290 lines
6.2 KiB
Plaintext
290 lines
6.2 KiB
Plaintext
# IMU Pointer Enclosure
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import FreeCAD as App
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import FreeCADGui as Gui
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import Part
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from FreeCAD import Base
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doc = App.newDocument("pointer")
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# Global dimensions
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L = 115.0
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W = 36.0
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H = 20.0
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WALL = 3.5
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CR = 3.0
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TOL = 0.25
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# Rail and lid
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RAIL_H = 4.5
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RAIL_D = 2.0
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LIP_H = 2.0
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LIP_OVER = 1.5
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LIP_EMBED = 0.2
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LID_H = RAIL_H - LIP_H - TOL - 0.55
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# Board dimensions
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PCB_T = 1.0
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BRD_L = 21.0
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BRD_W = 17.5
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BRD_X = WALL
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BRD_Y = (W - BRD_W) / 2
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PLATFORM_H = 0.5
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BRD_Z = WALL + PLATFORM_H
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# Clip arms
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ARM_LEN = 5.0
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ARM_THICK = 1.6
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ARM_H = BRD_Z + PCB_T + 0.8
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CLIP_TOL = 0.35
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# USB-C cutout
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USBC_W = 11.0
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USBC_H = 7.0
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USBC_Z = 4.5
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# Battery section
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BAT_L = 50.0
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BAT_W = 12.0
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BAT_H = 12.0
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BAT_X = BRD_X + BRD_L + 8.0
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BAT_Y = (W - BAT_W) / 2
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BAT_CLIP_Y = 8.0
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# Circular notch
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NOTCH_R = (USBC_W + TOL) / 2
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NOTCH_DEPTH = WALL + 2.0
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# Circular notch helper
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def circular_notch(face_x, cy, cz, r, depth):
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circle = Part.makeCircle(r, Base.Vector(face_x, cy, cz), Base.Vector(1, 0, 0))
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face = Part.Face(Part.Wire(circle))
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return face.extrude(Base.Vector(-depth, 0, 0))
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# Rounded box helper
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def rbox(lx, ly, lz, ox=0, oy=0, oz=0, r=CR):
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b = Part.makeBox(lx, ly, lz, Base.Vector(ox, oy, oz))
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try:
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vert = [e for e in b.Edges
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if abs(e.Vertexes[0].Z - e.Vertexes[1].Z) > lz * 0.9]
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if vert:
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b = b.makeFillet(r, vert)
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except Exception:
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pass
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return b
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# Simple box helper
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def box(lx, ly, lz, ox=0, oy=0, oz=0):
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return Part.makeBox(lx, ly, lz, Base.Vector(ox, oy, oz))
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# Rounded slot helper
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def rounded_slot(depth, w, h, ox, oy, oz, r=None):
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if r is None:
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r = h / 2.0
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r = min(r, h / 2.0, w / 2.0)
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import math
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cy = oy + w / 2.0
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cz = oz + h / 2.0
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hw = w / 2.0 - r
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def pt(cx, cy_v, cz_v, angle_deg, radius):
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a = math.radians(angle_deg)
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return Base.Vector(
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cx,
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cy_v + radius * math.cos(a),
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cz_v + radius * math.sin(a)
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)
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l_start = pt(ox, cy - hw, cz, 270, r)
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l_mid = pt(ox, cy - hw, cz, 180, r)
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l_end = pt(ox, cy - hw, cz, 90, r)
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arc_left = Part.Arc(l_start, l_mid, l_end).toShape()
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line_top = Part.makeLine(
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l_end,
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pt(ox, cy + hw, cz, 90, r)
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)
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r_start = pt(ox, cy + hw, cz, 90, r)
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r_mid = pt(ox, cy + hw, cz, 0, r)
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r_end = pt(ox, cy + hw, cz, 270, r)
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arc_right = Part.Arc(r_start, r_mid, r_end).toShape()
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line_bot = Part.makeLine(r_end, l_start)
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wire = Part.Wire([arc_left, line_top, arc_right, line_bot])
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face = Part.Face(wire)
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return face.extrude(Base.Vector(depth, 0, 0))
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# Board clip helper
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def make_clip(corner_x, corner_y, inward_x, inward_y):
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plat_w = ARM_THICK + CLIP_TOL
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plat_x = corner_x if inward_x > 0 else corner_x - plat_w
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plat_y = corner_y if inward_y > 0 else corner_y - plat_w
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platform = box(
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plat_w, plat_w,
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PLATFORM_H + PCB_T,
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plat_x, plat_y, WALL
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)
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ax_ox = corner_x if inward_x > 0 else corner_x - ARM_LEN
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ax_oy = corner_y - ARM_THICK - CLIP_TOL if inward_y > 0 else corner_y + CLIP_TOL
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arm_x = box(ARM_LEN, ARM_THICK, ARM_H, ax_ox, ax_oy, WALL)
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ay_oy = corner_y if inward_y > 0 else corner_y - ARM_LEN
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ay_ox = corner_x - ARM_THICK - CLIP_TOL if inward_x > 0 else corner_x + CLIP_TOL
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arm_y = box(ARM_THICK, ARM_LEN, ARM_H, ay_ox, ay_oy, WALL)
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corner_block_w = ARM_THICK + CLIP_TOL
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cb_ox = corner_x - corner_block_w if inward_x > 0 else corner_x
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cb_oy = corner_y - corner_block_w if inward_y > 0 else corner_y
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corner_block = box(
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corner_block_w, corner_block_w, ARM_H,
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cb_ox, cb_oy, WALL
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)
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return platform.fuse(arm_x.fuse(arm_y).fuse(corner_block))
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# Base outer body
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base = rbox(L, W, H)
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# Inner cavity
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base = base.cut(
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box(L - WALL * 2, W - WALL * 2, H - WALL,
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WALL, WALL, WALL)
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)
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rail_z = H - RAIL_H
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groove_h = RAIL_H - LIP_H
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# Rail grooves
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base = base.cut(
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box(L - WALL * 2, RAIL_D, groove_h,
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WALL, WALL - RAIL_D, rail_z)
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)
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base = base.cut(
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box(L - WALL * 2, RAIL_D, groove_h,
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WALL, W - WALL, rail_z)
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)
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# Lid lips
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lip_z = H - LIP_H
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base = base.fuse(
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box(L - WALL * 2, LIP_OVER, LIP_H,
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WALL, WALL, lip_z)
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)
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base = base.fuse(
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box(L - WALL * 2, LIP_OVER, LIP_H,
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WALL, W - WALL - LIP_OVER, lip_z)
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)
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# Back slot
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slot_y0 = WALL - RAIL_D
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slot_yw = W - WALL * 2 + RAIL_D * 2
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base = base.cut(
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box(WALL + 1.0, slot_yw, RAIL_H,
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L - WALL, slot_y0, rail_z)
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)
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# Entry bump
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BUMP_H = 0.5
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pad_raw = box(WALL, slot_yw, BUMP_H,
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L - WALL, slot_y0, rail_z)
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pad_trimmed = pad_raw.common(rbox(L, W, H))
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base = base.fuse(pad_trimmed)
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# Board clips
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clip_corners = [
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(BRD_X, BRD_Y, +1, +1),
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(BRD_X + BRD_L, BRD_Y, -1, +1),
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(BRD_X, BRD_Y + BRD_W, +1, -1),
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(BRD_X + BRD_L, BRD_Y + BRD_W, -1, -1),
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]
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for cx, cy, ix, iy in clip_corners:
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base = base.fuse(make_clip(cx, cy, ix, iy))
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# USB-C opening
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base = base.cut(
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rounded_slot(
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WALL * 3,
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USBC_W,
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USBC_H,
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-WALL,
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W / 2 - USBC_W / 2,
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USBC_Z
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)
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)
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# Battery recess
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base = base.cut(
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box(BAT_L, BAT_W, 3.0,
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BAT_X, BAT_Y, WALL)
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)
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clip_y_start = BAT_Y + BAT_W / 2 - BAT_CLIP_Y / 2
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base = base.fuse(
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box(2.0, BAT_CLIP_Y, BAT_H * 0.55,
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BAT_X - 2.0, clip_y_start, WALL)
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)
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base = base.fuse(
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box(2.0, BAT_CLIP_Y, BAT_H * 0.55,
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BAT_X + BAT_L, clip_y_start, WALL)
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)
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# Circular notch in back wall - centred on base
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notch_cz = rail_z + LID_H
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base = base.cut(circular_notch(L, W / 2, notch_cz, NOTCH_R, NOTCH_DEPTH))
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# Lid
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TAB_W = RAIL_D - TOL + 0.5
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LID_L = L - WALL * 2 - TOL
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LID_EXTRA_TOL = 0.5
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LID_W = (
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W - WALL * 2
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- (TOL + LID_EXTRA_TOL) * 2
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+ TAB_W * 2
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)
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lid_y0 = WALL + TOL + LID_EXTRA_TOL - TAB_W
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lid = box(LID_L, LID_W, LID_H, 0, lid_y0, 0)
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lid.translate(Base.Vector(WALL + TOL, 0, rail_z))
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# Final objects
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base_obj = doc.addObject("Part::Feature", "Pointer_Base")
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base_obj.Shape = base
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base_obj.ViewObject.ShapeColor = (0.12, 0.12, 0.14)
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lid_obj = doc.addObject("Part::Feature", "Pointer_Lid")
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lid_obj.Shape = lid
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lid_obj.ViewObject.ShapeColor = (0.28, 0.28, 0.34)
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lid_obj.ViewObject.Transparency = 25
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doc.recompute()
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Gui.activeDocument().activeView().viewIsometric()
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Gui.SendMsgToActiveView("ViewFit") |