chiark / gitweb /
sewing-table: wip new machine profile
authorIan Jackson <ijackson@chiark.greenend.org.uk>
Wed, 24 May 2017 22:50:48 +0000 (23:50 +0100)
committerIan Jackson <ijackson@chiark.greenend.org.uk>
Wed, 24 May 2017 22:50:48 +0000 (23:50 +0100)
sewing-table.scad.m4

index 8e59b4a..472aacf 100644 (file)
@@ -30,12 +30,43 @@ demo_slop = 0.1;
 
 // cutout
 
+machine_rear_to_front = 85;
+
+machine_rear_profile = [
+                       [ -  0,  -0.00 ],
+                       [ -  2,  -0.10 ],
+                       [ -  4,  -0.25 ],
+                       [ -  6,  -0.50 ],
+                       [ -  8,  -0.75 ],
+                       [ - 10,  -1.50 ],
+                       [ - 12,  -2.25 ],
+                       [ - 14,  -3.25 ],
+                       [ - 16,  -4.25 ],
+                       [ - 18,  -5.75 ],
+                       [ - 20,  -8.00 ]
+                       ];
+
+machine_front_profile =  [
+                         [  128,  -3.70,  ],
+                         [  124,  -2.80,  ],
+                         [  120,  -2.50,  ],
+                         [  116,  -2.00,  ],
+                         [  112,  -1.80,  ],
+                         [  108,  -1.60,  ],
+                         [  104,  -1.30,  ],
+                         [  100,  -1.00,  ],
+                         [   96,  -0.80,  ],
+                         [   92,  -0.70,  ],
+                         [   88,  -0.50,  ],
+                         [   84,  -0.50,  ]
+                         ];
+
 cutout_l_end_y_front_slop = 0.5;
 cutout_l_end_y_rear_slop = 0.5;
 cutout_l_end_x_slop = 0.25;
 
 cutout_l_end_x = 22;
-cutout_l_end_y = 85;
+cutout_l_end_y = machine_rear_to_front;
 cutout_l_end_curve = 1;
 cutout_l_end_y_total = cutout_l_end_y
   + cutout_l_end_y_front_slop + cutout_l_end_y_rear_slop;
@@ -352,6 +383,21 @@ module Machine_Arm(){
   }
 }
 
+module Machine_Profile(){
+  first_rear = machine_rear_profile[0];
+  first_front = machine_front_profile[len(machine_front_profile)-1];
+  below_point = 0.5 * ( first_rear + first_front ) + [ 0, -40 ];
+  pol = concat( machine_rear_profile,
+               [ below_point ],
+               machine_front_profile);
+  skew_angle = atan2( first_front[1] - first_rear[1],
+                     first_front[0] - first_rear[0] );
+  echo(below_point, pol, skew_angle);
+  rotate([0,0, -skew_angle ]){
+    polygon(pol);
+  }
+}
+
 module Machine_Rear(){ ////toplevel
   big_rad = rearcurve_total_len - rearcurve_strt_len + rearcurve_rad;
   small_rad = rearcurve_rad + rearcurve_rad_slop;
@@ -565,3 +611,5 @@ module Demo(){ ////toplevel
 //TestPiece1();
 //TestPiece2();
 //Demo();
+
+Machine_Profile();