| -rw-r--r-- | multimixer.scad | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/multimixer.scad b/multimixer.scad index 21f71e4..80f41f1 100644 --- a/multimixer.scad +++ b/multimixer.scad @@ -4,71 +4,75 @@ epsilon=.01; use <pushfittery.scad>; include <pushfit_data.scad>; module multimixer( filament_d = 1.75, liner_od = 4, liner_id = 2, angle = 15, // to the vertical (output) axis inputs = 4, minshell = 2*extrusion_width, shell = 5*extrusion_width, pf = pushfit_embeddest, debug = 0, // how many inputs -1 the debug cutout spans + print = false, ) { fnd = 4*PI; fnr = 2*fnd; pushfit_d = pf_d(pf); pushfit_h = pf_h(pf); angular_step = 360/inputs; inputogon_angle = 180*(inputs-2)/inputs; sinsin = sin(angle)*sin(angular_step/2); function l_to(d) = d*cos(asin(sinsin))/sinsin; l_output = liner_od; l_input = l_to(pushfit_d/2+minshell); l_fork = l_to(liner_id/2); l_narrow = l_to(liner_od/2+minshell); module forinputs() { for(zr=[0:angular_step:359]) rotate([0,0,zr]) rotate([0,angle,0]) children(); }//forinputs module module foroutput() { rotate([180,0,0]) children(); } - //translate([pf_d(pf)/2+shell,0,0]) - //translate([0,0,l_output+pushfit_h]) - module laydown(dia) { - r = dia/2; + module laydown() { + r = pushfit_d/2+shell; h_bottom = l_output+pushfit_h; /* The top point on the cylinder that will touch the bed */ x0 = r*cos(angular_step/2); y0 = r*sin(angular_step/2); z0 = l_input+pushfit_h; /* The same point after rotation by "angle" around Y axis */ x1 = z0*sin(angle)+x0*cos(angle); y1 = y0; z1 = z0*cos(angle)-x0*sin(angle); ax1 = atan(y1/x1); /* And its x-coordinate after final "angular_step/2" Z-rotation */ ax2 = ax1-angular_step/2; x2 = x1*cos(ax2)/cos(ax1); laydown_angle = atan((x2-r)/(z1+h_bottom)); rotate([90-laydown_angle,0,0]) translate([0,r,h_bottom]) rotate([0,0,angular_step/2-90]) children(); } - laydown(dia=pushfit_d+shell*2) difference() { + module finalize() { + if(print) laydown() children(); + else children(); + } + + finalize() difference() { hull() { forinputs() translate([0,0,l_input+pushfit_h]) mirror([0,0,1]) cylinder(d=pushfit_d+shell*2,h=epsilon,$fn=pushfit_d*fnd); foroutput() translate([0,0,l_output+pushfit_h]) { cylinder(d=pushfit_d+shell*2,h=epsilon,$fn=pushfit_d*fnd); } } forinputs() { translate([0,0,l_input]) pushfit(pf); translate([0,0,l_narrow]) { |