Started on the hinge

monitor/case.py

@@ -1,38 +1,7 @@
 import cadquery2 as cq
 from cadquery2 import exporters
 
-# Shell thickness
+from parameters import *
-shell_t = 3.5
-
-# width, length VISIBLE WITHIN THE BEZEL
-screen_w = 223
-screen_l = 57
-# Distance from the left of the case to screen cutout
-screen_left_margin = 7 + shell_t  #  (7 is bezel width on that side)
-# width, length, height INCLUDING_BEZEL
-display_w = 233
-display_l = 65
-display_h = 5
-
-width = 250
-height = display_h + 2 * shell_t + 1
-length = display_l + 2 * shell_t + 1
-fillet_s = 2
-
-
-# Distance from the left of the case to display end
-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 = (length - display_l) / 2
-display_bottom_margin = display_top_margin  # Symmetrical
-
-
-# Threaded insert hole dimensions
-ti_radius = 2.35
-ti_depth = 6.5
-
 
 screen_cutout = (
     cq.Sketch().trapezoid(screen_w, screen_l, 90, mode="a").reset().vertices().fillet(1)
@@ -70,8 +39,8 @@ back_reinforcement = (
 
 threaded_inserts = cq.Sketch().rarray(width / 8, 0, 4, 1).circle(ti_radius, mode="a")
 
-# Holder for the screen (other half of the case)
+# Case for the screen
-screen_base = (
+case = (
     # Basic filleted box shape
     cq.Workplane("bottom")
     .lineTo(-width, 0)
@@ -120,4 +89,4 @@ screen_base = (
     .cutBlind(-ti_depth)
 )
 
-exporters.export(screen_base, "screen_base.stl")
+exporters.export(case, "case.stl")

monitor/hinge.py

@@ -0,0 +1,49 @@
+import cadquery2 as cq
+from cadquery2 import exporters
+
+from parameters import *
+
+# M3x20 screw
+screw_l = 22
+screw_shaft = 20
+screw_head_h = 2.5
+screw_head_radius = 3.5
+screw_radius = 1.5
+
+hinge_s = 7.5
+hinge_t = 5
+hinge_gap = screw_shaft - 2 * hinge_t
+
+hinge_profile_1 = (
+    cq.Sketch()
+    .segment((0, 0), (0, hinge_s))
+    .arc((0, hinge_s), (hinge_s / 2, 1.5 * hinge_s), (hinge_s, hinge_s))
+    .segment((hinge_s, 0))
+    .close()
+    .arc((hinge_s / 2, hinge_s), screw_radius, 0, 360)
+    .assemble()
+)
+
+hinge_profile_2 = (
+    cq.Sketch()
+    .segment((0, 0), (0, hinge_s))
+    .arc((0, hinge_s), (hinge_s / 2, 1.5 * hinge_s), (hinge_s, hinge_s))
+    .segment((hinge_s, 0))
+    .close()
+    .arc((hinge_s / 2, hinge_s), ti_radius, 0, 360)
+    .assemble()
+)
+
+# TODO countersink
+# TODO proper threaded insert depth sizing
+
+hinge = (
+    cq.Workplane("bottom")
+    .placeSketch(hinge_profile_1)
+    .extrude(hinge_t)
+    .workplane(offset=hinge_gap)
+    .placeSketch(hinge_profile_2)
+    .extrude(hinge_t)
+)
+
+exporters.export(hinge, "hinge.stl")

monitor/parameters.py

@@ -0,0 +1,31 @@
+# Shell thickness
+shell_t = 3.5
+
+# width, length VISIBLE WITHIN THE BEZEL
+screen_w = 223
+screen_l = 57
+# Distance from the left of the case to screen cutout
+screen_left_margin = 7 + shell_t  #  (7 is bezel width on that side)
+# width, length, height INCLUDING_BEZEL
+display_w = 233
+display_l = 65
+display_h = 5
+
+width = 250
+height = display_h + 2 * shell_t + 1
+length = display_l + 2 * shell_t + 1
+fillet_s = 2
+
+
+# Distance from the left of the case to display end
+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 = (length - display_l) / 2
+display_bottom_margin = display_top_margin  # Symmetrical
+
+
+# Threaded insert hole dimensions
+ti_radius = 2.35
+ti_depth = 6.5

monitor/rear_mount.py

@@ -0,0 +1,56 @@
+import cadquery2 as cq
+from cadquery2 import exporters
+
+from parameters import *
+
+# Small M3x8 screw
+screw_l = 10
+screw_shaft = 8
+screw_head_h = 2.5
+screw_head_radius = 3.5
+screw_radius = 1.5
+
+
+reinforcement_height = 1 + 1 + ti_depth - shell_t
+
+back_reinforcement_cutout = (
+    cq.Sketch()
+    .trapezoid(width / 2 + 1, 15 + 1, 90, mode="a")
+    .reset()
+    .vertices()
+    .fillet(2)
+)
+
+back_reinforcement_outer = (
+    cq.Sketch()
+    .trapezoid(width / 2 + 2 * shell_t, 15 + 2 * shell_t, 90, mode="a")
+    .reset()
+    .vertices()
+    .fillet(2)
+)
+
+screw_holes = cq.Sketch().rarray(width / 8, 0, 4, 1).circle(screw_radius, mode="a")
+screw_countersinks = (
+    cq.Sketch().rarray(width / 8, 0, 4, 1).circle(screw_head_radius, mode="a")
+)
+
+rear_mount = (
+    # Basic filleted box shape
+    cq.Workplane("bottom")
+    .placeSketch(back_reinforcement_outer)
+    .extrude(reinforcement_height + screw_head_h + shell_t)
+    .faces(">Y")
+    .workplane(centerOption="CenterOfBoundBox")
+    .placeSketch(back_reinforcement_cutout)
+    .cutBlind(-reinforcement_height)
+    .faces("<Y")
+    .workplane(centerOption="CenterOfBoundBox")
+    .placeSketch(screw_holes)
+    .cutBlind(-1000)
+    .faces("<Y")
+    .workplane(centerOption="CenterOfBoundBox")
+    .placeSketch(screw_countersinks)
+    .cutBlind(-screw_head_h)
+)
+
+exporters.export(rear_mount, "rear_mount.stl")