156B Week 7

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Analysis in report will be done by Tuesday, May 16th.

  • Design is done except the homing sensors drawing. Their placement are designed.

  • Fabrication is almost done except the finger and the cam.

  • Stepper motors are tested and proved as functional. But the stepper motor is not well compatible with the stepper motors.

Accomplishments from Previous Week

• • Most parts of the pressers are almost fabricated.

  • Report rewriting is ongoing.

  • Stepper motor control debugging tests were performed more. But the problem remains unsolved.

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • CAM, finger are fabricated by Yueqi Wang.

  • Report is rewrited by Yiren Shao, Yueqi Wang, Yingzhi Yang.

  • Writing assistance contact by Rong Bao, Yiren Shao.

  • Stepper motor and brushed DC motor programming test by Yueqi Wang.

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Discussed different types of homing sensors choices and decided to use chassis mount type sensor. (May 9th in person) 

  • Approved the design of presser and purchased materials for the presser. (May 9th in person) 

  • Discussed the worm gear torque ratio. (May 9th in person) 

  • Discussed schedule for presentation at sponsor. (May 9th in person) 

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • Standard extrusion at 90 degrees, so no need to bend metals (No sharp corners); Talk to Tom first. (May 8th, in person)

  • Photogate pin compatibility.(May 8th, in person)

  • More analysis (on CAM), e.g. how many degree to linear motion, torque output. (May 8th, in person)

  • Use past tense in the report; Gramma issue. (May 8th, in person)

  • Leave out off the report if it is not our concern. (May 8th, in person)

  • More details on the picture's explanation, any figure attached should be referenced in the text. (May 8th, in person)

  • Top view of the motion gantry to show the timing belt; need more figures to explain details of the design. (May 8th, in person)

  • Make degree symbol bigger. (May 8th, in person)

  • Tolerance for control requirements. (May 8th, in person)

  • Refer to appendix for the choice made (May 8th, in person)

  • OSHA standards for safety (how much one can carry) (May 8th, in person)

  • Include the details of the spring presser design. (May 8th, in person)

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • Not applicable since last presentation

Risks and Areas of Concern

• • Control of stepper motor. 

Resources or Information Required but not Available

• • Fabrication method of cam. Already talked to Tom, Yueqi Wang will go to machine shop on Monday, May 14th to continue working on cam.

  • Board programming debug. Will talk to the sponsor again.

Schedule

• • Meet with instructor on Monday May 15th.

  • Meet with sponsor on Tuesday May 16th.

  • Modified report due on Friday May 19th.

Budget (list amount spent and amount remaining)

• • Spent: $700.

  • Remaining : $300.

Progress on Report and Webpage

• • Report rewriting is ongoing.