From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 5 Nov 2022 01:45:57 +0000 (+0000)
Subject: topeak-mtx-tortec-expeditionrack-adapter: wip
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=68c16bc0bba7b794373648466006aebbc5d13d5f;p=reprap-play.git

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 eb819e1..dd9a376 100644
--- a/topeak-mtx-tortec-expeditionrack-adapter.scad
+++ b/topeak-mtx-tortec-expeditionrack-adapter.scad
@@ -41,6 +41,8 @@ brk_overall_w = 90.07;
 
 fit_slope_len = 5;
 
+foreaftmaint_r_slop = 0.75;
+
 main_sz_y = $strf * 20;
 grasp_sz = $strf * 12;
 beside_strap_sz = $strf * 8;
@@ -175,6 +177,10 @@ module Principal(){
     $rack_rail_y - rack_rail_dia/2
   ];
 
+  $foreaftmaint_rail_z = brk_block_z/2 + $foreaftmaint_dz;
+  $foreaftmaint_rail_y = $rack_rail_y
+    + $foreaftmaint_rail_z * rack_shear_ratio;
+
   difference(){
     union(){
       MainExtrude(){
@@ -218,16 +224,32 @@ module Principal(){
       }
     }
 
+    // Distance from bolt hole, in backwards direction
+    if ($foreaftmaint_dz) {
+      translate([ 0, $foreaftmaint_rail_y, $foreaftmaint_rail_z ]){
+	linextr_x_yz(+rack_rail_x,
+		     -rack_rail_x) {
+	  hull(){
+	    for (dy=[0,50]) {
+	      translate([-dy,0])
+		circle(r= rack_rail_dia/2 + foreaftmaint_r_slop);
+	    }
+	  }
+	}
+      }
+    }
+
     translate([ 0,0, brk_block_z/2]) BoltHole();
   }
 }
 
 module Front(){ ////toplevel
-  Principal($elevation_nominal=0);
+  Principal($elevation_nominal=0, $foreaftmaint_dz=0);
 }
 
 module Rear(){ ////toplevel
-  Principal($elevation_nominal=rear_elevation_nominal);
+  Principal($elevation_nominal=rear_elevation_nominal,
+	    $foreaftmaint_dz= 9.65);
 }
 
 module Demo(){ ////toplevel