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StencilType: SolderPaste or Adhesive
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Wannes Sels committed Jun 16, 2022
1 parent ad7bc25 commit a778e72
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Showing 2 changed files with 97 additions and 73 deletions.
125 changes: 67 additions & 58 deletions kikit/stencil.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -25,12 +25,22 @@
MOUNTING_HOLE_R = fromMm(1)
HOLE_SPACING = fromMm(20)

def addBottomCounterpart(board, item):

class StencilType(Enum):
SolderPaste = (LayerToPlot.PasteTop, LayerToPlot.PasteBottom)
Adhesive = (LayerToPlot.AdhesiveTop, LayerToPlot.AdhesiveBottom)

def __init__(self, top_layer: LayerToPlot, bottom_layer: LayerToPlot):
self.top_layer = top_layer
self.bottom_layer = bottom_layer


def addBottomCounterpart(board, item, stencil_type: StencilType):
item = item.Duplicate()
item.SetLayer(Layer.B_Paste)
item.SetLayer(stencil_type.bottom_layer.id)
board.Add(item)

def addRoundedCorner(board, center, start, end, thickness):
def addRoundedCorner(board, center, start, end, thickness, stencil_type: StencilType):
corner = pcbnew.PCB_SHAPE()
corner.SetShape(STROKE_T.S_ARC)
corner.SetCenter(wxPoint(center[0], center[1]))
Expand All @@ -50,21 +60,21 @@ def addRoundedCorner(board, center, start, end, thickness):
else:
corner.SetAngle(fromDegrees(-90))
corner.SetWidth(thickness)
corner.SetLayer(Layer.F_Paste)
corner.SetLayer(stencil_type.top_layer.id)
board.Add(corner)
addBottomCounterpart(board, corner)
addBottomCounterpart(board, corner, stencil_type)

def addLine(board, start, end, thickness):
def addLine(board, start, end, thickness, stencil_type: StencilType):
line = pcbnew.PCB_SHAPE()
line.SetShape(STROKE_T.S_SEGMENT)
line.SetStart(wxPoint(start[0], start[1]))
line.SetEnd(wxPoint(end[0], end[1]))
line.SetWidth(thickness)
line.SetLayer(Layer.F_Paste)
line.SetLayer(stencil_type.top_layer.id)
board.Add(line)
addBottomCounterpart(board, line)
addBottomCounterpart(board, line, stencil_type)

def addBite(board, origin, direction, normal, thickness):
def addBite(board, origin, direction, normal, thickness, stencil_type: StencilType):
"""
Adds a bite to the stencil, direction points to the bridge, normal points
inside the stencil
Expand All @@ -75,7 +85,7 @@ def addBite(board, origin, direction, normal, thickness):
start = origin
end = center + wxPoint(direction[0], direction[1])
# addLine(board, end, end + normal / 2, thickness)
addRoundedCorner(board, center, start, end, thickness)
addRoundedCorner(board, center, start, end, thickness, stencil_type)

def numberOfCuts(length, bridgeWidth, bridgeSpacing):
"""
Expand All @@ -85,7 +95,8 @@ def numberOfCuts(length, bridgeWidth, bridgeSpacing):
cutLength = (length - (count - 1) * bridgeWidth) / count
return count, cutLength

def addFrame(board, rect, bridgeWidth, bridgeSpacing, clearance):

def addFrame(board, rect, bridgeWidth, bridgeSpacing, clearance, stencil_type: StencilType):
"""
Add rectangular frame to the board
"""
Expand All @@ -98,43 +109,44 @@ def addFrame(board, rect, bridgeWidth, bridgeSpacing, clearance):
(bl(rect), wxPoint(0, -R), wxPoint(R, 0)) # BL
]
for c, sOffset, eOffset in corners:
addRoundedCorner(board, c + sOffset + eOffset, c + sOffset, c + eOffset, clearance)
addRoundedCorner(board, c + sOffset + eOffset, c + sOffset, c + eOffset, clearance, stencil_type)

count, cutLength = numberOfCuts(rect.GetWidth() - 2 * R, bridgeWidth, bridgeSpacing)
for i in range(count):
start = rect.GetX() + R + i * bridgeWidth + i * cutLength
end = start + cutLength

y1, y2 = rect.GetY(), rect.GetY() + rect.GetHeight()
addLine(board, wxPoint(start, y1), wxPoint(end, y1), clearance)
addLine(board, wxPoint(start, y1), wxPoint(end, y1), clearance, stencil_type)
if i != 0:
addBite(board, wxPoint(start, y1), wxPoint(-1, 0), wxPoint(0, 1), clearance)
addBite(board, wxPoint(start, y1), wxPoint(-1, 0), wxPoint(0, 1), clearance, stencil_type)
if i != count - 1:
addBite(board, wxPoint(end, y1), wxPoint(1, 0), wxPoint(0, 1), clearance)
addLine(board, wxPoint(start, y2), wxPoint(end, y2), clearance)
addBite(board, wxPoint(end, y1), wxPoint(1, 0), wxPoint(0, 1), clearance, stencil_type)
addLine(board, wxPoint(start, y2), wxPoint(end, y2), clearance, stencil_type)
if i != 0:
addBite(board, wxPoint(start, y2), wxPoint(-1, 0), wxPoint(0, -1), clearance)
addBite(board, wxPoint(start, y2), wxPoint(-1, 0), wxPoint(0, -1), clearance, stencil_type)
if i != count - 1:
addBite(board, wxPoint(end, y2), wxPoint(1, 0), wxPoint(0, -1), clearance)
addBite(board, wxPoint(end, y2), wxPoint(1, 0), wxPoint(0, -1), clearance, stencil_type)

count, cutLength = numberOfCuts(rect.GetHeight() - 2 * R, bridgeWidth, bridgeSpacing)
for i in range(count):
start = rect.GetY() + R + i * bridgeWidth + i * cutLength
end = start + cutLength

x1, x2 = rect.GetX(), rect.GetX() + rect.GetWidth()
addLine(board, wxPoint(x1, start), wxPoint(x1, end), clearance)
addLine(board, wxPoint(x1, start), wxPoint(x1, end), clearance, stencil_type)
if i != 0:
addBite(board, wxPoint(x1, start), wxPoint(0, -1), wxPoint(1, 0), clearance)
addBite(board, wxPoint(x1, start), wxPoint(0, -1), wxPoint(1, 0), clearance, stencil_type)
if i != count - 1:
addBite(board, wxPoint(x1, end), wxPoint(0, 1), wxPoint(1, 0), clearance)
addLine(board, wxPoint(x2, start), wxPoint(x2, end), clearance)
addBite(board, wxPoint(x1, end), wxPoint(0, 1), wxPoint(1, 0), clearance, stencil_type)
addLine(board, wxPoint(x2, start), wxPoint(x2, end), clearance, stencil_type)
if i != 0:
addBite(board, wxPoint(x2, start), wxPoint(0, -1), wxPoint(-1, 0), clearance)
addBite(board, wxPoint(x2, start), wxPoint(0, -1), wxPoint(-1, 0), clearance, stencil_type)
if i != count - 1:
addBite(board, wxPoint(x2, end), wxPoint(0, 1), wxPoint(-1, 0), clearance)
addBite(board, wxPoint(x2, end), wxPoint(0, 1), wxPoint(-1, 0), clearance, stencil_type)


def addHole(board, position, radius):
def addHole(board, position, radius, stencil_type: StencilType):
circle = pcbnew.PCB_SHAPE()
circle.SetShape(STROKE_T.S_CIRCLE)
circle.SetCenter(wxPoint(position[0], position[1]))
Expand All @@ -144,12 +156,12 @@ def addHole(board, position, radius):
else:
circle.SetArcStart(wxPoint(position[0], position[1]) + wxPoint(radius/2, 0))
circle.SetWidth(radius)
circle.SetLayer(Layer.F_Paste)
circle.SetLayer(stencil_type.top_layer.id)
board.Add(circle)
addBottomCounterpart(board, circle)
addBottomCounterpart(board, circle, stencil_type)

def addJigFrame(board, jigFrameSize, bridgeWidth=fromMm(2),
bridgeSpacing=fromMm(10), clearance=fromMm(0.5)):
bridgeSpacing=fromMm(10), clearance=fromMm(0.5), stencil_type: StencilType = StencilType.SolderPaste):
"""
Given a Pcbnew board finds the board outline and creates a stencil for
KiKit's stencil jig.
Expand All @@ -165,22 +177,22 @@ def addJigFrame(board, jigFrameSize, bridgeWidth=fromMm(2),
cutSize = rectByCenter(rectCenter(bBox),
jigFrameSize[0] + 2 * (OUTER_BORDER + INNER_BORDER) - fromMm(1),
jigFrameSize[1] + 2 * (OUTER_BORDER + INNER_BORDER) - fromMm(1))
addFrame(board, cutSize, bridgeWidth, bridgeSpacing, clearance)
addFrame(board, cutSize, bridgeWidth, bridgeSpacing, clearance, stencil_type)

for i in range(MOUNTING_HOLES_COUNT):
x = frameSize.GetX() + OUTER_BORDER / 2 + (i + 1) * (frameSize.GetWidth() - OUTER_BORDER) / (MOUNTING_HOLES_COUNT + 1)
addHole(board, wxPoint(x, OUTER_BORDER / 2 + frameSize.GetY()), MOUNTING_HOLE_R)
addHole(board, wxPoint(x, - OUTER_BORDER / 2 +frameSize.GetY() + frameSize.GetHeight()), MOUNTING_HOLE_R)
addHole(board, wxPoint(x, OUTER_BORDER / 2 + frameSize.GetY()), MOUNTING_HOLE_R, stencil_type)
addHole(board, wxPoint(x, - OUTER_BORDER / 2 +frameSize.GetY() + frameSize.GetHeight()), MOUNTING_HOLE_R, stencil_type)
for i in range(MOUNTING_HOLES_COUNT):
y = frameSize.GetY() + OUTER_BORDER / 2 + (i + 1) * (frameSize.GetHeight() - OUTER_BORDER) / (MOUNTING_HOLES_COUNT + 1)
addHole(board, wxPoint(OUTER_BORDER / 2 + frameSize.GetX(), y), MOUNTING_HOLE_R)
addHole(board, wxPoint(- OUTER_BORDER / 2 +frameSize.GetX() + frameSize.GetWidth(), y), MOUNTING_HOLE_R)
addHole(board, wxPoint(OUTER_BORDER / 2 + frameSize.GetX(), y), MOUNTING_HOLE_R, stencil_type)
addHole(board, wxPoint(- OUTER_BORDER / 2 +frameSize.GetX() + frameSize.GetWidth(), y), MOUNTING_HOLE_R, stencil_type)

PIN_TOLERANCE = fromMm(0.05)
addHole(board, tl(frameSize) + wxPoint(OUTER_BORDER / 2, OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
addHole(board, tr(frameSize) + wxPoint(-OUTER_BORDER / 2, OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
addHole(board, br(frameSize) + wxPoint(-OUTER_BORDER / 2, -OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
addHole(board, bl(frameSize) + wxPoint(OUTER_BORDER / 2, -OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE)
addHole(board, tl(frameSize) + wxPoint(OUTER_BORDER / 2, OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE, stencil_type)
addHole(board, tr(frameSize) + wxPoint(-OUTER_BORDER / 2, OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE, stencil_type)
addHole(board, br(frameSize) + wxPoint(-OUTER_BORDER / 2, -OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE, stencil_type)
addHole(board, bl(frameSize) + wxPoint(OUTER_BORDER / 2, -OUTER_BORDER / 2), MOUNTING_HOLE_R + PIN_TOLERANCE, stencil_type)

def jigMountingHoles(jigFrameSize, origin=wxPoint(0, 0)):
""" Get list of all mounting holes in a jig of given size """
Expand Down Expand Up @@ -299,20 +311,20 @@ def shapelyToSHAPE_POLY_SET(polygon):
p.AddOutline(linestringToKicad(polygon.exterior))
return p

def cutoutComponents(board, components):
topCutout = extractComponentPolygons(components, "F.CrtYd")
def cutoutComponents(board, components, stencil_type: StencilType):
topCutout = extractComponentPolygons(components, Layer.F_CrtYd)
for polygon in topCutout:
zone = pcbnew.PCB_SHAPE()
zone.SetShape(STROKE_T.S_POLYGON)
zone.SetPolyShape(shapelyToSHAPE_POLY_SET(polygon))
zone.SetLayer(Layer.F_Paste)
zone.SetLayer(stencil_type.top_layer.id)
board.Add(zone)
bottomCutout = extractComponentPolygons(components, "B.CrtYd")
bottomCutout = extractComponentPolygons(components, Layer.B_CrtYd)
for polygon in bottomCutout:
zone = pcbnew.PCB_SHAPE()
zone.SetShape(STROKE_T.S_POLYGON)
zone.SetPolyShape(shapelyToSHAPE_POLY_SET(polygon))
zone.SetLayer(Layer.B_Paste)
zone.SetLayer(stencil_type.bottom_layer.id)
board.Add(zone)

def setStencilLayerVisibility(boardName):
Expand Down Expand Up @@ -358,22 +370,21 @@ def setStencilLayerVisibility(boardName):
import os

def create(inputboard, outputdir, jigsize, jigthickness, pcbthickness,
registerborder, tolerance, ignore, cutout):
registerborder, tolerance, ignore, cutout, type: StencilType = StencilType.SolderPaste):
board = pcbnew.LoadBoard(inputboard)
refs = parseReferences(ignore)
removeComponents(board, refs)
removeComponents(board, parseReferences(ignore))
cutoutComponents(board, getComponents(board, parseReferences(cutout)), type)

Path(outputdir).mkdir(parents=True, exist_ok=True)

jigsize = (fromMm(jigsize[0]), fromMm(jigsize[1]))
addJigFrame(board, jigsize)
cutoutComponents(board, getComponents(board, parseReferences(cutout)))
addJigFrame(board, jigsize, stencil_type=type)

stencilFile = os.path.join(outputdir, "stencil.kicad_pcb")
board.Save(stencilFile)

setStencilLayerVisibility(inputboard)
plot_plan = [LayerToPlot.PasteTop, LayerToPlot.PasteBottom]
plot_plan = [type.top_layer, type.bottom_layer]

# get a copy of exportSettingsJlcpcb dictionary and
# exclude the Edge.Cuts layer for creation of stencil gerber files
Expand All @@ -387,10 +398,8 @@ def create(inputboard, outputdir, jigsize, jigthickness, pcbthickness,
pcbthickness = fromMm(pcbthickness)
outerBorder, innerBorder = fromMm(registerborder[0]), fromMm(registerborder[1])
tolerance = fromMm(tolerance)
topRegister = makeTopRegister(board, jigsize,jigthickness, pcbthickness,
outerBorder, innerBorder, tolerance)
bottomRegister = makeBottomRegister(board, jigsize,jigthickness, pcbthickness,
outerBorder, innerBorder, tolerance)
topRegister = makeTopRegister(board, jigsize,jigthickness, pcbthickness, outerBorder, innerBorder, tolerance)
bottomRegister = makeBottomRegister(board, jigsize,jigthickness, pcbthickness, outerBorder, innerBorder, tolerance)

topRegisterFile = os.path.join(outputdir, "topRegister.scad")
solid.scad_render_to_file(topRegister, topRegisterFile)
Expand All @@ -416,21 +425,21 @@ def getComponents(board, references):
"""
return [f for f in board.GetFootprints() if f.GetReference() in references]

def collectFootprintEdges(footprint, layerName):
def collectFootprintEdges(footprint, layer: Layer):
"""
Return all edges on given layer in given footprint
"""
return [e for e in footprint.GraphicalItems() if e.GetLayerName() == layerName]
return [e for e in footprint.GraphicalItems() if e.GetLayer() == layer]

def extractComponentPolygons(footprints, srcLayer):
def extractComponentPolygons(footprints, layer: Layer):
"""
Return a list of shapely polygons with holes for already placed components.
The source layer defines the geometry on which the cutout is computed.
Usually it a font or back courtyard
"""
polygons = []
for f in footprints:
edges = collectFootprintEdges(f, srcLayer)
edges = collectFootprintEdges(f, layer)
for ring in extractRings(edges):
polygons.append(toShapely(ring, edges))
return polygons
Expand Down Expand Up @@ -474,8 +483,8 @@ def createPrinted(inputboard, outputdir, pcbthickness, thickness, framewidth,
topPaste = topPaste.replace("\\", "/")
outline = outline.replace("\\", "/")

topCutout = extractComponentPolygons(cutoutComponents, "F.CrtYd")
bottomCutout = extractComponentPolygons(cutoutComponents, "B.CrtYd")
topCutout = extractComponentPolygons(cutoutComponents, Layer.F_CrtYd)
bottomCutout = extractComponentPolygons(cutoutComponents, Layer.B_CrtYd)
topStencil = printedStencil(outline, topPaste, topCutout, thickness, height,
framewidth, frameclearance, enlargeholes, True)
bottomStencil = printedStencil(outline, bottomPaste, bottomCutout, thickness,
Expand Down
45 changes: 30 additions & 15 deletions kikit/stencil_ui.py
View file
Original file line number Diff line number Diff line change
@@ -1,5 +1,26 @@
import click
import enum
import sys
import typing

import click
from click import Choice
from kikit.stencil import StencilType


# from https://github.com/pallets/click/pull/2210/files#diff-dcb534e6a7591b92836537d4655ddbd2f18e3b293c3420144c30a9ca08f65c4e
class EnumChoice(Choice):
def __init__(self, enum_type: typing.Type[enum.Enum], case_sensitive: bool = True):
super().__init__(
choices=[element.name for element in enum_type],
case_sensitive=case_sensitive,
)
self.enum_type = enum_type

def convert(self, value: typing.Any, param: typing.Optional["Parameter"], ctx: typing.Optional["Context"]) -> typing.Any:
value = super().convert(value=value, param=param, ctx=ctx)
if value is None:
return None
return self.enum_type[value]


@click.command()
Expand Down Expand Up @@ -32,20 +53,14 @@ def createPrinted(**kwargs):
@click.command()
@click.argument("inputBoard", type=click.Path(dir_okay=False))
@click.argument("outputDir", type=click.Path(dir_okay=True))
@click.option("--jigsize", type=(int, int), default=(100, 100),
help="Jig frame size in mm: <width> <height>")
@click.option("--jigthickness", type=float, default=3,
help="Jig thickness in mm")
@click.option("--pcbthickness", type=float, default=1.6,
help="PCB thickness in mm")
@click.option("--registerborder", type=(float, float), default=(3, 1),
help="Register borders in mm: <outer> <inner>")
@click.option("--tolerance", type=float, default=0.05,
help="Enlarges the register by the tolerance value")
@click.option("--ignore", type=str, default="",
help="Comma separated list of components references to exclude from the stencil")
@click.option("--cutout", type=str, default="",
help="Comma separated list of components references to cutout from the stencil based on the courtyard")
@click.option("--jigsize", type=(int, int), default=(100, 100), help="Jig frame size in mm: <width> <height>")
@click.option("--jigthickness", type=float, default=3, help="Jig thickness in mm")
@click.option("--pcbthickness", type=float, default=1.6, help="PCB thickness in mm")
@click.option("--registerborder", type=(float, float), default=(3, 1), help="Register borders in mm: <outer> <inner>")
@click.option("--tolerance", type=float, default=0.05, help="Enlarges the register by the tolerance value")
@click.option("--ignore", type=str, default="", help="Comma separated list of components references to exclude from the stencil")
@click.option("--cutout", type=str, default="", help="Comma separated list of components references to cutout from the stencil based on the courtyard")
@click.option("--type", type=EnumChoice(StencilType, case_sensitive=False), default="solderpaste", help="Stencil for SolderPaste or Adhesive")
def create(**kwargs):
"""
Create stencil and register elements for manual paste dispensing jig.
Expand Down

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