B4L/kicad-zone-resistance
5
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 6 Wiki Activity

Solder coat only on the solder side of a THT joint
Build PCM package / build (push) Successful in 6s
Details

Browse Source 
The pad face is wetted where the joint is: the protrusion side,
opposite the component (already read from the owning footprint). The
component-side pad face stays bare - contact_solder_buildups and
tht_joint_buildups no longer coat both outer layers.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
janik
2026-07-16 19:05:06 +07:00
parent b2277f65bf
commit 38b6e34bfa
3 changed files with 50 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fill_resistance/geometry.py
+29 -24
View File
@@ -105,8 +105,10 @@ class Electrode:
lead/wire soldered into the hole), so the contact cells are the
copper ring at the drill wall, not the whole pad face. `solder`
additionally models a soldered THT joint: the hole is filled with
solder and the pad face carries an average-thickness solder coat
(Problem.solder_thickness_nm over `polygons`)."""
solder and the pad face on the SOLDER side (protrusion_side,
opposite the component) carries an average-thickness solder coat
(Problem.solder_thickness_nm over `polygons`) plus the
protruding-lead cone."""
rect: Rect # bounding box (labels/summary)
contact: str = "all"
polygons: list[Polygon] | None = None
@@ -217,21 +219,23 @@ class Problem:
def contact_solder_buildups(problem: Problem) -> list[str]:
"""Soldered THT-joint contacts: the pad face is covered in solder of
average thickness solder_thickness_nm. Adds one SurfaceBuildup per
outer layer for every `solder` electrode's pad shape (the buildup
machinery intersects with actual copper at raster time). Returns the
affected layer names. Called once when the problem is built."""
"""Soldered THT-joint contacts: the pad face on the SOLDER side (the
protrusion side, opposite the component - the component-side face
stays bare) is covered in solder of average thickness
solder_thickness_nm. Adds one SurfaceBuildup there for every
`solder` electrode's pad shape (the buildup machinery intersects
with actual copper at raster time). Returns the affected layer
names. Called once when the problem is built."""
included = {l.layer_name for l in problem.layers}
outer = [n for n in ("F.Cu", "B.Cu") if n in included]
touched = []
for e in problem.electrodes1 + problem.electrodes2:
if not e.solder or not e.polygons:
if not e.solder or not e.polygons \
or e.protrusion_side not in included:
continue
for name in outer:
problem.buildups.append(
SurfaceBuildup(layer_name=name, polygons=list(e.polygons)))
touched.append(name)
problem.buildups.append(
SurfaceBuildup(layer_name=e.protrusion_side,
polygons=list(e.polygons)))
touched.append(e.protrusion_side)
return sorted(set(touched))
@@ -245,25 +249,26 @@ def _disc_polygon(x_nm: float, y_nm: float, r_nm: float,
def tht_joint_buildups(problem: Problem) -> list[str]:
"""Solder coat of the net's populated STITCHING through-hole pads
(ViaLink kind 'pad' with solder_filled): one pad-diameter disc per
outer layer - the exact pad shape is unknown for non-contact pads,
and the coat intersects the modeled copper at raster time anyway.
Contact pads are skipped: contact_solder_buildups already coats
them with the exact pad shape. Returns the affected layer names."""
(ViaLink kind 'pad' with solder_filled): one pad-diameter disc on
the pad's SOLDER side (the protrusion side, opposite the component;
the component-side face stays bare). The exact pad shape is unknown
for non-contact pads, and the coat intersects the modeled copper at
raster time anyway. Contact pads are skipped:
contact_solder_buildups already coats them with the exact pad
shape. Returns the affected layer names."""
included = {l.layer_name for l in problem.layers}
outer = [n for n in ("F.Cu", "B.Cu") if n in included]
contacts = {e.center for e in problem.electrodes1 + problem.electrodes2
if e.drill_nm > 0 and e.center is not None}
touched = []
for v in problem.vias:
if v.kind != "pad" or not v.solder_filled \
or v.pad_nm <= v.drill_nm or (v.x, v.y) in contacts:
or v.pad_nm <= v.drill_nm or (v.x, v.y) in contacts \
or v.protrusion_side not in included:
continue
disc = _disc_polygon(v.x, v.y, v.pad_nm / 2.0)
for name in outer:
problem.buildups.append(
SurfaceBuildup(layer_name=name, polygons=[disc]))
touched.append(name)
problem.buildups.append(
SurfaceBuildup(layer_name=v.protrusion_side, polygons=[disc]))
touched.append(v.protrusion_side)
return sorted(set(touched))