mic-table-clamp: fixes from Demo

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/mic-table-clamp.scad b/mic-table-clamp.scad
index 09624f0143983de0aaecc4d7fa1725d5ff54367d..cac94b720871c9cb3c36525b9d234685cb290cda 100644 (file)
--- a/mic-table-clamp.scad
+++ b/mic-table-clamp.scad
@@ -38,7 +38,7 @@ clamp_max_table_th = 35;
 
 clamp_hole_dia = thread_nom + 0.30;
 
-clamp_reg_clear_x = 6;
+clamp_reg_clear_x = 2.5;
 clamp_reg_clear_y = 0.75; // each side
 clamp_reg_extra_x = 4;
 
@@ -61,7 +61,7 @@ $test= true;
 
 wingnut_cnr = wingnut_wing_th/2 -0.1;
 
-clamp_reg_bot_x_min = stem_base_dia/2 + clamp_reg_clear_x - clamp_reg_sz2;
+clamp_reg_bot_x_min = -stem_base_dia/2 -clamp_reg_clear_x -clamp_reg_sz2;
 
 module OurThread(l){
   translate([0,0,-0.01])
@@ -141,8 +141,8 @@ module ClampTop(){ ////toplevel
       for (m=[0,1]){
        mirror([0,m,0])
          translate([0, clamp_reg_sz2/2 + clamp_reg_clear_y, 0])
-         rectfromto([-clamp_reg_bot_x_min - clamp_reg_extra_x, 0 ],
-                    [0,                            clamp_reg_sz1 ]);
+         rectfromto([clamp_reg_bot_x_min - clamp_reg_extra_x, 0 ],
+                    [0,                           clamp_reg_sz1 ]);
       }
       ClampHolePlan();
     }
@@ -169,15 +169,15 @@ module ClampBot(){ ////toplevel
   }
   translate([0, 0, clamp_bot_th]) {
     linextr(-clamp_reg_sz2, clamp_max_table_th+clamp_reg_sz2) {
-      translate([-clamp_reg_bot_x_min, 0]) {
+      translate([clamp_reg_bot_x_min, 0]) {
        rectfromto([ 0,             -clamp_reg_sz2/2 ],
                   [ clamp_reg_sz2, +clamp_reg_sz2/2 ]);
       }
     }
     linextr(-clamp_reg_sz2, 0) {
       difference(){
-       rectfromto([ -clamp_reg_bot_x_min, -clamp_reg_sz2/2 ],
-                  [  0,                   +clamp_reg_sz2/2 ]);
+       rectfromto([ clamp_reg_bot_x_min, -clamp_reg_sz2/2 ],
+                  [  0,                  +clamp_reg_sz2/2 ]);
        ClampHolePlan();
       }
     }