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CAM: add spiral-out to full radius at the bottom of the cone helix

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David Kaufman
2025-05-07 11:15:15 -04:00
parent 7629312717
commit fad13fb300
1 changed files with 34 additions and 25 deletions
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59
src/Mod/CAM/Path/Op/Adaptive.py
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@@ -179,19 +179,24 @@ def GenerateGCode(op, obj, adaptiveResults, helixDiameter):
# Helix ramp
if helixRadius > 0.01:
r = helixRadius - 0.01
maxfi = passDepth / depthPerOneCircle * 2 * math.pi
fi = 0
offsetFi = -maxfi + startAngle - math.pi / 16
helixStart = [
region["HelixCenterPoint"][0] + r * math.cos(offsetFi),
region["HelixCenterPoint"][1] + r * math.sin(offsetFi),
]
op.commandlist.append(Path.Command("(Helix to depth: %f)" % passEndDepth))
if obj.UseHelixArcs is False:
helix_down_angle = passDepth / depthPerOneCircle * 2 * math.pi
r_bottom = r - (passStartDepth - passEndDepth) * math.tan(math.radians(obj.HelixConeAngle.Value))
r_bottom = max(r_bottom, r * .5) # put a limit on how small the cone tip can be
step_over = obj.StepOver * 0.01 * op.tool.Diameter.Value
spiral_out_angle = (r - r_bottom) / step_over * 2 * math.pi
angle0 = startAngle - helix_down_angle - spiral_out_angle
angle = 0
helixStart = [
region["HelixCenterPoint"][0] + r * math.cos(angle0),
region["HelixCenterPoint"][1] + r * math.sin(angle0),
]
# rapid move to start point
op.commandlist.append(Path.Command("G0", {"Z": obj.ClearanceHeight.Value}))
op.commandlist.append(
@@ -230,29 +235,33 @@ def GenerateGCode(op, obj, adaptiveResults, helixDiameter):
)
)
r_bottom = r - (passStartDepth - passEndDepth) * math.tan(math.radians(obj.HelixConeAngle.Value))
r_bottom = max(r_bottom, r * .75) # put a limit on how small the cone tip can be
while fi < maxfi:
r_current = r * (1 - fi/maxfi) + r_bottom * (fi/maxfi)
x = region["HelixCenterPoint"][0] + r_current * math.cos(fi + offsetFi)
y = region["HelixCenterPoint"][1] + r_current * math.sin(fi + offsetFi)
z = passStartDepth - fi / maxfi * (passStartDepth - passEndDepth)
# helix down
while angle < helix_down_angle:
progress = angle / helix_down_angle
r_current = r * (1 - progress) + r_bottom * progress
x = region["HelixCenterPoint"][0] + r_current * math.cos(angle + angle0)
y = region["HelixCenterPoint"][1] + r_current * math.sin(angle + angle0)
z = passStartDepth - progress * (passStartDepth - passEndDepth)
op.commandlist.append(
Path.Command("G1", {"X": x, "Y": y, "Z": z, "F": op.vertFeed})
)
fi = fi + math.pi / 16
angle = min(angle + math.pi / 16, helix_down_angle)
# one more circle at target depth to make sure center is cleared
maxfi = maxfi + 2 * math.pi
while fi < maxfi:
x = region["HelixCenterPoint"][0] + r_bottom * math.cos(fi + offsetFi)
y = region["HelixCenterPoint"][1] + r_bottom * math.sin(fi + offsetFi)
# spiral out, plus a full extra circle
max_angle = helix_down_angle + spiral_out_angle + 2 * math.pi
while angle < max_angle:
if spiral_out_angle == 0:
progress = 1
else:
progress = min(1, (angle - helix_down_angle) / spiral_out_angle)
r_current = r_bottom * (1 - progress) + r * progress
x = region["HelixCenterPoint"][0] + r_current * math.cos(angle + angle0)
y = region["HelixCenterPoint"][1] + r_current * math.sin(angle + angle0)
z = passEndDepth
op.commandlist.append(
Path.Command("G1", {"X": x, "Y": y, "Z": z, "F": op.horizFeed})
)
fi = fi + math.pi / 16
angle = min(angle + math.pi / 16, max_angle)
else:
# Use arcs for helix - no conical shape support
helixStart = [