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Revised flex case; not yet flexible enough

main
Matthias Neeracher 8 months ago
parent
commit
e169dfb9f5
1 changed files with 89 additions and 94 deletions
  1. +89
    -94
      battery-case-generator.py

+ 89
- 94
battery-case-generator.py View File

@@ -13,11 +13,13 @@ parser.add_argument('--kerf', default=.1, type=float, help='Kerf')
parser.add_argument('--corner-length', default=4, help='Length of stretch corner in material thicknesses')
parser.add_argument('--stretch', default=1.05, type=float, help='Reduction factor of stretch material')
parser.add_argument('--horizontal-finger', default=5.0, type=float, help='Width of horizontal fingers')
parser.add_argument('--vertical-finger', default=5.0, type=float, help='Width of vertical fingers')
parser.add_argument('--vertical-finger', default=15.0, type=float, help='Width of vertical fingers')
parser.add_argument('--padding', default=1.5, type=float, help='Padding around holes')
parser.add_argument('--outside-padding', default=4, type=float, help='Extra padding between holes and wall')
parser.add_argument('--outside-padding', default=4.0, type=float, help='Extra padding between holes and wall')
parser.add_argument('--extra-height', default=2.0, type=float, help='Extra vertical space')
parser.add_argument('--thickness', default=3.0, type=float, help='Thickness of material')
parser.add_argument('--lid', default=0.2, type=float, help='How much extra play to give the lid')
parser.add_argument('--tooth', default=0.8, type=float, help='How much to round the edges of the teeth')
parser.add_argument('--verbose', action='store_true', help='Print computed parameter values')
args = parser.parse_args()
assert (args.dimension % 2) == 1
@@ -54,17 +56,18 @@ args.interior_leg = (args.interior_edge-args.horizontal_finger-args.kerf)/2-arg
finger_length = args.interior_edge-2.0*args.corner_inset
args.n_hor_fingers = max(int(finger_length/args.horizontal_finger/2), 1)
args.exterior_leg = (finger_length-(2*args.n_hor_fingers-1)*args.horizontal_finger+args.kerf)/2
args.exterior_slot = (args.exterior_edge-args.horizontal_finger+args.kerf)/2
args.n_ver_fingers = int(args.height/args.vertical_finger/2)
args.vertical_finger = args.height/args.n_ver_fingers/2
args.slots = [args.vertical_finger*2.5-args.thickness*0.5, args.vertical_finger*4.5-args.thickness*0.5]
args.wall_leg = (args.interior_edge-args.corner-(2*args.n_hor_fingers-1)*args.horizontal_finger+args.kerf)/2
args.exterior_slot = (args.interior_edge-args.horizontal_finger+args.kerf)/2
args.n_ver_fingers = int((args.height+args.extra_height)/args.vertical_finger)
top_slot = args.extra_height+0.5*args.height
args.slots = [top_slot, top_slot+2*args.thickness]

if args.verbose:
print(args, file=sys.stderr)

BOX = 2.0*args.exterior_edge+5.0
DIMX = 3.0*BOX
DIMY = 2.0*BOX+args.height+3.0*args.thickness
DIMY = 2.0*BOX+args.height+args.extra_height+2.0*args.thickness+5.0
PI3 = math.pi/3

HOLES = ''
@@ -171,119 +174,111 @@ def draw_plane(cx, cy, layer):
turtle.circle(args.corner_radius, 60)
HOLES += '<path d="%s"/>\n' % turtle.to_s()

def draw_side(x0, y0, h, slots):
global HOLES, SHAPES
turtle = svgturtle.SvgTurtle(x0, y0+args.thickness)
for finger in range(args.n_hor_fingers):
turtle.forward(args.exterior_leg-args.kerf if finger == 0 else args.horizontal_finger-args.kerf)
turtle.left(90)
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(args.horizontal_finger+args.kerf)
def draw_flex(t, h):
global HOLES
turtle = svgturtle.SvgTurtle(t.x, t.y)
al = h/3.0-args.thickness
bl = (h-args.thickness)/3.0-args.thickness
nx = int(args.corner_length)
dx = args.corner/(2*nx-1)
for stripe in range(nx):
turtle.right(90)
turtle.forward(0.5*al)
turtle.penup()
turtle.forward(args.thickness)
turtle.pendown()
turtle.forward(al)
turtle.penup()
turtle.forward(args.thickness)
turtle.pendown()
turtle.forward(al)
turtle.penup()
turtle.forward(args.thickness)
turtle.pendown()
turtle.forward(0.5*al)
turtle.penup()
turtle.left(90)
turtle.forward(args.exterior_leg-args.kerf-args.thickness)
turtle.right(90)
for finger in range(args.n_ver_fingers):
turtle.forward(args.vertical_finger-(args.kerf/2 if finger==0 else args.kerf))
turtle.forward(dx)
turtle.left(90)
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(args.vertical_finger+args.kerf)
turtle.right(90)
if finger < args.n_ver_fingers-1:
turtle.forward(args.thickness)
turtle.left(90)
turtle.forward(args.exterior_edge-args.thickness)
turtle.right(90)
for finger in range(args.n_ver_fingers):
turtle.forward(args.vertical_finger-(args.kerf/2 if finger==0 else args.kerf))
turtle.left(90)
turtle.pendown()
turtle.forward(bl)
turtle.penup()
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(args.vertical_finger+args.kerf)
turtle.right(90)
if finger < args.n_ver_fingers-1:
turtle.forward(args.thickness)
turtle.left(90)
SHAPES += '<path d="%s"/>\n' % turtle.to_s()
for slot in slots:
x = x0+args.exterior_slot
y = y0+slot
w = args.horizontal_finger-args.kerf
h = args.thickness-args.kerf
HOLES += '<rect x="%.2f" y="%.2f" width="%.2f" height="%.2f"/>\n' % (x, y, w, h)

def draw_case(x0, y0, h, slots):
global HOLES, SHAPES
turtle = svgturtle.SvgTurtle(x0, y0)
turtle.forward(args.exterior_edge*0.5)
for side in range(6):
turtle.right(90)
turtle.forward(args.height-args.thickness)
turtle.pendown()
turtle.forward(bl)
turtle.penup()
turtle.back(args.height-args.thickness)
turtle.left(90)
turtle.forward(2*args.thickness)
turtle.right(90)
turtle.forward(args.thickness)
turtle.pendown()
turtle.forward(args.height-args.thickness)
turtle.forward(bl)
turtle.penup()
turtle.back(args.height-args.thickness)
turtle.left(90)
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(dx)
turtle.pendown()
if side==5:
break
turtle.forward(args.exterior_edge-args.thickness*2)
turtle.forward(args.exterior_edge*0.5-args.thickness*2)
turtle.right(90)
for finger in range(args.n_ver_fingers):
turtle.forward(args.vertical_finger-(args.kerf/2 if finger==0 else args.kerf))
HOLES += '<path d="%s"/>\n' % turtle.to_s()

def draw_case_h(turtle, h, top):
turtle.forward(0.5*args.interior_edge-0.5*args.corner)
for side in range(6):
turtle.left(90)
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(args.vertical_finger+args.kerf)
if top:
draw_flex(turtle, h+2*args.thickness)
turtle.forward(args.corner)
turtle.right(90)
if finger < args.n_ver_fingers-1:
turtle.forward(args.thickness)
turtle.left(90)
turtle.forward(args.exterior_edge*0.5)
for side in range(6):
turtle.right(90)
turtle.forward(args.height-args.thickness)
turtle.penup()
turtle.back(args.height-args.thickness)
turtle.forward(args.thickness)
turtle.left(90)
turtle.pendown()
if side==5:
if side == 5:
break
turtle.forward(args.wall_leg-0.5*args.kerf)
for finger in range(args.n_hor_fingers):
turtle.forward(args.exterior_leg if finger == 0 else args.horizontal_finger+args.kerf)
if finger > 0:
turtle.forward(args.horizontal_finger-args.kerf)
turtle.left(90)
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(args.horizontal_finger-args.kerf)
turtle.forward(args.horizontal_finger+args.kerf)
turtle.right(90)
turtle.forward(args.thickness)
turtle.left(90)
turtle.forward(args.exterior_leg)
turtle.forward(args.exterior_edge*0.5)
turtle.right(90)
turtle.forward(args.wall_leg-0.5*args.kerf)
turtle.forward(0.5*args.interior_edge-0.5*args.corner)

def draw_case_v(turtle, h):
ey = turtle.y+h
leg = (h-(args.n_ver_fingers-0.66)*args.vertical_finger)/2.0
slope = args.vertical_finger/math.sqrt(18)
turtle.forward(leg)
for finger in range(args.n_ver_fingers):
turtle.forward(args.vertical_finger-(args.kerf/2 if finger==0 else args.kerf))
turtle.left(90)
turtle.forward(args.thickness)
turtle.right(90)
turtle.forward(args.vertical_finger+args.kerf)
turtle.right(90)
if finger < args.n_ver_fingers-1:
turtle.forward(args.thickness)
turtle.left(90)
ty = ey if finger==args.n_ver_fingers-1 else turtle.y+args.vertical_finger
turtle.circle(args.tooth, 135)
turtle.forward(slope)
turtle.circle(-args.tooth, 135)
turtle.forward(0.66*args.vertical_finger)
turtle.circle(-args.tooth, 135)
turtle.forward(slope)
turtle.circle(args.tooth, 135)
turtle.forward(ty-turtle.y)

def draw_case(x0, y0, h, slots):
global HOLES, SHAPES
turtle = svgturtle.SvgTurtle(x0, y0+args.thickness)
draw_case_h(turtle, h, True)
turtle.right(90)
draw_case_v(turtle, h)
turtle.right(90)
draw_case_h(turtle, h, False)
turtle.penup()
turtle.left(90)
turtle.back(h)
turtle.pendown()
draw_case_v(turtle, h)
SHAPES += '<path d="%s"/>\n' % turtle.to_s()
for slot in slots:
for side in range(5):
x = x0+(side+0.5)*args.exterior_edge+args.thickness+args.exterior_slot
x = x0+(side+.5)*args.interior_edge+args.exterior_slot
y = y0+slot
w = args.horizontal_finger-args.kerf
h = args.thickness-args.kerf
@@ -299,6 +294,6 @@ draw_plane(1.5*BOX, 1.5*BOX, 'rim')
draw_plane(1.5*BOX, 1.5*BOX, 'plug')
draw_plane(2.5*BOX, 1.5*BOX, 'lid')
draw_plane(2.5*BOX, 1.5*BOX, 'plug_mark')
draw_case(0.05*args.grid*args.dimension, 2.0*BOX, args.height, args.slots)
draw_case(0.05*args.grid*args.dimension, 2.0*BOX, args.height+args.extra_height, args.slots)
print('<g fill="none" stroke="red">', HOLES, '</g>', '<g fill="none" stroke="blue">', MARKS, '</g>', '<g fill="none" stroke="black">', SHAPES, '</g>', sep='\n')
print('</svg>')

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