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Revar Desmera 2023-08-03 17:14:18 -07:00
commit 20b35eb128
1 changed files with 14 additions and 3 deletions
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gears.scad
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@ -311,8 +311,19 @@ function _inherit_gear_thickness(thickness) =
// Subsection: Ring Gears (Internal Gears)
// A ring gear (or internal gear) is a gear where the teeth are on the inside of a circle. Such gears must be mated
// to a regular (external) gear, which rotates around the inside.
// Figure(3D,Med,NoAxes,VPT=[10.3822,-19.892,16.1929],VPR=[55.7,0,30.6],VPD=401.516): A interior or ring gear
// ring_gear(mod=5, teeth=35,thickness=25,$fn=128);
// Figure(2D,Med,NoAxes,VPT=[0.491171,1.07815,0.495977],VPR=[0,0,0],VPD=292.705): A interior or ring gear (yellow) with a mating spur gear (blue)
// teeth1=18;
// teeth2=30;
// ps1=undef;
// ps2=auto_profile_shift(teeth=teeth1);
// mod=3;
// d = gear_dist(mod=mod, teeth1=teeth1, teeth2=teeth2,profile_shift1=ps1, profile_shift2=ps2,helical=0, internal2=true);
// ang = 0;
// ring_gear2d(mod=mod, teeth=teeth2,profile_shift=ps2,helical=0,backing=4);
// zrot(ang*360/teeth2)
// color("lightblue")
// fwd(d)
// spur_gear2d(mod=mod, teeth=teeth1, profile_shift=ps1,gear_spin=-ang*360/teeth1,helical=0);
// Continues:
// Ring gears are subject to all the usual mesh requirements: the teeth must be the same size, the pressure angles must
// match and they must have opposite helical angles. The {{gear_dist()}} function can give the center separation of
@ -320,7 +331,7 @@ function _inherit_gear_thickness(thickness) =
// teeth is small or the teeth counts of the ring gear and spur gear are too close together. The mating spur gear must
// have few enough teeth so that the teeth don't interfere on the other side of the ring. Very small spur gears can interfere
// on the tips of the ring gear's teeth.
// Figure(2D,Med,NoAxes,VPR=[0,0,0],VPT=[-1.16111,0.0525612,0.495977],VPD=213.382): The red regions show interference between the two gears: the 18 tooth spur gear does not fit inside the 20 tooth ring gear.
// Figure(2D,Med,NoAxes,VPT=[-1.16111,0.0525612,0.495977],VPR=[0,0,0],VPD=213.382): The red regions show interference between the two gears: the 18 tooth spur gear does not fit inside the 20 tooth ring gear.
// teeth1=18;
// teeth2=20;
// ps1=undef;