////////////////////////////////////////////////////////////////////// // LibFile: linear_bearings.scad // Linear Bearing clips/holders. // To use, add these lines to the top of your file: // ``` // include // include // ``` ////////////////////////////////////////////////////////////////////// include // Section: Functions // Function: get_lmXuu_bearing_diam() // Description: Get outside diameter, in mm, of a standard lmXuu bearing. // Arguments: // size = Inner size of lmXuu bearing, in mm. function get_lmXuu_bearing_diam(size) = lookup(size, [ [ 4.0, 8.0], [ 5.0, 10.0], [ 6.0, 12.0], [ 8.0, 15.0], [ 10.0, 19.0], [ 12.0, 21.0], [ 13.0, 23.0], [ 16.0, 28.0], [ 20.0, 32.0], [ 25.0, 40.0], [ 30.0, 45.0], [ 35.0, 52.0], [ 40.0, 60.0], [ 50.0, 80.0], [ 60.0, 90.0], [ 80.0, 120.0], [100.0, 150.0] ]); // Function: get_lmXuu_bearing_length() // Description: Get length, in mm, of a standard lmXuu bearing. // Arguments: // size = Inner size of lmXuu bearing, in mm. function get_lmXuu_bearing_length(size) = lookup(size, [ [ 4.0, 12.0], [ 5.0, 15.0], [ 6.0, 19.0], [ 8.0, 24.0], [ 10.0, 29.0], [ 12.0, 30.0], [ 13.0, 32.0], [ 16.0, 37.0], [ 20.0, 42.0], [ 25.0, 59.0], [ 30.0, 64.0], [ 35.0, 70.0], [ 40.0, 80.0], [ 50.0, 100.0], [ 60.0, 110.0], [ 80.0, 140.0], [100.0, 175.0] ]); // Module: linear_bearing_housing() // Description: // Creates a model of a clamp to hold a generic linear bearing cartridge. // Arguments: // d = Diameter of linear bearing. (Default: 15) // l = Length of linear bearing. (Default: 24) // tab = Clamp tab height. (Default: 7) // tabwall = Clamp Tab thickness. (Default: 5) // wall = Wall thickness of clamp housing. (Default: 3) // gap = Gap in clamp. (Default: 5) // screwsize = Size of screw to use to tighten clamp. (Default: 3) // 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` // Example: // linear_bearing_housing(d=19, l=29, wall=2, tab=6, screwsize=2.5); module linear_bearing_housing(d=15, l=24, tab=7, gap=5, wall=3, tabwall=5, screwsize=3, anchor=BOTTOM, spin=0, orient=UP) { od = d+2*wall; ogap = gap+2*tabwall; tabh = tab/2+od/2*sqrt(2)-ogap/2; h = od+tab/2; anchors = [ anchorpt("axis", [0,0,-tab/2/2]), anchorpt("screw", [0,2-ogap/2,tabh-tab/2/2],FWD), anchorpt("nut", [0,ogap/2-2,tabh-tab/2/2],FWD) ]; attachable(anchor,spin,orient, size=[l, od, h], anchors=anchors) { down(tab/2/2) difference() { union() { // Housing zrot(90) teardrop(r=od/2,h=l); // Base cube([l,od,od/2], anchor=TOP); // Tabs cube([l,ogap,od/2+tab/2], anchor=BOTTOM); } // Clear bearing space zrot(90) teardrop(r=d/2,h=l+0.05); // Clear gap cube([l+0.05,gap,od], anchor=BOTTOM); up(tabh) { // Screwhole fwd(ogap/2-2+0.01) screw(screwsize=screwsize*1.06, screwlen=ogap, headsize=screwsize*2, headlen=10, orient=FWD); // Nut holder back(ogap/2-2+0.01) metric_nut(size=screwsize, hole=false, anchor=BOTTOM, orient=BACK); } } children(); } } // Module: lmXuu_housing() // Description: // Creates a model of a clamp to hold a standard sized lmXuu linear bearing cartridge. // Arguments: // size = Standard lmXuu inner size. // tab = Clamp tab height. Default: 7 // tabwall = Clamp Tab thickness. Default: 5 // wall = Wall thickness of clamp housing. Default: 3 // gap = Gap in clamp. Default: 5 // screwsize = Size of screw to use to tighten clamp. Default: 3 // 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` // Example: // lmXuu_housing(size=10, wall=2, tab=6, screwsize=2.5); module lmXuu_housing(size=8, tab=7, gap=5, wall=3, tabwall=5, screwsize=3, anchor=BOTTOM, spin=0, orient=UP) { d = get_lmXuu_bearing_diam(size); l = get_lmXuu_bearing_length(size); linear_bearing_housing(d=d, l=l, tab=tab, gap=gap, wall=wall, tabwall=tabwall, screwsize=screwsize, orient=orient, spin=spin, anchor=anchor) children(); } // vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap