add coil to hex spiral

script/2018.12.8-hex-speaker-spiral.py

@@ -127,8 +127,9 @@ def main():
 	frame_bolt_d = 4.1 #mm, diameter of bolt holes
 
 	wire_pitch = 2*.088 #mm, pitch, .088 = measured diameter (.080) + .008 mm slop (10% applied)
-	N = 11 #number of turns
+	N = 19 #number of turns, must be odd
 	Nr = 4 #number of radial layers in the hex lattice
+	lead_length = 20
 
 	#make frame
 	frame = []
@@ -142,21 +143,52 @@ def main():
 			circle(.5*(v0+v1), frame_bolt_d, 'frame'),
 			]
 
-	#make magnet grid and air hole grid
-	magnets = [];
-	magnets += [circle(V2(0,0),mag_d,'magnets_a')]
+	#for each of the (2*Nr-1)*(Nr) points in the grid, what are the starting and ending angles
+	coil_params=[
+		[(90,330), 		(150,30),		(210,360+90),	(270,360+30),	(210,90),	(270,30),		(210,360+90), (150,270)],
+		[(90,330), 		(270,360+150),	(330,450),		(270,150),		(330,90),	(270,360+150),	(330,360+90), (150,270)],
+		[(210,330),		(360+150,270), 	(330,450),		(270,150),		(330,90),	(270,360+150),	(330,360+90), (150,270)],
+		[(360+210,330),	(150,360+30),	(360+210,330),	(270,150),		(330,90),	(270,360+150),	(330,360+90), (150,270)],
+		]
+
+	#make magnet grid, air holes, and coils
+	crvs = [];
+	crvs += [circle(V2(0,0),mag_d,'magnets_a')]
 	for i in range(3): #3-fold angular symmetry
 		vr = V2(cos(i*2*pi/3),sin(i*2*pi/3))
 		vth = V2(cos(i*2*pi/3+pi/2),sin(i*2*pi/3+pi/2))
 		vk = V2(cos((i+1)*2*pi/3),sin((i+1)*2*pi/3))
 		for j in range(Nr):
 			for k in range(Nr+1):
-				magnets += [circle(2*s32*vr*(j+1) + 2*s32*vk*k, mag_d, 'magnets_a')]
+				crvs += [circle(2*s32*vr*(j+1) + 2*s32*vk*k, mag_d, 'magnets_a')]
 				if k<Nr:
-					magnets += [
+					crvs += [
 						circle(2*s32*vr*(j+.5) + 2*s32*vk*k + .5*s*vth, mag_d, 'magnets_b'),
 						circle(2*s32*vr*j + 2*s32*vk*k + s*vth, hole_d, 'holes'),
 					]
 				
+					#coils
+					for l in range(N):
+						dd = (l - (N-1)/2)*wire_pitch
+						crvs += [ arc(2*s32*vr*(j+.5) + 2*s32*vk*k + .5*s*vth, s+dd, coil_params[k][2*j][0]+i*120, coil_params[k][2*j][1]+i*120,'coils' ) ]				
+						if j<Nr-1 or k>0:
+							crvs += [ arc(2*s32*vr*(j+1) + 2*s32*vk*k, s+dd, coil_params[k][2*j+1][0]+i*120, coil_params[k][2*j+1][1]+i*120,'coils' ) ]
+
+		#make traverses
+		for l in range(N):
+			dd = (l - (N-1)/2)*wire_pitch
+			crvs += [ arc(2*s32*(vr+vk)*Nr, s+dd, 270+i*120, 180+i*120,'coils' ) ]
+			crvs += [ arc(2*s32*vr*(Nr-1) + 2*s32*Nr*vk, s+dd, 270+i*120, 360+i*120,'coils' ) ]
+			if l<N-1:
+				crvs += [ arc(2*s32*vr*(Nr-.5) + 2*s32*Nr*vk - .25*wire_pitch*vr, s*(sqrt(3)-1)+dd+.5*wire_pitch, 180+i*120, 0+i*120,'coils' ) ]
+		#make leads
+		v0 = 2*s32*vr*(Nr-.5) + 2*s32*Nr*vk - .25*wire_pitch*vr
+		r0 = .5*(s*(sqrt(3)-1) - N/2.*wire_pitch)*vr
+		r1 = .5*(s*(sqrt(3)-1) + N/2.*wire_pitch)*vr
+		crvs += [
+			line( v0-r0, v0-r0+lead_length*vth, 'coils' ),
+			line( v0+r1, v0+r1+lead_length*vth, 'coils' ),
+		]
+
 if __name__ == '__main__':
 	main()
\ No newline at end of file