| -rw-r--r-- | another.scad | 12 | ||||
| -rw-r--r-- | pulley_data.scad | 8 |
2 files changed, 16 insertions, 4 deletions
diff --git a/another.scad b/another.scad index ed18874..51358ee 100644 --- a/another.scad +++ b/another.scad @@ -1,104 +1,108 @@ draft=true; layer_height=0.2; extrusion_width=0.4; epsilon=0.01; $fs=0.0125; use <pushfittery.scad>; include <pushfit_data.scad>; +include <pulley_data.scad>; module the_extruder( // motor properties gearbox_d = 36, mount_d = 28, // the distance between opposite mounting holes mounthole_depth = 5, mounthole_min_depth = 3, mounthole_max_depth = 4, protrusion_d = 22, protrusion_h = 2.2, // the dimensions of the protrusion on top of gearbox bore_d = 8, bore_l = 17.6, bore_dd = 7, // pulley properties - pulley_d = 11.5, pulley_h=10, + pulley = pulley_e3d, pulley_elevation = 1, // pulley elevation above the protrusion - teeth_elevation = 7.5, // distance from the bottom of the pulley to its teeth - filament_offset = (8.25-(3.0+3.5)/2) - 11.5/2 + 1.75/2, // idler properties idler_d = 9.5, idler_h = 4, idler_id = 3, // idler dimensions: outer and inner diameters and height // spring properties spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length // filament path properties filament_d = 1.75, filament_path_d = 2, filament_guide_d = 4, // PTFE filament guide diameter // knob properties knob_h = 10, knob_bore_l = 4, knob_indent_d = 4, knob_indents = 12, // spring tensioner st_nut_d = 9, st_nut_h = 4, st_screw_d = 5, st_thickshell = 8*extrusion_width, st_thinshell = 2*extrusion_width, st_split_w = 4*extrusion_width, // screw it mount_screw_d = 3.1, mount_screw_l = 20, mount_screwhead_d=6, mount_screwhead_h=3, idler_screw_d = 3, idler_screwhead_d=6, idler_screwhead_h=3, pf = pushfit_embeddest, pf_shell = max(3*layer_height,3*extrusion_width), pf_smooth = true, // empty spaces idler_travel = 3, // how far should idler travel when pressed idler_clearance=1, - pulley_d_clearance=2, pulley_small_d_clearance=0.5, lever_v_clearance=.7, // vertical clearance for the lever spring_d_clearance=1, protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion mount_screw_d_tolerance=.4, idler_v_tolerance=.5, knob_bore_d_tolerance=.6, st_nut_h_tolerance=.2, st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ st_screw_d_tolerance=.5, st_split_w_tolerance = .3, min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. min_xy_shell = 2*extrusion_width, what="lever", // lever|body|knob|springpad|* left=false, vitamins = true, bridges = true, debug = false, label = "another" ) { fnd = 2*PI; fnr = 2*fnd; + function lu(m,k) = m[search([k],m)[0]][1]; + pulley_d = lu(pulley,"d"); + pulley_h = lu(pulley,"h"); + teeth_elevation = lu(pulley,"fe"); + filament_offset = lu(pulley,"g")+filament_d/2; + pulley_d_clearance = lu(pulley,"ssrc")*2; idler_filament_offset = filament_path_d/2; // -filament_offset; lever_shell = mount_screwhead_h+0.5; lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); lsd = idler_d-idler_clearance*2; // the diameter of lever thingie longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) sqrt(c*c+pow(a-c,2)); longwing_travel = idler_travel*longwing/shortwing; h_ = (pulley_d+idler_d)/(2*sqrt(2)); ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); spring_dl = idler_travel*longwing/ri; // finger and spring support fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; ls_z = filament_elevation; // leverspace mid-z ls_h = lever_thickness+lever_v_clearance; // leverspace height mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); echo("mount depth",mount_depth); module teardrop(r,d,h,center=false,angle=45) { diff --git a/pulley_data.scad b/pulley_data.scad new file mode 100644 index 0000000..a1523de --- a/dev/null +++ b/pulley_data.scad @@ -0,0 +1,8 @@ +pulley_e3d = [ + ["d", 11.5 ], // outer diameter + ["h", 11 ], // pulley height + ["g", 8.25-3 - 11.5/2 ], // depth of U-groove, filament offset from the surface + ["fe", 7.5 ], // filament elevation from the bottom + ["ssrc", 2 ], // set screw radial clearance +]; + |