[WEEK11] Machine Design

Link to the MTM global webpage of our team is here.

0. Overview



I mainly made the following sections.

1.Mechanical design

I designed mechanism to push up pins.
I adapted rack and pinion mechanism because it was simple and could be rapidly made. A stepper motor turns pinion gear, and rack gear is pushed up.
I used the following site to generate gear data.
Involute Spur Gear Builder


It was set as follows.



I couldn't open the DXF file downloaded from this site with illustrator directly .So I opened it with Inkscape and converted it to SVG file.



And then, I edited the shaft hole design to fit tightly in the shaft of stepper motor with illustrator.



I deisgned a body with Fusion 360.



The internal design is as follows.






I assembled all the parts and attached a stepper motor.



Download

pinpusher_gear(.ai): Download the file
pinpusher_body(.ai): Download the file
pinpusher_spacer(.ai): Download the file

2.Electronics & Programming

I designed electronic circuit and wrrote program that the rack gear goes up and return to the origin.
I used Aruduino UNO and the following devices.



I wrote the program as follow.



reliefProtterZmotor.ino

Finally, another member integrated this program into the machine program.


Download

reliefProtterZmotor.ino: Download the file

3.Box redesign

We made a prototype with cardboard priviously. Next, I modified some parts and designed data for MDF.





Attached a bearing

The friction of the shaft part was large, and a lot of load was generated when the motor was in operation. So I attached the bearing to make rotation smoother.



3D print clip

In order to prevent the side wall of the box from spreading, I attached the box clips.



Download

base_complete(.ai): Download the file
base_bottom(.ai): Download the file
gantry_complete(.ai): Download the file
boxClip(.iges): Download the file