author | Michael Krelin <hacker@klever.net> | 2018-08-02 10:35:31 (UTC) |
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committer | Michael Krelin <hacker@klever.net> | 2018-08-02 10:35:31 (UTC) |
commit | df23f0042d72bfcc7ba1638a2209545cbfe89825 (patch) (side-by-side diff) | |
tree | 032488f7b983f5c7dfbd113a4a084d62a77695d0 | |
parent | a04582d4c163c58bd779e02e3de624ccd1f643f4 (diff) | |
download | extrudery-df23f0042d72bfcc7ba1638a2209545cbfe89825.zip extrudery-df23f0042d72bfcc7ba1638a2209545cbfe89825.tar.gz extrudery-df23f0042d72bfcc7ba1638a2209545cbfe89825.tar.bz2 |
another: work being done on spring tensioner
-rw-r--r-- | another.scad | 57 |
1 files changed, 50 insertions, 7 deletions
diff --git a/another.scad b/another.scad index 2be24e4..844dc3b 100644 --- a/another.scad +++ b/another.scad @@ -26,16 +26,20 @@ module the_extruder( 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_shell = 4*extrusion_width, // screw it mount_screw_d = 3.1, mount_screw_l = 20, mount_screwhead_d=6, mount_screwhead_h=3, pf = pushfit_embeddest, // empty spaces @@ -45,20 +49,22 @@ module the_extruder( 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, - what="lever", + what="lever", // lever|body|knob|springpad|* left=false, vitamins = true, - supports = false + supports = false, + tensioner = true, + debug = false ) { lever_shell = mount_screwhead_h+0.5; lever_thickness=max(spring_d+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); lsd = idler_d-idler_clearance*2; longwing=gearbox_d/2+spring_d/2+lsd/2; 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; @@ -192,18 +198,35 @@ module the_extruder( hh=body_h-ls_z; translate([0,0,ls_z-lever_thickness/2]) mirror([0,1,0]) cube(size=[fsw,longwing-hh+lever_thickness/sqrt(2),hh+lever_thickness/2]); hhh=ls_z; translate([0,0,0]) mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]); } } - translate([0,-longwing,ls_z]) rotate([0,-90,0]) - finger_indent(d=lever_thickness-1,r=15); + translate([0,-longwing,ls_z]) rotate([0,-90,0]) { + if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else { + if(debug) translate([0,-gearbox_d,-gearbox_d]) cube(size=[body_h/2+1,gearbox_d,gearbox_d+2]); + mirror([0,0,1]) { + translate([0,0,st_shell]) + hull() for(o=[0,spring_d]) translate([0,-o,0]) + rotate([0,0,30]) + cylinder(d=st_nut_d,h=st_nut_h,$fn=6); + translate([0,0,-1]) cylinder(d=st_screw_d,h=fsw+2,$fn=st_screw_d*PI*2); + bigd = spring_d+spring_d_clearance; + hf = (bigd-st_screw_d)/2; + translate([0,0,st_shell+st_nut_h+st_shell-epsilon]) + cylinder(d1=st_screw_d,d2=bigd, + h=hf+epsilon, $fn=bigd*PI*2 ); + translate([0,0,st_shell+st_nut_h+st_shell+hf-epsilon]) + cylinder(d=bigd,h=fsw+1,$fn=bigd*PI*2); + } + } + } } // translate // pushfit bracket translate([0,0,filament_elevation]) rotate([0,0,45]) translate([pulley_d/2,0,0]) rotate([-90,0,0]) translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/]) cylinder(r=min(body_h-filament_elevation,filament_elevation)/sin(60)-epsilon,h=pf_h(pf)+gearbox_d/2/*TODO:*/,$fn=6); @@ -255,17 +278,17 @@ module the_extruder( translate([0,0,ls_z-ls_h/2]) cube(size=[gearbox_d,gearbox_d,lever_thickness+lever_v_clearance]); translate([0,0,ls_z-ls_h/2]) { translate([mount_screwhead_d/2,0,0]) mirror([0,1,0]) cube(size=[gearbox_d,gearbox_d/2+1,lever_thickness+lever_v_clearance]); } //translate([-mount_d/2,-longwing,filament_elevation]) - translate([mount_d/2,-longwing,filament_elevation]) + if(!tensioner) translate([mount_d/2,-longwing,filament_elevation]) rotate([0,-90,0]) difference() { cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=PI*spring_d); translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=PI*spring_d); } //sphere(d=spring_d*3/4,$fn=PI*spring_d); *difference() { // spring support translate([0,-longwing,filament_elevation]) @@ -290,16 +313,31 @@ module the_extruder( for(zr=[-65:(65+50)/7:50]) rotate([0,0,zr]) translate([0,-extrusion_width/2,0]) cube(size=[gearbox_d,extrusion_width,body_h]); } } }//body module + module springpad() { + smalld=st_screw_d+extrusion_width; + bigd = spring_d+spring_d_clearance/2; + hf = (bigd-smalld)/2; + translate([-gearbox_d/2+st_shell+st_nut_h+st_shell+smalld,-longwing,filament_elevation]) + rotate([0,90,0]) difference() { + union() { + cylinder(d1=smalld,d2=bigd,h=hf,$fn=bigd*PI*2); + translate([0,0,hf-epsilon]) + cylinder(d=bigd,h=hf*2,$fn=bigd*PI*2); + } + cylinder(d=st_screw_d,h=2*hf,$fn=st_screw_d*PI*2); + } + } + module knob() { ch = knob_indent_d/2; translate([0,0,body_h+epsilon]) { mirror([0,0,1]) translate([0,0,-epsilon]) { difference() { cylinder(d=pulley_d,h=knob_bore_l,$fn=pulley_d*PI*2); translate([0,0,-1]) difference() { cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); @@ -317,21 +355,26 @@ module the_extruder( cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=PI*gearbox_d*2); } for(a=[0:360/knob_indents:359]) rotate([0,0,a]) translate([0,gearbox_d/2,-1]) cylinder(d=knob_indent_d,h=knob_h+2,$fn=knob_indent_d*PI*2); } } }//knob module - + mirrorleft() if(what=="lever") color("green",0.7) lever(); else if(what=="body") color("yellow",0.7) body(); else if(what=="knob") color("red",0.7) knob(); - else if(what=="both" || what=="*") { + else if(what=="springpad") color("blue",0.7) springpad(); + else if(what=="both") { + color("green",0.7) lever(); + color("yellow",0.7) body(); + }else{ color("green",0.7) lever(); color("yellow",0.7) body(); color("red",0.7) knob(); + color("blue",0.7) springpad(); } } the_extruder(what="both",left=false); |