topeak-mtx-tortec-expeditionrack-adapter: wip

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

diff --git a/topeak-mtx-tortec-expeditionrack-adapter.scad b/topeak-mtx-tortec-expeditionrack-adapter.scad
index dd9a3762da781f1726eba94c9f31e44ac2012992..a75f3a74059b178bb9ab528fdd0513ad10b112ea 100644 (file)
--- a/topeak-mtx-tortec-expeditionrack-adapter.scad
+++ b/topeak-mtx-tortec-expeditionrack-adapter.scad
@@ -15,8 +15,10 @@ brk_recess_actual = 5.20;
 rack_rail_dia = 10.40 + 0.50;
 rack_width_inner = 115.86 + 1.0; // between insides of rails
 
-rear_elevation_nominal = 10.04; // top of rack to bottom of bracket
+rear_elevation_nominal = 10.04;
+// ^ top of rack to bottom of bracket, at rear bolt hold
 rear_to_front_distance = 230;
+rear_to_cross_rail = 9.65; // bolt centre to rail centre, rail to rear
 
 general_gap_y = 1.0;
 
@@ -244,12 +246,13 @@ module Principal(){
 }
 
 module Front(){ ////toplevel
+  // xxx elevation is wrong
   Principal($elevation_nominal=0, $foreaftmaint_dz=0);
 }
 
 module Rear(){ ////toplevel
   Principal($elevation_nominal=rear_elevation_nominal,
-           $foreaftmaint_dz= 9.65);
+           $foreaftmaint_dz= rear_to_cross_rail);
 }
 
 module Demo(){ ////toplevel