From f39cf459f2b539e4ef7919989ed31f382f98cc9e Mon Sep 17 00:00:00 2001
From: Roberto Alsina <roberto.alsina@gmail.com>
Date: Thu, 21 Jul 2022 21:25:32 -0300
Subject: [PATCH] inicial

---
 notebook_casera/README.md |   8 ++
 notebook_casera/modelo.py | 189 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 197 insertions(+)
 create mode 100644 notebook_casera/README.md
 create mode 100644 notebook_casera/modelo.py

diff --git a/notebook_casera/README.md b/notebook_casera/README.md
new file mode 100644
index 0000000..00e91bf
--- /dev/null
+++ b/notebook_casera/README.md
@@ -0,0 +1,8 @@
+# notebook_casera
+
+Cosas de mi proyecto de notebook casera
+
+Por ahora:
+
+* modelo.py es el modelo, hecho en CadQuery
+* Los archivos STL son lo que el modelo genera
diff --git a/notebook_casera/modelo.py b/notebook_casera/modelo.py
new file mode 100644
index 0000000..d4fdf7b
--- /dev/null
+++ b/notebook_casera/modelo.py
@@ -0,0 +1,189 @@
+import cadquery2 as cq
+from cadquery2 import exporters
+from math import floor, atan, pi
+
+# Naming convention
+# _l means Y
+# _w means X
+# _h means Z
+
+
+shell_t = 2  # Shell thickness
+front_h = 25  # height at the front (near user)
+back_h = 40  # height at the back (away from user)
+width = 290  # width of the whole thing
+fillet_s = 4  # Fillet of case sides
+
+kbd_base_l = 150  # length of the front half of the case
+screen_base_l = 100  # length of the back half of the case
+kbd_angle = atan((back_h - front_h) / kbd_base_l) * 180 / pi
+print("kbd_angle=", kbd_angle)
+
+# Added an extra 1mm on each direction for tolerance to make sure it slots in
+kbd_w = 202  # width of the keyboard itself
+kbd_l = 127  # "length" of the keyboard
+kbd_h = 4  # depth of the keyboard holder cutoff
+kbd_fillet = 10  # width of the kbd corner fillet
+
+# battery dimensions (mx7)
+bat_w = 60
+bat_l = 140
+bat_h = 22
+
+# width, length VISIBLE WITHIN THE BEZEL
+screen_w = 223
+screen_l = 57
+screen_left_margin = 10  # Distance from the left of the case to screen cutout
+# width, length, height INCLUDING_BEZEL
+display_w = 233
+display_l = 65
+display_h = 5
+# Distance from the left of the case to display end (7 is bezel width on that side)
+display_left_margin = screen_left_margin - 7
+# Distance from the right of the case to display end
+display_right_margin = width - display_left_margin - display_w
+# Distance from the top of the case to display top
+display_top_margin = (screen_base_l - display_l) / 2
+display_bottom_margin = display_top_margin  # Symmetrical
+
+kbd_cutout = (
+    cq.Sketch().trapezoid(kbd_w, kbd_l, 90).reset().vertices().fillet(kbd_fillet)
+)
+
+bat_holder_top = (
+    cq.Sketch()
+    .trapezoid(bat_w + 2 * shell_t, bat_h + 2 * shell_t, 90)
+    .trapezoid(bat_w, bat_h, 90, mode="s")
+    .trapezoid(bat_w + 10, bat_h - 10, 90, mode="s")
+)
+
+# Base to hold (magnetically?) the keyboard (half the case)
+kbd_base = (
+    cq.Workplane("left")
+    .lineTo(0, kbd_base_l)
+    .lineTo(front_h, kbd_base_l)
+    .lineTo(back_h, 0)
+    .close()
+    .extrude(width)
+    .edges("+Z")
+    .fillet(fillet_s)
+    .edges("+Y")
+    .fillet(fillet_s)
+    # Cut kbd holder area from top face
+    .faces(">Z")
+    .workplane(centerOption="CenterOfBoundBox")
+    .center((screen_w - width) / 2 + screen_left_margin, 0)
+    .placeSketch(kbd_cutout)
+    .cutBlind(-kbd_h)
+    # Make it hollow
+    .faces("<Y")
+    .shell(-shell_t)
+    # Add battery holder
+    .faces("<Y")
+    .workplane(centerOption="CenterOfBoundBox", offset=-1)
+    # The final constants are fudging because it impinges on the surface
+    .center(
+        -(width - bat_w - 2 * shell_t) / 2 + 1,
+        (back_h - bat_h - 2 * shell_t) / 2 - 0.25,
+    )
+    .transformed(rotate=cq.Vector(-kbd_angle, 0, 0))
+    .placeSketch(bat_holder_top)
+    # The 3 is fudging so the bottom of the holder doesn't
+    # impinge on the bottom face
+    .extrude(-(bat_l - 3 * fillet_s))
+)
+
+# Slots for ventilation, applied at the bottom of the screen base
+ventilacion = (
+    cq.Sketch()  # slots are 3mm separated 5
+    .rarray(8, 6, floor(width / 9), 1)
+    .trapezoid(3, 0.8 * screen_base_l, 90, mode="a")
+    .reset()
+    .vertices()
+    .fillet(1)
+)
+
+screen_cutout = (
+    cq.Sketch().trapezoid(screen_w, screen_l, 90, mode="a").reset().vertices().fillet(1)
+)
+
+shelf_cutout = (
+    cq.Sketch()
+    .trapezoid(width - 2 * shell_t, screen_l, 90, mode="a")
+    .reset()
+    .vertices()
+    .fillet(1)
+)
+
+screen_lateral_stop = (
+    cq.Sketch()
+    .rarray(display_l - 2 * shell_t, 1, 2, 1)
+    .trapezoid(2 * shell_t, display_h + 2 * shell_t, 90, mode="a")
+)
+
+screen_vertical_stop = cq.Sketch().trapezoid(width, 2 * shell_t, 90, mode="a")
+
+# Holder for the screen (other half of the case)
+screen_base = (
+    # Basic filleted box shape
+    cq.Workplane("bottom")
+    .lineTo(-width, 0)
+    .lineTo(-width, back_h)
+    .lineTo(0, back_h)
+    .close()
+    .extrude(screen_base_l)
+    .edges("|Y and <Z")
+    .fillet(fillet_s)
+    .faces(">Y")
+    .shell(-shell_t)
+    # Account for outer shell thickness in offset
+    .faces(">Z")
+    .workplane(offset=-display_h - shell_t)
+    # Add friction shelve for screen assembly
+    .lineTo(-width, 0)
+    .lineTo(-width, -screen_base_l)
+    .lineTo(0, -screen_base_l)
+    .close()
+    .extrude(-shell_t)
+    # Cutout visible screen area from top face
+    .faces(">Z")
+    .workplane(centerOption="CenterOfBoundBox")
+    .center((width - screen_w) / 2 - screen_left_margin, 0)
+    .placeSketch(screen_cutout)
+    .cutBlind(-shell_t)
+    # Cut screen "shelf" to allow for cable routing
+    .faces(">Z")
+    .workplane(centerOption="CenterOfBoundBox", offset=-display_h - shell_t)
+    .placeSketch(shelf_cutout)
+    .cutBlind(-shell_t)
+    # Stop the screen from sliding back and forward
+    .faces(">Y")
+    .workplane(centerOption="CenterOfBoundBox")
+    .center(0, back_h / 2 - display_h - shell_t)
+    .placeSketch(screen_vertical_stop)
+    .extrude(-display_bottom_margin)
+    .faces("<Y")
+    .workplane(centerOption="CenterOfBoundBox")
+    .center(0, back_h / 2 - display_h - shell_t)
+    .placeSketch(screen_vertical_stop)
+    .extrude(-display_top_margin)
+    # Stop the screen from sliding left and right
+    .faces(">X")
+    .workplane(centerOption="CenterOfBoundBox")
+    .center(0, back_h / 2 - display_h - shell_t)
+    .placeSketch(screen_lateral_stop)
+    .extrude(-display_left_margin)
+    .faces("<X")
+    .workplane(centerOption="CenterOfBoundBox")
+    .center(0, back_h / 2 - display_h - shell_t)
+    .placeSketch(screen_lateral_stop)
+    .extrude(-display_right_margin)
+    # Place ventilation grid in bottom face
+    .faces("<Z")
+    .workplane(centerOption="CenterOfBoundBox")
+    .placeSketch(ventilacion)
+    .cutBlind(-5)
+)
+
+exporters.export(screen_base, "screen_base.stl")
+exporters.export(kbd_base, "kbd_base.stl")