mm.
|-
|| Click '''Close''' in the '''Combo''' '''view'''.
|| Click '''Close''' in the '''Combo view'''.

You will exit the sketch view
|-
|| Select top in the '''Gizmo'''.
|| Now select the '''Top view''' from the '''Gizmo.'''
|-
|| Select '''Pad tool'''.
|| Select the '''Pad''' tool from the tool bar.
|-
|| point to the sketch
|| You can see that the sketch will turn into a 3D object.
|-
|| In the length field type 20 in the dialog box.

Click on '''OK'''.
|| In the '''Combo view''' change the length to 20 mm.

This will increase the thickness of the drawing making it 3 dimensional.

Then click the''' OK '''button.
|-
|| Press and hold both the middle mouse button >> right click and move the mouse.
|| Let us rotate the drawing.

Press and hold the middle mouse button.

Right click and move the mouse.

Or you can change the view using the gizmo.
|-
|| Click '''Create sketch.'''

Select '''XY-plane (base plane)'''

Click on '''OK.'''
|| Again click '''Create sketch'''.

Then click''' XY-plane'''.

Click the '''OK button'''.
|-
|| Select the '''View section tool.'''
|| Select the '''View section''' tool to clearly see all the points.
|-
|| Draw a circle from the center of the plane.

Select the circle.

Click on '''Constrain radius tool'''.

In the radius field type 50 and click OK.
|| Now draw a circle from the center of the plane.

Set the radius to 50 mm.

Click the '''Close '''button.
|-
|| Select '''Model tab.'''
|| Go to the '''Model tab '''in the '''Combo view.'''
|-
|| Select the sketch.
|| Select the sketch if not already selected.
|-
|| Select '''Pocket tool.'''

In the '''Combo view''', type 20 in the length field.

Check the '''Reversed''' check box.

Click on '''OK button'''.
|| Now select the '''Pocket tool''' from the tool bar.

'''Pocket''' tool is used to create holes in already existing drawings.

In the '''Combo view,''' change the length to 20 mm.

Tick the '''Reversed '''check box.

Click the '''OK button'''.
|-
|| Change the view to front.
|| Now change the view to front using the gizmo or from the tool bar.
|-
||Point to the 3D component.
|| The 3D component is ready.
|-
|| Click '''File''' and '''Save'''.

Enter a '''Name''' and click '''Save'''.
|| Now let us '''Save''' the file with an appropriate name.
|-
|| Only Narration.
|| With this we come to the end of this tutorial.

Let us summarize.
|-
|| '''Slide 8'''

'''Summary''' 
|| In this tutorial, we have learnt to,
* Draw basic shapes.
* Use basic constrains.
* Draw the '''Flange Coupling''' component in 3D.
|-
|| '''Slide 9'''

'''Assignment''' 
|| For the assignment activity, please do the following:
* Practice to draw different shapes.
* Practice pad and pocket tool.
|-
|| '''Slide 10'''

'''About spoken tutorial project'''
|| This video summarizes the spoken tutorial project.

Please download and watch it.
|-
|| '''Slide 11'''

'''Spoken tutorial workshops'''
|| We conduct workshops using spoken tutorials and give certificates.

Please write to us.
|-
|| '''Slide 12'''

'''Forum '''
|| Please post your timed queries in this forum.
|-
|| '''Slide 13'''

'''Acknowledgement '''
|| Spoken tutorial project was established by the ministry of education government of India.
|-
|| '''Slide 14'''

'''Thank you''' 
|| This tutorial is contributed by Dr. Sathiya Narayanan and K.Sakthivel.
Thank you for joining.
|-
|}