| -rw-r--r-- | another.scad | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/another.scad b/another.scad index f54c5cd..b80d0d0 100644 --- a/another.scad +++ b/another.scad @@ -261,140 +261,149 @@ module the_extruder( }//translate }//hull }else{ pfb2a = pf_d(pf)+2*pf_shell; pfba = pfb2a/2; pfbd = pfb2a/cos(30); pfbs = pfb2a*tan(30); cylinder(d=pfbd,h=pfbl,$fn=6); translate([-pfbs/2,0,0]) { hull() { translate([0,-pfba,0]) cube(size=[pfbs,pfb2a,pfbl]); cube(size=[pfbs,filament_elevation,pfbl-filament_elevation+pfba]); mirror([0,1,0]) cube(size=[pfbs,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfba]); }//hull }//translate*/ }//if(pf_smooth) }//translate rotate translate rotate translate }//union (first child of difference) // protrusion translate([0,0,-1]) cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h)); // mount screw holes for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) { translate([0,0,mount_screw_l-mounthole_depth/2-(bridges?layer_height:-epsilon)]) mirror([0,0,1]) cylinder(d=mount_screw_d+mount_screw_d_tolerance, h=mount_screw_l-mounthole_depth/2+1, $fn=fnd*(mount_screw_d+mount_screw_d_tolerance)); translate([0,0,mount_screw_l-mounthole_depth/2]) cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d); }//for // pushfit 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+epsilon]) rotate([0,0,180]) { pushfit(pf); cylinder(d=filament_guide_d,h=gearbox_d,center=true,$fn=fnd*filament_guide_d); translate([0,-filament_guide_d/2/sqrt(2),0]) rotate([0,0,45]) cube(size=[filament_guide_d/2,filament_guide_d/2,gearbox_d],center=true); }//rotate translate rotate translate rotate translate // pulley cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_clearance)); // leverspace hull() for(x=[0,gearbox_d]) rotate([0,0,45]) translate([x,0,ls_z-ls_h/2]) cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); // idler clearance a=cos(45)*(pulley_d+idler_d)/2; b=mount_d/2-a; x=sqrt(pow(a,2)+pow(b,2)); translate([mount_d/2,0,ls_z]) intersection() { r = x+idler_d/2+idler_clearance; cylinder(r=r,h=ls_h,center=true); translate([-r-1,0,-ls_h/2-1]) cube(size=[2*r+2,r+1,ls_h+2]); } // back side cutout - a0 = asin((mount_screwhead_d+2*extrusion_width)/mount_d); + // XXX: this is somewhat ugly and potentially bugged, + // but I want to sleep. + a0_ = atan( + (mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2) + / + ( + pulley_d/2- + (pf_d(pf)+2*pf_shell)/2/cos(30) + ) + ); + a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ ); a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2)); - translate([0,0,ls_z]) hull() { + translate([0,0,ls_z]) difference() { rotate([0,0,-180+a0]) rotate_extrude(angle=a1-a0) translate([0,-ls_h/2]) square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1, - ls_h]); - cylinder(d=bore_d/2/*TODO:recalculate angles based on this, - too lazy to do that now*/, - h=ls_h,center=true); - } + ls_h]); + translate([-mount_d/2,0,0]) + cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d)); + }//difference translate rotate([0,0,-45]) 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]) if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */ translate([mount_d/2,-longwing,filament_elevation]) rotate([0,-90,0]) difference() { cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance)); translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); } }//difference if(supports) intersection() { difference() { translate([0,0,ls_z-ls_h/2-epsilon]) cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d); cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_clearance)); } // supports // TODO: hardcoded stuff below… if(false) { // parallel for(y=[-gearbox_d:4:gearbox_d]) translate([0,y-extrusion_width/2,0]) cube(size=[gearbox_d,extrusion_width,body_h]); }else{ // radial 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+st_screw_d_tolerance+2*extrusion_width; bigd = spring_d+spring_d_clearance/2; hf = (bigd-smalld)/2; translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) rotate([0,90,0]) difference() { union() { cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); translate([0,0,hf-epsilon]) cylinder(d=bigd,h=hf*2,$fn=fnd*bigd); translate([0,0,3*hf]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); } translate([0,0,-epsilon]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); } } 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=fnd*pulley_d); |