156B Week 9
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Results from 2D design printing: resolution is constant (about 1.0 mm), injection system works well with no leakage, issue with y axis - does not retract all the way back (maybe timing belt issue).
Waiting on convective heating fans to be completed to try 3D printing, currently fabricating the mounts.
Accomplishments from Previous Week
Stabilized the resolution of the printer
Successfully printing a 2D design
Leakage issue fixed: remanufactured the cap of the injection system
Tested convective heating fans: good air flow and heat
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Finish building and mounting convective heating fans - Jason
Fix alignment issue with y axis on printer - Roger
Work on writing an instruction manual on how to operate printer - Xin
Work on software and poster draft - Harrison
Continue testing - All
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
To include a detailed instruction manual on delivery of final design
Xin is currently working on an instruction manual
To try different mixer to see the difference in mixing and extruding
We tested a spiral and non-spiral design of the mixer and decided to use the spiral mixer because it produced a more constant flow
Attempt printing with 2D designs before attempting 3D
Tested 2D printing this weekend
It is okay to use nozzle size larger than 0.6 mm
Currently using a 0.7 mm nozzle
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Make the surface of the mixer shaft smooth to prevent leakage
We made the shaft out of aluminum and press fit the seal onto the cap. Leakage issue fixed
Look into smaller, more powerful fans
Ordered new small fans with size dimension but twice the amps
If the heated is over 50 degree C, it needs to be insulted and covered
Still working on it
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
None
Risks and Areas of Concern
y-axis of printer not aligned properly
what air flow temperature is required to effectively cure the Dragon Skin for 3D printing
Resources or Information Required but not Available
None
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
$50 extruder parts
$20 heater bed
$50 nozzle head and syringes
$30 UV lights for testing
$40 heaters
$400 UV light*2
$30 more mcmaster parts
$30 convective fans
$20 heater wire
$6 wires
$30 motor drivers
$10 aluminum sheet
$1000 syringe pump
$40 fans
~$1200 still left in our budget
Progress on Report and Webpage
Going to update them with comments from peer review.