started working on figuring out cuts for dispenser gears

prototype/circles.py

@@ -5,10 +5,11 @@ import operator
 
 
 def svg_circle(id, name, c, r):
+    # create circle object in svg notation
     text = ['      <circle\n',
             '       id="circle{}"\n'.format(id),
             '       inkscape:label="{}"\n'.format(name),
-            '       style="fill:none;stroke:#000000;stroke-width:1.0"\n',
+            '       style="fill:none;stroke:#000000;stroke-width:1.0mm"\n',
             '       r="{}mm"\n'.format(r),
             '       cy="{}mm"\n'.format(c[1]),
             '       cx="{}mm" />\n'.format(c[0])]
@@ -174,10 +175,10 @@ class PlateLayout:
         self.target_plate_radius = 155.0
         self.target_radius_1 = 50.0
         self.target_radius_2 = 20.0
-        teeth = 360
+        teeth = 200
 
         D = 2 * self.target_plate_radius
-        m = D/teeth/math.pi
+        m = D/teeth
 
         print("plate radius        = {:6.2f} mm".format(self.target_plate_radius))
         print("big circle radius   = {:6.2f} mm".format(self.target_radius_1))
@@ -187,6 +188,29 @@ class PlateLayout:
         print("pitch diameter:  D = {} mm".format(D))
         print("module:          M = {} mm".format(m))
 
+
+        # parameters for dispenser gears
+        self.dispenser_module = 1.5
+        dispenser_1_target_pitch_diameter_big = 80.0
+        dispenser_1_target_pitch_diameter_small = 25.0
+        dispenser_1_teeth_big = int(dispenser_1_target_pitch_diameter_big/self.dispenser_module)
+        dispenser_1_teeth_small = int(dispenser_1_target_pitch_diameter_small/ self.dispenser_module)
+
+        dispenser_1_pitch_diameter_big = self.dispenser_module * dispenser_1_teeth_big
+        dispenser_1_outer_diameter_big = dispenser_1_pitch_diameter_big + 2 * self.dispenser_module
+        dispenser_1_pitch_diameter_small = self.dispenser_module * dispenser_1_teeth_small
+        dispenser_1_outer_diameter_small = dispenser_1_pitch_diameter_small + 2 * self.dispenser_module
+
+        dispenser_2_target_pitch_diameter_big = 40.0
+        dispenser_2_target_pitch_diameter_small = 25.0
+        dispenser_2_teeth_big = int(dispenser_2_target_pitch_diameter_big / self.dispenser_module)
+        dispenser_2_teeth_small = int(dispenser_2_target_pitch_diameter_small / self.dispenser_module)
+
+        dispenser_2_pitch_diameter_big = self.dispenser_module * dispenser_2_teeth_big
+        dispenser_2_outer_diameter_big = dispenser_2_pitch_diameter_big + 2 * self.dispenser_module
+        dispenser_2_pitch_diameter_small = self.dispenser_module * dispenser_2_teeth_small
+        dispenser_2_outer_diameter_small = dispenser_2_pitch_diameter_small + 2 * self.dispenser_module
+
         # plot plate
         plt.figure(2)
         plt.plot(0.0, 0.0, 'o')
@@ -220,6 +244,13 @@ class PlateLayout:
             circle = plt.Circle((x,y), self.target_radius_1, fill=False)
             plt.gca().add_artist(circle)
 
+        p1 = dispenser_1_pitch_diameter_big
+        p2 = dispenser_1_pitch_diameter_small
+        a1 = self.dispenser_module
+        a2 = self.dispenser_module
+        offset_1 = sqrt((p1 / 2 + p2 / 2) ** 2 - (p1 / 2 + a1) ** 2) - p2 / 2 - a2
+        print("dispenser 1 offset = {}".format(offset_1))
+
         print(" big circle tangent points: ")
         for k in range(0, self.N):
             x = coords[k][0] * outer_radius
@@ -255,6 +286,13 @@ class PlateLayout:
             circle = plt.Circle((x, y), self.target_radius_2, fill=False)
             plt.gca().add_artist(circle)
 
+        p1 = dispenser_2_pitch_diameter_big
+        p2 = dispenser_2_pitch_diameter_small
+        a1 = self.dispenser_module
+        a2 = self.dispenser_module
+        offset_2 = sqrt((p1 / 2 + p2 / 2) ** 2 - (p1 / 2 + a1) ** 2) - p2 / 2 - a2
+        print("dispenser 2 offset = {}".format(offset_2))
+
         print(" small circle tangent points: ")
         for k in range(0, self.N):
             x = coords_2[k][0] * outer_radius
@@ -272,62 +310,8 @@ class PlateLayout:
             plt.plot(t1[0], t1[1], 'o')
             plt.plot(t2[0], t2[1], 'o')
 
-        # for k in range(0, self.N):
+    pass
-        #
+
-        #     t1, t2 = compute_tangent_points((0,0),(x,y), target_radius_1)
-        #     self.tube_1_tangents[k] = (t1, t2)
-        #
-        #     plt.plot(t1[0] / 1000, t1[1] / 1000, 'o')
-        #     plt.plot(t2[0] / 1000, t2[1] / 1000, 'o')
-        #
-        #     angle = arctan2(y,x) * 360.0 / (2.0 * math.pi)
-        #     dist = (x**2 + y**2)**0.5
-        #
-        #     angle_t1 = arctan2(t1[1], t1[0]) * 360.0 / (2.0 * math.pi)
-        #     dist_t1 = (t1[0] ** 2 + t1[1] ** 2) ** 0.5
-        #
-        #     angle_t2 = arctan2(t2[1], t2[0]) * 360.0 / (2.0 * math.pi)
-        #     dist_t2 = (t2[0] ** 2 + t2[1] ** 2) ** 0.5
-        #     print("   k = {},  (x,y) = ({:8.3f}, {:8.3f}),  angle = {:8.3f} deg,  dist = {:8.3f} mm".format(k, x, y, angle, dist))
-        #     print("              t1 = ({:8.3f}, {:8.3f}),  angle = {:8.3f} deg,  dist = {:8.3f} mm".format(t1[0], t1[1], angle_t1,
-        #                                                                                                  dist_t1))
-        #     print("              t2 = ({:8.3f}, {:8.3f}),  angle = {:8.3f} deg,  dist = {:8.3f} mm".format(t2[0], t2[1], angle_t2,
-        #                                                                                                  dist_t2))
-        # print("\n")
-        # tube1['coords'] = tube_1_coords
-        # tube1['tangents'] = tube_1_tangents
-        #
-        # tube_2_coords = {}
-        # tube_2_tangents = {}
-        # print("  coordinates:")
-        # for k in range(0,self.N):
-        #     x = coords_2[k][0] * 1000
-        #     y = coords_2[k][1] * 1000
-        #
-        #     tube_2_coords[k] = (x, y)
-        #
-        #     t1, t2 = compute_tangent_points((0, 0), (x, y), r * 100)
-        #     tube_2_tangents[k] = (t1, t2)
-        #     plt.plot(t1[0] / 1000, t1[1] / 1000, 'o')
-        #     plt.plot(t2[0] / 1000, t2[1] / 1000, 'o')
-        #
-        #     angle = arctan2(y, x) * 360.0 / (2.0 * math.pi)
-        #     dist = (x ** 2 + y ** 2) ** 0.5
-        #
-        #     angle_t1 = arctan2(t1[1], t1[0]) * 360.0 / (2.0 * math.pi)
-        #     dist_t1 = (t1[0] ** 2 + t1[1] ** 2) ** 0.5
-        #
-        #     angle_t2 = arctan2(t2[1], t2[0]) * 360.0 / (2.0 * math.pi)
-        #     dist_t2 = (t2[0] ** 2 + t2[1] ** 2) ** 0.5
-        #     print("   k = {},  (x,y) = ({:8.3f}, {:8.3f}),  angle = {:8.3f} deg,  dist = {:8.3f} mm".format(k, x, y, angle, dist))
-        #     print("              t1 = ({:8.3f}, {:8.3f}),  angle = {:8.3f} deg,  dist = {:8.3f} mm".format(t1[0], t1[1], angle_t1,
-        #                                                                                                  dist_t1))
-        #     print("              t2 = ({:8.3f}, {:8.3f}),  angle = {:8.3f} deg,  dist = {:8.3f} mm".format(t2[0], t2[1], angle_t2,
-        #                                                                                                  dist_t2))
-        # tube2['coords'] = tube_2_coords
-        # tube2['tangents'] = tube_2_tangents
-        #
-        # return tube1, tube2
 
     """
     input: file = svg with plate gear centered at (0,0)
@@ -358,6 +342,7 @@ class PlateLayout:
 
         f_lines.append('</svg>\n')
 
+        # write new svg image
         fw = open('output.svg', 'w')
         fw.writelines(f_lines)
         fw.close()