Precision Product Design - 3D Printer

I took 2.77 "Fundamentals of Precision Product Design", a Mechanical Engineering course at MIT on precision machine design taught by Prof. Alex Slocum, during my graduate studies. My work in the course (continued beyond the class semester) involved the design and construction of a critical module of a research-grade 3D printer used in our lab to study powder bed fusion and jetting process physics. We have called the system the Hybrid Additive Manufacturing Recoater (HAMR).
 

Project - Build Platform of a 3D printer

Module design                                                                       

 

 

 

 

 

 

 

 

 

 

Module assembly

 

 

 

 

 

 

 

 

 

Module specifications

The build platform contains the moving z stage on which parts are printed, as well as a powder delivery system and a reservoir for excess powder. The build area is 75 mm x 75 mm, with 50 mm height. The stage is capable of rising in 20 micron increments, and of heating to 200 oC.

The powder delivery system requires that powder be supplied to the Datum A plate surface in increments of 1.5x the volume of the incremental powder layer on the build platform. This system assumed the same basic design as the build platform (z-actuated stage), but with a total vertical travel of 75 mm.

More details of the system can be found by visiting here for my module, and here for the group site. You will need to login using MIT Touchstone on those sites to gain access. Many of the class assignments ("PUPS") listed below involve the HAMR project and are housed on the external HAMR website.

 

2.77 Class assignments

Labs

Lab 1 (Week 1): Arduino control of LED light and stepper motor

Lab 2 (Weeks 2-4): Linear motion axis

 

Practical Uploadable Problem Sets (PUPS)

PUPS 1: Design and Free Body Diagrams

PUPS 2: Exact Constraint Design

PUPS 3: Machine Design Specs (takes you to HAMR website, MIT Touchstone access required)

PUPS 4: Kinematic Coupling Design

PUPS 5: Concept Detail Exploration (takes you to HAMR website, MIT Touchstone access required)

PUPS 6 (takes you to HAMR website, MIT Touchstone access required)

PUPS 7 (takes you to HAMR website, MIT Touchstone access required)

PUPS 8 (takes you to HAMR website, MIT Touchstone access required)

PUPS 9 (takes you to HAMR website, MIT Touchstone access required)

PUPS 10 (takes you to HAMR website, MIT Touchstone access required)

PUPS 11: Documentation (takes you to HAMR website, MIT Touchstone access required)

These PUPS were peer reviewed by:

  • Nigamaa Nayakanti
  • Dan Oropeza
  • Ryan Penny
  • Johannes Weinberg

Seek and Geeks

S&G 1: BCN3D printer 

S&G 2: TEM holder

S&G 3: Bottle opener

S&G 4: Marshall mini amplifier

S&G 5: Copper foil roller 

S&G 6: Tabletop electron microscope

S&G 7: SEM stage 

S&G 8: T red line seats

S&G 9: Plane seat table tray

S&G 10: Hand gripper

S&G 11: Carbon sputtering system