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Updated gear module to calculate the default clearance as .25/diametral_pitch (.25 * circular_pitch / PI).

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gizmoplex 2015-12-05 14:09:32 -05:00
parent f918e6d8c4
commit 68bde2d7d7
1 changed files with 5 additions and 2 deletions
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7
involute_gears.scad
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@ -297,7 +297,7 @@ module gear (
number_of_teeth=15, number_of_teeth=15,
circular_pitch=false, diametral_pitch=false, circular_pitch=false, diametral_pitch=false,
pressure_angle=28, pressure_angle=28,
clearance = 0.2, clearance = false,
gear_thickness=5, gear_thickness=5,
rim_thickness=8, rim_thickness=8,
rim_width=5, rim_width=5,
@ -317,10 +317,13 @@ module gear (
//Convert diametrial pitch to our native circular pitch //Convert diametrial pitch to our native circular pitch
circular_pitch = (circular_pitch!=false?circular_pitch:pi/diametral_pitch); circular_pitch = (circular_pitch!=false?circular_pitch:pi/diametral_pitch);
// Calculate default clearance if not specified
clearance = (clearance!=false?clearance:0.25 * circular_pitch / pi);
// Pitch diameter: Diameter of pitch circle. // Pitch diameter: Diameter of pitch circle.
pitch_diameter = number_of_teeth * circular_pitch / pi; pitch_diameter = number_of_teeth * circular_pitch / pi;
pitch_radius = pitch_diameter/2; pitch_radius = pitch_diameter/2;
echo ("Teeth:", number_of_teeth, " Pitch radius:", pitch_radius); echo (str("Teeth: ", number_of_teeth, ", Pitch Radius: ", pitch_radius, ", Clearance: ", clearance));
// Base Circle // Base Circle
base_radius = pitch_radius*cos(pressure_angle); base_radius = pitch_radius*cos(pressure_angle);