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Make It Extreme (Engineering/Construction)


17 / 09 / 2016 | Videos

Rotary Positioner Table



Another very useful tool was added to our workshop with the structure that we made this time. 
It is a ‘positioner table’ that can be useful for a great range of areas related to the making of structures. The role of the particular table is to spin a metallic plate on the right and on the left according to which way the stepper is pressed. 

This table is able to spin the metallic plate from 0 degrees- 100 degrees with spinning speed already regulated. It may sound quite simple and not useful at all but imagine to manage stable welding while the piece is spinning in gradual speed. I can ensure you that the welding will be easier implemented automatically and much more uniformly. Equally easy would be if we put a router in a stable place while spinning a piece of wood, then we would immediately get a trimmed wooden perfect-shaped circle. Additionally, it would be also easy if we had the plasma cutter still while spinning the metallic plate. These are only some of the multiple utilities of the particular table as using your imagination, its functions are countless. 

Everything started when a friend gave us a gearbox that is capable of making the 10 spins in just a single one. Then, we found a dc motor from an old fitness machine and we connected it with the gear box. Therefore, the motor with the use of a speed controller could be spinned with 0-3000 spins so when it was connected with the gearbox, it was exited with 0-300 spins. From the gear box, we managed to make an axis of 65cm on which the metallic plate was applied and it is also the surface of our project. This axis is also supported by another two bearings in order to achieve even higher endurance. As the already mentioned pieces were connected, they were placed on an axis with 40mm thickness that has the potential to spin all the pieces made from 0 degrees to 100 degrees. Using a crank and a shaft that is covered with screw threads, (the screw threads begin from the one side of the shaft reaching the other side), we made a system that when the crank is spinned, the whole system spins as well as a result we get the inclination that we need to work on. All these are moving on a metallic base that was made of square tubes with dimensions of 50mm x 50mm x 2mm. On this metallic base, we also placed a mechanism which is role is when the position is chosen and it is the proper one to work and bolt the screw, the table is stabilized completely and securely. 

One of the advantages of our own design of table is that when it is positioned in a horizontal place at the 0 degrees, two surfaces are appeared that you can work on both, one at the front side and one at the back side of the table. In particular, at the back side you may have a chuck and be able to put smaller objects while at the front side, where the surface is bigger to work, you can place bigger in size objects. 

The motor that was placed to move the table left and right, uses two contactors that are activated by pressing the two steppers. The steppers are made of aluminum sheet metal while their covers are made of plain sheet metal. Additionally, above the steppers, there is a board where the switches are placed. One of the two switches is there for an emergency in case a problem is arisen and it can be pressed to deactivate any function in progress.  While the other is to activate the whole mechanism and the potentiometer placed next to it, regulates the spinning speed of the metallic surface of work. Regarding future uses of the structure, various bases where made that many supporting tools and machines can be placed multiplying the potential uses of our structure. Concluding, in this way we managed to implement another project of the make it extreme team with a great success. Therefore, our workshop is one step ahead being more fulfilled. 

Also, we believe that the particular structure was worth our time and efforts not only for the satisfaction gained during making it but also for the great usefulness of the particular tool.









































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08 / 09 / 2016 | Videos

Angle Grinder Hack 4 (portable edition)



This time by using the battery angle grinder, we managed to make an improved version of the angle grinder hack 4

We decided to use the particular angle grinder as it has a protective mechanism which automatically stops when more power than the one allowed has been exerted.

Therefore, we are protected from any accidents that might happen in case the tree-cutters make a kick back and the chain hits the human body. 
After the experiment that we had done on the previous hack, we found it necessary to lubricate the chain bar as well as the chain itself in order to avoid the rising of the temperature of both the bar and the chain. Doing this, we managed to increase the existence of the chain. The lubrication is achieved using an automated mechanism that when it orbits, it releases a quantity of oil on the chain derived from a pot that is placed on the chain bar. Another important advantage of this structure is that is portable so that the user is able to move it around easily and cut the wood that he needs to use. 

However, its only disadvantage is its limited power and consequently, only a small chain bar and a cutting chain can be used. 
In this way, we managed to make a very light, portable chainsaw, with which we will be able to cut wood in small pieces and prune trees and bushes easily and silently.

Although, the power is obviously less than the equivalent hack 4, the advantages overweigh in a great extent the disadvantages as well as it provides much more security than the previous version.













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31 / 08 / 2016 | Videos

Coil Engine (experiment)



The new experiment of the ‘make it extreme’ team is the making of a machine that will be able to revolve using electromagnets. 

To start with, we first collected 4 electromagnets having the total power of elevating an object weighing 200kg. Then, we placed the electromagnets in an immovable, metallic piece that was the basis of our machine. Next, we put a movable metallic material above the electromagnets that it declines due to the attraction caused by the electromagnets and it returns back to the primary point with the help of a spring. Doing this small, retrogressive move and using a system with gears, we are causing a constant, revolving move at the final point of our machine. Achieving this revolving move, our goal has been obtained moving a wheel of a bicycle. Therefore, although the wheel was being moving slow, this goal has been successfully obtained. Thus, besides the experience and the joy that we gained making this machine that is very precious and priceless to us, we came into our conclusions, as well. We concluded that we managed to make the most simplified kind of machine that gives us move very easily. Also, the electromagnets and their effectiveness as well as the way they move and they were placed, they form hundreds of combinations in order to increase the performance of the electromagnetic motor to be absolutely functional and effective. 

Accomplishing the particular experiment, made us make plans for the future thinking to make a vehicle that will be moved by electromagnets since we are very satisfied by the outcome we got by the particular project.
Maybe if we made a camshaft, the revolving move would be faster and smoother. To complete this project, we used electromagnets of 12volts with 50mm diameter.























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21 / 08 / 2016 | Videos

Gasoline engine aluminium boat



An especially distinctive structure has been created this time by our team approaching it from different views both structural and functional. Besides our structural interest of creating it and the development of our knowledge and experience, our main aim was our entertainment while making it. We decided to make our own small, aluminum boat that will be able to carry only an individual in the sea providing him the sensation that he is surfing by just using a gasoline powered engine. 

Firstly, we started our structure by cutting aluminum iron plates into pieces conglutinating them air tightly. In this point, we should say that our preference for the aluminum material was made for its great endurance and its light weight. Therefore, we had the opportunity to experience how to conglutinate aluminum using a mig welder. After connecting the aluminum pieces, we gave them the shape of a small boat keeping its upper surface closed and flat. Then, we had to place the engine at the back of the boat and put a propeller at its end. Next, using the lathe we made all the essential pieces in order to place the axis and the propeller on it and the particular pieces were connected to the engine of our boat. 
We chose an engine that was taken from an old tree-cutting company and it has been repaired before used. Our aim was to connect the engine to our structure without causing any damage in order to be able to be restored to its former function used at the tree-cutting company. Also, we chose the particular engine for various reasons of which the basic one was its small size. Additionally, we regulated the evaporation of the engine to be made on a high point of the boat in order to prevent water going in while evaporating as well as we created air inlets to oxygenate the engine sufficiently. Moreover, we created an output where we put the rope for starting the machine. For our own safety, we made a metallic frame around the propeller. Also, we put a safety switch that is placed in the hand and it deactivates the machine when the user leaves the boat. Our boat weighs about 45kg and it is capable of displacing about 180kg meaning to sink it completely 135kg should be placed on it. At the point, where the axis sticks out of the boat, we prevented the insertion of the water using water seals. Just in case, we placed a water pump inside our boat in order to get the water out if it gets in. 

We must admit that we are very satisfied from our boat’s sailing and the way that it deals with the water. However, we felt very disappointed about the engine used as after numerous attempts and after using multiple propellers, we came into conclusion that we could not get the desirable speed and the power of the engine to use our boat as a surfboard, too.
What we can say for sure, though is that using a more powerful engine and if our structure was lighter, the outcome would be successful. Also, it would be surely more preferable if our engine was water-cooled to avoid high temperatures. Whatismore, for keeping it lighter in size, it would be recommendable to use carbon fiber that is very light in weight and has high water-resistance. In addition, instead of using a propeller, a jet mechanism would be better obtaining a better performance. In conclusion, we have notified many potentials of improving our structure and increasing its functionality and we can certainly say that we will attempt to create such a structure again considering the above potentials of improvement as due to our current budget the particular changes were not feasible to be implemented. 

Nevertheless, completing this structure, we gained more experiences and we had fun every single moment creating it as well as enjoying the sea of our country.






































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02 / 08 / 2016 | Videos

It's possible to use the angle grinder as a chainsaw


Carrying on our tradition of our video sequel for angle grinders, this fourth time we transformed our grinder into another useful machine, a chain saw. Our primary aim for this transformation was experimental while the usefulness of the particular machine came second in our priorities. 

We first did this experiment for multiple reasons such as to see if the angle grinder could really work as a chain saw, whether the angle grinder is burdened, if it gets warm and if it can be used as a last resort in case of an emergency. 

Therefore, our work starts making a metallic plate, on which the angle grinder is adapted and stabilized when necessary. On this metallic plate, we placed a metallic rail taken from an arboricultural factory as well as the chain and the gear of the particular machine. The chain that we placed on the metallic plate is revolved on a high speed without derailing its way supported by the gear that revolves the angle grinder at the particular time. This metallic rail has the potential to move towards and backwards as a result to enable us to set how tight or loose we want our chain to be. 

Then, we made a protective cover around the chain close to the parts that we place our hands in order to reduce any danger. Thus, without any special difficulty the angle grinder 4 is a fact!!!! 

After completing it and testing it, we got amazed by its performance as an electrical chain saw. Although, we consider that this was a transformation of a high risk. Also, we must say that using a bigger angle grinder, the performance will be dramatically increased. However, the advantage of this transformation is that none of the components is modified as a result they can be easily returned unchanged to their primary position, where they were placed at the chainsaw. 

To sum up, this particular transformation costs very little money and it can work in many different cases having great results. Additionally, it is much lighter than the common gasoline powered chainsaws, much less noisy with a small angle grinder and this is obvious when it is used for many hours as its temperature increases.













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