add HC300 Z-rod gap alignment clip

parametric_bracket.scad

@@ -11,11 +11,12 @@ thickness=2.8;
 
 // uncomment one of the following to render
 
-corner_bracket();
+//corner_bracket();
 //t_bracket();
 //double_t_bracket();
-//alignment_sleeve(140, "Bot"); // for Hypercube 300 assembly
-//alignment_sleeve(155, "Top"); // for Hypercube 300 assembly
+//alignment_sleeve(140, "Bot"); // for Hypercube 300 assembly, bottom of vertical extrusions
+//alignment_sleeve(155, "Top"); // for Hypercube 300 assembly, top of vertical extrusions
+alignment_clip(78.75, ""); // for Hypercube 300 assembly, set gap for forward Z-axis rod clips
 //alignment_sleeve(60, ""); // for test fit
 
 // other constants needed later
@@ -96,15 +97,6 @@ module double_t_bracket()
 		brace();
 }
 
-module alignment_sleeves()
-{
-	alignment_sleeve(140, "Bot");
-	translate([1.5*tw,0,0])
-		alignment_sleeve(155, "Top");
-}
-
-// lower-level modules
-
 module alignment_sleeve(length, label)
 {
 	// frame tools:
@@ -123,6 +115,25 @@ module alignment_sleeve(length, label)
 		text(label, halign="center", valign="center", size=nominal_extrusion_width/2);
 }
 
+module alignment_clip(length, label)
+{
+	// frame tools:
+	// 78.75 mm from front of frame to front of forward Z-axis rod clips
+	
+	linear_extrude(length-tw-nominal_extrusion_width-thickness-gap)
+	difference()
+	{
+		square(nominal_extrusion_width+2*sleeve_gap+2*thickness, true);
+		square(nominal_extrusion_width+2*sleeve_gap, true);
+		translate([thickness,0,0])
+			square(nominal_extrusion_width+2*sleeve_gap, true);
+	}
+	translate([0,-iw-thickness/2,10])
+	rotate([90,0,0])
+	linear_extrude(1)
+		text(label, halign="center", valign="center", size=nominal_extrusion_width/2);
+}
+
 module brace() // a pair of braces
 {
 	d=tw/2-4;