Inscread plate strap size

Also fix mass printing on all objects

Signed-off-by: Arnaud Morin <arnaud.gfpv@mailops.fr>

arm.py

@@ -147,7 +147,5 @@ if "show_object" not in globals():           # running outside CQ-editor
 show_object(result)
 
 if __name__ == "__main__":
-    vol = result.val().Volume()
-    m = vol * CF_DENSITY
-    print(f"arm  mass {m:.2f} g each, {4*m:.2f} g for four")
-
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("arm", v * CF_DENSITY))

camera_mount.py

@@ -4,6 +4,7 @@
 
 import cadquery as cq
 from math import sqrt
+from frame_params import TPU_DENSITY
 
 def camera_mount():
 
@@ -130,9 +131,5 @@ if "show_object" not in globals():          # running outside CQ-editor
 show_object(result)
 
 if __name__ == "__main__":
-    TPU_DENSITY = 1.21e-3   # g/mm3
-
-    solid = result.val()
-
-    print("camera_mount %.2f g in TPU"
-          % (solid.Volume() * TPU_DENSITY))
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("camera mount", v * TPU_DENSITY))

fc.py

@@ -3,13 +3,7 @@
 #
 
 import cadquery as cq
-
-# A flight controller is not a material, it is a stack: two boards, their
-# spacers, and everything soldered to them.  This models only the envelope, as
-# one solid, so the density is FR4's -- bare PCB -- and the dense parts (FETs,
-# inductors, connectors) stand in for the air between the boards.  It lands the
-# block at about 12 g, which is what a real 25.5 mm FC plus 4-in-1 ESC weighs.
-PCB_DENSITY = 1.85e-3    # g/mm3, FR4
+from frame_params import PCB_DENSITY
 
 
 def fc():
@@ -76,8 +70,6 @@ if "show_object" not in globals():          # running outside CQ-editor
 
 show_object(result)
 
-
 if __name__ == "__main__":
-
-    print("fc   %.2f g" % (result.val().Volume() * PCB_DENSITY))
-
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("fc", v * PCB_DENSITY))

frame_params.py

@@ -7,7 +7,10 @@ from math import cos, radians, sin, sqrt
 # --- material ---------------------------------------------------------------
 
 THICKNESS = 2.0
-CF_DENSITY = 1.55e-3     # g/mm3, for mass reporting
+CF_DENSITY = 1.55e-3     # g/mm3
+TPU_DENSITY = 1.21e-3    # g/mm3
+PCB_DENSITY = 1.85e-3    # g/mm3
+ALU_DENSITY = 2.70e-3    # g/mm3, for mass reporting
 
 # --- joint fit --------------------------------------------------------------
 

lollipop.py

@@ -3,6 +3,7 @@
 #
 
 import cadquery as cq
+from frame_params import TPU_DENSITY
 
 
 def lollipop():
@@ -126,6 +127,5 @@ show_object(result)
 
 
 if __name__ == "__main__":
-    TPU_DENSITY = 1.21e-3   # g/mm3
-
-    print("lollipop   %.2f g in TPU" % (result.val().Volume() * TPU_DENSITY))
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("lollipop", v * TPU_DENSITY))

motor_base.py

@@ -114,11 +114,6 @@ if "show_object" not in globals():          # running outside CQ-editor
 
 show_object(result)
 
-# Mass report
-def report():
-    vol = result.val().Volume()
-    print(f" Mass    = {vol * CF_DENSITY:5.2f} g")
-    print(f" Mass x4 = {4 * vol * CF_DENSITY:5.2f} g")
-
 if __name__ == "__main__":
-    report()
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("motor base", v * CF_DENSITY))

plate.py

@@ -106,33 +106,37 @@ def plate():
         p = p.cut(bones.rotate((0, 0, 0), (0, 0, 1), a).translate((x, y, 0)))
 
     # Triangle cuts to reduce weight
+    # the small one near center
     cut1 = (
         cq.Workplane("XY")
         .polyline([
-            (6.5, -9),
-            (6.5, 9),
-            (1, 0),
+            (7, -7),
+            (7, 7),
+            (1.5, 0),
         ]).close()
         .extrude(THICKNESS)
         .edges("|Z")
         .fillet(1.0)
     )
+    # strap holes
     cut2 = (
         cq.Workplane("XY")
         .polyline([
-            (9.5, -9),
-            (9.5, 9),
-            (15, 0),
+            (11, -8),
+            (11, 8),
+            (13, 8),
+            (13, -8),
         ]).close()
         .extrude(THICKNESS)
         .edges("|Z")
-        .fillet(1.0)
+        .fillet(0.99)
     )
+    # the big one
     cut3 = (
         cq.Workplane("XY")
         .polyline([
-            (11, 15),
-            (-11, 15),
+            (10, 15),
+            (-10, 15),
             (0, 4),
         ]).close()
         .extrude(THICKNESS)
@@ -168,6 +172,5 @@ show_object(result)
 
 
 if __name__ == "__main__":
-
     v = result.val().Volume()
-    print("plate      mass %.2f g each, %.2f g for two" % (v * CF_DENSITY, 2 * v * CF_DENSITY))
+    print("%-12s %.2f g" % ("plate", v * CF_DENSITY))

spar.py

@@ -111,12 +111,6 @@ result = spar()
 
 assert result.solids().size() == 1, "spar is not one solid"
 
-# Mass report
-def report():
-    vol = result.val().Volume()
-    print(f" Mass    = {vol * CF_DENSITY:5.2f} g")
-    print(f" Mass x4 = {4 * vol * CF_DENSITY:5.2f} g")
-
 # Running outside CQ-editor
 if "show_object" not in globals():
     def show_object(*args, **kwargs):
@@ -125,4 +119,5 @@ if "show_object" not in globals():
 show_object(result)
 
 if __name__ == "__main__":
-    report()
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("spar", v * CF_DENSITY))

standoff.py

@@ -4,12 +4,9 @@
 
 import cadquery as cq
 
-from frame_params import PLATE_GAP
+from frame_params import (ALU_DENSITY, PLATE_GAP)
 
 OD = 3.5                 # round M2 standoff
-ALU_DENSITY = 2.70e-3    # g/mm3, for mass reporting
-PLATE_GAP=16
-
 
 def standoff():
     p = (cq.Workplane("XY")
@@ -39,8 +36,5 @@ show_object(result)
 
 
 if __name__ == "__main__":
-    solid = result.val()
-
-    print("standoff   %.3f g each, %.3f g for four"
-          % (solid.Volume() * ALU_DENSITY,
-             4 * solid.Volume() * ALU_DENSITY))
+    v = result.val().Volume()
+    print("%-12s %.2f g" % ("standoff", v * ALU_DENSITY))