| -rw-r--r-- | x-carriage-adapter.scad | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/x-carriage-adapter.scad b/x-carriage-adapter.scad new file mode 100644 index 0000000..af91d52 --- a/dev/null +++ b/x-carriage-adapter.scad @@ -0,0 +1,145 @@ +screw_tolerance=0.1; slide_tolerance=.3; play_tolerance=.8; +draft=true; +use <e3dchimera.scad>; + +assembly_height = 49.5; // the height of e3d chimera assembly in e3dchimera.scad +hs_nozzles_from_back = 6; // the distance from nozzles from the back of the heatsink +hs_size = [30,18,30]; // the heatsink size +mounting_holes_from_top = [ // the offsets of mounting holes on the back + [0, 20], [-4.5,10], [4.5,10] +]; +mounting_holes_on_top = [ // the offsets of mounting holes on the top + [0,-3], [-17/2,9], [17/2,9] +]; +feeds_apart = 18; // the distance between nozzles (and, therefore filament feeds) + +feed_shell_d = 17; // the shell diameter around filament feed, pushfit's diameter +screw_shell_d = 8; // the shell diameter around screws +thread_h = 10.5; // the height of the pushfit's thread +hinge_s = 6; // hinges thickness + +screwhead_d = 5.5; // the diameter of the screw head +screwhead_h = 3; // the height of the screw head + +ms_size = [19.8,6,10]; // microswitch dimensions +ms_screws_apart = 9.5; // distance between microswitch mounting screws +ms_switch_offset = 2.5; // the offset of the switch from the center +ms_bump = ms_size[1]; // how far from hinge microswitch is mounted + +lower_by = 15; // lower hotend from the original intention by this long +gap = 5; // gap between microswitch and heatsink + +ps_offset = 3+3; // pushscrew offset from the hinge + +back_thickness = 8; // thickness of the part behind the hinge +nut_thickness = 2.5; // intelligent guess should suffice +nut_width = 5.5; // intelligent guess should suffice + +use <threads.scad>; +/* the internal thread for e3d bowden coupling: http://e3d-online.com/E3D-v6/Spares/Threaded-Bowden-Coupling-1.75mm-Filament */ +module pushfit_thread(h=thread_h) { + thr = 3/8 + .5/25.4; + slit = 25.4*thr/2 + 0.4; + translate([0,0,-1]) if(draft) cylinder(d=thr*25.4,h=h+2); + else english_thread(diameter=thr,threads_per_inch=28,length=(h+2)/25.4,internal=true); + translate([-2,-slit,-1]) cube([4,slit,h+2]); +} + + +sff = hs_nozzles_from_back+gap; // switch from feeds +hff = sff+ms_size[1]+ms_bump+thread_h/2; // hinges from feeds + +module holder() { + translate([0,0,0]) difference() { + union() { + hull() { + rs = 3; drs = screw_shell_d/2-rs; + rf = 6; drf = feed_shell_d/2-rf; + for(sx=[-1,1]) translate([sx*feeds_apart/2,0,0]) { + translate([0,0,drf]) + cylinder(d=feed_shell_d,h=thread_h-drf,$fn=60); + cylinder(r=rf,h=thread_h,$fn=30); + } + for(mhot = mounting_holes_on_top) translate([mhot[0],mhot[1],0]) { + translate([0,0,drs]) + cylinder(d=screw_shell_d,h=thread_h-drs,$fn=30); + cylinder(r=rs,h=thread_h,$fn=30); + } + } + hull() { + translate([0,0,thread_h/2]) cube(size=[hs_size[0]-2*hinge_s-2*slide_tolerance,feed_shell_d,thread_h],center=true); + translate([0,-hff,thread_h/2]) + rotate([0,90,0]) + cylinder(d=thread_h,h=hs_size[0]-2*hinge_s-2*slide_tolerance,center=true,$fn=60); + } + }//union + for(sx=[-1,1]) translate([sx*feeds_apart/2,0,0]) + pushfit_thread(); + for(mhot = mounting_holes_on_top) translate([mhot[0],mhot[1],0]) { + translate([0,0,-1]) cylinder(d=3,h=thread_h+2,$fn=12); // TODO: sink heads + translate([0,0,thread_h/2]) cylinder(d=screwhead_d+slide_tolerance,h=thread_h/2+1,$fn=30); + } + // hinge + translate([0,-hff,thread_h/2]) + rotate([0,90,0]) cylinder(d=3+slide_tolerance,h=hs_size[0],center=true,$fn=12); + // push screw + hull() for(oy=[-1,1]) translate([0,-hff+ps_offset+oy,-1]) cylinder(d=3+play_tolerance,h=thread_h+2,$fn=30); + // tune screw + translate([0,-sff-ms_size[1]/2,-1]) cylinder(d=3,h=thread_h+2); + }//difference +} + + +module base() { + us = 2*ms_size[2]; + translate([0,-hff,0]) difference() { + union() { + for(sx=[-1,1]) translate([sx*(hs_size[0]-hinge_s)/2,0,0]) hull() { + translate([0,0,thread_h/2]) + rotate([0,90,0]) cylinder(d=thread_h,h=hinge_s,center=true,$fn=60); + cube(size=[hinge_s,thread_h,thread_h],center=true); + translate([-hinge_s/2,0,-1]) mirror([0,1,0]) cube(size=[hinge_s,thread_h/2+back_thickness,thread_h+1]); + } // hull for + hull() { + translate([0,0,-us/2-slide_tolerance]) cube(size=[hs_size[0],thread_h+1,us],center=true); + for(sx=[-1,1]) translate([sx*(hs_size[0]/2-ms_bump),thread_h/2,-us-slide_tolerance]) + cylinder(r=ms_bump,h=us+slide_tolerance,$fn=30); + } + translate([-hs_size[0]/2,-thread_h/2-slide_tolerance,-us-slide_tolerance]) + mirror([0,1,0]) cube(size=[hs_size[0],back_thickness,us+slide_tolerance+thread_h]); + } // union + translate([0,0,thread_h/2]) + rotate([0,90,0]) cylinder(d=3+screw_tolerance,h=hs_size[0]+2,center=true,$fn=12); + for(smx=[0,1]) mirror([smx,0,0]) + translate([hs_size[0]/2+1,0,thread_h/2]) rotate([0,-90,0]) cylinder(d=screwhead_d+slide_tolerance,h=screwhead_h+1,$fn=30); + /* changed my mind; for(srx=[-1,1]) rotate([srx*15,0,0]) + translate([0,0,thread_h/2-slide_tolerance]) + cube(size=[hs_size[0]-2*hinge_s,thread_h*sqrt(2)+2,thread_h],center=true); */ + // switch mount + for(sx=[-1,1]) translate([sx*ms_screws_apart/2+ms_switch_offset,thread_h/2,-ms_size[2]]) + rotate([90,0,0]) + cylinder(d=2.5,h=ms_size[1]*2,center=true,$fn=12); + // thing mount + translate([0,-thread_h/2-back_thickness,lower_by]) + for(mhft = mounting_holes_from_top) translate([mhft[0],0,-mhft[1]]) { + rotate([-90,0,0]) + translate([0,0,-1]) + cylinder(d=3,h=back_thickness+1); + translate([0,back_thickness/2,0]) + cube(size=[2*hs_size[0],nut_thickness+slide_tolerance,nut_width+slide_tolerance],center=true); + } // translate for + mirror([0,0,1]) translate([0,ps_offset,-1]) cylinder(d=3,h=hs_size[2]+1); + } // difference +} + +view="*"; + +if(view=="holder") { + holder(); +}else if(view=="base") { + base(); +}else { + % translate([0,0,-assembly_height]) chimera_assembly(); + color("lightgreen",0.7) holder(); + color("darkgreen",0.7) base(); +} |