added strain relief part by AndrewBCN

diff --git a/scad/frame-brace-v2.scad b/scad/frame-brace-v2.scad
dissimilarity index 77%
index 6a95fb3..309a9ef 100644 (file)
--- a/scad/frame-brace-v2.scad
+++ b/scad/frame-brace-v2.scad
@@ -1,36 +1,43 @@
-// Y frame brace for Wilson TS
-// by sgraber
-
-beam_size = 20;
-smidge = .65; // this is the amount needed for built-in slicing error (needs to be 
-              // about your nozzle width, maybe a little more so they aren't too tight)
-
-module fillet() {
-       difference() {
-               cube(size=[20+8,20,20]);
-               rotate([0,90,0]) translate([-20,0.5,0]) cylinder(r=10*2, h=30);
-       }
-}
-
-bracket();
-
-module bracket() {
- difference() {
-       union() {
-               cube(size=[beam_size+8,45,4]);
-               translate([0,70/2-29/2,0]) cube(size=[beam_size+8,beam_size + 4.7,30]);
-               translate([0,0.5,4]) fillet();
-               //translate([0,69.5,4]) mirror([0,1,0]) fillet();
-       }
-       #translate([-0.25+4,70/2-20.5/2,-1]) cube(size=[beam_size + smidge,beam_size + 2,40]);
-       translate([10+4,7+8,-5]) cylinder(r=3,h=50);
-       translate([10+4,7+8,5]) #cylinder(r=5.5,h=50);
-       translate([10+4,63,-5]) cylinder(r=3,h=50);
-       translate([10+4,63,4]) cylinder(r=5,h=50);
-       #cube(size=[40,5,10]);
-
-       translate([10+4,70,10+8]) rotate([90,0,0]) cylinder(r=3,h=70);
-       translate([10+4,21,10+8]) rotate([90,0,0]) #cylinder(r=5.5,h=70);
-       translate([10+4,25+70,10+8]) rotate([90,0,0]) cylinder(r=5,h=43);
- }
-}
\ No newline at end of file
+// Y frame brace for Wilson TS
+// by sgraber
+// further parameterized and fiddled with my mjrice
+
+beam_size = 20;
+smidge = .52; // about your nozzle width, maybe a little more so they aren't too tight).
+walls = 5;
+bracket_w = beam_size + (walls*2);
+
+module fillet() {
+       difference() {
+               cube(size=[bracket_w,beam_size,beam_size]);
+               rotate([0,90,0]) translate([-beam_size,0.5,0]) cylinder(r=10*2, h=bracket_w+1,$fn=60);
+       }
+}
+
+bracket();
+
+module bracket() {
+ difference() {
+       union() {
+               cube(size=[bracket_w,45,4]);
+               translate([0,70/2-29/2,0]) cube(size=[bracket_w,beam_size + 4.7,30]);
+               translate([0,0.5,4]) fillet();
+               //translate([0,69.5,4]) mirror([0,1,0]) fillet();
+       }
+       translate([walls-smidge/2,70/2-20.5/2,-1]) cube(size=[beam_size + smidge,beam_size + 2,40]);
+       translate([beam_size/2+walls,7+8,-5]) cylinder(r=3,h=50);   // inner hole
+       translate([beam_size/2+walls,7+8,5]) cylinder(r=5.5,h=50); // outer inset hole for screw head
+       //translate([beam_size/2+walls,63,-5]) cylinder(r=3,h=50);
+       //translate([beam_size/2+walls,63,4]) cylinder(r=5,h=50);
+       translate([-1,0,0]) cube(size=[bracket_w+2,5,10]); // cuts off the bit on the front
+
+       translate([beam_size/2+walls,70,10+8]) rotate([90,0,0]) cylinder(r=3,h=70); // inner hole
+       translate([beam_size/2+walls,21,10+8]) rotate([90,0,0]) cylinder(r=5.5,h=70); // outer inset hole for screw head
+       //translate([beam_size/2+walls,25+70,10+8]) rotate([90,0,0]) cylinder(r=5,h=43);
+
+    // bevels on bottom of the part, so that squashing of the first layer won't impact our fit to the extrusions:
+    translate([1,70/2-20.5/2,-3]) rotate([0,45,0]) cube(size=[beam_size,beam_size+2,beam_size]);
+    #translate([25.7,70/2-20.5/2-4,-3]) rotate([0,45,90]) cube(size=[2,beam_size+smidge*2,7]);
+    
+ }
+}
\ No newline at end of file

diff --git a/scad/strain_relief.scad b/scad/strain_relief.scad
new file mode 100644 (file)
index 0000000..cd45be6
--- /dev/null
+++ b/scad/strain_relief.scad
@@ -0,0 +1,80 @@
+//-- Stepper mounted extruder cable harness strain relief
+//-- with nylon ties
+//-- by AndrewBCN - Barcelona, Spain - December 2014
+//-- GPLV3
+
+//-- I designed this for use with Marty Rice's awesome
+//-- Direct Drive Extruder which I have installed on my
+//-- P3Steel, but it can probably be used for many other
+//-- extruder setups. Simple fact is,  there is a thick
+//-- bunch of electrical wires that comes out of the extruder, go
+//-- around the top of the printer and then down to the
+//-- RAMPS electronics. All this moves left and right together
+//-- with the X-carriage and common sense dictates that a strain
+//-- relief is required to avoid wire breakage and the usual
+//-- disastrous consequences.
+//-- I have designed this strain relief so that it is very easy
+//-- to install even after everything is in place. It requires
+//-- one long and two short nylon ties, the long one goes around
+//-- the stepper and the two shorter ones are tightened around the
+//-- cable harness.
+
+//-- Some tweaks by MRice - I made the bit around the cables 
+//-- curved so that it would grab a little better, and 
+//-- parameterized the larger ziptie cut and then made it a 
+//-- little wider than the original.
+
+//-- Parameters
+large_ziptie_w = 6;
+small_ziptie_w = 3;
+mount_w = 4 + large_ziptie_w;
+
+
+//-- Modules
+module ziptie_groove() {
+  rotate([90,0,0]) difference() {
+        cylinder(r=12,h=small_ziptie_w);
+        translate([0,0,-1]) cylinder(r=10,h=small_ziptie_w+2);
+  }
+}
+
+module strf() {
+  // stepper mount
+  difference() {
+    union() {
+      union() {
+           cube([17.2,6,mount_w]);
+       translate([17.2,0,0]) rotate([0,0,45]) cube([6,6,mount_w]);
+      }
+      mirror([1,0,0]) union() {
+        cube([17.2,6,mount_w]);
+           translate([17.2,0,0]) rotate([0,0,45]) cube([6,6,mount_w]);
+      }
+    }
+    // tunnel for nylon tie
+    translate([-25,2.2,mount_w/2-large_ziptie_w/2]) cube([50,large_ziptie_w/3,large_ziptie_w]);
+    // delete some useless material
+    translate([-30.4,-1,-.5]) cube([10,10,mount_w+1]);
+    mirror([1,0,0]) translate([-30.4,-1,-.5]) cube([10,10,mount_w+1]);
+  }
+  // arm
+  difference() {
+    union() {
+      translate([7,0,7]) cube([6,6,28]);
+      translate([7,6,25]) cube([6,6,10]);
+      translate([7,0,33]) rotate([0,45,0]) cube([6,12,10]);
+      translate([13,0,33]) mirror([1,0,0]) rotate([0,45,0]) cube([6,12,10]);
+      translate([7,0,33]) cube([6,12,10]);
+    }
+    // cup to hold harness
+    translate([10,16,49.5]) rotate([90,0,0]) scale([1,1.4,1]) #cylinder(r=9, h=18,$fn=40);
+    // save some material
+    translate([4,13.08,17.9]) rotate([45,0,0]) cube([10,10,10]);
+    // tunnels for nylon ties
+    translate([10,4,46]) #ziptie_groove();
+    translate([10,11,46]) #ziptie_groove();
+  }
+}
+
+//-- Print the part
+rotate([90,0,0]) strf();

diff --git a/stl/strain_relief.stl b/stl/strain_relief.stl
new file mode 100644 (file)
index 0000000..77d5a6d
--- /dev/null
+++ b/stl/strain_relief.stl
@@ -0,0 +1,2018 @@
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diff --git a/stl/ts/y-belt-holder-ts.stl b/stl/ts/y-belt-holder-ts.stl
dissimilarity index 99%
index ead5b6b..faedba2 100644 (file)
Binary files a/stl/ts/y-belt-holder-ts.stl and b/stl/ts/y-belt-holder-ts.stl differ