Preliminary Detailed Design
Team Vision for Preliminary Detailed Design PhaseWhat did your team plan to do during this phase?
- Continue developing/iterating CAD models
- Iterate BOM
- Determine number of actuators being used for translation
- Determine the actuator being used
- Determine the PLC being used
- Determine driver(s) being used
- Determine the functionality of the locking mechanism
- Figure out lead times of parts needed
- Meet with Dave Cicero to further understand electrical aspects
- Create electrical schematics
- Iterate risk assessment
What did your team actually accomplish during this phase?
- Developed rough electrical schematics
- Determined the number of actuators being used for translation (1)
- Found promising options for actuator. Need to make final decision on this.
- Determined driver to be used must be the same as what the other fixtures are using. (Kinetix 5500/6500)
- Determined PLC series
- Had a successful meeting with Dave Cicero answering questions listed below
- Part lead times have been determined and identified on BOM
- Risk assessment was iterated
- Download the PLC programming software
- Start learning the PLC programming software
- Start learning how ladder logic works and how to apply it
Prototyping, Engineering Analysis, Simulation
- Total mass of moving component (work piece + moving fixture): 317.5kg
- Translation speed: 0.1mm/min
- Maximum speed: 2mm/min
- Maximum work piece size: 400mm (L) x 320mm (W) x 300mm (H) = 92kg (for most dense material)
- Maximum moving fixture dimensions: 400mm (L) x 340mm
- Height has not yet been determined
- Maximum travel distance of actuator: 457.2mm
Drawings, Schematics, and Flow Charts
Electrical Control System
A PLC series was chosen for our control system. From this series, a specific model must be selected. We have been advised to explore the functionality of the model being released at the end of this year prior to finalizing a decision. Below are the option currently available. All have the option for expansion modules which will give us access to more than enough I/O ports for all three teams.
Motion Analyzer Snap Shots
Questions answered by Dave Cicero:
- Do we need distance/velocity sensors in addition to
the feedback being provided by the linear actuator?
- No, the feedback provided by the actuator should be reliable
- Would you suggest we use over travel switches?
- Again, feedback provided by the actuator should be sufficient
- Is it necessary for us to be measuring the
temperature of the actuators with a thermocouple?
- Yes, in case of over heating. A thermocouple will work perfectly.
- What do you think our best option is to use for the
- How do we get started with the PLC software?
- Youtube videos on ladder logic
- Willing to meet with us to get us started.
- How do we design our panel layout/schematic
- Third party companies can do this for us (i.e. Agile, Zeller, etc.)
- What does the price range look like for what we have
discussed? (Including motors, drives, and PLC)
- Around $100k
Assembly in the Down Position
Assembly in the Up Position
Assembly with the Box Removed
The Fixture Mount
Front View of the Fixture Mount
Front View of the Dovetail
The Mounting Plate
Front View of the Mounting Plate
Bill of Material (BOM)
Technical Design Decisions and Analysis
Actuation System Design Process:
- Ultimately, the setup with one linear actuator and three linear guide rails was chosen.
Fixture Mount Design Process:
In this phase we originally had two ideas for the way this fixture was going to be enclosed, the "Small Enclosure" and the "Tall Sheet Metal Box." After discussing the pros and cons of each we reached a new idea for having the extra studs for stability when we are guiding the fixture.
Locking Mechanism Design Process:
To view our live document, click here.
Plans for next phase
To view our live document, click here.