mirror of
https://github.com/BelfrySCAD/BOSL2.git
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183 lines
6.9 KiB
OpenSCAD
183 lines
6.9 KiB
OpenSCAD
//////////////////////////////////////////////////////////////////////
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// LibFile: linear_bearings.scad
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// Mounts and models for LMxUU style linear bearings.
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// Includes:
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// include <BOSL2/std.scad>
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// include <BOSL2/linear_bearings.scad>
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// FileGroup: Parts
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// FileSummary: Mounts for LMxUU style linear bearings.
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//////////////////////////////////////////////////////////////////////
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include <metric_screws.scad>
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// Section: Generic Linear Bearings
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// Module: linear_bearing_housing()
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// Description:
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// Creates a model of a clamp to hold a generic linear bearing cartridge.
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// Arguments:
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// d = Diameter of linear bearing. (Default: 15)
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// l = Length of linear bearing. (Default: 24)
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// tab = Clamp tab height. (Default: 7)
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// tabwall = Clamp Tab thickness. (Default: 5)
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// wall = Wall thickness of clamp housing. (Default: 3)
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// gap = Gap in clamp. (Default: 5)
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// screwsize = Size of screw to use to tighten clamp. (Default: 3)
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
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// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
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// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
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// Example:
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// linear_bearing_housing(d=19, l=29, wall=2, tab=6, screwsize=2.5);
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module linear_bearing_housing(d=15, l=24, tab=7, gap=5, wall=3, tabwall=5, screwsize=3, anchor=BOTTOM, spin=0, orient=UP)
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{
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od = d+2*wall;
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ogap = gap+2*tabwall;
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tabh = tab/2+od/2*sqrt(2)-ogap/2;
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h = od+tab/2;
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anchors = [
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named_anchor("axis", [0,0,-tab/2/2]),
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named_anchor("screw", [0,2-ogap/2,tabh-tab/2/2],FWD),
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named_anchor("nut", [0,ogap/2-2,tabh-tab/2/2],FWD)
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];
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attachable(anchor,spin,orient, size=[l, od, h], anchors=anchors) {
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down(tab/2/2)
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difference() {
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union() {
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// Housing
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zrot(90) teardrop(r=od/2,h=l);
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// Base
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cube([l,od,od/2], anchor=TOP);
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// Tabs
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cube([l,ogap,od/2+tab/2], anchor=BOTTOM);
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}
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// Clear bearing space
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zrot(90) teardrop(r=d/2,h=l+0.05);
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// Clear gap
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cube([l+0.05,gap,od], anchor=BOTTOM);
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up(tabh) {
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// Screwhole
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fwd(ogap/2-2+0.01) generic_screw(screwsize=screwsize*1.06, screwlen=ogap, headsize=screwsize*2, headlen=10, orient=FWD);
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// Nut holder
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back(ogap/2-2+0.01) metric_nut(size=screwsize, hole=false, anchor=BOTTOM, orient=BACK);
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}
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}
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children();
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}
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}
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// Module: linear_bearing()
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// Description:
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// Creates a rough model of a generic linear ball bearing cartridge.
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// Arguments:
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// l/length = The length of the linear bearing cartridge.
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// od = The outer diameter of the linear bearing cartridge.
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// id = The inner diameter of the linear bearing cartridge.
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
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// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
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// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
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// Example:
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// linear_bearing(l=24, od=15, id=8);
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module linear_bearing(l, od=15, id=8, length, anchor=CTR, spin=0, orient=UP) {
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l = first_defined([l, length, 24]);
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attachable(anchor,spin,orient, d=od, l=l) {
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color("silver") {
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tube(id=id, od=od, l=l-1);
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tube(id=od-1, od=od, l=l);
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tube(id=id, od=id+1, l=l);
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tube(id=id+2, od=od-2, l=l);
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}
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children();
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}
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}
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// Section: lmXuu Linear Bearings
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// Module: lmXuu_housing()
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// Description:
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// Creates a model of a clamp to hold a standard sized lmXuu linear bearing cartridge.
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// Arguments:
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// size = Standard lmXuu inner size.
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// tab = Clamp tab height. Default: 7
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// tabwall = Clamp Tab thickness. Default: 5
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// wall = Wall thickness of clamp housing. Default: 3
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// gap = Gap in clamp. Default: 5
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// screwsize = Size of screw to use to tighten clamp. Default: 3
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
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// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
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// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
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// Example:
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// lmXuu_housing(size=10, wall=2, tab=6, screwsize=2.5);
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module lmXuu_housing(size=8, tab=7, gap=5, wall=3, tabwall=5, screwsize=3, anchor=BOTTOM, spin=0, orient=UP)
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{
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info = lmXuu_info(size);
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d = info[0];
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l = info[1];
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linear_bearing_housing(d=d, l=l, tab=tab, gap=gap, wall=wall, tabwall=tabwall, screwsize=screwsize, orient=orient, spin=spin, anchor=anchor) children();
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}
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// Module: lmXuu_bearing()
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// Description:
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// Creates a model of an lmXuu linear ball bearing cartridge.
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// Arguments:
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// size = Standard lmXuu inner size.
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
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// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
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// orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP`
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// Example:
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// lmXuu_bearing(size=10);
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module lmXuu_bearing(size=8, anchor=CTR, spin=0, orient=UP) {
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info = lmXuu_info(size);
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linear_bearing(l=info[1], id=size, od=info[0], anchor=anchor, spin=spin, orient=orient) children();
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}
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// Section: lmXuu Linear Bearing Info
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// Function: lmXuu_info()
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// Description:
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// Get dimensional info for a standard metric lmXuu linear bearing cartridge.
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// Returns `[DIAM, LENGTH]` for the cylindrical cartridge.
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// Arguments:
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// size = Inner diameter of lmXuu bearing, in mm.
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function lmXuu_info(size) =
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let(
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data = [
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// size, diam, length
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[ 4, 8, 12],
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[ 5, 10, 15],
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[ 6, 12, 19],
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[ 8, 15, 24],
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[ 10, 19, 29],
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[ 12, 21, 30],
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[ 13, 23, 32],
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[ 16, 28, 37],
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[ 20, 32, 42],
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[ 25, 40, 59],
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[ 30, 45, 64],
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[ 35, 52, 70],
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[ 40, 60, 80],
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[ 50, 80, 100],
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[ 60, 90, 110],
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[ 80, 120, 140],
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[100, 150, 175],
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],
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found = search([size], data, 1)[0]
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)
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assert(found!=[], str("Unsupported lmXuu linear bearing size: ", size))
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select(data[found], 1, -1);
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// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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