8 hinge_pin = 1.5; // xxx
13 screw_nut_across = 10; // xxx
14 knob_behind_across = 15; // xxx
26 main_r = tube_dia/2 + main_th;
28 hinge_outer_r = hinge_around + hinge_pin/2;
29 hinge_y = tube_dia/2 + hinge_outer_r;
31 screw_max_y_lhs = -main_r -screw_nut_across/2;
32 screw_max_y_rhs = -main_r -knob_behind_across/2;
34 screw_y = min(screw_max_y_lhs,
37 bot_y = screw_y -max( screw_nut_across, knob_behind_across/2 )
42 module TubePlan(){ circle(r = tube_dia/2); }
43 module HingePinPlan(){ translate([0, hinge_y]) circle(r= hinge_pin/2); }
44 module HingeBodyPlan(){ translate([0, hinge_y]) circle(r= hinge_outer_r); }
46 module TubeClampLeftPlan(){
49 polygon([[ 0, hinge_y + hinge_outer_r ],
50 [ -main_r + overlap_l, hinge_y + hinge_outer_r ],
51 [ -main_r + overlap_l, bot_y ],
52 [ -clamp_gap/2, bot_y ],
63 module TubeClampLeft() { ////toplevel
64 linextr(-clamp_width/2, clamp_width/2)