merged

monitor/hinge.py

@@ -10,33 +10,31 @@ screw_head_h = 2.5
 screw_head_radius = 3.5
 screw_radius = 1.5
 
-hinge_s = 7.5
-hinge_t = 5
+hinge_w = 7.5
+hinge_h = 15
+hinge_t = ti_depth - 1
 hinge_gap = screw_shaft - 2 * hinge_t
-
+# The side of the screw head
 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))
+    .segment((0, 0), (0, hinge_h))
+    .arc((0, hinge_h), (hinge_w / 2, hinge_h + hinge_w / 2), (hinge_w, hinge_h))
+    .segment((hinge_w, 0))
     .close()
-    .arc((hinge_s / 2, hinge_s), screw_radius, 0, 360)
+    .arc((hinge_w / 2, hinge_h), 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))
+    .segment((0, 0), (0, hinge_h))
+    .arc((0, hinge_h), (hinge_w / 2, hinge_h + hinge_w / 2), (hinge_w, hinge_h))
+    .segment((hinge_w, 0))
     .close()
-    .arc((hinge_s / 2, hinge_s), ti_radius, 0, 360)
+    .arc((hinge_w / 2, hinge_h), ti_radius, 0, 360)
     .assemble()
 )
 
-# TODO countersink
-# TODO proper threaded insert depth sizing
-
 hinge = (
     cq.Workplane("bottom")
     .placeSketch(hinge_profile_1)
@@ -46,4 +44,4 @@ hinge = (
     .extrude(hinge_t)
 )
 
-exporters.export(hinge, "hinge.stl")
+# exporters.export(hinge, "hinge.stl")

monitor/lower_arm.py

@@ -0,0 +1,49 @@
+# This is the arm from the tripod to the "elbow"
+
+import cadquery2 as cq
+from cadquery2 import exporters
+
+from hinge import hinge_gap, hinge_w
+
+# monitor hinge dimensions
+inner_monitor_hinge = 3.2 / 2
+outer_monitor_hinge = hinge_w / 2
+
+# tripod hinge dimensions
+inner_tripod_hinge = 7.5 / 2
+outer_tripod_hinge = 17.5 / 2
+tripod_hinge_width = 5.5
+
+
+monitor_hinge_shape = (
+    cq.Sketch().circle(outer_monitor_hinge).circle(inner_monitor_hinge, mode="s")
+)
+
+tripod_hinge_shape = (
+    cq.Sketch().circle(outer_tripod_hinge).circle(inner_tripod_hinge, mode="s")
+)
+
+arm_width = min(tripod_hinge_width, hinge_gap)
+arm_length = 150
+
+lower_arm = (
+    cq.Workplane("XY")
+    .rect(arm_width, arm_width)
+    .extrude(arm_length)
+    .edges("|Z or <Z or >Z")
+    .fillet(0.25)
+    .faces(">Y")
+    # Add hinge that connects to the monitor
+    .workplane(centerOption="CenterOfBoundBox", offset=(hinge_gap - arm_width) / 2)
+    .center(0, arm_length / 2 + (outer_monitor_hinge - inner_monitor_hinge))
+    .placeSketch(monitor_hinge_shape)
+    .extrude(-hinge_gap)
+    .center(0, -(arm_length + outer_tripod_hinge))
+    # Undo previous offset + new offset
+    .workplane(offset=-(hinge_gap - arm_width - tripod_hinge_width + arm_width) / 2)
+    # Add hinge that connects to the tripod
+    .placeSketch(tripod_hinge_shape)
+    .extrude(-tripod_hinge_width)
+)
+
+exporters.export(lower_arm, "lower_arm.stl")

monitor/rear_mount.py

@@ -10,9 +10,13 @@ screw_head_h = 2.5
 screw_head_radius = 3.5
 screw_radius = 1.5
 
+from hinge import hinge_profile_1, hinge_profile_2, hinge_t, hinge_gap, hinge_w
 
 reinforcement_height = 1 + 1 + ti_depth - shell_t
 
+rear_mount_thickness = reinforcement_height + screw_head_h + shell_t
+rear_mount_width = width / 2 + 2 * shell_t
+
 back_reinforcement_cutout = (
     cq.Sketch()
     .trapezoid(width / 2 + 1, 15 + 1, 90, mode="a")
@@ -23,22 +27,25 @@ back_reinforcement_cutout = (
 
 back_reinforcement_outer = (
     cq.Sketch()
-    .trapezoid(width / 2 + 2 * shell_t, 15 + 2 * shell_t, 90, mode="a")
+    .trapezoid(rear_mount_width, 15 + 2 * shell_t, 90, mode="a")
     .reset()
     .vertices()
     .fillet(2)
 )
 
+# FIXME: use counterbore holes function instead
+
 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)
+    .extrude(rear_mount_thickness)
     .faces(">Y")
     .workplane(centerOption="CenterOfBoundBox")
     .placeSketch(back_reinforcement_cutout)
@@ -51,6 +58,18 @@ rear_mount = (
     .workplane(centerOption="CenterOfBoundBox")
     .placeSketch(screw_countersinks)
     .cutBlind(-screw_head_h)
+    # Hinge integration
+    .faces(">X")
+    .workplane(centerOption="CenterOfBoundBox", offset=-(rear_mount_width - 20) / 2)
+    .transformed(rotate=cq.Vector(0, 0, 90))
+    .center(-hinge_w / 2, rear_mount_thickness / 2)
+    .tag("hingeplane")
+    .placeSketch(hinge_profile_1)
+    .extrude(-hinge_t)
+    .workplaneFromTagged("hingeplane")
+    .workplane(offset=-hinge_t - hinge_gap)
+    .placeSketch(hinge_profile_2)
+    .extrude(-hinge_t)
 )
 
 exporters.export(rear_mount, "rear_mount.stl")

monitor/upper_arm.py

@@ -0,0 +1,54 @@
+# This is the arm from the monitor to the "elbow"
+
+import cadquery2 as cq
+from cadquery2 import exporters
+
+from hinge import hinge_gap, hinge_w, hinge_profile_1, hinge_profile_2, hinge_t
+
+# monitor hinge dimensions
+inner_monitor_hinge = 3.2 / 2
+outer_monitor_hinge = hinge_w / 2
+
+monitor_hinge_shape = (
+    cq.Sketch().circle(outer_monitor_hinge).circle(inner_monitor_hinge, mode="s")
+)
+
+# Both hinges are the same shape, just one is outer and the other inner
+elbow_hinge_shape = (
+    cq.Sketch().circle(outer_monitor_hinge).circle(inner_monitor_hinge, mode="s")
+)
+
+arm_length = 150
+arm_width = hinge_gap
+
+upper_arm = (
+    cq.Workplane("XY")
+    .rect(hinge_w, hinge_gap)
+    .extrude(arm_length)
+    .edges("|Z or <Z or >Z")
+    .fillet(0.25)
+    .faces(">Y")
+    # Add hinge that connects to the monitor
+    .workplane(centerOption="CenterOfBoundBox")
+    .center(0, arm_length / 2 + (outer_monitor_hinge - inner_monitor_hinge))
+    .placeSketch(monitor_hinge_shape)
+    .extrude(-hinge_gap)
+    .center(0, -(arm_length + outer_monitor_hinge))
+    # Add hinge that connects to the elbow
+    .transformed(rotate=cq.Vector(0, 0, 180))
+    .workplane(offset=(20 - arm_width) / 2)
+    .center(-hinge_w / 2, 0)
+    .tag("hingeplane")
+    .placeSketch(hinge_profile_1)
+    .extrude(-hinge_t)
+    .workplaneFromTagged("hingeplane")
+    .workplane(offset=-hinge_t - hinge_gap)
+    .placeSketch(hinge_profile_2)
+    .extrude(-hinge_t)
+    .workplaneFromTagged("hingeplane")
+    .center(+hinge_w / 2, 0)
+    .rect(hinge_w, hinge_w + 6)
+    .extrude(-(2 * hinge_t + hinge_gap))
+)
+
+exporters.export(upper_arm, "upper_arm.stl")