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Best effort to generate isolation path cutting on the conventional side

This commit is contained in:
phdussud 2015-06-19 16:25:22 -07:00
parent cd39a55696
commit f5e481d1fa
2 changed files with 29 additions and 6 deletions
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29
FlatCAMObj.py
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@ -441,6 +441,26 @@ class FlatCAMGerber(FlatCAMObj, Gerber):
base_name = self.options["name"] + "_iso"
base_name = outname or base_name
def generate_envelope (offset, invert):
# isolation_geometry produces an envelope that is going on the left of the geometry
# (the copper features). To leave the least amount of burrs on the features
# the tool needs to travel on the right side of the features (this is called conventional milling)
# the first pass is the one cutting all of the features, so it needs to be reversed
# the other passes overlap preceding ones and cut the left over copper. It is better for them
# to cut on the right side of the left over copper i.e on the left side of the features.
geom = self.isolation_geometry(offset)
if invert:
if type(geom) is MultiPolygon:
pl = []
for p in geom:
pl.append(Polygon (p.exterior.coords[::-1], p.interiors))
geom = MultiPolygon(pl)
elif type(geom) is Polygon:
geom = Polygon (geom.exterior.coords[::-1], geom.interiors);
else:
raise "Unexpected Geometry"
return geom
if (combine):
iso_name = base_name
@ -451,7 +471,8 @@ class FlatCAMGerber(FlatCAMObj, Gerber):
geo_obj.solid_geometry = []
for i in range(passes):
offset = (2 * i + 1) / 2.0 * dia - i * overlap * dia
geo_obj.solid_geometry.append(self.isolation_geometry(offset))
geom = generate_envelope (offset, i == 0)
geo_obj.solid_geometry.append(geom)
app_obj.info("Isolation geometry created: %s" % geo_obj.options["name"])
# TODO: Do something if this is None. Offer changing name?
@ -470,7 +491,7 @@ class FlatCAMGerber(FlatCAMObj, Gerber):
def iso_init(geo_obj, app_obj):
# Propagate options
geo_obj.options["cnctooldia"] = self.options["isotooldia"]
geo_obj.solid_geometry = self.isolation_geometry(offset)
geo_obj.solid_geometry = generate_envelope (offset, i == 0)
app_obj.info("Isolation geometry created: %s" % geo_obj.options["name"])
# TODO: Do something if this is None. Offer changing name?
@ -1062,7 +1083,7 @@ class FlatCAMGeometry(FlatCAMObj, Geometry):
z_move = z_move if z_move is not None else self.options["travelz"]
feedrate = feedrate if feedrate is not None else self.options["feedrate"]
tooldia = tooldia if tooldia is not None else self.options["cnctooldia"]
# Object initialization function for app.new_object()
# RUNNING ON SEPARATE THREAD!
def job_init(job_obj, app_obj):
@ -1220,4 +1241,4 @@ class FlatCAMGeometry(FlatCAMObj, Geometry):
self.plot_element(self.solid_geometry)
self.app.plotcanvas.auto_adjust_axes()
self.app.plotcanvas.auto_adjust_axes()

6
camlib.py
View File

@ -540,7 +540,8 @@ class Geometry(object):
# If last point in geometry is the nearest
# then reverse coordinates.
if list(pt) == list(candidate.coords[-1]):
# but prefer the first one if last == first
if pt != candidate.coords[0] and pt == candidate.coords[-1]:
candidate.coords = list(candidate.coords)[::-1]
# Straight line from current_pt to pt.
@ -2689,8 +2690,9 @@ class CNCjob(Geometry):
storage.remove(geo)
# If last point in geometry is the nearest
# but prefer the first one if last point == first point
# then reverse coordinates.
if list(pt) == list(geo.coords[-1]):
if pt != geo.coords[0] and pt == geo.coords[-1]:
geo.coords = list(geo.coords)[::-1]
# G-code