Showing posts with label AutoCAD. Show all posts
Showing posts with label AutoCAD. Show all posts

Monday, 27 February 2017

[2017] Dobbybot: A Battlebot under $32

Dobbybot in the hands of our skillful driver: Praga
For a battlebot competition, we decided to build a bot under 30$. Clad in stainless steel plates for armour and a flipper arm powered by 12 kgcm servo motors, production cost was 32$. 

The Design


I was responsible for structural design. I made multiple mechanical designs and finally used my 3-wedge sided, very low profile (7 cm high) version. The robot competed with other robots that cost 300$ and won the 3rd place. My wedged design with low center of gravity and almost zero ground clearance was commended for its uniqueness and novelty by the judging panel.

The frame of the robot

Scaled drawing of how the parts fit together


Making


We took the robot 100 km away from the university, to the hometown of Chinthana for welding. We got the stainless steel plate free from his relative.








 Designs and Documents





Saturday, 27 December 2014

[2015] Designing a 3 Story House in AutoCAD 3D

This model is quite complex: a house with 25 rooms, 35 windows and 28 doors that took about 250 working hours (25 days) with AutoCAD. 

2D plan of first two levels of this house was provided to be drawn as the final project in AutoCAD 2D course. When the drawing was completed, I started to draw the 3rd level according to the customer’s specifications and allowed me to make some additional designing choices such as the placement & alignment of staircases and columns. 

When I began AutoCAD 3D, I decided to make this three storeyed house as a fully detailed 3D model with complete roof frames, glass added windows… etc. 

Modelling alone took about 150 hours and then the texturing process (floor tiling, adding wood materials to carpentry, grass, glass…) took about 90 more hours of work. Each scene in the following presentation took 20 minutes to render.



Rendering & Other Details



One Hundred and Thirty (130) virtual lights were used in the project. Most were weblights. Resulting intensity of each was 510,000 Cd. Filter colours of all lights were set to white to bring out the real colours of objects.

I used virtual cameras with focal lengths of 50mm and 30mm (although 50mm provides the most natural-looking images, 30mm was used to increase the field of view). Forty nine such cameras were used to set the views on interior and exterior shots. With that, the rendering process began, and it required about 30 min to fully render a single shot in average. 85 shots were taken in total (about 100 hours were spent solely on rendering).

As shown on the right, the model is organized into 34 3D layers (61 layers in total). Manipulating layers also helped to prepare the house-building animation shown at the beginning. More than two thousand individual objects (more than 1500 3D solids) were drawn for the project.  About 80 materials were used in texuring.

Plan & Elevation


More Projects