Xerography Derek Meinke (ME, PM) Matthew Liff (ME) Tony Zhang (EE) - PowerPoint PPT Presentation

P10511: Miniaturization of Xerography Derek Meinke (ME, PM) Matthew Liff (ME) Tony Zhang (EE) Zaw Htoo (ISE)

Customer Requirements Pareto 14% 12% 10% 8% 6% 4% 2% Weight 0%

Engineering Metrics Pareto 16% 14% 12% 10% 8% Weight 6% 4% 2% 0% Charger Gap Surface Budget ($2k) Drum Size Surface Charger Type Dielectric Uniform ESV distance Voltage (1-2mm) Charge (-300 (24-84mm) Speed (BCR or Thickness Erase Charge (1-2mm) Input (5-8kV) to -800V) (≤1m/s) Scorotron) (~25µm) (-100V)

Risk Assessment Pareto 8.00% 7.00% 6.00% 5.00% 4.00% 3.00% 2.00% 1.00% Weight 0.00% -1.00% Link to Risk Assessment Table rev2

EE Wiring Schematic

Detailed Design Iso

Detailed Design Iso • Almost all parts are the same thickness for feasibility of manufacture (10mm). • Vertical components will be mounted onto an aluminum jig plate. • Vertical components will be supported with L- brackets or gussets.

Detailed Design Charger

Detailed Design Charger • Interference with charger or charger mount components with photoreceptor end caps. • Charger wires binding with mount components when sliding for alignment. • Sliding placement with gapping blocks.

Detailed Design Motor

Detailed Design Motor • Moment created from heavy photoreceptor motor. • Interference from photoreceptor motor cradle with smaller ESV motor underneath. • Collars for photoreceptor motor to shaft and ESV motor to lead screw.

Detailed Design Photoreceptor

Detailed Design Photoreceptor • Spring selection for correct compression to eliminate slippage. • Bearing selection • Angle of V-flanges on endcaps. • Notch in shaft, notch in endcap, key insert for driven side.

Detailed Design Erase

Detailed Design Erase • Thin metal bar to support erase light. • Bend for no interference with endcaps. • Notches for discrete placement (~1 inch gap).

Detailed Design ESV

Detailed Design ESV • Bearing selection. • ESV mount guide design (delrin or aluminum?). • Lead screw, re-use current part.

BOM • EE BOM presented at systems design review • ME BOM – Jig plate – L-Brackets – 10mm thick steel – Bearings – Motor coupler – Delrin/aluminum – Graphite brush

LabVIEW State Diagram

Score in Max. Comments, Target, Deliverable (weight) Score* Excellent/Very Good Good/Acceptable Barely acceptable Unacceptable Week (#) Score Date Completed BOM is complete, and long lead time items and BOM is imcomplete, most items X BOM is partly complete - some specifics still remain to be defined. Bill of Materials (9) 3 vendors have been identified. not specified. (1-2 points) (3 points) (0 points) X All drawings for parts to be manufactured are Most drawings or schematics are Few, if any, drawings or Some drawings are complete, others are complete, assembly drawings demonstrate that complete, assembly drawings are schematics exist beyond hand Drawings/Schematics (9) 5 not done or require modification. system assembly is feasible. nearly done. sketches or concept drawings. (1-2 points) (5 points) (3-4 points) (0 points) Detailed Design X Most design features have Significant analysis has been done to demonstrate convincing support, some require Many design features require further Little analysis has been done to feasibility of all systems/components. Appropriate Feasibility Analysis (9) 7 further work. Link to risk analysis to demonstrate feasibility. demonstrate feasibility. links to the risk assessment activity are complete. assessment partly complete. (2-3 points) (0 points) (6-7 points) (4-5 points) As detailed design phase has progressed, the Risk Assessment and actions to X Plans are not in place to initial list of risks has been reviewed and updated. Plans are in-place for to monitor and take action on most of the key risks the reassess and minimize the minimize risks - Detailed Design (9) 3 Actions that could be taken to minimize risks have plans and analyses are missing some key elements. impacts of risk. been taken and documented. ( 1-2 points) phase (0 points) ( 3 points) Superficial understanding of the General comprehension of the design is design is evident at either the Thorough and in-depth understanding is evident of Good understanding is evident of Knowledge & understanding of evident but rationale for decisions is not system or subsystem level. X the design (system & relevant subsystems) and the design and rationale for most (9) 7 solid and tradeoffs are not well Rationale for specific design design rationale for design decisions and tradeoffs. design decisions and tradeoffs. understood. decisions and tradeoffs is poorly (6-7 points) (4-5 points) (2-3 points) understood, if at all. (0 points) Detailed Design Team demonstrated that most Sufficient evidence is presented to demonstrate X Plan to meet Customer customer needs and design specs Team demonstrated that some needs Many questions remain as to that customer needs and design specs will be met. will be met. Test plan has been and specs will be met, but others require whether needs and specs will be Needs/Engineering Specifications (9) 7 This includes development and documentation of developed but could be more significant further analysis. met. There is no test plan a preliminary test plan using the suggested format including a Preliminary Test Plan specific (2-3 points) (0 points) (6-7 points) (4-5 points) Design Review was not held or Design Review was very well planned and was poorly executed: key X executed with appropriate attendees. All Design Review execution was acceptable but was weak in one or more subsystems were not reviewed, Detailed Design Review execution (9) 5 subsystems discussed, key issues addressed, areas: breadth of participants, preparation, thoroughness, or documentation. key issues were not addressed, notes and action items documented. (1-4 points) little/no preparation or (5 points) documentation. (0 points) Detailed Design Review represents 37 37% of your MSD 1 Grade

Action Items = Busy Week • Obtain wireless PCI card from John Wellin. • Make computer functional for LabVIEW code. • Further follow-up with Rob Kraynik on concept feasibility. • Finish CAD parts: ESV guide, PR shaft key, motor shaft collars. • Create part drawings. • Create ME Bill of Materials. • Further review Risk Assessment.

Questions?