Overview of Status of Analysis, Design, Fabrication, Tests, etc.
The homing sensor installation is done. The slider under moving product holders are printed. Will be tested on Monday.
Second draft of report is done.
Homing sensors circuit is built and tested. They are functional. But it is still not perfectly compatible with the SNAP board.
The speed, precision, and other relevant tests of stepper motors, scissor lift height change test, and product holder motion precision are performed. Homing sensors are tested. The test of cam is ongoing.
Accomplishments from Previous Week
Made the stepper motors compatible with the SNAP board.
Installed and tested homing sensors.
Redesigned the circuit.
The wires are reorganized.
Strengthened the cam stage mount.
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Program tests of cam by Yueqi Wang.
Make the poster by Yiren Shao, Yueqi Wang. Reviewed by Yingzhi Yang
Talk to the writing center by Rong Bao, who made the appointment.
Program GUI using default python library by Yueqi Wang.
Improve the stability of the product holder by Yueqi Wang and Yingzhi Yang.
Modify the report based on feedback by Yiren Shao, Yueqi Wang, Yingzhi Yang.
Prepare for the presentation at the sponsor in Week 10 by the team.
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
The sponsor showed that the stepper motors were compatible with SNAP board.
Discussed and brainstormed the improvement of the product holder slider.
Approved the strengthening method of the cam stage mount.
Discussed the details and modifications on report.
Discussed the schedule of presentation at the sponsor.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Dr. T asked to remove the sharp corner on the assembly.
Dr. T suggested to check motor's duty cycle and how fast the pressing motion can go.
Dr. T asked to use shear stress instead of compression stress on contact stress analysis.
Dr. T asked to increase the resolution of the CAM contour profile.
Dr. T suggested redesign the 3D printed cylinder container; Be careful about the possible friction; Also, plot output force vs. cam rotation.
Dr. S asked to define 'fast' and clarify the speed of the motion stage.
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Guiding system for 3D printed cylinder container, since it is under-constrained.
Try to clarify the cam profile.
Risks and Areas of Concern
The actual test result of the cam.
The success of programming a GUI.
The compatibility of homing sensors. Should by resolved by Wednesday.
Resources or Information Required but not Available
The compatibility of homing sensors with SNAP board. Right now, if the sensor is triggered, the stages would not move. But it could not stop in time if the sensor is triggering while the stage is moving. There is a source code for driving the motor, which is not found yet. It is somewhere in the files that the sponsor provided. The information would be clarified during the meeting with sponsor.
Schedule
Meet with sponsor on Tuesday (5/30)
Meet with instructors on Tuesday (5/30)
Budget (list amount spent and amount remaining)
Spent: $708
Remaining: $292
Progress on Report and Webpage
Second draft and second version of webpage are done.
The test of cam would be added as soon as it is available.
The BOM and part list would be updated from uploaded files on the webpage into tables on the webpage.