Updated gear module to calculate the default clearance as .25/diametral_pitch (.25 * circular_pitch / PI).
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@ -297,7 +297,7 @@ module gear (
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number_of_teeth=15,
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circular_pitch=false, diametral_pitch=false,
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pressure_angle=28,
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clearance = 0.2,
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clearance = false,
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gear_thickness=5,
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rim_thickness=8,
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rim_width=5,
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@ -317,10 +317,13 @@ module gear (
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//Convert diametrial pitch to our native circular pitch
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circular_pitch = (circular_pitch!=false?circular_pitch:pi/diametral_pitch);
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// Calculate default clearance if not specified
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clearance = (clearance!=false?clearance:0.25 * circular_pitch / pi);
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// Pitch diameter: Diameter of pitch circle.
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pitch_diameter = number_of_teeth * circular_pitch / pi;
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pitch_radius = pitch_diameter/2;
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echo ("Teeth:", number_of_teeth, " Pitch radius:", pitch_radius);
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echo (str("Teeth: ", number_of_teeth, ", Pitch Radius: ", pitch_radius, ", Clearance: ", clearance));
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// Base Circle
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base_radius = pitch_radius*cos(pressure_angle);
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