460 lines
18 KiB
OpenSCAD
460 lines
18 KiB
OpenSCAD
// Generated by SolidPython 1.0.1 on 2020-11-03 14:22:51
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$fa = 0.4; $fs = 0.4;
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rotate(a = 180, v = [1, 0, 0]) {
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difference() {
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scale(v = [1, 1, -1]) {
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difference() {
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linear_extrude(height = 1.4500000000) {
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offset(r = 1.0000000000) {
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import(file = "/home/luca/projects/anykey/stencil/anykey-x2-EdgeCuts.dxf", origin = [0, 0]);
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}
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}
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translate(v = [0, 0, 0.1500000000]) {
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linear_extrude(height = 1.4500000000) {
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translate(v = [0, 0, 0]) {
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import(file = "/home/luca/projects/anykey/stencil/anykey-x2-EdgeCuts.dxf", origin = [0, 0]);
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}
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}
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}
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}
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}
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linear_extrude(center = true, height = 0.6000000000) {
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translate(v = [0, 0, 0]) {
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import(file = "/home/luca/projects/anykey/stencil/anykey-x2-PasteTop.dxf", origin = [0, 0]);
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}
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}
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}
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}
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/***********************************************
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********* SolidPython code: **********
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************************************************
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import pcbnew
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from pcbnew import wxPoint
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import numpy as np
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from kikit.common import *
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from kikit.defs import *
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from kikit.substrate import Substrate, extractRings, toShapely, linestringToKicad
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from kikit.export import gerberImpl, pasteDxfExport
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import solid
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import solid.utils
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import subprocess
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from kikit.common import removeComponents, parseReferences
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from shapely.geometry import Point
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from kikit import pcbnew_compatibility
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OUTER_BORDER = fromMm(7.5)
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INNER_BORDER = fromMm(5)
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MOUNTING_HOLES_COUNT = 3
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MOUNTING_HOLE_R = fromMm(1)
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HOLE_SPACING = fromMm(20)
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def addBottomCounterpart(board, item):
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item = item.Duplicate()
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item.SetLayer(Layer.B_Paste)
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board.Add(item)
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def addRoundedCorner(board, center, start, end, thickness):
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corner = pcbnew.PCB_SHAPE()
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corner.SetShape(STROKE_T.S_ARC)
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corner.SetCenter(wxPoint(center[0], center[1]))
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corner.SetArcStart(wxPoint(start[0], start[1]))
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if np.cross(start - center, end - center) > 0:
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corner.SetAngle(fromDegrees(90))
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else:
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corner.SetAngle(fromDegrees(-90))
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corner.SetWidth(thickness)
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corner.SetLayer(Layer.F_Paste)
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board.Add(corner)
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addBottomCounterpart(board, corner)
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def addLine(board, start, end, thickness):
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line = pcbnew.PCB_SHAPE()
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line.SetShape(STROKE_T.S_SEGMENT)
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line.SetStart(wxPoint(start[0], start[1]))
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line.SetEnd(wxPoint(end[0], end[1]))
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line.SetWidth(thickness)
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line.SetLayer(Layer.F_Paste)
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board.Add(line)
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addBottomCounterpart(board, line)
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def addBite(board, origin, direction, normal, thickness):
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"""
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Adds a bite to the stencil, direction points to the bridge, normal points
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inside the stencil
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"""
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direction = normalize(direction) * thickness
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normal = normalize(normal) * thickness
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center = wxPoint(origin[0], origin[1]) + wxPoint(normal[0], normal[1])
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start = origin
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end = center + wxPoint(direction[0], direction[1])
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# addLine(board, end, end + normal / 2, thickness)
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addRoundedCorner(board, center, start, end, thickness)
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def numberOfCuts(length, bridgeWidth, bridgeSpacing):
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"""
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Return number of bridges which fit inside the length and cut length
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"""
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count = int(np.floor((length + bridgeWidth) / (bridgeWidth + bridgeSpacing)))
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cutLength = (length - (count - 1) * bridgeWidth) / count
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return count, cutLength
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def addFrame(board, rect, bridgeWidth, bridgeSpacing, clearance):
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"""
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Add rectangular frame to the board
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"""
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R=fromMm(1)
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corners = [
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(tl(rect), wxPoint(R, 0), wxPoint(0, R)), # TL
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(tr(rect), wxPoint(0, R), wxPoint(-R, 0)), # TR
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(br(rect), wxPoint(-R, 0), wxPoint(0, -R)), # BR
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(bl(rect), wxPoint(0, -R), wxPoint(R, 0)) # BL
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]
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for c, sOffset, eOffset in corners:
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addRoundedCorner(board, c + sOffset + eOffset, c + sOffset, c + eOffset, clearance)
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count, cutLength = numberOfCuts(rect.GetWidth() - 2 * R, bridgeWidth, bridgeSpacing)
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for i in range(count):
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start = rect.GetX() + R + i * bridgeWidth + i * cutLength
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end = start + cutLength
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y1, y2 = rect.GetY(), rect.GetY() + rect.GetHeight()
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addLine(board, wxPoint(start, y1), wxPoint(end, y1), clearance)
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if i != 0:
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addBite(board, wxPoint(start, y1), wxPoint(-1, 0), wxPoint(0, 1), clearance)
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if i != count - 1:
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addBite(board, wxPoint(end, y1), wxPoint(1, 0), wxPoint(0, 1), clearance)
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addLine(board, wxPoint(start, y2), wxPoint(end, y2), clearance)
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if i != 0:
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addBite(board, wxPoint(start, y2), wxPoint(-1, 0), wxPoint(0, -1), clearance)
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if i != count - 1:
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addBite(board, wxPoint(end, y2), wxPoint(1, 0), wxPoint(0, -1), clearance)
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count, cutLength = numberOfCuts(rect.GetHeight() - 2 * R, bridgeWidth, bridgeSpacing)
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for i in range(count):
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start = rect.GetY() + R + i * bridgeWidth + i * cutLength
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end = start + cutLength
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x1, x2 = rect.GetX(), rect.GetX() + rect.GetWidth()
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addLine(board, wxPoint(x1, start), wxPoint(x1, end), clearance)
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if i != 0:
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addBite(board, wxPoint(x1, start), wxPoint(0, -1), wxPoint(1, 0), clearance)
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if i != count - 1:
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addBite(board, wxPoint(x1, end), wxPoint(0, 1), wxPoint(1, 0), clearance)
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addLine(board, wxPoint(x2, start), wxPoint(x2, end), clearance)
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if i != 0:
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addBite(board, wxPoint(x2, start), wxPoint(0, -1), wxPoint(-1, 0), clearance)
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if i != count - 1:
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addBite(board, wxPoint(x2, end), wxPoint(0, 1), wxPoint(-1, 0), clearance)
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def addHole(board, position, radius):
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circle = pcbnew.PCB_SHAPE()
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circle.SetShape(STROKE_T.S_CIRCLE)
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circle.SetCenter(wxPoint(position[0], position[1]))
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circle.SetArcStart(wxPoint(position[0], position[1]) + wxPoint(radius/2, 0))
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circle.SetWidth(radius)
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circle.SetLayer(Layer.F_Paste)
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board.Add(circle)
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addBottomCounterpart(board, circle)
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def addJigFrame(board, jigFrameSize, bridgeWidth=fromMm(2),
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bridgeSpacing=fromMm(10), clearance=fromMm(0.5)):
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"""
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Given a Pcbnew board finds the board outline and creates a stencil for
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KiKit's stencil jig.
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Mainly, adds mounting holes and mouse bites to define the panel outline.
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jigFrameSize is a tuple (width, height).
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"""
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bBox = findBoardBoundingBox(board)
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frameSize = rectByCenter(rectCenter(bBox),
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jigFrameSize[0] + 2 * (OUTER_BORDER + INNER_BORDER),
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jigFrameSize[1] + 2 * (OUTER_BORDER + INNER_BORDER))
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cutSize = rectByCenter(rectCenter(bBox),
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jigFrameSize[0] + 2 * (OUTER_BORDER + INNER_BORDER) - fromMm(1),
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jigFrameSize[1] + 2 * (OUTER_BORDER + INNER_BORDER) - fromMm(1))
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addFrame(board, cutSize, bridgeWidth, bridgeSpacing, clearance)
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for i in range(MOUNTING_HOLES_COUNT):
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x = frameSize.GetX() + OUTER_BORDER / 2 + (i + 1) * (frameSize.GetWidth() - OUTER_BORDER) / (MOUNTING_HOLES_COUNT + 1)
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addHole(board, wxPoint(x, OUTER_BORDER / 2 + frameSize.GetY()), MOUNTING_HOLE_R)
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addHole(board, wxPoint(x, - OUTER_BORDER / 2 +frameSize.GetY() + frameSize.GetHeight()), MOUNTING_HOLE_R)
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for i in range(MOUNTING_HOLES_COUNT):
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y = frameSize.GetY() + OUTER_BORDER / 2 + (i + 1) * (frameSize.GetHeight() - OUTER_BORDER) / (MOUNTING_HOLES_COUNT + 1)
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addHole(board, wxPoint(OUTER_BORDER / 2 + frameSize.GetX(), y), MOUNTING_HOLE_R)
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addHole(board, wxPoint(- OUTER_BORDER / 2 +frameSize.GetX() + frameSize.GetWidth(), y), MOUNTING_HOLE_R)
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PIN_TOLERANCE = fromMm(0.05)
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addHole(board, tl(frameSize) + wxPoint(OUTER_BORDER / 2, OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
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addHole(board, tr(frameSize) + wxPoint(-OUTER_BORDER / 2, OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
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addHole(board, br(frameSize) + wxPoint(-OUTER_BORDER / 2, -OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
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addHole(board, bl(frameSize) + wxPoint(OUTER_BORDER / 2, -OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
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def jigMountingHoles(jigFrameSize, origin=wxPoint(0, 0)):
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""" Get list of all mounting holes in a jig of given size """
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w, h = jigFrameSize
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holes = [
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wxPoint(0, (w + INNER_BORDER) / 2),
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wxPoint(0, -(w + INNER_BORDER) / 2),
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wxPoint((h + INNER_BORDER) / 2, 0),
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wxPoint(-(h + INNER_BORDER) / 2, 0),
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]
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return [x + origin for x in holes]
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def createOuterPolygon(board, jigFrameSize, outerBorder):
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bBox = findBoardBoundingBox(board)
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centerpoint = rectCenter(bBox)
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holes = jigMountingHoles(jigFrameSize, centerpoint)
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outerSubstrate = Substrate(collectEdges(board, "Edge.Cuts"))
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outerSubstrate.substrates = outerSubstrate.substrates.buffer(outerBorder)
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tabs = []
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for hole in holes:
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tab, _ = outerSubstrate.tab(hole, centerpoint - hole, INNER_BORDER, fromMm(1000))
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tabs.append(tab)
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outerSubstrate.union(tabs)
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outerSubstrate.union([Point(x).buffer(INNER_BORDER / 2) for x in holes])
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outerSubstrate.millFillets(fromMm(3))
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return outerSubstrate.exterior(), holes
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def createOffsetPolygon(board, offset):
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outerSubstrate = Substrate(collectEdges(board, "Edge.Cuts"))
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outerSubstrate.substrates = outerSubstrate.substrates.buffer(offset)
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return outerSubstrate.exterior()
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def m2countersink():
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HEAD_DIA = fromMm(4.5)
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HOLE_LEN = fromMm(10)
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SINK_EXTRA = fromMm(0.3)
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sinkH = np.sqrt(HEAD_DIA**2 / 4)
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sink = solid.cylinder(d1=0, d2=HEAD_DIA, h=sinkH)
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sinkE = solid.cylinder(d=HEAD_DIA, h=SINK_EXTRA)
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hole = solid.cylinder(h=HOLE_LEN, d=fromMm(2))
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return sinkE + solid.utils.down(sinkH)(sink) + solid.utils.down(HOLE_LEN)(hole)
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def mirrorX(linestring, origin):
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return [(2 * origin - x, y) for x, y in linestring]
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def makeRegister(board, jigFrameSize, jigThickness, pcbThickness,
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outerBorder, innerBorder, tolerance, topSide):
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bBox = findBoardBoundingBox(board)
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centerpoint = rectCenter(bBox)
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top = jigThickness - fromMm(0.15)
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pcbBottom = jigThickness - pcbThickness
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outerPolygon, holes = createOuterPolygon(board, jigFrameSize, outerBorder)
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outerRing = outerPolygon.exterior.coords
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if topSide:
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outerRing = mirrorX(outerRing, centerpoint[0])
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body = solid.linear_extrude(height=top, convexity=10)(solid.polygon(
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outerRing))
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innerRing = createOffsetPolygon(board, - innerBorder).exterior.coords
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if topSide:
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innerRing = mirrorX(innerRing, centerpoint[0])
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innerCutout = solid.utils.down(jigThickness)(
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solid.linear_extrude(height=3 * jigThickness, convexity=10)(solid.polygon(innerRing)))
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registerRing = createOffsetPolygon(board, tolerance).exterior.coords
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if topSide:
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registerRing = mirrorX(registerRing, centerpoint[0])
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registerCutout = solid.utils.up(jigThickness - pcbThickness)(
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solid.linear_extrude(height=jigThickness, convexity=10)(solid.polygon(registerRing)))
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register = body - innerCutout - registerCutout
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for hole in holes:
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register = register - solid.translate([hole[0], hole[1], top])(m2countersink())
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return solid.scale(toMm(1))(
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solid.translate([-centerpoint[0], -centerpoint[1], 0])(register))
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def makeTopRegister(board, jigFrameSize, jigThickness, pcbThickness,
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outerBorder=fromMm(3), innerBorder=fromMm(1),
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tolerance=fromMm(0.05)):
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"""
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Create a SolidPython representation of the top register
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"""
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print("Top")
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return makeRegister(board, jigFrameSize, jigThickness, pcbThickness,
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outerBorder, innerBorder, tolerance, True)
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def makeBottomRegister(board, jigFrameSize, jigThickness, pcbThickness,
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outerBorder=fromMm(3), innerBorder=fromMm(1),
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tolerance=fromMm(0.05)):
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"""
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Create a SolidPython representation of the top register
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"""
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print("Bottom")
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return makeRegister(board, jigFrameSize, jigThickness, pcbThickness,
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outerBorder, innerBorder, tolerance, False)
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def renderScad(infile, outfile):
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infile = os.path.abspath(infile)
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outfile = os.path.abspath(outfile)
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subprocess.check_call(["openscad", "-o", outfile, infile])
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def shapelyToSHAPE_POLY_SET(polygon):
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p = pcbnew.SHAPE_POLY_SET()
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print(polygon.exterior)
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p.AddOutline(linestringToKicad(polygon.exterior))
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return p
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def cutoutComponents(board, components):
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topCutout = extractComponentPolygons(components, "F.CrtYd")
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for polygon in topCutout:
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zone = pcbnew.PCB_SHAPE()
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zone.SetShape(STROKE_T.S_POLYGON)
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zone.SetPolyShape(shapelyToSHAPE_POLY_SET(polygon))
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zone.SetLayer(Layer.F_Paste)
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board.Add(zone)
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bottomCutout = extractComponentPolygons(components, "B.CrtYd")
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for polygon in bottomCutout:
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zone = pcbnew.PCB_SHAPE()
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zone.SetShape(STROKE_T.S_POLYGON)
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zone.SetPolyShape(shapelyToSHAPE_POLY_SET(polygon))
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zone.SetLayer(Layer.B_Paste)
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board.Add(zone)
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from pathlib import Path
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import os
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def create(inputboard, outputdir, jigsize, jigthickness, pcbthickness,
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registerborder, tolerance, ignore, cutout):
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board = pcbnew.LoadBoard(inputboard)
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refs = parseReferences(ignore)
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removeComponents(board, refs)
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Path(outputdir).mkdir(parents=True, exist_ok=True)
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jigsize = (fromMm(jigsize[0]), fromMm(jigsize[1]))
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addJigFrame(board, jigsize)
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cutoutComponents(board, getComponents(board, parseReferences(cutout)))
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stencilFile = os.path.join(outputdir, "stencil.kicad_pcb")
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board.Save(stencilFile)
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plotPlan = [
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# name, id, comment
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("PasteBottom", pcbnew.B_Paste, "Paste Bottom"),
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("PasteTop", pcbnew.F_Paste, "Paste top"),
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]
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gerberDir = os.path.join(outputdir, "gerber")
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gerberImpl(stencilFile, gerberDir, plotPlan, False)
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gerbers = [os.path.join(gerberDir, x) for x in os.listdir(gerberDir)]
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subprocess.check_call(["zip", "-j",
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os.path.join(outputdir, "gerbers.zip")] + gerbers)
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jigthickness = fromMm(jigthickness)
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pcbthickness = fromMm(pcbthickness)
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outerBorder, innerBorder = fromMm(registerborder[0]), fromMm(registerborder[1])
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tolerance = fromMm(tolerance)
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topRegister = makeTopRegister(board, jigsize,jigthickness, pcbthickness,
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outerBorder, innerBorder, tolerance)
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bottomRegister = makeBottomRegister(board, jigsize,jigthickness, pcbthickness,
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outerBorder, innerBorder, tolerance)
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topRegisterFile = os.path.join(outputdir, "topRegister.scad")
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solid.scad_render_to_file(topRegister, topRegisterFile)
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renderScad(topRegisterFile, os.path.join(outputdir, "topRegister.stl"))
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bottomRegisterFile = os.path.join(outputdir, "bottomRegister.scad")
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solid.scad_render_to_file(bottomRegister, bottomRegisterFile)
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renderScad(bottomRegisterFile, os.path.join(outputdir, "bottomRegister.stl"))
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def printedStencilSubstrate(outlineDxf, thickness, frameHeight, frameWidth, frameClearance):
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bodyOffset = solid.utils.up(0) if frameWidth + frameClearance == 0 else solid.offset(r=frameWidth + frameClearance)
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body = solid.linear_extrude(height=thickness + frameHeight)(
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bodyOffset(solid.import_dxf(outlineDxf)))
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boardOffset = solid.utils.up(0) if frameClearance == 0 else solid.offset(r=frameClearance)
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board = solid.utils.up(thickness)(
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solid.linear_extrude(height=thickness + frameHeight)(
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boardOffset(solid.import_dxf(outlineDxf))))
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return body - board
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def getComponents(board, references):
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"""
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Return a list of components based on designator
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"""
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return [m for m in board.GetModules() if m.GetReference() in references]
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def collectModuleEdges(module, layerName):
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"""
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Return all edges on given layer in given module
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"""
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return [e for e in module.GraphicalItems() if e.GetLayerName() == layerName]
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def extractComponentPolygons(modules, srcLayer):
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"""
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Return a list of shapely polygons with holes for already placed components.
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The source layer defines the geometry on which the cutout is computed.
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Usually it a font or back courtyard
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"""
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polygons = []
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for m in modules:
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edges = collectModuleEdges(m, srcLayer)
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for ring in extractRings(edges):
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polygons.append(toShapely(ring, edges))
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return polygons
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def printedStencil(outlineDxf, holesDxf, extraHoles, thickness, frameHeight, frameWidth,
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frameClearance, enlargeHoles, front):
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zScale = -1 if front else 1
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xRotate = 180 if front else 0
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substrate = solid.scale([1, 1, zScale])(printedStencilSubstrate(outlineDxf,
|
|
thickness, frameHeight, frameWidth, frameClearance))
|
|
holesOffset = solid.utils.up(0) if enlargeHoles == 0 else solid.offset(delta=enlargeHoles)
|
|
holes = solid.linear_extrude(height=4*thickness, center=True)(
|
|
holesOffset(solid.import_dxf(holesDxf)))
|
|
substrate -= holes
|
|
for h in extraHoles:
|
|
substrate -= solid.scale([toMm(1), -toMm(1), 1])(
|
|
solid.linear_extrude(height=4*thickness, center=True)(
|
|
solid.polygon(h.exterior.coords)))
|
|
return solid.rotate(a=xRotate, v=[1, 0, 0])(substrate)
|
|
|
|
def createPrinted(inputboard, outputdir, pcbthickness, thickness, framewidth,
|
|
ignore, cutout, frameclearance, enlargeholes):
|
|
"""
|
|
Create a 3D printed self-registering stencil.
|
|
"""
|
|
board = pcbnew.LoadBoard(inputboard)
|
|
refs = parseReferences(ignore)
|
|
cutoutComponents = getComponents(board, parseReferences(cutout))
|
|
removeComponents(board, refs)
|
|
Path(outputdir).mkdir(parents=True, exist_ok=True)
|
|
|
|
# We create the stencil based on DXF export. Using it avoids the necessity
|
|
# to interpret KiCAD PAD shapes which constantly change with newer and newer
|
|
# versions.
|
|
height = min(pcbthickness, max(0.5, pcbthickness - 0.3))
|
|
bottomPaste, topPaste, outline = pasteDxfExport(board, outputdir)
|
|
topCutout = extractComponentPolygons(cutoutComponents, "F.CrtYd")
|
|
bottomCutout = extractComponentPolygons(cutoutComponents, "B.CrtYd")
|
|
topStencil = printedStencil(outline, topPaste, topCutout, thickness, height,
|
|
framewidth, frameclearance, enlargeholes, True)
|
|
bottomStencil = printedStencil(outline, bottomPaste, bottomCutout, thickness,
|
|
height, framewidth, frameclearance, enlargeholes, False)
|
|
|
|
bottomStencilFile = os.path.join(outputdir, "bottomStencil.scad")
|
|
solid.scad_render_to_file(bottomStencil, bottomStencilFile,
|
|
file_header=f'$fa = 0.4; $fs = 0.4;', include_orig_code=True)
|
|
renderScad(bottomStencilFile, os.path.join(outputdir, "bottomStencil.stl"))
|
|
|
|
topStencilFile = os.path.join(outputdir, "topStencil.scad")
|
|
solid.scad_render_to_file(topStencil, topStencilFile,
|
|
file_header=f'$fa = 0.4; $fs = 0.4;', include_orig_code=True)
|
|
renderScad(topStencilFile, os.path.join(outputdir, "topStencil.stl"))
|
|
|
|
|
|
|
|
|
|
|
|
************************************************/
|