Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Fabrication and assembly of table continues
Minor rework of table design
Now using joining plates to attach angled 80/20 t-slots together
Tested raising mechanism and guide rails
Smooth raising - like butter
PCB will be delivered sometime this week
Accomplishments from Previous Week
Budget was increased from $1500 to $2000
Fabricated more fasteners
Fabricated 30 deg, 60 deg, and 45 deg joining plates
Plates will be used to connect the angled t-slot supports
This replaces previous design which involved milling t-slot ends to correct angle
Trespa fabrication:
Milled slots into Trespa sheet to accommodate vertical t-slots
Finished drilling holes into Trespa sheets
Assembled table enough to test linear sliders
Tested with table top attached
Initial testing suggests jamming is not a problem
Lead screw was able to be turned with one finger. Felt very smooth
Worked on Report Draft 2
Bought leveling feet to support center of table (will reduce max deflection significantly)
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Finish Report Draft 2 (All)
Update website to v2 (All)
Prepare for Preliminary Design Review presentation (All)
Finish fabricating skeleton of table (Johnny, Rick)
If finished with skeleton begin adding extra components (Height tracking stick, paneling, shelving, etc.) (Johnny, Rick)
Attach positioning system and associated components to table (Johnny, Rick)
Solder components to PCBs (Krishna, Jake)
Test PCBs to ensure functionality (Krishna, Jake)
Design controller box (Krishna, Jake)
Fabricate and assemble controller box (Krishna, Jake)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Shorten shelf height. Remove drawers from shelf design (In person 15 May)
Action taken: Modified CAD model
$500 Budget increase request approved (In person 15 May)
Purchasing assorted test cables no longer our responsibility. CFMRI will purchase them from usual supplier (In person 15 May)
Add ruler (or other marking stick) so table height change can be tracked easily (In person 15 May)
Action taken: Modified CAD model
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Worried about jamming of linear sliders (guide rails) (In person 14 May)
Action taken: Assembled table enough to test linear sliders. During initial testing jamming was not a problem. Lead screw was able to be turned with one finger. Felt smooth "like butter." Further testing will be performed to ensure accuracy
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Not applicable this week
Risks and Areas of Concern
Newly ordered PCBs working
Possibility of table jamming under heavy load
Initial testing suggests no jamming under light centered load (Morning 21 May)
Resources or Information Required but not Available
None at this time
Schedule
Report Draft 2 (Friday 22 May)
Website v2 (Friday 22 May)
Preliminary Design Review presentation (Thursday 28 May)
95% completed table (Friday 29 May)
Budget (list amount spent and amount remaining)
$1500 of $2000 spent
Progress on Report and Webpage
Working of Report Draft 2
Working of Website v2