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small doc fixes

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Adrian Mariano 2023-10-08 22:03:37 -04:00
parent e8d1fbb1fe
commit fd2441e679
1 changed files with 9 additions and 6 deletions
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gears.scad
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@ -539,11 +539,13 @@ function _inherit_gear_thickness(thickness) =
// It is most common to design bevel gears so operate with their shafts at 90 degree angles, but // It is most common to design bevel gears so operate with their shafts at 90 degree angles, but
// this is not required, and you can design pairs of bevel gears for any desired shaft angle. // this is not required, and you can design pairs of bevel gears for any desired shaft angle.
// Note, however, that given a pair of teeth counts, a bevel gear pair is not possible at all angles. // Note, however, that given a pair of teeth counts, a bevel gear pair is not possible at all angles.
// Figure(3D,Med,VPT=[-40.9281,-1.23739,2.11767],VPR=[68.3,0,119.8],VPD=54.2389,NoAxes): Two zerol bevel gears mated with shafts at 90 degrees. // Figure(3D,Med,NoAxes,VPT=[-1.42254,-1.98925,13.5702],VPR=[76,0,145],VPD=263.435): Two zerol bevel gears mated with shafts at 90 degrees.
// bevel_gear(mod=3,teeth=35,face_width=10,spiral_angle=0,mate_teeth=15); // bevel_gear(mod=3,teeth=35,face_width=10,spiral_angle=0,mate_teeth=15);
// cyl(h=40,d=3,$fn=16,anchor=BOT);
// color("lightblue")left(pitch_radius(mod=3,teeth=35))up(pitch_radius(mod=3,teeth=15)) // color("lightblue")left(pitch_radius(mod=3,teeth=35))up(pitch_radius(mod=3,teeth=15))
// yrot(90)zrot(360/15/2)bevel_gear(mod=3,teeth=15,face_width=10,spiral_angle=0,cutter_radius=-30,mate_teeth=35); // yrot(90){zrot(360/15/2)bevel_gear(mod=3,teeth=15,face_width=10,spiral_angle=0,cutter_radius=-30,mate_teeth=35);
// Figure(3D,Med,VPT=[1.55215,1.94725,16.4524],VPR=[76,0,181.4],VPD=263.435): Two zerol bevel gears mated with shafts at a 35 deg angle. // cyl(h=60,d=3,$fn=16,anchor=BOT);}
// Figure(3D,Med,NoAxes,VPT=[1.55215,1.94725,16.4524],VPR=[76,0,181.4],VPD=263.435): Two zerol bevel gears mated with shafts at a 35 deg angle. Note that if the blue gear is tipped slightly more its shaft will intersect the shaft of the yellow gear underneath that gear; that indicates an impossible angle for this pair of teeth counts.
// function bevel_angles(z1,z2,shaft) = // function bevel_angles(z1,z2,shaft) =
// [atan(sin(shaft)/((z2/z1)+cos(shaft))), // [atan(sin(shaft)/((z2/z1)+cos(shaft))),
// atan(sin(shaft)/((z1/z2)+cos(shaft)))]; // atan(sin(shaft)/((z1/z2)+cos(shaft)))];
@ -557,16 +559,17 @@ function _inherit_gear_thickness(thickness) =
// cyl(h=60,d=3,$fn=16,anchor=BOT); // cyl(h=60,d=3,$fn=16,anchor=BOT);
// } // }
// Continues: // Continues:
// In the above figure you can see a gear that is very flat. A bevel gear like this is called a planar gear or // In the above figure you can see a gear that is very flat. A bevel gear that is perfectly flat is called a planar bevel gear or
// sometimes also a crown gear. The latter term may be confusing because it also refers to a similar looking // sometimes also a crown gear. The latter term may be confusing because it also refers to a similar looking
// but very different type of gear that is described below. A planar bevel gear can only mate with another // but very different type of gear that is described below. A planar bevel gear can only mate with another
// compatible bevel gear, and never at a 90 degree angle. // compatible bevel gear. It has a degenerate cone with its apex on the gear itself, so the mating pinion gear cannot
// mate at a 90 degree angle because if it did, it's cone could not meet the center of the planar bevel gear.
// Subsection: Crown Gears (Face Gears) // Subsection: Crown Gears (Face Gears)
// Crown gears, sometimes called Face Crown Gears or just Face Gears, are gears with teeth pointing straight up so // Crown gears, sometimes called Face Crown Gears or just Face Gears, are gears with teeth pointing straight up so
// the gear resembles a crown. This type of gear is not the same as a bevel gear with vertical teeth, which would mate // the gear resembles a crown. This type of gear is not the same as a bevel gear with vertical teeth, which would mate
// to another bevel gear. A crown gear mates to a spur gear at a ninety degree angle. A feature of the crown gear assembly // to another bevel gear. A crown gear mates to a spur gear at a ninety degree angle. A feature of the crown gear assembly
// is that the spur gear can shift along its axis without affecting the mesh. // is that the spur gear can shift along its axis without affecting the mesh.
// Figure(2D,Med,VPT=[-2.19006,-1.67419,-4.49379],VPR=[67.6,0,131.9],VPD=113.4): A Crown or Face gear with its mating spur gear in blue. // Figure(2D,Med,NoAxes,VPT=[-2.19006,-1.67419,-4.49379],VPR=[67.6,0,131.9],VPD=113.4): A Crown or Face gear with its mating spur gear in blue.
// crown_gear(mod=1, teeth=32, backing=3, face_width=7); // crown_gear(mod=1, teeth=32, backing=3, face_width=7);
// color("lightblue") // color("lightblue")
// back(pitch_radius(mod=1,teeth=32)+7/2) // back(pitch_radius(mod=1,teeth=32)+7/2)