Overview of Status of Analysis, Design, Fabrication, Tests, etc.
3D Printing in the works
X and Y stages are coming along
Work is starting to be done on theta stage
Manipulation of Solidworks designs given to us by sponsor about to start
Accomplishments from Previous Week
New prototypes created
New CAD/Solidworks models
Updated/Revised Design Constraints (See sponsor notes section)
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Obtaining estimate from a DXF file sent to Wire EDM manufacturer (Sean)
Purchase Squiggle motors (Dylan & Razi)
Updating Website (Sean & Julie)
3D Printing Prototypes/Designs/Concepts (Razi & James)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Linear slides: Bearings might have a slight slop. We also need to have the rails cut down.
Keith's new design (muscle wire)
· L-shape flexures soldered to top and bottom of stages
· no machined parts
· cheapest solution
· no sliding surfaces
· flexures/bias springs
· apply squiggle motors to this design
Squiggle Motor:
· The price of $99 when ordering 2500 is almost a show stopper.
· follow up with Squiggle company for exact force on the motors
Constraints:
· go with +/- 0.5 mm of travel
· and +/- 1° for theta
· Still waiting on 50 lbs of force. <-- as of 4/10 we no longer have any vertical force
· 32 mm2 chips
Independent stages:
· We do not need to use independent stages
· True X, Y, and θ is traditional, but adds to height
independent stages might not work- too many sliding surfaces
Wire EDM might be too expensive. Look into sheet metal flexures/ laminate
Use 3D printing for communication purposes. Since it is not precise, we will not get a working part out of it.
Might want to go straight to wire EDM.
Look into 17-7PH stainless steel
· sensitive to chlorine (soldering)
· get around this by nickel plating
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
For next time:
· bring presentation with comments from Delson to meetings
· bring comments from other students
· Color code the L-shaped solidworks drawing (stationary and moving parts)
Motors:
· stepper motor, piezoelectric, and DC rotational- understand the technologies behind these motors
· Bring comparison table and spec sheets
· 1 lb of force is still questionable
· try to clearly understand the physics behind the squiggle motor
Flexures:
· why a separate stage? Is there an advantage?
· why not a floating stage?
Serial Manipulator- One actuator moves other actuators
Parallel Mechanism- Motors are mostly stationary. One motor does not have to move others. Kinematics are more complicated. Stewart Platform
For rotary motors- Look into lead screws
Wire EDM:
· 2 on campus options
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
N/A (See notes from Final's Week)
Risks and Areas of Concern
Getting the Squiggle motors
Cost
Lead Time
Resources or Information Required but not Available
N/A
Schedule
Milestone:
3D Printing Prototypes
Discovering new design constraints for the aperture
Budget (list amount spent and amount remaining)
See Budget Section
Progress on Report and Webpage
Progress Reports being updated
Website is being updated