6 hinge_pin = 1.5; // xxx
11 screw_nut_across = 10; // xxx
12 knob_behind_across = 15; // xxx
24 main_r = tube_dia/2 + main_th;
26 hinge_outer_r = hinge_around + hinge_pin/2
27 hinge_y = tube_dia/2 + hinge_outer_r;
29 screw_max_y_lhs = -main_r -screw_nut_across/2;
30 screw_max_y_rhs = -main_r -knob_behind_across/2;
32 screw_y = min(screw_max_y_lhs,
35 bot_y = -screw_y -max( screw_nut_across, knob_behind_across/2 )
39 module TubePlan(){ circle(r = tube_dia/2); }
40 module HingePlan(){ translate([0, hinge_y]) circle(r= hinge_pin/2); }
41 module HingeBodyPlan(){ translate([0, hinge_y]) circle(r= hinge_outer_r); }
43 module TubeClampLeftPlan(){
46 polygon([[ 0, hinge_y + hinge_outer_r ],
47 [ -main_outer_r + overlap_l, hinge_y + hinge_outer_r ],
48 [ -main_outer_r + overlap_l, bot_y ],
49 [ -clamp_gap/2, bot_y ],
60 module TubeClampLeft() { ////toplevel
61 linextr(-clamp_width/2, clamp_width/2)