Fablabbombay | Sudarshan Kondgekar

Working with LibreCAD

Making a snowflake on Librecad

Following commands used

Line : Two point line
Scale : Which scales selected object with reference point which we define [Menu : Modify -> Scale]
Move : Moves selected objects using reference point [Menu : Modify -> Move]
Rotate : Rotates selected objects from reference point [Menu : Modify -> Rotate]
Trim : It trims line intersected by another line [Menu : Modify -> Trim]

LibreCAD Move, Rotate, Copy

I found it very useful where LibreCAD provides options to output multiple copies. Its actually an array which you can generate using these options

Delete Original : Remove original objects and Move / Rotates
Keep Original : Keeps original objects and Copy / Rotates
Multiple Copies : Creates Cartesian array in case of Copy and creates polar array in case of rotate

Created initial structure at 60 degree apart

Used tools are line tool and rotate tool which created polar array of objects

Created line at a distance 20 mm from center

This is to take as a reference to create another geometry

Created leaf geometry and rotated

Leaf geometry is created and rotated at an angle of 60 degree.

Copied geometry using copy tool

Copied the geometry to create multiple geometries

Geometries are scaled and trimmed

Scaled and trimmed to form a single leaf like shape. All other shapes are deleted

Rotate with multiple copies

Used rotate tool to create multiple copies of leaf to form a snowflake. Also added minor details to snowflake

Using trim tool to trim intersections

Minor details which were intersecting are trimmed using trim tool

Final Snowflake using LibreCAD

Exploring and working with Solidworks

Solidworks I found really easy and user friendly to work with. Obviously because of proprietary software and huge team of exprts involved in developement of Solidworks

Working with Sketch in Solidworks

Drawing lines and apply constraints

Sketcher in solidworks I found that it can automatically puts constraints as I draw. Those green symbols in screenshot is a constraints applied for current entities

Fillets, Trims, Dimensioning in sketch mode

Converting 2d sketch into 3d solid using extrude command

In assembly mode. I had imported existing component for multiple times

After activating "mate" command from tool bar. I have selected surfaces to align in two different components and it shows an option to Coincident, Parallel or Perpendicular

Based on entity selected solidworks provide options to add constraints to align those two components. In case of conflicts it shows conflicts too.

Finally entire thing is assembled

Files for download

Plate Solidworks Models.zip DXF Plate Drawings.zip

Creating Final project model using solidworks

Making outer box

Bottom plate section is extruded from rectangular sketch and then another sketch is drawn to extrude over the previous object. This has formed a box shape as shown

Creating a reference plane and support

To support board from bottom. I have created a reference plane

Revolve to form conical support

Sketch is drawn on reference plane and using revolve tool conical shape is created

Sketch is created wit 15 deg angle for cone

15 deg angle is provided at bottom spport to give it a more strength

Created another sketch on same reference plane

Kept hole of dia 1.3 at the center so that this support is actually being used for clamping of board

Second conical surface

Second conical surface can be seen here

Created another two cylinders

Revolve tool to create cone

Used wireframe view to see interiers

Used solid mode to see how its actually going to look

Drilled hole at the top of cone for clamping of board

Extrude cut to form opening

Created a sketch on side of a box to form semi circular hole

Create two of such holes

Created extruded notches at the side of a box for snap fitting purpose

This is how notches looks in wireframe mode

Creating top cap

Under assembly mode. Added a new component and created a sketch as shown below

Skethc extrude to form a plate

Another sketch extrude to form hollow box shape

Snap fit jaws are created and extruded

0.4 mm interference kept for snap fitting.

Extruded jaws are aligned with extruded notch to snap fit

Extrude cut from top surface to trim snap jaws

This is how jaws are lookign after extruded cut

Clamping lug is created

Extrude cut is used to reduce its thickness

Final ultrasonic slave module case is ready

Started master board casing

Box extrude to form a box shape

Used a sketch and then extruded

This is to form hollow within box shape

Hollow section is extruded

Sketch created at the sides to create opening for LCD

Sketch is then extrude cut to form an opening

This is how its looking in solid

Sketch created at back wall

This opening is for inserting wire from back side

Use of distance tool

Distance tool is used to check distance and checked if board can be mounted within box

Second notch to insert another set of wires

Both the notches can be seen in screenshot

Created projected notches for making snap fitting

Created extruded jaws for snap fitting

Sketch is created originating from side of a top plate

Jaws are then trimmed using extrude cut feature

This is how it look like

Created locators to prevent top plate from moving

This is how top plate is then mounted over master board box

Inverted upside down. This is a final position of a box

All components are taken in assembly mode

All sub assemblies are then taken in another assembly

Mounting ring is then created in assembly mode

Cavity is created in mounting ring

This is to fix 3d printed slave board on mounting ring

Mounting ring is then edited separately

All required reference planes are created

Pockets are then mirrored and total 4 pockets are created

For fixing of 4 slave boards

Master board is also placed at location

Extrude cut is used to create pocket for master board

This is how it looks in wireframe mode

This is how it looks at final

LCD opening is at the front

Files for download

3D Design Files made using Solidworks

DesignsSolidworks.zip

Exploring Blender to make model for moulding and casting assignment

Use Numpad 7 Key for top view

Numpad 5 toggles between perspective and ortho mode.
Press numpad 5 to be in ortho mode.
Insert line and press Tab to enter in edit mode.
Press ctrl tab and select vertex select mode.
Select vertex and press E to extrude.
Make a shape as required. as shown in screenshot

Extrude vertex to form a required Shape

Add more points at curve and less points at straignt edge.

Draw complete outline as required

Add another line geometry

Add another line at the middle which is used for generating required geometry. This line is then raised up to make emboss effect

Join two points

Select two vertice points and press F to join those points by line.

Created line joining two vertrice points

Create faces

Select two Edges and press F to create a face joining two Edges

Create remainaing faces to form a geometry

Create thickess to model

Select a set of edges and press G to grab and move edges. Press Z to constraint movement to Z axis only.
Manually move edges up to form required thickness and geometry

Use modifiers

Add mirror modifier to create mirrored geometry
Add subsurf modifier to create smooth surface of geometry

Basic completed model for batman symbol

Created fabacademy sumbol

Using same technique where I had extruded vertrices and joined edges with faces. I have created this symbol. Selected all vertrices and extruded to form a thickness to it.

Creating letters

Created characters S and K using text tool of blender

Crerated parting plane

Created parting plane at the center of model. SO as to create cope and drag can be created

Form a rectangular mould cavity

Risers are also created. Same are used for pouring of casting material

At the bottom it looks like this

Bottm part is a cope and top part is a drag. At this point I had made another copy of this file and removed all unnecessary geometries and formed cope and drag.