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15 Commits (531d178044909e8badc7362277df74766680c05b)
 

Author SHA1 Message Date
alex 531d178044 fff: let air flow from sidecup bottom through LCD wall left face 2 years ago
alex f2c0c72e16 fff: add power cord and sd card access slots at the rear face 2 years ago
alex 27f6c9104f fff: add a side compartment part to close the gap
the part is called sidecup. this is where cables reside, and possibly
a custom PCB or a battery pack in the future.
2 years ago
alex df29aa2bfd fff: combine walls and the bottom plate to form a box
makes it easier to 3d-print in the end.

the plate and walls are still separate parts - easier to work on
separately. it is also possible to even 3d-print them separately, in
which case add a 0.5mm to clearance and plate mount Z in the params
sheet.
2 years ago
alex aceae05b6e fff: correct rpi board and top heatsink Z in provcase assembly
were off by ~3mm lower. this will actually make a good Z for top/bottom
heatsink spacer of about 5-6mm.
2 years ago
alex 81440fd637 fff: add walls around LCD to provcase
with a standard M2 30mm PCB standoff for LCD, the walls' Z seems
to magically settle on a nice round number of 48mm.
2 years ago
alex 7c73301bd7 fff: improve and split the assembly into a separate file
this makes it a lot easier to work on a part and look at it in the
assembled view by simply switching tabs. the separate file links to
the original provcase.FCStd. so, need both files to work on the assembly.

it is now possibly to simply select "exploded" or "assembled" option
from a "view" property of the top level assembly std part: no need to
manually modify the asmsheet. the property config is in the same
spreadsheet.

display standoff length now correctly offsets the LCD, the board and top
heatsink while leaving the rest in place. so, it is very easy to change
the overall height.

this change also applies 4.3inch LCD updates from 0c42295 with correct
rpi board mount screw holes, since the LCD master sketch in the
assembly is a copy.
2 years ago
alex 0c42295ff2 assets: correct waveshare 4.3inch LCD rpi board mount points
turns out either the original design is inaccurate or the freecad STEP
import didn't work well: the rpi mounting screw holes were off but some
sub millimeter length: 58.2x49.05 vs 58x49 actual.

see rpi drawings in
https://datasheets.raspberrypi.com/rpi4/raspberry-pi-4-mechanical-drawing.pdf
2 years ago
alex 654d843983 fff: adjust base plate to match the SSD PCB mount pins
the SSD PCB sits very nicely now. the heatsink model has a pad at the
bottom but it is not the case with the actual sink in use.
will remove it later.

the change also makes the base plate shorter, right about the size of
the display: will be splitting the box in two to allow printing within a max
circle area of 140mm diameter.
2 years ago
alex 8890e1f618 assets: add a master sketch to waveshare 4.3inch LCD
this also means the STEP file is replaced with a freecad native file
format.

the master sketch comes in very handy when designing mount and other
constructions around the LCD.
2 years ago
alex 9f082cd5f4 fff: add the sdssde30-1t00 pcb to the assembly
it shows in fact that the ssd pcb mounting pins in the provcase bottom
part are slightly misplaced. will adjust in future commits.
2 years ago
alex 1acdb2f30f assets: add a simple model of sdssde30-1t00 pcb
very simple, contains only the essential bits dimensions of which play
important role in the case design due to size restrictions.

there are two std parts: regular with sketches with sketches to
construct the body, and a simple refined version for the provcase
assembly.

the regular variant also has a master sketch to aid in defining
constraints in the provcase design.
2 years ago
alex ddc0711c74 fff: add bottom sink screws to the assembly
the standard hex with low head M3x10; comes with the display pkg.
2 years ago
alex 310795898a fff: align all parts in the assembly
all are parameterized via the asmsheet which now includes
a calculation for an exploded view.

while there, added the missing display standoffs.

what's still missing is:

- SSD board
- heatsink top/bottom spacers
- outer case walls and mount holes
2 years ago
alex 928bab8f0c initial import
certainly not ready for broad consumption yet.
just sharing very early designs with friends.
2 years ago