12. Mechanical Design, Machine Design

Information shared by Neil and other instructors during the Global Lecture

• Nervous System where Nadia was giving the lecture

• Machine Agency

• DOLD Mechatronik

• Gear Generator

• The Tech Behind Hope

• Making Things Move

• Why Machines That Bend Are Better

• The Way Things Work: A Visual Guide to the World of Machines

• Simple Core XY Pen Plotter

• Micro S type load cell SC301A

• Micro S type load cell SC301A Data Sheet

• Inline Load Cell 100kgf

• Inline Load Cell 100kgf Data Sheet

• MAKERGAL G-Slot

• MAKERGAL Mecanica

• Popfab

• Stepper Motor Video

• The Threadless Ball Screw Never Took Off, But Don’t Write It Off

• CBA Tools

• Tutorial KinematicSkeleton

• How to perform kinematic motion analysis of revolution based on joints in Fusion 360

• Machine Design “Fish-petting Machine”¶

at last week’s review

• LoRider- the Meshatastic

• Computer controlled machining

• Making bulletproof wood

• Scientists create ‘Superwood’ that’s stronger than steel

• Open Metrology

Individual Work

In our Machine Week activity, we set our assignment as follows;
* Daisuke Hanamido designs;
* Test Piece Base
* Motor controlling circuit with programming
* Data handling
* Video Editing

• Kohshi Katoh myself design;
  • Concept of Young’s Modulus Measurement Machine
  • Push Rod with measurement feature; Load cell, Potentiometer
  • Frame Structure focusing measurement accuracy and system durability
  • Presentation Panel

Concept Designing

Here under is my initial sketch of Young’s Modulus Measurement Machine.

The machine consists of following parts;
* Test piece base which can supports 150mm length of test piece with the support pillars distance as 100mm

• 3D printing Push Rod with tip at the edge and Load Cell installed in the middle as series to the tip

• Potentiometer set at the main frame with the connection of a string attached to the fixation point at the frame via spring in series.

• Push Rod connected to the Stepper Motor via Screw shaft and Coupling

• Push Rod with the Load Cell moves down by the Stepper Motor’s rotation through Screw Shaft, and Measure the Load and Displacement by the Potentiometer pule as the angle.

How the system works:

1. The system should detect the first contact with load cell’s load signal, then stop and rise up a bit as the initial measurement position.

2. Then start measurement by Push Rod moving down until the Load Cell detects the Load level decreasing 10% of the peek load value, then stop.

3. The system will record the date of Load Cell, time, and potentiometer and save those data with CSV file format.

4. CSV file data will be calculated by Excel like PC application to get the Young’s Modulus Peek Value, and Graph is shown as the Young’s Modulus in vertical axis and Displacement as the horizontal axis.

Designing Push Rod with measurement feature

I started designing of Push Rod by referencing the [Onigiri Machine()]’s Push Rod which was designed by Shoko Kudomi.

Selecting Load Cell and amplifier from following choice;
* Micro S type load cell SC301A

• Inline Load Cell SCA106

• Full Bridge Micro Load Cell SC134

• HX711 Arduino wiring video

Designing Frame for Second Spiral

Designing Bearing fixation part