Build & Test Prep
Table of Contents
Team Vision for Build & Test Prep Phase
During this phase, we planned to close out any outstanding issues related to design left over from MSD I. We began ordering parts for the control system, began to determine additional items we will require, and worked on the issue of power to the latch mechanism.
MSD I Wrap-Up
The above image shows a log file that Maxim DL generates while in use. Inspecting the columns further, we realize the values generated are a reference to where the star is located on the CCD chip. This information is not currently useful to use because we cannot back generate out where it is pointing still but may be useful down the line if we require this information.
Latch Torque Arm Hook Design Update
Redesigned Latch Torque Arm Hook - Reduces Risk of Loss of Chain Engagement
- Should slippage still occur, a backup metal piece can be adhered or welded to the outer edge of the hook to catch a fully disengaged chain.
Motor Mount Design Overview
- To properly align the main motor so that the hook
engages the chain, a very simple mount must first be
constructed with the properties below:
- Material: Treated wood (to prevent warping and rotting)
- Basic Structure: Simple Ramp
- Ramp Angle: Less than 10°
- Style: Solid or Frame
- Below are rough sketches of the solid and frame styles; an overly complicated design is excessive and completely unnecessary for the desired outcome.
- Mini Electric Motors:
- Flexible Piezoelectric Pressure Sensor:
- Capable of withstanding forces up to 100 lb
- One will be used to detect latch engagement and a second will be used to detect shutter door connection.
- Source Link
- Hinges can be found at most hardware stores or any online hardware store; sourcing will be finalized once environmental testing is complete, however, four plausible unhampered test hinges currently exist should they be needed earlier.
- Thread for Hook-Mini-Motor Connection:
- For prototype testing, fishing line should be sufficient, where testing can conclude whether a new material is required.
- Can either be purchased online or many students are known to have supplies of it.
The following contains a list of approximate costs related to the finalized latch torque arm mechanical design shown previously:
- Main Motor: $18.00 Motor + $56.50 Gearbox
- Mini Electric Motors: $10 - $13 each (x2)
- Material Cost (Al 6061): ~$0.80/lb on average, total for 1.2 lb ~ $1.00 (Stock will cost more for total material)
- Wood can most likely be found all over campus for free.
- 100 lb Flexible Piezoelectric Pressure Sensor: $19.95 (x2)
- Usable hinges already exist, but additional ones generally cost less than $3.00 per pack of two.
- Fishing line can be acquired from students for free, assuming their supplies still exist at the moment.
Note: All costs exclude any additions due to shipping and handling.
Power Supply Concept
Test Plan Summary
Click here to view details on all existing test plans.
Risk and Problem Tracking
Risk Management Document: Risk
Plans for next phase
Ahmed Alhurubi's Three Week Plan: Ahmed's Goals
Joe Brescia's Three Week Plan: Joe's Goals
Raymond Castro's Three Week Plan: Ray's Goals
Wilson Quizhpi's Three Week Plan: Wilson's Goals
Sarah Williams's Three Week Plan: Sarah's Goals