////////////////////////////////////////////////////////////////////// // LibFile: sliders.scad // Simple V-groove based sliders and rails. // Includes: // include // include // FileGroup: Parts // FileSummary: Simple sliders and rails. ////////////////////////////////////////////////////////////////////// // Section: Modules // Module: slider() // Synopsis: Creates a V-groove slider. // SynTags: Geom // Topics: Parts, Sliders // See Also: rail() // Usage: // slider(l, w, h, [base=], [wall=], [ang=], [$slop=]) [ATTACHMENTS]; // Description: // Creates a slider to match a V-groove rail. // Arguments: // l = Length (long axis) of slider. // w = Width of slider. // h = Height of slider. // --- // base = Height of slider base. // wall = Width of wall behind each side of the slider. // ang = Overhang angle for slider, to facilitate supportless printig. // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER` // spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0` // orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP` // $slop = The printer-specific slop value to make parts fit just right. // Example: // slider(l=30, base=10, wall=4, $slop=0.2, spin=90); function slider(l=30, w=10, h=10, base=10, wall=5, ang=30, anchor=BOTTOM, spin=0, orient=UP) = no_function("slider"); module slider(l=30, w=10, h=10, base=10, wall=5, ang=30, anchor=BOTTOM, spin=0, orient=UP) { full_width = w + 2*wall; full_height = h + base; attachable(anchor,spin,orient, size=[full_width, l, h+2*base]) { zrot(90) down(base+h/2) { // Base cuboid([full_width, l, base-get_slop()], chamfer=2, edges=[FRONT,BACK], except_edges=BOT, anchor=BOTTOM); // Wall xflip_copy(offset=w/2+get_slop()) { cuboid([wall, l, full_height], chamfer=2, edges=RIGHT, except_edges=BOT, anchor=BOTTOM+LEFT); } // Sliders up(base+h/2) { xflip_copy(offset=w/2+get_slop()+0.02) { bev_h = h/2*tan(ang); prismoid([h, l], [0, l-w], h=bev_h+0.01, orient=LEFT, anchor=BOT); } } } children(); } } // Module: rail() // Synopsis: Creates a V-groove rail. // SynTags: Geom // Topics: Parts, Sliders // See Also: slider() // Usage: // rail(l, w, h, [chamfer=], [ang=]) [ATTACHMENTS]; // Description: // Creates a V-groove rail. // Arguments: // l = Length (long axis) of slider. // w = Width of slider. // h = Height of slider. // chamfer = Size of chamfer at end of rail. // ang = Overhang angle for slider, to facilitate supportless printing. // --- // anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `BOTTOM` // spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0` // orient = Vector to rotate top towards, after spin. See [orient](attachments.scad#subsection-orient). Default: `UP` // Example: // rail(l=100, w=10, h=10); function rail(l=30, w=10, h=10, chamfer=1.0, ang=30, anchor=BOTTOM, spin=0, orient=UP) = no_function("rail"); module rail(l=30, w=10, h=10, chamfer=1.0, ang=30, anchor=BOTTOM, spin=0, orient=UP) { attack_ang = 30; attack_len = 2; fudge = 1.177; chamf = sqrt(2) * chamfer; cosa = cos(ang*fudge); sina = sin(ang*fudge); z1 = h/2; z2 = z1 - chamf * cosa; z3 = z1 - attack_len * sin(attack_ang); z4 = 0; x1 = w/2; x2 = x1 - chamf * sina; x3 = x1 - chamf; x4 = x1 - attack_len * sin(attack_ang); x5 = x2 - attack_len * sin(attack_ang); x6 = x1 - z1 * sina; x7 = x4 - z1 * sina; y1 = l/2; y2 = y1 - attack_len * cos(attack_ang); attachable(anchor,spin,orient, size=[w, l, h]) { polyhedron( convexity=4, points=[ [-x5, -y1, z3], [ x5, -y1, z3], [ x7, -y1, z4], [ x4, -y1, -z1-0.05], [-x4, -y1, -z1-0.05], [-x7, -y1, z4], [-x3, -y2, z1], [ x3, -y2, z1], [ x2, -y2, z2], [ x6, -y2, z4], [ x1, -y2, -z1-0.05], [-x1, -y2, -z1-0.05], [-x6, -y2, z4], [-x2, -y2, z2], [ x5, y1, z3], [-x5, y1, z3], [-x7, y1, z4], [-x4, y1, -z1-0.05], [ x4, y1, -z1-0.05], [ x7, y1, z4], [ x3, y2, z1], [-x3, y2, z1], [-x2, y2, z2], [-x6, y2, z4], [-x1, y2, -z1-0.05], [ x1, y2, -z1-0.05], [ x6, y2, z4], [ x2, y2, z2], ], faces=[ [0, 1, 2], [0, 2, 5], [2, 3, 4], [2, 4, 5], [0, 13, 6], [0, 6, 7], [0, 7, 1], [1, 7, 8], [1, 8, 9], [1, 9, 2], [2, 9, 10], [2, 10, 3], [3, 10, 11], [3, 11, 4], [4, 11, 12], [4, 12, 5], [5, 12, 13], [5, 13, 0], [14, 15, 16], [14, 16, 19], [16, 17, 18], [16, 18, 19], [14, 27, 20], [14, 20, 21], [14, 21, 15], [15, 21, 22], [15, 22, 23], [15, 23, 16], [16, 23, 24], [16, 24, 17], [17, 24, 25], [17, 25, 18], [18, 25, 26], [18, 26, 19], [19, 26, 27], [19, 27, 14], [6, 21, 20], [6, 20, 7], [7, 20, 27], [7, 27, 8], [8, 27, 26], [8, 26, 9], [9, 26, 25], [9, 25, 10], [10, 25, 24], [10, 24, 11], [11, 24, 23], [11, 23, 12], [12, 23, 22], [12, 22, 13], [13, 22, 21], [13, 21, 6], ] ); children(); } } // vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap