Sebastiaan FabAcademy

Week 17 Applications and Implications

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A lot of things of this weeks assignment I already have done in the 17 weeks that have been past. I knew from the beginning that my leafBot project was a big project and I didn't want to come in time troubles in the last 2 weeks. Before the fabAcademy has startet, I have looked to the weekly assignments and from the first week I knew what I had to do for my final project to be able to work for most of the assignmenst on the an subject of the LeafBot. My planning on when I had to design the different parts of the LeafBot was coherent to the planning of the FabAcademy. The Leafbot is designed to show all the technics my FabLabEnschede has to offer. The LeafBot design will be used to showcase the technics and skills of the FabLabEnschede and of course what my knowledge is and what I have learned. In the weekend of 28-29 of May 2016 I have showcased the Leafbot and weekly assignments of the maker festival Enschede in the Netherlands.

For this week I will use the the questions of the week 17 assignment and answer them:

Propose a final project that integrates the range of units covered, answering:

What will it do?

I will design and build a robot that is able to sweep leafs from an lawn and collect the leafs in a storage volume inside the robot. The design proces is explaned in my final project website concept development. From the beginning I have made special Final project website to show the development of my final project. The sequence of the pages is the sequence I have followed during the fabAcademy.

Who's done what beforehand?

It is my personal project and I designed the leafBot myself. The sweeping system is copied from an standard leaf sweeper like Agri-fab. The construction of the LeafBot is designed in a way that it can be build with the FabLab technics and machines. This design proces started after the first offical Lesson of Niel in week1. The sketches are included in the Final project website.

What materials and components will be required?

The Leafbot will be build from different materials. As said before, I will use the different technics that are avaliable in the FabLab. The main structure is made out of 18 mm concrete milled plywood.
The leaf storage volume is made of 6 mm beech laser cutted plywood
The brushes are bought and changed to fit in the LeafBot. See Final project website for the explanation why the brushes have been reworked.
The axle of the brushes is made out of metal and is been reworked on an drilling machine to drill holes and is been turned on a turning machine, with I have in my personal workshop
The front cover is made out of thin aluminium sheet. Is was used for printing office. The sheet I used is an recycled part. To see how I made it click on this link The joints where the tilting parts are connected to, are been printed in PLA on an Ultimaker 2.
The frontsuspension part is casted from Smooth-on PU PMC790 resin see Making parts
The frontwheel are standard wheels. The goal for me in the FabAcademy is not the learn how to make wheels, but focus myself more on the electronics withs is totaly new to me.
The rearwheels are bought from an hoverboard. I needed big wheels with high torque to be able to drive smoothly on my lawn.
The cover will be made out of burlap. In Week14 the proces of making the cover is decribed.
The electronic will be designed in week 18 and week 19.

Where will they come from?

The plywood is sourced localy in Enschede and is bought new from an wood supplier Jongeneel
The front wheels and brushes are bought from an local toolshop Probin Goor
I sourced The metal parts in my own workshop
The hoverboard wheels are bought from an online company hoverboardz
The PLA filament is from Colorfabb
The casting materials are coming from FormX in Amsterdam
Electronical components are ordered online from farnell
The bearings coming from Brammer Hengelo which is also localy sourced

How much will it cost?

What parts and systems will be made?

I made the most of the parts myself, only the wheels are been bought. The rest of the LeafBot is made in the FabLab. See Final project website.

What processes will be used?

The leafbot is designed to use all the FabLab technics. In my Final project website and the weekly assigment webpages every process is discribed in detail

What tasks need to be completed?

The Robot is able to drive on its wheels and the sweeping is also been tested. The sweeping works very well see testing the leafbot. The next thing that has to be done is design and build the electronics to be able to control the LeafBot.

What questions need to be answered?

How to design the PCB to be able to drive the LeafBot with an radio controlled remote control.

What is the schedule?

Untill now I am exactly where I planned to be as I planned in week 1 of this FabAcademy. My plan was to have the hardware ready in week 17, so I can focus the last two weeks on to the electronis of the LeafBot

How will it be evaluated?

Because I worked in avanced, I had time to test the sweeping and suspension and tilting mechanisme to emty the leafBot. So changes like the front suspension have been made. If the electronics have been made, then the Robot will be tested on my lawn. During the Autum I collected a lot of leafs to be able to test the Robot in June.

Projects can be separate or joint, but need to show individual mastery of the skills covered where possible, you should make rather than buy the parts of your project

Only the wheels and brushes are the parts that are been bought, the rest is made with all the different FabLab technics