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Added ball_screw_rod(). ball_screw_bearing() not created yet.

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Revar Desmera 2019-07-29 15:53:40 -07:00
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threading.scad
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@ -844,6 +844,64 @@ module square_threaded_nut(
} }
// Section: Ball Screws
// Module: ball_screw_rod()
// Description:
// Constructs a ball screw rod. This method makes much smoother threads than the naive linear_extrude method.
// Arguments:
// d = Outer diameter of threaded rod.
// l = length of threaded rod.
// pitch = Length between threads. Also, the diameter of the ball bearings used.
// ball_diam = The diameter of the ball bearings to use with this ball screw.
// ball_arc = The arc portion that should touch the ball bearings. Default: 120 degrees.
// left_handed = if true, create left-handed threads. Default = false
// starts = The number of lead starts. Default = 1
// bevel = if true, bevel the thread ends. Default: false
// internal = If true, make this a mask for making internal threads.
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#spin). Default: `0`
// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#orient). Default: `UP`
// $slop = The printer-specific slop value to make parts fit just right.
// Example(2D): Thread Profile, ball_diam=4, ball_arc=100
// projection(cut=true) ball_screw_rod(d=10, l=15, pitch=5, ball_diam=4, ball_arc=100, orient=BACK);
// Example(2D): Thread Profile, ball_diam=4, ball_arc=120
// projection(cut=true) ball_screw_rod(d=10, l=15, pitch=5, ball_diam=4, ball_arc=120, orient=BACK);
// Example(2D): Thread Profile, ball_diam=3, ball_arc=120
// projection(cut=true) ball_screw_rod(d=10, l=15, pitch=5, ball_diam=3, ball_arc=120, orient=BACK);
// Examples(Med):
// ball_screw_rod(d=15, l=20, pitch=8, ball_diam=5, ball_arc=120, $fa=1, $fs=1);
// ball_screw_rod(d=15, l=20, pitch=5, ball_diam=4, ball_arc=120, $fa=1, $fs=1);
// ball_screw_rod(d=15, l=20, pitch=5, ball_diam=4, ball_arc=120, left_handed=true, $fa=1, $fs=1);
module ball_screw_rod(
d=10, l=100, pitch=2, starts=1,
ball_diam=5, ball_arc=100,
left_handed=false,
internal=false,
bevel=false,
anchor=CENTER,
spin=0,
orient=UP
) {
depth = ball_diam * (1-cos(ball_arc/2))/2;
profile = arc(N=11, d=ball_diam/pitch, cp=[0,ball_diam/2/pitch*cos(ball_arc/2)], start=270-ball_arc/2, angle=ball_arc);
trapezoidal_threaded_rod(
d=d, l=l, pitch=pitch,
thread_depth=depth,
thread_angle=90-ball_arc/2,
profile=profile,
left_handed=left_handed,
starts=starts,
bevel=bevel,
internal=internal,
anchor=anchor,
spin=spin,
orient=orient
) children();
}
// Section: PCO-1881 Bottle Threading // Section: PCO-1881 Bottle Threading