Mechanical Design

Our group shared assignment was set to be a ploter that rolls a paper in a loop
My challenge was to design the mechanism which makes the paper sheet moving forward
The design based on a mechanism Ilia ,my group colleague, took apart from a printer

We had a given belt for our machine, taking that in conclusion i started by planning the gears on which the belt will tern

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In order to rotate the pipes around themselves we used three gears one for each pipe and one for the motor. additionally we used a fourth wheel that was set in order to stretch the belt

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The second parameter i related to was the length of the mechanism that makes the marker moves “up and down” on the X axis. We used Nadia mechanism design

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After we fabricated the mechanism, we could located the belt and set the distance between the pipes

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when we put together the mechanism we indicated the mistakes we made when planning the mechanisms:
1. The holders of the marker were’nt long enough

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2. We had to set a spring for the tention wheal for maintanning the belt stretch

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3. The gears width were to tight and caught the belt

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4. Because we need the marker to move faster and to collaborate with the paper mechanism we will switch to Jens mechanism design
5. In the paper mechanism we were missing supports for the pipes holders

***In hindsight we got to know a software that we could have used for planning the mechanism gears, and we will use for the final design in order to decrease the friction between the belt and the gears

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