8 hinge_pin = 1.5; // xxx
13 screw_nut_across = 10; // xxx
14 knob_behind_across = 15; // xxx
27 main_r = tube_dia/2 + main_th;
29 hinge_outer_r = hinge_around + hinge_pin/2;
30 hinge_y = tube_dia/2 + hinge_outer_r;
32 screw_max_y_lhs = -main_r -screw_nut_across/2;
33 screw_max_y_rhs = -main_r -knob_behind_across/2;
35 screw_y = min(screw_max_y_lhs,
38 bot_y = screw_y -max( screw_nut_across, knob_behind_across/2 )
43 module TubePlan(){ circle(r = tube_dia/2); }
44 module HingePinPlan(){ translate([0, hinge_y]) circle(r= hinge_pin/2); }
45 module HingeBodyPlan(){ translate([0, hinge_y]) circle(r= hinge_outer_r); }
47 module TubeClampLeftPlan(){
50 polygon([[ 0, hinge_y + hinge_outer_r ],
51 [ -main_r + overlap_l, hinge_y + hinge_outer_r ],
52 [ -main_r + overlap_l, bot_y ],
53 [ -clamp_gap/2, bot_y ],
64 module TubeClampLeft() { ////toplevel
65 linextr(-clamp_width/2, clamp_width/2)
69 module TubeClampRightPlan(){
72 rectfromto([ clamp_gap/2, bot_y ],
73 [ clamp_gap/2 + behind_knob_th, 0 ]);
79 rectfromto([ clamp_gap/2, main_r*5 ],
91 linextr(-clamp_width/2, clamp_width/2)
95 module TubeClampLeft() { ////toplevel
100 module TubeClampRight() { ////toplevel
102 TubeClampRightPlan();