This page explores the progress to date for the 2021 E-Box design. The progress changelog starts from March 5, 2021 as the e-box frame went over a drastic redesign, and progress on the old frame design was made obsolete.

OUTSTANDING ITEMS

Task: Buy 1/4" and 1/8" acrylic sheets for lid and second level laser cutting (to be completed once campus lockdown is over)
Assigned To: Jasmine Milan (or anyone else on campus)
Estimated Completion Date:01 May 2021 (when campus lockdown ends)
Task: Get the lid laser cut. DWG in fab folder in GrabCAD (MR21-EB-013-AHu)
Assigned To: Austin Tailon Huang (Deactivated) (or anyone else on campus)
Estimated Completion Date:01 May 2021 (when campus lockdown ends)
Task: Print the remaining power pole mounting powers (6x MR21-EB-008-JAM)
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 05 Apr 2021
Task: Determine if there are issues with the 3D printed hinges, address issues if they arise and get them printed (2x MR21-EB-003-MAG, 2x MR21-EB-004-MAG)
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 10 Apr 2021
Task: 3D print the small lid strain reliefs (2x MR21-EB-004-JAM)
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 10 Apr 2021
Task: 3D print the large lid strain relief (1x MR21-EB-003-JAM)
Assigned To: Former user (Deleted)
Estimated Completion Date: 17 Apr 2021
Task: 3D print the fan finger guards (4x MR21-EB-018-AHu)
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 10 Apr 2021
Task: 3D print the custom second level mounting standoffs (2x MR21-EB-017-AHu)
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 10 Apr 2021
Task: 3D print the large insulating standoffs for the e-box frame (2x MR21-EB-015-AHu)
Assigned To: Former user (Deleted)
Estimated Completion Date: 17 Apr 2021
Task: 3D print spacer for handle latch (1x MR21-EB-014-AHu)
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 10 Apr 2021
Task: Update the connector place holders (USB and Ethernet) to reflect actual real life models
Assigned To: Jasmine Milan
Estimated Completion Date: 10 Apr 2021
Task: Update lid and fasteners to use low profiles rather than countersunk flat heads in CAD
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 06 Apr 2021
Task: Get vicor model from Andrew and put it in the CAD
Assigned To: Austin Tailon Huang (Deactivated)
Estimated Completion Date: 06 Apr 2021
Task: Update the connector place holders (USB and Ethernet) to reflect actual real life models
Assigned To: Jasmine Milan
Estimated Completion Date: 10 Apr 2021
Task: Finalize second level layout and laser cut second layer piece (this needs to be done with electrical in person
Assigned To: TBD
Estimated Completion Date: TBD

PROGRESS CHANGELOG

Date	Entry By	Category	Description	Photos
05 Mar 2021	Austin Huang	Design work	-Changed from panel + bracket design to sheet metal folded welment for box cage as per DEMTOOL recommendation	--
06 Mar 2021	Austin Huang	Design work	-Changed to 0.06" aluminum stock size from 0.125" to allow lightest weight possible for box with integrated PEM fasteners. 0.06" thickness also recommended by DEMTOOL fabricators	--
06 Mar 2021	Austin Huang	Design work	-Added floating PEM nuts where possible	--
07 Mar 2021	Austin Huang	Design work	-Changed cutout arrangement on front panel to be collinear and make dimensioning/drafting easier	https://drive.google.com/file/d/1N09VJlMtJqP1k0ctObdn8rsOCYhyBTn4/view?usp=sharing
08 Mar 2021	Austin Huang	Testing	-Printed out PP75 and PP15 connector mounts and verified design compatibility	https://drive.google.com/file/d/1mOEV_tIviqRacl9V4E0k38bJpZEeyZdM/view?usp=sharing
09 Mar 2021	Austin Huang	Design work	-Added 3d printed spacing plate to ensure handle mates with latch properly (MR21-EB-014-AHu)	https://drive.google.com/file/d/1koiq2B3c5_KjrVf1s7W5OjIfySod6zhl/view?usp=sharing
10 Mar 2021	Austin Huang	Design work	-Designed 3d printed standoffs to mate with chassis frame, to insulate box from frame as metal fasteners provide an electrical contact point (MR21-EB-015-AHu)	https://drive.google.com/file/d/1H6pcw0b5p6n93d0g3QvuGgrAW6v9efqm/view?usp=sharing
12 Mar 2021	Austin Huang	Design work	-Sorted out powder coating details, and will powder coat box with gray coat to fully insulate. Gray gloss is reflective and low absorption for Utah radiant heat	--
14 Mar 2021	Austin Huang	Design work	-Added laser engraved logo to acrylic lid	https://drive.google.com/file/d/1gdgDdSWNKEybTDUQ_NevmjVaY4UF97cu/view?usp=sharing
14 Mar 2021	Austin Huang	Fabrication	-Made first draft of fabrication drawing	--
15 Mar 2021	Austin Huang	Design work	-Changed from stainless steel floating nut to standard CLA (aluminum) nut. Avoids possible corrosion cell between nut and box by matching material	--
16 Mar 2021	Austin Huang	Design work	-Spec'd out IP54 rated 120mm fan filter to provide airflow within the ebox while protecting box from dust intake	--
18 Mar 2021	Austin Huang	Design work	-120mm fans too big for ebox walls, so changing to 80mm fans. Spec'd out low noise fans 80mm fan with 40ppm filter guard. Not IP rated, but full IP rating isnt available for this fan size and is likely overkill for our box.	https://drive.google.com/file/d/1ZdVsyUPntdI0wBcyHV8lU0SQcgTiWv4X/view?usp=sharing
19 Mar 2021	Austin Huang	Design work	-Added second level to EBOX for better routing. Still need to rearrange layout inside the box, but will get to that soon	--
20 Mar 2021	Austin Huang	Design work	-Inserted weights for OTS components in ebox	--
20 Mar 2021	Austin Huang	Design work	-Updated drafting drawing for fab	--
21 Mar 2021	Austin Huang	Design work	-Discovered miscommunication with molex connectors, and that cables will not actually be mounted to face of box. Redesigned cutout to use adaptable cable tie rack mount for any cable (MR21-EB-019-AHu)	https://drive.google.com/file/d/10Hrvq9TkgUa7zFNBdpsDQnjzZY3ORyyK/view?usp=sharing
23 Mar 2021	Austin Huang	Design work	-Discussed fan CFM with melvin, and decided to select higher noise, larger high CFM fans. Concern was raised that previous fans did not provide sufficient air recycle rate to prevent the jetson from throttling in Utah. -Also decided to use finer filter on intake fan and courser filter on exhaust fan to promote better dust expulsion within the ebox	--
24 Mar 2021	Austin Huang	Design work	-Designed 3D printable fan finger guards for inside of E-Box (MR21-EB-018-AHu)	https://drive.google.com/file/d/1JmE2j44RajsC8M1XCkSJRHhF4WvF6s-m/view?usp=sharing
25 Mar 2021	Austin Huang	Fabrication	-Finalized drawings and ordered E-box, E-Box Order History (2020-2021) (ORDER COMPLETED)	--
27 Mar 2021	Austin Huang	Fabrication	-Printed cable tie mounts (MR21-EB-019-AHu) -Also updated FAB drawing to reflect some redlining done by Demtool. As per their recommendation, did not use CLA nuts and used zinc plated SS nuts as CLA nuts strip very easily.	https://drive.google.com/file/d/1iBqVJdt_y5l070qSjyEnL3Exb7rA5myU/view?usp=sharing
28 Mar 2021	Austin Huang	Design Work	-Designed 3D printed standoffs for custom second level placement (MR21-EB-017-AHu). They include a drafted nut pocket for the board screw, and small ducts on the bottom face for adhesive (hot glue) to flow into. Also slightly oversized, as hopefully acrylic will deflect and the standoff fit will be tight -Added COCAR to assembly and arranged second floor in theorized arrangement in CAD.	https://drive.google.com/file/d/1HXlWfhuFuPSmSQQxuoYn3RVs0LPLTe9_/view?usp=sharing
29 Mar 2021	Austin Huang	Fabrication	-Ordered all outstanding McMaster/Digikey components	--
30 Mar 2021	Austin Huang	Testing	-3D printed detachable hinges (MR21-EB-003-MAG, MR21-EB-004-MAG), found clearance issues when mating them together although it is likely due to bed warping. Need to reprint and investigate after fixing warping	https://drive.google.com/file/d/1reFW9jQ_qV09xu4P3N8ZXoCBGWGdpPLq/view?usp=sharing
31 Mar 2021	Austin Huang	Design Work	-Made DXF for second level, updated box standoffs to be single printed unit rather than two pieces (MR21-EB-015-AHu)	https://drive.google.com/file/d/1BDvW3LWn9pc1eq7-TRSj2f_XOsmQRRVQ/view?usp=sharing
03 Apr 2021	Austin Huang	Design work	-Added vicor to CAD	--
04 Apr 2021	Austin Huang	Fabrication	-Printed the handle space and strain reliefs for lid, and extra PP75 mount	https://drive.google.com/file/d/11otGdqX3lipCnho2339H4GzRWFocqAQU/view?usp=sharing
05 Apr 2021	Austin Huang	Fabrication	-Printed remaining PP15 mounts	https://drive.google.com/file/d/1NIEffY5LOy7YhIi7Jd61q5W7Y7U2t4f7/view?usp=sharing
06 Apr 2021	Austin Huang	Fabrication	-Updated lid fasteners in assembly -Started to print out fan finger guards (1 complete)	--
08 Apr 2021	Austin Huang	Fabrication	-Finished printing all the finger guards for the fan	--
09 Apr 2021	--	--	-Ebox has been delivered!	https://drive.google.com/file/d/1RjxUxCY5uxUT-xpRd0s8caOgYYKbpI7l/view?usp=sharing
10 Apr 2021	Austin Huang	Fabrication	-Printed standoffs	https://drive.google.com/file/d/1hqqIOG3UVyOs27ItFCdVq2dXB9LVPfUc/view?usp=sharing
11 Apr 2021	Austin Huang	Fabrication	-Printed hinges. Hinge design was fine, I just had to upgrade/optimize some stuff with my prints to get them to mate correctly	https://drive.google.com/file/d/1fPnJFiqf__AQJg4Ca8Iio0UTfXvS_0up/view?usp=sharing

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